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Home My WebLink About1.11 Impact analysis) ) Williams Production RMT Company LLC TR 41-35-597 Communications Site Limited Impact Review Permit Application Submittal Item Tab 13-Impact Analysis-Section 4-502 E 1. Adjacent Property-Address list of real property adjacent to the subject property and the mailing address for each of the property owners. Please see Tab 6-Listing of Adjacent Property Owners. 2. Adjacent Lot Use-The use of the subject parcel and all parcels within a 1,500 foot radius of the site is utilized for natural resource development and grazing. All of the adjacent property is in the Resource Lands Zone District as well. 3. Site Features-The site is located at on the plateau at approximately 8,700 feet above sea level. The proposed communications facility will be located on a Colorado Oil and Gas Conservation Commission approved natural gas well pad. The site is relatively flat. The adjacent area is Aspen grove, brush and short grasses as the area has extreme weather during the winter time. 4. Soil Characteristics-Please find attached a Geotechnical Engineering Report dated June 20,2011, prepared by Geotechnical Engineering Group detai ling their investigation. The soi ls have been evaluated and will be acceptable for the installation of this communications facility. 5. Geology and Hazard-Please find attached in item 4 prior to this section, a Geotechnical Engineering Report dated June 20, 2011, prepare by Geotechnical Engineering Group detailing their investigation. Section 4.0 of their report details all Geologic Hazards, of which none have been identified on this site. 6. Effect on Existing Water Supply and Adequacy of Supply-See Tab 12-Section 7 above Section 7-104 Water Supply Plan. Page I of 5 7. Effect on Groundwater and Aquifer Recharge Areas-As noted on the attached Geotechnical Engineering Report dated June 20, 2011, no groundwater was encountered in Test Hole I to the depth of 25 feet. Please find attached a letter dated 7/6111 prepared by David Fox P.E. with Fox Engineering Solutions, LLC regarding this issue and concluding that the "proposed uses at the communications site will not impact groundwater or aquifer recharge areas." 8. Environmental Effects a. Flora and Fauna-Please find attached a report dated June 2011 prepared by WestWater Engineering detailing the potential effects on flora and fauna. The report concludes little to no impact from this project and flora and fauna. b. Archeological, cultural, paleontological and historic resources-Please find attached a "Report on the Class 1 Cultural Resource Inventory for a Limited Impact Review" dated June 27,2011 prepared by Carl Conner with Grand River Institute noting a Declaration of Negative Findings. c. Effect on designated environmental resources, including critical wildlife habitat. Please find attached a June 2011 report prepared by WestWater Engineering "Section 7-202 Protection of Wildlife Habitat Areas". This report concludes little to no impact from this project. d. Radiation Hazard-Please see find attached in item 4 of this section, a Geotechnical Engineering Report dated June 20, 2011, prepare by Geotechnical Engineering Group detailing their investigation. Section 4.1 of their report notes that this site should not have a radiation hazard, nor has this site been identified by any State or County agencies as having a radiation hazard. e. Spill Prevention Control and Countermeasures Plan-as this project does not have 1,320 gallons of material, it is exempt from federal regulation. Please find attached a Spill Prevention and Response Plan dated May 2010 for Williams Production RMT Company LLC. 9. Traffic-Assessment of traffic impacts through preparation of a Traffic Study as detailed in Section 4-502 J.3. Section 4-502 J.3-"Basic Traffic Analysis" is noted below. a. Mapping-Please find mapping attached in Tab 7-Vicinity Map-Noting access to the site from County Road 215 and Garden Gulch Road, a private road. b. Narrative for the existing land use. 1. The existing site requires 2 visits to the site per year by pickup truck for maintenance purposes for the existing communications tower. 2. There is currently a driveway permit in existence for the Garden Gulch Road access to County Road 215. Page 2 of 5 3. There are currently no permits for access to state highways for this project, nor are any needed. 4. Access easement-Please find attached "Road Construction and Maintenance Agreement" dated 111112005, recorded on 6125/07 -Garfield County Reception #726196 is attached. This document allows for Chevron USA, Inc., Williams Production RMT Company LLC and other parties to utilize Garden Gulch Road for access to this project. 5. There are no other legal constraints that apply. c. Trip Generation-narrative for the proposed land use-1. Construction Phase-This will take 30 days and will involve 2 pickup trucks per day for construction employees, 5 concrete trucks to pour all of the concrete needed for the project, one crane trip and two truck and trailer trips for hauling the building and the tower to the site. 2. Completed development-2 visits to the site per year for maintenance purposes by pickup truck. d. Construction Phase-1. Staging and storage areas-All staging will occur on site. 2. Temporary access points-none are required for this project. 3. Duration, types and frequency of heavy truck traffic. As noted in 9.c.1. above, the 5 concrete trucks will deliver concrete to the site. These trips will likely occur in a 2 day period. 4 trips on 1 day and I trip on a 2nd day. The 2 truck and trailer trips for hauling the building and the tower to the site will occur on 2 separate days. The crane trip will occur on I day. 4. Access road segments to be impacted-County Road 215 and Garden Gulch Road will be impacted by this development. 5. Lane closures or traffic interruption-There will be none. 6. County or state permits required-It is not anticipated that overweight or overIength loads will be needed for the site. If this does occur, the appropriate state and Garfield County permits will be applied for and secured by the trucking company. e. Map depicting existing Average Daily Traffic County information for County Road Segments. 1. Please find attached mapping noting traffic counts on County Road 215 taken on March 19 and March 20, 2010. These traffic counts were taken at approximately 3200 County Road 215 Parachute, CO, approximately 3 miles down valley from the Garden Gulch access point. Upvalley traffic on CR 215 had the following peak hour traffic measured in passenger car equivalents: AM Noon PM 310 157 90 Downvalley traffic on CR 215 had the following peak hour traffic measured in passenger car equivalents: AM Noon PM 86 145 263 Page 3 of 5 Proposed Development Construction Trips-Peak hour traffic measured in passenger car equivalents-(Truck= 3 passenger car trips)-8 trips. 8 trips in the AM peak hour divided by 86 trips in the downvalley equals a 9% increase in CR 215 on 2 days during construction of the project. There is no yearly increase in traffic to the communications site as the traffic will remain at 2 pickup trucks per year for maintenance of the facility. The traffic impact is insignificant when taken in light of existing traffic counts and the small impact of this project. 10. Nuisance. Impacts on adjacent land from generation of vapor, dust, smoke, noise, glare or vibration, or other emanations. A. Vapor and Smoke-The communications facility will be powered by solar panels and a tower-mounted wind generator. A 25KW liquid propane fired generator will be installed within the communications building. This unit will exercise approximately every 2 weeks for 15 minutes. The generator only runs when the solar panels and wind generator have not provided enough power to charge the batteries that provide power for the communications system. There is approximately 4 days of batter power available at the site. It is estimated that the generator will operate approximately 6 hours per year. In conclusion, vapor and smoke from this facility will be only that produced from the 25KW generator when it is running. B. Dust-The site construction will consist of approximately 1,500 square feet of disturbance and dust control will be provided by water truck during the 1 month construction period. After completion of construction, the area will be graveled to prevent dust. C. Noise and Vibration-Please find attached a noise study dated 7/8/11 prepared by Hankard Environmental, Inc. noting compliance with Colorado Oil and Gas Conservation Commission Rule 802-Noise Abatement for the proposed communications building housing the backup generator and the wind generator. This report additionally notes compliance with the Garfield County ULUR Section 7-810 F in regards to vibration. D. Glare-The facility has been designed to reduce glare. The solar panels on the roof will be dark black. The tower color will be galvalume and the building color will be dark tan. 11. Reclamation Plan-Section 7-212. Please find attached the Reclamation Plan dated June 2011 prepared by HRL Compliance Solutions, Inc. for the project. This reclamation plan details reclamation occurring after the useful life of the communications facility in Page 4 of 5 ) the next 40-50 years. However, it is highly likely that the site will be used in-perpetuity for communications because of the location. 12. Improvements Agreement-Performance Bond-Section 4-502 1.2. The proposed communications site is located within the boundaries of the TR 41-35-597 Colorado Oil and Gas Conservation Commission natural gas well pad. Please find attached the COGCC Form 2-Applications for Permits to drill for this well pad. Please also find attached blanket bond number K04991291 noted on COGCC Form 3 that covers surface reclamation on this COGCC approved well pad. This bond wi ll preclude Garfield County from requiring a separate bond for reclamation of this site as the entirety of the communications facility is located on this well pad. This is the same situation and previously decided by Garfield County where the Williams Trail Ridge Man Camp is located on a COGCC approved natural gas well pad. We have thoroughly stud ied this site and feel that we have identified and mitigated the impacts of this project in full compliance with local, state and federal regulations. Thank you for your assistance on this project. Please contact me with any questions. Sincerely ~G~~~~~ Philip B. Vaughan President PVCMI-Land Planning Division Page 5 of 5 o ) ~~ I I GEOTECHNICAL LNGINLLI~ I NG G llL1UP A lrerracon COMPANY Geotechnical Engineering Report Williams 80 Ft Communication Tower Section 35, Township 5 South, Range 97 West, 6th Principal Meridian Garfield County, Colorado June 20, 2011 Terracon Project No. AD114029 Prepared for: ThinAir Communications 27473 Forest Ridge Drive Kiowa, Colorado 80117 Prepared by: Terracon Consultants, Inc. Grand Junction, Colorado June 20, 2011 ThinAir Communications 27473 Forest Ridge Drive Kiowa, Colorado 80117 Attn: Mr. Philip Sprouse Re: Geotechnical Engineering Report Williams 80 Ft Communication Tower Garfiled County, Colorado Terracon Project Number: AD114029 Dear Mr. Sprouse: ~'I I GEOTECHNICAL LN[J I NLU~ IN G GI~UUP A lrerracon COMPANY Terracon Consultants, Inc. (Terracon) has completed the geotechnical engineering selVices for the above referenced project. This study was performed in general accordance with the Geotechnical Engineering Agreement between ThinAir Communications and Terracon. This report presents the findings of the subsurface exploration and provides geotechnical recommendations concerning earthwork and the design and construction of foundations, floor slabs and pavements for the proposed project. We appreciate the opportunity to be of selVice to you on this project. If you have any questions concerning this report, or if we may be of further selVice, please contact us. Sincerely, Terracon Consultants, Inc. Norman W. Johnston, P.E. Senior Engineer Enclosures cc: 1 -Client (bound) 1 -psprouse@thinaircommunicalions.com (electronic-PDF) 1 -File John P. Withers, P.E. Senior Engineer Geotechnical Engineering Group. A Terracon Company 2308 Interstate Avenue Grand Jun ctio n, CO 81505 P [970) 245-4078 F [970) 245·71 15 geolechnicalgroup .com terracon.com Geotechnical • Environmental • Construction Materials • Facilities ) ) TABLE OF CONTENTS Page EXECUTIVE SUMMARY ............................................................................................................... i 1.0 INTRODUCTION ........................... .................................................................................... 1 2.0 PROJECT INFORMATION ........................................................................................ ....... 1 2.1 Project Description .......................................................................... , ..................... 1 2.2 Site Location and Description .............................. .................................................. 2 3.0 SUBSURFACE CONDITIONS .......................................................................................... 2 3.1 Typical Profile .................................................................................. , ..................... 2 3.3 Groundwater .................................................................. ........................................ 3 4.0 GEOLOGIC HAZARDS .................................................................................................... 3 4.1 Radioactivity .............................................................................................. 4 4.2 Seismic Consideration ............................................................................ ... 4 4.3 Ground Subsidence ................................................................................... 4 4.4 Landslides ...................................................................... ........................... 4 4.5 Avalanche .................................................................................................. 4 4.6 Rockfall ......................................... ............................................................. 4 4.7 Flood .......................................................................................................... 5 4.8 Mudflow and Debris Fans .......................................................................... 5 4.9 Expansive Soil and Rock .................................................................. ......... 5 4.1 0 Slopes ........................................................................................................ 5 5.0 RECOMMENDATIONS FOR DESIGN AND CONSTRUCTION ................... .................... 5 5.1 Geotechnical Considerations ................................................................................. 5 5.1.1 Existing Utilities ................................... ....................................................... 6 5.1.2 Swell Potential ..................................................................... ' ..................... 6 4.1.3 General ...................................................................................................... 6 5.2 Earthwork ........................................................................ ...................................... 7 5.2.1 Site Preparation ......................................................................................... 7 5.2.2 Material Requirements ............................................................................... 7 5.2.3 Compaction Requirements ........................................................................ 8 5.2.4 Utility Trench Backfill ........................................................... , ..................... 8 5.2.5 Grading and Drainage ...................................................... ......................... 8 5.2.6 Construction Considerations ...................................................................... 9 5.3 Drilled Shaft Design recommendations ....................... ......................................... 10 5.3.1 Drilled Shaft Construction Considerations ............................................... 12 5.4 Footing Foundations ............................... ............................................................. 13 5.4.1 Footing Foundation Design Recommendations ....................................... 13 5.4.2 Footing Foundation Construction Considerations .................................... 13 5.5 Seismic Considerations ....................................................................................... 14 5.6 Floor Slab ......................................................................................... , .................. 15 5.7 Lateral Earth Pressures .................................................... ................................... 15 6.0 GENERAL COMMENTS ..........................................................................................•...... 17 TABLE OF CONTENTS CONTINUED APPENDIX A -FIELD EXPLORATION Figure A-1 Figure A-2 Figure A-3 Figures A-4 to A-5 Site Location Map Boring Location Diagram Field Exploration Description Boring Logs APPENDIX B -LABORATORY TESTING Figure B-1 Table B-1 Figure B-2 and B-3 Figure B-4 Laboratory Testing Summary of Laboratory Testing Swell/Consolidation Test Results Direct Shear Strength Test Results APPENDIX C -SUPPORTING DOCUMENTS Exhibit C-1 Exhibit C-2 Exhibit C-3 General Notes Unified Soil Classification System General Notes -Rock Properties ) ) Geotechnical Engineering Report Williams 80 Ft Communication Tower . Garfield County, Colorado June 20,2011 • Terracon Project No,AD114029 EXECUTIVE SUMMARY ~' I I GEOTECHNICAL ENGINEERING GROUP A lrtlrrilcon COMPANY A geotechnical investigation has been performed for the proposed 80 foot communications tower to be located in the Northwest Y. of the Northeast Y. of Section 35, Township 5 South, Range 97 West, 6th Principal Meridian in Garfield County, Colorado, One (1) exploratory test borings, designated TH-1, was performed to a depth of approximately 25 feet below the existing ground surface within the proposed communication tower area, Foundation support and other geotechnical conditions were evaluated using the information obtained from our subsurface exploration, The following geotechnical considerations were identified: • Approximately 9 feet of very silty and gravelly clay was encountered in the borings underlain by shale and siltstone formational material. Virtual refusal to auger drilling was encountered in the exploratory test boring at a depth of about 25 feet. • On-site soils appear suitable for use as compacted structural fill; however, if they do not meet the low plasticity fill criteria, they should not be utilized within 24 inches of the finished grade beneath at-grade building areas, • The 2009 International Building Code (IBC), Table 1613,5,2 seismic site classification for this site is C, • Close monitoring of the construction operations discussed herein will be critical in achieving the design subgrade support, We therefore recommend that the Terracon be retained to monitor this portion of the work, This summary should be used in conjunction with the entire report for design purposes, It should be recognized that details were not included or fully developed in this section, and the report must be read in its entirety for a comprehensive understanding of the items contained herein, The section titled GENERAL COMMENTS should be read for an understanding of the report limitations, Reliable _ Respon Sive _ COIiVelllf'nt • Innovative GEOTECHNICAL ENGINEERING REPORT WILLIAMS 80 FT COMMUNICATION TOWER GARFIELD COUNTY, COLORADO Terracon Project No. AD114029 June 20, 2011 1.0 INTRODUCTION A geotechnical engineering report has been completed for the proposed 80 foot communication tower to be in the Northwest Y. od the Northeast Y. of Section 35, Township 5 South, Range 97 West, 61h Principal Meridian in Garfield County, Colorado. One exploratory test boring, designated TH-1 was performed to a depth of approximately 25 feet below the existing ground surface within the proposed communication tower areas. The log of the exploratory test boring along with a site location map and boring location diagram are included in Appendix A of this report. The purpose of these services is to provide information and geotechnical engineering recommendations relative to: • subsurface soil conditions • lateral earth pressures • groundwater conditions • foundation design and construction • earthwork • seismic considerations 2.0 PROJECT INFORMATION 2.1 Project Description ITEM DESCRIPTION Site layout See Appendix A, Figure A-2: Boring Location Diagram We understand the proposed communication tower will be self-Structure supported, 80 feet high and include three legs. The leg spacing will be approximately 11 feet at the base. Finished floor elevation (FFE) No floors are included with the current proposed construction. Axial Load: 8.5 kips Maximum loads Shear per Leg: 36 kips Uplift per leg: 55 kips Site grading plans were not available at the time that this report was Grading prepared, however we assume that less than 2 feet of cut and/or fill will be required to achieve final grade. Reii rlble • ResjJonsive _ Convenient _ Innovative ) ) ) Geotechnical Engineering Report Williams 80 Ft Communication Tower . Garfield County, Colorado June 20, 2011 • Terracon Project No. AD114029 ~'I I GEOTECHNICAL ENGINEERING GROUP A lrClrracon COMPANY ITEM DESCRIPTION Cut and fill slopes Assumed to be no steeper than 3H:1V (Horizontal to Vertical). Below grade areas I None anticipated 2.2 Site Location and Description ITEM Location Current ground cover Existing topography DESCRIPTION This project will be located in the Northwest Y. of the Northeast Y. of Section 35, Township 5 South, Range 97 West, 61h Principal Meridian in Garfield County, Colorado Open, vacant wilt little vegetation. The site is currently an existing well pad with gas field associated equipment. The majority of the proposed site is relatively level. 3.0 SUBSURFACE CONDITIONS 3.1 Typical Profile Based on the results of the borings, subsurface conditions on the project sile can be generalized as follows: Stratum I 2 Approximate Depth to Bottom of Stratum (feet) 9 9 to 25 Material Description Very silty and gravelly clay Interlayered formational shale and siltstone Consistency/Density Medium stiff to stiff Hard to very hard The shallow soil encountered in Ihe boring consisted generally of silty clay and was of moderate plasticity. The formational shale and siltslone was clayey to very clayey and was of moderate plasticity. The samples tested had the following measured tested properties: Reliable . Responsive . ConVOlllDnt • InnovatIve 2 Geotechnical Engineering Report Williams 80 Ft Communication Tower . Garfield County, Colorado June 20,2011 • Terracon Project No. AD114029 Measured Estimated Sample Depth (feet) volume swell Location change pressure (%) (pst) TH-1 4 0.0 I NA TH-1 9 TH-1 14 +0.2 1,000 ~' I I GEOTECHNICAL ENGINEERING GROU P A lrerracon COMPANY Measured Measured internal Cohesion angle of (pst) friction (degrees) ----24 475 Conditions encountered at the exploratory test boring location are indicated on the individual test boring log. Stratification boundaries on the boring log represent the approximate location of changes in soil types; in situ, the transition between materials may be gradual. Details for each of the borings can be found on the boring logs in Appendix A of this report. 3.3 Groundwater The exploratory test boring was observed while drilling and after completion for the presence and level of groundwater. Groundwater was not observed in the boring during drilling or for the short amount of time the borings were allowed to remain open following drilling completion. However, this does not necessarily mean that the borings were terminated above groundwater. Due to the ) low permeability of the materials encountered in the exploratory test borings, a relatively long period of time may be necessary for a groundwater level to develop and stabilize in a borehole in these materials. Long term observations in piezometers or observation wells sealed from the influence of surface water are often required to define groundwater levels in materials of this type. Groundwater level fluctuations occur due to seasonal variations in the amount of rainfall, runoff and other factors not evident at the time the borings were performed. In addition, perched water can develop over low permeability soil strata. Therefore, groundwater levels during construction or at other times in the life of the structure may be higher or lower than the levels indicated on the boring logs. The possibility of groundwater level fluctuations should be considered when developing the design and construction plans for the project. 4.0 GEOLOGIC HAZARDS House Bill 1041 as passed by the Colorado State Legislature in 1974 was to deSignate geologic hazards that, if present, may pose a threat to life or property. Geologic hazards, outlined by House Bill 1041 , are discussed below. Reliable . Responsive . Convenient . Innovative 3 ) Geotechnical Engineering Report Williams 80 Ft Communication Tower _ Garfield County, Colorado June 20, 2011 _ Terracon Project No. AD114029 4.1 Radioactivity ~' I I GEOTECHNICAL , ENGINEERING GROUP A lrerracon COMPANY We did not observe conditions that indicate naturally occurring radioactive material or tailings on the site at the time of our field exploration. A review of "Radon Reduction in New Construction, An Interim Guide: OPA-87-009 by the Environmental Protection Agency dated August 1987 indicated that currently there are no standard procedures for soil radon tests or for correlating the results of soil tests with indoor radon levels. Based on our experience in the area we anticipate some potential for radon exists on the site. Construction on the site should include techniques to reduce the potential for radon levels in structures. We recommend follow up fadon testing in enclosed structures after construction is complete to verify radon levels in the structure. 4.2 Seismic Consideration The nearest identified fault is about 30 miles east and west of the site. The subject site is located in seismic zone 1 as identified by the 2000 Uniform Building Code. Based on our observations of the site and review of available data we do not feel that significant hazard from seismic activity exists at the site. 4.3 Ground Subsidence ) We did not observe any large scale mining features on or near the site. Our experience in the area indicates a potential for settlement of the site soils when wetted. Recommendations for foundation settlement considerations are presented below. 4.4 Landslides No landslides were observed on or influencing the proposed communication tower site. We feel that landslide hazard does not exist on or influencing the subject site. 4.5 Avalanche No steep slopes were observed above or influencing the site. We feel that avalanche hazard does not exist on or influencing the subject site. 4.6 Rockfall We did not observe formational outcrops or talus slopes on or above the site that would provide a source or rocks for rockfall hazard. Based on our observations of the site we feel that rockfall hazard does not exist on the subject site. Re liable _ Responsive _ Convenient _ Innovative 4 Geotechnical Engineering Report ~' I I GEOTECHNICAL Williams 80 Ft Communication Tower _ Garfield County, Colorado ENGINEERING GROUP June 20, 2011 _ Terracon Project No. AD114029 A lrerrilcon COMPANY 4.7 Flood We did not observe streams or drainage channels on or influencing the site. We do not feel flood hazard exists on the subject site. A flood study was not included in the scope of services. Heavy precipitation events may result is some shallow sheet flows across the site. 4.8 Mudflow and Debris Fans We did not observe mudflow and debris fans on or influencing the site. We feel mudflow and debris fan hazard does not exist on the site. 4.9 Expansive Soil and Rock The Uintah formation is the formational material underlying the site. Our experience in the area indicates the Uintah formation contains Shale layers that typically have a high swell potential when wetted. The Shale weathers to a clay and shale fragment soil that is likely to be expansive. Our test borings encountered silty clay and claystone formational material. Although not indicated by the laboratory swell test, the silty clay soils encountered typically have swell potential. A recommendations to address the soil characteristics and design recommendations for the tower structure are presented below. 4.10 Slopes No significant slopes were observed on or influencing the site. Based on our observations we feel unstable slope hazards do not exist on or influencing the site. Based on our site visit and review, it is our opinion, with proper civil, structural and geotechnical engineering design, no geologic hazards were identified which would preclude development of the subject site. 5.0 RECOMMENDATIONS FOR DESIGN AND CONSTRUCTION 5.1 Geotechnical Considerations Special geotechnical considerations for this project include the following : Reliable _ Responsive _ Convenient _ Innovative 5 ) ) Geotechnical Engineering Report Williams 80 Ft Communication Tower . Garfield County, Colorado June 20, 2011 • Terracon Project No. AD114029 ~' I I GEOTECHNICAL ENGINEERING GROUP A lrerr<lcon COMPANY • The presence of soil and formational material with volume change potential with variations in moisture content and structure loads. 5.1.1 Existing Utilities Based upon observations made at the project site, it appears that there are existing underground utilities on or near the project site. If these utilities are to be relocated, the resulting trenches should be overexcavated and backfilled properly and tested in accordance with the recommendations in this report in section 5.2 Earthwork. 5.1.2 Swell Potential The soil present near the anticipated foundation level is active and prone to volume change with variations in moisture content. For this reason we recommend a deep foundation supported below the zone of moisture variation or low volume change zone be constructed beneath all shallow foundations. The procedures for using a low volume change zone as recommended in this report may not eliminate all future subgrade volume change and resultant shallow ) foundation and floor slab movements. However. the procedures outlined should significantly reduce the potential for subgrade volume change. Additional reductions in floor slab movements could be achieved by using a thicker low volume change zone. Details regarding this low volume change zone are provided in section 4.5 Floor Slab. Any compacted structural fill placed in the upper 24 inches beneath the building areas should meet the requirements for Low Volume Change Material which is defined in this report, section 4.2 Earthwork. This report provides recommendations to help mitigate the effects of soil shrinkage and expansion. However, even if these procedures are followed , some movement and at least minor cracking in the structure could still occur. The severity of cracking and other cosmetic damage such as uneven floor slabs on grade will probably increase if any modification of the site results in excessive wetting or drying of the expansive soils. Eliminating the risk of movement and cosmetic distress may not be feasible, but it may be possible to further reduce the risk of movement if significantly more expensive measures are used during construction. We would be pleased to discuss other construction alternatives with you upon request. 4.1.3 General We recommend that the exposed subgrade be thoroughly evaluated after stripping of any topsoil and creation of all cut areas, but prior to the start of any fill placement or foundation construction operations. We recommend that the geotechnical engineer be retained to evaluate the bearing material for the foundations soils. Subsurface conditions, as identified by the field Reliable . Responsive . Convenient . Innovative 6 Geotechnical Engineering Report Williams 80 Ft Communication Tower _ Garfield County, Colorado June 20, 2011 _ Terracon Project No. AD114029 ~' I I GEOTECHNICAL , ENGINEERING GROUP A lrerracon COMPANY and laboratory testing programs, have been reviewed and evaluated with respect to the proposed structure plans known to us at this time. 5.2 Earthwork 5.2.1 Site Preparation After stripping or excavating to rough grade, and prior to placing new fill, the subgrade and all existing undocumented/uncontrolled fill, if any, remaining in-place should be evaluated by a Terracon representative. This could include in-place field density tests, proofrolling, and test pits, as appropriate. Proof-rolling can be performed with a loaded tandem axle dump truck. Unsuitable areas observed at this time should be improved by scarification and recompaction or by undercutting and replacement with suitable compacted fill. Additional removal may need to be performed if further unstable or unsuitable material is observed. 5.2.2 Material Requirements Compacted structural fill should meet the following material property requirements: Fill Type 1 I USCS Classification I Acceptable Location for Placement Lean clay CL (LL<40) All locations and elevations Lean to fat clay CUCH (40<LL <50) > 24 inches below building finished grade unless tested and meets low volume change material criteria Fat clay 2 CH (LL>50) > 24 inches below building finished grade Well graded granular GM ' All locations and elevations Low Volume Change CL (LL <50 & PI<22) All locations and elevations Material' orGM ' The on-site soil appears suitable for use as fill On-site soils CL > 24 inches below building finished grade unless tested and meets low volume change material criteria 1. Compacted structural fill should consist of approved materials that are free of organic matter and debris. Frozen material should not be used, and fill should not be placed on a frozen subgrade. A sample of each material type should be submitted to the Terracon for evaluation. 2. Delineation of moderate to highly plastic clays should be performed in the field by a qualified geotechnical engineer or their representative, and could require additional laboratory testing. 3. Similar to COOT Class 6 crushed aggregate. If frost heave is not a concern, then COOT Class 2 crushed aggregate or granular material such as sand, gravel or crushed stone containing at least 18% low plasticity fines may also be used. Material should be approved by the geotechnical engineer. 4. Low plasticity cohesive soil or granular soil having low plasticity fines. Material should be approved by the geotechnical engineer. Reliable _ Responsive _ Convenient _ Innovative 7 ) ) Geotechnical Engineering Report Williams 80 Ft Communication Tower . Garfield County, Colorado June 20, 2011 • Terracon Project No. AD114029 ~'I I GEOTECHNICAL ENGINEERING GROUP A lrerracon COMPANY 5.2.3 Compaction Requirements ITEM I Fill Lift Thickness Compaction Requirements 1 Moisture Content -Cohesive Soil Moisture Content -Granular Material DESCRIPTION 9 inches or less in loose thickness when heavy, selfpropelled compaction equipment is used 4 to 6 inches in loose thickness when hand-guided equipment (i .e. jumping jack or plate compactor) is used 95% of the material's maximum standard Proctor dry density (ASTM 0 698) Within the range of optimum moisture content to 4% above optimum moisture content as determined by the standard Proctor test at the time of placement and compaction Workable moisture levels 2 1. We recommend that compacted structural fill be tested for moisture content and compaction during placement. Should the results of the in-place density tests indicate the specified moisture or compaction limits have not been met, the area represented by the test should be reworked and retested as requ ired until the specified moisture and compaction requirements are achieved. 2. Specifically, moisture levels should be maintained low enough to allow for satisfactory compaction to be achieved without the cohesion less fill material pumping when proofrolled. ) 5.2.4 Utility Trench Backfill All trench excavations should be made with sufficient working space to permit construction including backfill placement and compaction. If utility trenches are backfilled with relatively clean granular material, they should be capped with at least 18 inches of cohesive fill in non-pavement areas to reduce the infiltration and conveyance of surface water through the trench backfill. Utility trenches are a common source of water infiltration and migration. All utility trenches that penetrate beneath the structure should be effectively sealed to restrict water intrusion and flow through the trenches that could migrate below the structure. We recommend constructing an effective clay "trench plug" that extends at least 5 feet out from the face of the foundation exterior. The plug material should consist of clay compacted at a water content at or above the soil's optimum water content. The clay fill should be placed to completely surround the utility line and be compacted in accordance with recommendations in this report. 5.2.5 Grading and Drainage Final surrounding grades should be sloped away from the structure on all sides to prevent ponding of water. Gutters and downspouts that drain water a minimum of 10 feet beyond the footprint of the proposed structure are recommended. This can be accomplished through the use of splash-blocks, downspout extensions, and flexible pipes that are designed to attach to the end of the downspout. Flexible pipe should only be used if it is daylighted in such a manner that it gravity-drains collected water. Reliable _ Re ~ ponsjve _ Convenient . Innovative 8 Geotechnical Engineering Report Williams 80 FI Communicalion Tower _ Garfield Counly, Colorado June 20, 2011 _ Terracon Projecl No. AD114029 5.2.6 Construction Considerations ~'I I GEOTECHNICAL ENGINEERING GROUP A lrerr<lcon COMPANY It is possible that the subgrade and/or base of over-excavations will be unstable upon initial exposure. Unstable subgrade conditions could worsen during general construction operations, particularly if the soils are wet or subjected to repetitive construction traffic. The use of light construction equipment would aid in reducing subgrade disturbance. The use of remotely operated equipment, such as a backhoe, would be beneficial to perform cuts and reduce subgrade disturbance. Should unstable subgrade conditions be encountered, stabilization measures will need to be employed, and could consist of one of the methods outlined below. _ Scarification and Recompaction -It may be feasible to scarify, dry, and recompact the exposed soils. The success of this procedure would depend primarily upon favorable weather and sufficient time to dry the soils. Stable subgrades likely would not be achievable if the thickness of the unstable soil is greater than about 1 foot, or if construction is performed during a period of wet weather when drying is difficult. ) -Crushed Stone -Crushed stone or crushed gravel could be used to improve subgrade stability. Typical undercut depths would be expected to range from about 6 to 24 inches below finished subgrade elevation. The use of high modulus geotextiles (i.e., engineering fabric or geogrid) could also be considered after underground work such as utility construction is completed. Prior to placing the fabric or geogrid, we recommend that all below grade construction, such as utility line installation, be completed to avoid damaging ) the fabric or geogrid. Equipment should not be operated above the fabric or geogrid until one full lift of crushed stone fill is placed above it. The maximum particle size of granular material placed over geotextile fabric or geogrid should not exceed 1 Y, inches. Granular gradation requirements provided by the geosynthetic product manufacturer should be verified prior to material purchase and delivery to the site. Further evaluation of the need and recommendations for subgrade stabilization can be provided during construction as the geotechnical conditions are exposed on a broad scale; however we recommend that the owner budget for, and the contractor be prepared for subgrade stabilization. Upon completion of filling and grading, care should be taken to maintain the subgrade moisture content prior to construction of foundations, floor slabs, and pavement areas. Construction traffic over the completed subgrade should be avoided to the extent practical. The site should also be graded to prevent ponding of surface water on the prepared subgrades or in excavations. If the subgrade should become frozen, desiccated, saturated, or disturbed, the affected material should be removed or these materials should be scarified, moisture conditioned, and recompacted prior to foundation construction. Reliable _ Responsive _ Convenient _ Innovative 9 ) ) Geotechnical Engineering Report Williams 80 Ft Communication Tower . Garfield County, Colorado June 20, 2011 • Terracon Project No. AD114029 "'IIII~ I I GEOTECHNICAL ENGINEERING GROUP A lrerrilcon COMPANY As a minimUm, all temporary excavations should be sloped or braced as required by Occupational Health and Safety Administration (OSHA) regulations to provide stability and safe working conditions. Temporary excavations will probably be required during grading operations. The grading contractor, by his contract, is usually responsible for designing and constructing stable, temporary excavations and should shore, slope or bench the sides of the excavations as required , to maintain stability of both the excavation sides and bottom. All excavations should comply with applicable local, state and federal safety regulations, including the current OSHA Excavation and Trench Safety Standards. The geotechnical engineer should be retained during the construction phase of the project to observe earthwork and to perform necessary tests and observations during subgrade preparation; proof-rolling; placement and compaction of controlled compacted fills; backfilling of excavations into the completed subgrade, and just prior to construction of building floor slabs. 5.3 Drilled Shaft Design recommendations Subsurface conditions indicate that the foundation with the least likelihood of post construction foundation movement is a deep foundation supported in the formational claystone below the zone of moisture variation . Drilled shaft piers will satisfy this condition. The communication tower may be supported by a drilled pier foundation system bearing within the shale/siltsotne bedrock. The drilled shafts should be designed to support the loads entirely through tip resistance (end-bearing). A combination of tip resistance and shaft resistance should not be used. Our recommended design parameters for each drilled pier foundations are provided in the following tables. Reliable _ Responsive _ COflvoni(:llt • Innovative 10 Geotechnical Engineering Report Williams 80 Ft Communication Tower . Garfield County, Colorado June 20, 2011 • Terracon Project No. AD114029 ~'I I GEOTECHNICAL E N GI N EE r~IN G GI<OUP A 1rC!rr<lcon COMPANY Design Parameters Depth Nominal Shaft Nominal Tip Cohesion Internal Stalic Below Unit Shaft Res. Tip Res. IShear Angle of Strain Lateral Existing Weight Resistance Factor Resistance Factor Strength Friction c,. • Subgrade Grade (pcl) 2 Modulus (feet) 1 (psI) 3 (psI) 4 (psI) (Degrees) (pc I) • 0 -4 Ignore Ignore Ignore Ignore Ignore Ignore Ignore Ignore Ignore Native Clay 115 250 0.55 NR ' NR ' 475 24 0.012 250 4-9 Shale and Siltstone 150 9,500 0.55 25,000 0.50 ' 1,000 30 0.0005 2,500 Below 9 1. Shaft construction observation is recommended to adjust shaft length if variable soil or bedrock conditions are encountered. 2. We recommend a design groundwater level equal to about 9 feet below the existing ground surface or less. To determine effective unit weight below the recommended groundwater level, subtract 63 pcf from the unit weight value listed in the table. 3. Shaft resistance within the native clay to be used for uplift only. Shaft Resistance within weathered limestone and limestone to be used only when tip resistance is not utilized. 4. Minimum shaft length of 22 feet below the existing grade reguired. Terracon should be contacted if the shaft length is less than 22 feet below the existing grade as modifications to our design parameters may be warranted. The drilled shaft must extend 10 feet, or one shaft diameter, whichever is greater, into the bearing strata to achieve the full listed capacity. If Tip resistance is used to support the shaft, all shaft resistance should be ignored. 5. NR = Not Recommended 6. Lateral subgrade modulus and c" values provided above are to be used with LPILEPluS software. The above-indicated cohesion, friction angle, lateral subgrade modulus, and strain (£50) are ultimate values without factors of safety. The tip resistance and shaft resistance are ultimate values and should have the respective resistance factors applied in accordance with LRFD design procedures. The values given in the above table are based on our borings and past experience with similar soil types. Lateral resistance and friction in the upper 4 feet should be ignored due to the potential effects of frost action, desiccation, and drilling disturbance. Drilled shafts designed and constructed to bear in suitable materials as described above would be expected to experience long-term total settlement of less than Yz-inch. Differential settlement is not expected to exceed one-half of the total settlement. Rrllable _ Responsive _ Convenient _ InnovatIve 11 ) ) Geotechnical Engineering Report Williams 80 Ft Communication Tower . Garfield County, Colorado June 20,2011 • Terracon Project No. AD114029 5.3.1 Drilled Shaft Construction Considerations ~' I I GEOTECHNICAL ENGINEERING GROUP A lr!!rracon COMPANY Shaft drilling through the native clay is not expected to be difficult based upon the material encountered within the borings. However, special drilling techniques may be required to penetrate shale and siltstone formational mateiral. Rock excavation will be required to construct drilled shafts at this site. Specialized drilling and use of rock bits andlor core barrels should be anticipated to advance drilled shafts within the onsite bedrock. Unit rates for rock excavation should be provided by the contractor. Although groundwater was not encountered in the exploratory test boring drilled for this report, groundwater could be encountered during shaft drilling. Therefore, temporary casing may be needed to advance drilled shaft excavations. Temporary casing should be installed when personnel enter the shafts to clean andlor test the bearing surface. The bottom of the shaft excavations should be cleaned of any water and loose material before placing reinforcing steel and concrete. A minimum shaft diameter of at least 30 inches is required for entry of construction and testing personnel, and to facilitate clean-out and possible dewatering of the shaft excavation. Concrete should be placed soon after excavating to minimize bearing surface disturbance. It is recommended the geotechnical engineer be retained to observe and test the foundation bearing materials. Any water accumulating in the shaft excavation should be pumped from the excavation or the water level should be allowed to stabilize and then concrete should be placed using the tremie method. If concrete will be placed as the temporary casing is being removed, we recommend the concrete mixture be designed with a slump of about 5 to 7 inches to reduce the potential for arching when removing the casing. While removing the casing from a shaft excavation during concrete placement, the concrete inside the casing should be maintained at a sufficient level to resist any earth and hydrostatic pressures outside the casing during the entire casing removal procedure. Although obvious signs of harmful gases such as methane, carbon monoxide, etc., were not noted in the boring during the drilling operations, gas could be encountered in the drilled shaft excavations during construction. The contractor should check for gas andlor oxygen deficiency prior to any workers entering the excavation for observation and manual cleanup. We recommend that a representative of Terracon be present during drilling activities to evaluate the materials removed from the drilled shaft excavations to determine when adequate capacity has been developed, to observe the base of the drilled shaft to determine that the cuttings have been adequately removed , and also to observe the concreting techniques. Reliable . Responsive . Convenient . Innovative 12 Geotechnical Engineering Report Williams 80 Ft Communication Tower . Garfield County, Colorado June 20, 2011 • Terracon Project No. AD114029 5,4 Footing Foundations ~'I I GEOTECHNICAL ENGINEERING GROUP A lrcmacon COMPANY As an alternate to support of the tower on deep foundations, if the owner is willing to assume the risk of supporting the foundations on shallow clay soils, the proposed structure can be supported using a shallow spread footing foundation system bearing on new engineered fill extending 2 feet below the new footing bearing elevations. Design recommendations for shallow foundations for the proposed structures are presented in the following sections. 5.4.1 Footing Foundation Design Recommendations DESCRIPTION I Net allowable bearing pressure 1 Minimum dimensions Minimum embedment below finished grade for frost protection 2 Column 1,500 psf 30 inches 42 inches Approximate total settlement from foundation loads About y. to 1 when supported on a minimum of 2 feet thickness of Well Compacted Engineered fill 3 Allowable passive pressure 4 275 psf Ultimate coefficient of sliding friction 4 0.3 1. The recommended net allowable bearing pressure is the pressure in excess of the minimum surrounding overburden pressure at the footing base elevation. Assumes any unsuitable fill or soft soils, if encountered, will be undercut and replaced with compacted structural fill. Based upon a Factor of Safety of 3. 2. And to reduce the effects of seasonal moisture variations in the subgrade soils. For perimeter footing and footings beneath unheated areas. 3. Even with the testing and observation discussed in this report, total settlement of footings supported over the existing fill cannot be accurately predicted and could be larger than normal. 4. If passive resistance is used to resist lateral loads, the base friction should be neglected. 5.4,2 Footing Foundation Construction Considerations The base of all foundation excavations should be free of water and loose soil and rock prior to placing concrete. The bottom of the foundation excavation should be scarified a minimum 10 inches, moisture conditioned to within 2 percent of optimum moisture content and compacted to at least 95 percent of the maximum standard Proctor (ASTM D 698) dry density. Concrete should be placed soon after excavating to reduce bearing soil disturbance. Should the soils at bearing level become excessively dry, disturbed or saturated, or frozen, the affected soil should be removed prior to placing concrete. Place a lean concrete mud-mat over the bearing soils if the excavations must remain open over night or for an extended period of time. It is recommended that the geotechnical engineer be retained to observe and test the soil foundation bearing materials. Relinblc _ Responsive . Convenient . Innovative 13 ) ) ) ) Geotechnical Engineering Report Williams 80 Ft Communication Tower _ Garfield County, Colorado June 20, 2011 _ Terracon Project No. AD114029 ~' I I GEOTECHNICAL ENGINEEr-l ING GROUP A lrClrracon COMPANY Although not encountered in the borings, some surface and/or perched groundwater may enter foundation excavations during construction. It is anticipated any water entering foundation excavations from these sources can be removed using sump pumps or gravity drainage. If unsuitable bearing soils are encountered in footing excavations, the excavation could be extended deeper to suitable soils and the footing could bear directly on these soils at the lower level or the footings could bear on properly compacted structural backfill extending down to the suitable soils. Overexcavation for compacted structural fill placement below footings should extend laterally beyond all edges of the footings at least 8 inches per foot of overexcavation depth below footing base elevation. The overexcavation should then be backfilled up to the footing base elevation with well graded granular material placed in lifts of 9 inches or less in loose thickness (6 inches or less if using hand-guided compaction equipment) and compacted to at least 98 percent of the material's standard effort maximum dry density (ASTM 0698). The overexcavation and backfill procedure is described in the following figure. DesWJn Footn"IQ l£'vel Recommended E'cavJ!lon l e~el COMPACTED STRUCTURAL FILL Overexcavation /Backfill 5.5 Seismic Considerations Code Used Site Classification 2009 International Building Code (IBC) 1 C2 1. In general accordance with the 2009 International Building Code, Table 1613.5.2. 2. The 2009 International Building Code requires a site soil profile determination extending a depth of 100 feet for seismic site classification. The current scope requested does not include the required 100 foot soil profile determination. Boring for this report extended to a maximum depth of approximately 25 feet and this seismic site class assignment considers that the shale and siltstone bedrock continues below the maximum depth of the subsurface exploration. Additional exploration to greater depths could be considered to confirm the conditions below the current depth of exploration, or a geophysical exploration could be utilized to attempt to justify a more favorable seismic site class. Reliable _ Rc~p on s i ve _ Convenient _ Innovative 14 Geotechnical Engineering Report Williams 80 Ft Communication Tower . Garfield County, Colorado June 20, 2011 • Terracon Project No. AD114029 ~' I I GEOTECHNICAL ENGINEERING GROUP A' rerracon COMPANY 5.6 Floor Slab We understand that as currently planned concrete slab on grade floors will not be include in the proposed tower construction. If in the future plans are changed to include concrete floor slabs on grade we should be contacted to provide geotechnical recommendations for design and construction of concrete slab on grade floors. 5.7 Lateral Earth Pressures Reinforced concrete walls with unbalanced backfill levels on opposite sides should be designed for earth pressures at least equal to those indicated in the following table. Earth pressures will be influenced by structural design of the walls, conditions of wall restraint, methods of construction and/or compaction and the strength of the materials being restrained . Two wall restraint conditions are shown. Active earth pressure is commonly used for design of free-standing cantilever retaining walls and assumes wall movement. The "at-rest" condition assumes no wall movement. The recommended design lateral earth pressures do not include a factor of safety and do not provide for possible hydrostatic pressure on the walls. Horizontal Finished Grade S = Surcharge H For active pressure movement (0.002 H to 0.004 H) For at-rest pressure -No Movement Assumed Horizontal Finished Grade Retaining Wall Earth Pressure Coefficients Earth Pressure Backfill Type Equivalent Fluid I Surcharge I Earth Pressure, Conditions Density (pet) Pressure, p, (pst) P2 (pst) Active (Ka) Onsite Clay 50 (0.33)8 (50)H At-Rest (Ko) On site Clay 70 (0.46)8 (70)H Passive (Kp) Onsite Clay 275 Reli'lble . ResponsIve _ Convenient . Innovative 15 ) Geotechnical Engineering Report Williams 80 Ft Communication Tower . Garfield County, Colorado June 20, 2011 • Terracon Project No. AD114029 Applicable conditions to the above include: ~' I I GEOTECHNICAL ENG I NEEf.~ING GROUP A lrcmacon COMPANY • For active earth pressure, wall must rotate about base, with top lateral movements of about 0.02 H to 0.05 H, where H is wall height • For passive earth pressure to develop, wall must move horizontally to mobilize resistance • Uniform surcharge, where S is surcharge pressure • In-situ soil backfill weight a maximum of 120 pcf • Horizontal backfill, compacted between 95 and 98 percent of standard Proctor maximum dry density • Loading from heavy compaction equipment not included • No hydrostatic pressures acting on wall • No dynamic loading • No safety factor included in soil parameters • Ignore passive pressure in frost zone Backfill placed against structures should consist of granular soils or low plasticity cohesive soils. For the granular values to be valid, the granular backfill must extend out from the base of the wall at an angle of at least 45 and 60 degrees from vertical for the active and passive cases, respectively. To calculate the resistance to sliding, a value of 0.30 should be used as the ultimate coefficient of friction between the footing and the underlying soil. A perforated rigid plastic or metal drain line installed behind the base of walls that extend below adjacent grade is recommended to prevent hydrostatic loading on the walls. The invert of a drain line around a below-grade building area or exterior retaining wall should be placed near foundation bearing level. The drain line should be sloped to provide positive gravity drainage or to a sump pit and pump. The drain line should be surrounded by clean, free-draining granular material having less than 5 percent passing the No. 200 sieve. The free-draining aggregate should be encapsulated in a filter fabric. The granular fill should extend to within 2 feet of final grade, where it should be capped with compacted cohesive fill to reduce infiltration of surface water into the drain system. Reliable _ Responsive _ Convenient _ InnoY[ltlve 16 Geotechnical Engineering Report Williams 80 Ft Communication Tower _ Garfield County, Colorado June 20, 2011 _ Terracon Project No. AD114029 ~II I GEOTECHNICAL ENGINEERING GROUP A lrerracon COMPANY layer of cohesive fill Foundation wall ./Slope to drain /away from building t-__. .J1t·. .-L.-/..tt .__ ..... T-. '>.; ·; ., r---/~.; . -1----Ba~flll (see report .".' .', ~-.' ._-----reqUIrements) Free-::Iraining graded • . " granular iller material or . :: .• . "\ non-graded free· draining • ~ .-' I material encapsulated in · I an appropriate filter ;~ ~ ~ ~ ~ \ ~ NCllive. undisturbed fab ric (see report) _( . _. _, '\ ~.. 5011 or engineered fill ,-----.L....L...:-,' .. ~\ /L ____ --'-~ Perforated drain pipe (Rigid PVC -unless stated otherwise in report) As an alternative to free-draining granular fill, a pre-fabricated drainage structure may be used. A pre-fabricated drainage structure is a plastic drainage core or mesh which is covered with filter fabric to prevent soil intrusion, and is fastened to the wall prior to placing backfill. If controlling hydrostatic pressure behind the wall as described above is not possible, then combined hydrostatic and lateral earth pressures should be calculated for lean clay backfill using an equivalent fluid weighing 90 and 100 pcf for active and at-rest conditions, respectively. For granular backfill, an equivalent fluid weighing 85 and 90 pet should be used for active and at-rest, respectively. These pressures do not include the influence of surcharge, equipment or pavement loading, which should be added. Heavy equipment should not operate within a distance closer than the exposed height of retaining walls to prevent lateral pressures more than those provided. 6,0 GENERAL COMMENTS Terracon should be retained to review the final design plans and specifications so comments can be made regarding interpretation and implementation of our geotechnical recommendations in the design and specifications. Terracon also should be retained to provide observation and testing services during grading, excavation, foundation construction and other earth-related construction phases of the project. The analysis and recommendations presented in this report are based upon the data obtained from the borings performed at the indicated locations and from other information discussed in this report. This report does not reflect variations that may occur between borings, across the site, or due to the modifying effects of construction or weather. The nature and extent of such variations may not become evident until during or after construction. If variations appear, we Reliable _ Responsive . Co nvenient _ Innovative 17 ) ) ) Geotechnical Engineering Report Williams 80 Ft Communication Tower . Garfield County, Colorado June 20, 2011 • Terracon Project No. AD114029 ~' I I GEOTECHNICAL ENGINEERING GROUP A lrerracon COMPANY should be immediately notified so that further evaluation and supplemental recommendations can be provided. The scope of services for this project does not include either specifically or by implication any environmental or biological (e.g., mold, fungi, bacteria) assessment of the site or identification or prevention of pollutants, hazardous materials or conditions. If the owner is concerned about the potential for such contamination or pollution, other studies should be undertaken. This report has been prepared for the exclusive use of our client for specific application to the project discussed and has been prepared in accordance with generally accepted geotechnical engineering practices. No warranties, either express or implied, are intended or made. Site safety, excavation support, and dewatering requirements are the responsibility of others. In the event that changes in the nature, design, or location of the project as outlined in this report are planned, the conclusions and recommendations contained in this report shall not be considered valid unless Terracon reviews the changes and either verifies or modifies the conclusions of this report in writing. Rf'IiClhle • R('spon~ive • Convenient . Innovative 18 APPENDIX A FIELD EXPLORA liON Subject site ------.. GEG JOB NO. AD114029 4000' 2000' 0 2000' 4000' ~ Graphic scale Vicinity Map Williams 80 foot Communication Tower Garfield County, Colorado OS/27111 Fig. A· l Note: This figure was prepared based on USDA NAIP imagery and notes obtained during our field study and and is intended to show approximate locations of Exploratory Test Borings only. TH-l • 200' 100' i Graphic Legend Indicates approximate locations of Exploratory Test Borings o 100' 200' i scale Exploratory Test Bore Locations Williams 80 foot Communication Tower Garfield County, Colorado GEGJOBNO. AD114029 ) ) OS/27/11 Fig. A-2 ) ) Geotechnical Engineering Report Williams 80 FI Communication Tower . Garfield County, Colorado June 20, 2011 . Terracon Project No. AD114029 Field Exploration Description ~' I I GEOTECHNICAL ENGINEERING GROUP A lrerracon COMPANY The proposed boring locations were laid out in the field by a Terracon engineer using a scaled site plan provided by the client and measuring from available site features. Ground surface elevations indicated on the boring logs were measured in the field using a surveyor's level and grade rod. The elevations are referenced to the top of the manhole located near the proposed site entrance, and are rounded to the nearest Y, foot. This temporary benchmark was assigned an elevation of 100.0 feet. The locations and elevations of the borings should be considered accurate only to the degree implied by the means and methods used to define them . The borings were drilled with a truck-mounted rotary drill rig using continuous flight solid-stem augers to advance the boreholes. Samples of the soil encountered in the borings were obtained using the split-barrel and thin-wa lled tube sampling procedures. In the split-barrel sampling procedure, the number of blows required to advance a standard 2-inch 0.0. split-barrel sampler the last 12 inches of the typical total 18-inch penetration by means of a 140-pound hammer with a free fall of 30 inches, is the standard penetration resistance value (SPT -N). This value is used to estimate the in-situ relative density of cohesion less soils and consistency of cohesive soils. A CME automatic SPT hammer was used to advance the split-barrel sampler in the borings performed on this site. A significantly greater efficiency is achieved with the automatic hammer compared to the conventional safety hammer operated with a cathead and rope. This higher efficiency has an appreciable effect on the SPT-N value. The effect of the automatic hammer's efficiency has been considered in the interpretation and analysis of the subsurface information for this report. In the thin-walled tube sampling procedure, a thin-walled, seamless steel tube with a sharp cutting edge is pushed hydraulically in to the soil to obtain a relatively undisturbed sample. The samples were tagged for identification, sealed to reduce moisture loss, and taken to our laboratory for further examination, testing, and classification. Information provided on the boring logs attached to this report includes soil descriptions, consistency evaluations, boring depths, sampling intervals, and groundwater conditions. The borings were backfilled with auger cuttings prior to the drill crew leaving the site. A field log of each boring was prepared by the drill crew. These logs included visual classifications of the materials encountered during drilling as well as the driller's interpretation of the subsurface conditions between samples. Final boring logs included with this report represent the engineer's interpretation of the field logs and include modifications based on laboratory observation and tests of the samples. Reliable . Responsive _ Convenient . Illnovotive Figure A-3 .11erracan COIIIPA.HV KEY TO SYMBOLS Symbol Notes: Description Clay, very silty, gravelly, cobbles, soft, moist, brown to black (CS) Inter1ayered Shale adn Siltstone, very hard, moist, variogated color brown/gray/red (CLS-MLS) 1. SH -Thinwa11 Tube Sample. 2. CT -Modified California Barrel Sample. 3. SPT -Standard Split Barrel Sample. 4. Bulk -Bulk Disturbed Sample. 5. 17/12 -Indicates 17 Blows with a 140 LB hammer falling 30 inches was required to drive the sample 12 inches. 6. Exploratory test pits were excavated on 5/25/11 using a 4-inch diameter continuous flight power auger. 7. These logs are subject to the encountered and limitations, re ort. interpretation by GEG of the soils conclusions, and recommendations in this A lletracon COIIPAHY PROJECT: Williams 80 foot tower CLIENT: ThinAir Communications PROJECT NO.: ADI14029 LOCATION: "'S"'ee""F""ig".'. .cA"'-2=---______________ ELEVATION: ______ LOG OF iTEST BORING TH-1 DRILLER: GEG LOGGED BY: __ -"S,-P _ DEPTH TO WATER> INITIAL: ¥ NE AFTER 24 HOURS: ~ _____ _ DATE: 5125/11 DEPTH TO CAVING: L o 5 Description Clay, very silty, gravelly, cobbles, soft, moist, brown to black (CS) Organics noted to one foot. 10 Interlayered Shale and Siltstone, very hard, moist, variogated color brown/gray/red (CLS-MLS) 15 20 25 Bottom of boring when terminated: 25 ft. 30 35 50/2 PT 50/3 50/3 Notes This information ertains onl to this borin and should not be inter reted as bein indicitive of the site. APPENDIX B LABORATORY TESTING ) ) Geotechnical Engineering Report Williams 80 Ft Communication Tower . Garfield County, Colorado June 20, 2011 • Terracon Project NO.AD114029 Laboratory Testing "'IIlI'11 GEOTECHNICAL ENGINEERING GROUP A lrerracon COMPANY Soil samples were tested in the laboratory to measure their dry unit weight and natural water content. Swell/Consolidation tests of select samples were conducted to estimate soil response to loading and wetting of the samples tested. Direct Shear Strength tests were performed on selected samples to estimate the approximate soil strength characteristics of the samples tested. The test results are included in Appendix B. Descriptive classifications of the soils indicated on the boring logs are in accordance with the enclosed General Notes and the Unified Soil Classification System. Also shown are estimated Unified Soil Classification Symbols. A brief description of this classification system is attached to this report. All classification was by visual manual procedures. Selected samples were further classified using the results of Atterberg limit testing. The Atterberg limit test results are also provided on the boring logs. Reliable _ Responsive . Conve nient . Innovative Figure B-1 ""I11III,, ' GEOTECHNICAL , ENGINEERING GROUP A lrerracon COMPANY Job No, AD114029 TABLE B-1 SUMMARY OF LABORATORY TEST RESULTS Hole Depth Natural Dry Atterberg limits Swell I Consolidation Direct Shear Passing Water Soil Type (feet) Moisture Density No. 200 Soluble ('!o) (pet) Liquid Plasticity Swell Confining Estimated Internal Cohesion Sieve Sulfates Limit Index ('!o) Pressure Swell Angle of (pst) (%) (ppm) ('!o) ('!o) (pst) Pressure Friction (pst) (Degrees) TH-1 4 18.5 85 ---0.0 250 NA --------Clay, gravelly (Cl) TH-1 5 29,5 --------------120 Clay, qravelly (Cl) TH-1 9 20.5 65 --------24 475 ---Shale/Siltstone (CLS-MLS) TH-1 14 22.6 ------+0.2 250 1,000 --------Shale/Siltstone (CLS-MLS Page 1 of 1 CONSOLIDATION TEST REPORT ·1 . ~ ..... " --n---WATER ADDED ~ 3 "-~ 5 ~ 7 -c .~ 1i5 c 9 Q) E Q) 0.. 11 13 15 17 19 100 200 500 1000 2000 5000 Applied Pressure -psI Natural Dry Dens. LL PI Sp. Overburden Pc Cc Cr Swell Press. Swell eo Sat. Moist. (pcf) Gr. (psI) (psI) (psI) % 52.0 % 18.5 % 85.1 2.65 0 0.05 0.943 MATERIAL DESCRIPTION USCS AASHTO Project No. ADl14029 Client: ThinAir Communications Remarks: Project: Williams 80 foot tower Source: TH· I Elev./Depth: 4 Terracon, Inc. Grand Junction, Colorado Figure B-2 CONSOLIDATION TEST REPORT -1 I (--""" 0 ---------WATER ADDED \ 1 \ 2 \\ 3 ~ c '~ iii "E 4 Q) -.............. , !:! aQ.) -: 5 6 I i , 7 . 8 .. . 9 100 200 500 1000 2000 5000 Applied Pressure -pst Natural Dry Dens. LL PI Sp. Overburden Pc Cc Cr Swell Press. Swell Sat. Moist. (pcf) Gr. (pst) (pst) (pst) % eo 22.6% 186.4 2.65 10 0.02 1000 0.2 MATERIAL DESCRIPTION USCS AASHTO Project No. AD 114029 Client: ThinAir Communications Remarks: Project: Williams 80 foot tower Source: TH-l Elev./Depth: 14 Terracon, Inc. Grand Junction, Colorado Figure B·3 -0.012 .'-+ 15 i' Results 1-H-+-: , ;-t-C, psi 3.41 _. ! -. $, deg 24.3 f-+J + -0.008 , t-' +-c. --1-Tan($) 0.45 '-t-:-+r+ , H .£ -. f---;-c, -0.004 ++ I 10 g 'iii f+ -Dilation .-~ Cl. , -+-ro I E -'-vi '" r+-i-i '. -~+t:P .Q 0 [I> Q) I 3 1i5 f-c-L--. I 0 1>11 iii Gonaol 'ffi I -I , .\1 ~k 2 LL J1----j t:: 0.004 ~ Q) > --, r-.-. !-i-, i -++-rrl + I -, 0.008 , 1 -~--.L...c.... \, ,-+ i+ 0.012 , 0 0 3.5 7 10.5 14 0 5 10 15 Strain, % Normal Stress, psi 30 -i-f-L Sample No. 2 I 1 3 L , I Water Content, % 20.5 20.5 20.5 25 i Dry Density, pef 64.8 64.8 64.8 -. iii Saturation, % 35.0 35.0 35.0 1---, :ti i-e 20 -Void Ratio 1.5526 1.5526 1.5526 'iii -, Cl. Diameter, in. 1.83 1.83 1.83 vi -J "/: I 2 '" , , 1 Heiaht, in. l.71 1.71 l.71 ~ I 15 , I Water Content, % N/A N/A N/A ~ rQo) I Dry Density, pcf .c 1ii (f) 10 3 Q) Saturation, % ~ t-« Void Ratio /' '-Diameter, in. 5 , , Heiaht, in. F-: +--'-Normal Stress, psi 10.40 6.90 3.50 0'-'---Fail. Stress, psi 8.09 6.51 4.99 0 5 10 15 20 Strain, % 3.8 l.l 2.7 Strain, % Ult. Stress, psi Strain, % Strain rate, in.imin. 0.63 0.63 0.63 Sample Type: Client: ThinAir Communications Description: Project: Williams 80 foot tower Assumed Specific Gravity= 2.65 Source of Sample: TH-l Depth: 9 Remarks: Proj. No.: ADl14029 Date Sampled: DIRECT SHEAR TEST REPORT Terracon, Inc. Figure B-4 Grand Junction Colorado APPENDIX C SUPPORTING DOCUMENTS GENERAL NOTES DRILLING & SAMPLING SYMBOLS: ) 55: Split Spoon -1_3/a" 1.0., 2" 0.0., unless otherwise noted ST: Thin-Walled Tube -2" 0.0., 3" 0.0., unless otherwise noted RS: Ring Sampler -2.42" 1.0., 3" 0.0., unless otherwise noted DB: Diamond Bit Coring -4", N, B BS: Bulk Sample or Auger Sample HS: PA: HA: RB: WB Hollow Stem Auger Power Auger (Solid Stem) Hand Auger Rock Bit Wash Boring or Mud Rotary The number of blows required to advance a standard 2-inch 0.0. split-spoon sampler (55) the last 12 inches of the total 18-inch penetration with a 140-pound hammer falling 30 inches is considered the "Standard Penetration" or "N-value". WATER LEVEL MEASUREMENT SYMBOLS: WL: Water Level WS: WCI: Wet Cave in WD: DCI: Dry Cave in AB: While Sampling While Drilling After Boring BCR: ACR: N/E: Before Casing Removal After Casing Removal Not Encountered Water levels indicated on the boring logs are the levels measured in the borings at the times indicated. Groundwater levels at other times and other locations across the site could vary. In pervious soils, the indicated levels may reflect the location of groundwater. In low permeability soils, the accurate determination of groundwater levels may not be possible with only short-term observations. DESCRIPTIVE SOIL CLASSIFICATION: Soil classification is based on the Unified Soil Classification System. Coarse Grained Soils have more than 50% of their dry weight retained on a #200 sieve; their principal descriptors are: boulders, cobbles, gravel or sand. Fine Grained Soils have less than 50% of their dry weight retained on a #200 sieve; they are principally described as clays if they are plastic, and silts if they are slightly plastic or non-plastic. Major constituents may be added as modifiers and minor constituents may be added according to the relative proportions based on grain size. In addition to gradation, coarse-grained soils are defined on the basis of their in-place relative density and fine-grained soils on the basis of their consistency. CONSISTENCY OF FINE-GRAINED SOILS Unconfined Compressive Strength. Qu. pst < 500 Standard Penetration or N-value (55) Consistency 500 -1,000 1,000 -2,000 2,000 -4,000 4,000 -8,000 8,000+ BlowslFt. 0-1 2-4 4-8 8 -15 15 -30 > 30 Very Soft Soft Medium Stiff Stiff Very Stiff Hard RELATIVE PROPORTIONS OF SAND AND GRAVEL Descriptive Term(s) of other constituents Trace With Modifier Percent of Dry Weight < 15 15 -29 ~ 30 RELATIVE PROPORTIONS OF FINES Descriptive Term(s) of other constituents Trace With Modifier Percent of Dry Weight <5 5 -12 > 12 RELATIVE DENSITY OF COARSE-GRAINED SOILS Standard Penetration or N-value (SS) BlowslFt. 0-3 4-9 10-29 30-50 > 50 Relative Density Very Loose Loose Medium Dense Dense Very Dense GRAIN SIZE TERMINOLOGY Major Component of Sample Boulders Cobbles Gravel Sand Silt or Clay particle Size Over 12 in. (300mm) 12 in. to 3 in. (300mm to 75mm) 3 in. to #4 sieve (75mm to 4.75mm) #4 to #200 sieve (4.75 to 0.075mm) Passing #200 Sieve (0.075mm) PLASTICITY DESCRIPTION Term Plasticity Index Non-plastic 0 Low 1-10 Medium 11-30 High > 30 Exhibit C-1 UNIFIED SOIL CLASSIFICATION SYSTEM , Soil Classification Criteria for Assigning Group Symbols and Group Names Using Laboratory Tests A Group Symbol: Group Name B Gravels: Clean Gravels: Cu>4and 1 ~CC"';3E GW Well-graded gravel F More than 50% of Less than 5% fines C Cu < 4 and/or 1 > Cc > 3 E GP Poorly graded gravel F coarse Gravels with Fines: Fines classify as ML or MH GM Silty gravel F,G. H Coarse Grained Soils: fraction retained on More than 12% fines C Fines classify as CL or CH GC Clayey gravel F,G,H More than 50% retained No.4 sieve on No. 200 sieve Sands; Clean Sands: Cu>6and 1 <Cc<3 E SW Well-graded sand I 50% or more of coarse Less than 5% fines 0 Cu < 6 andlor 1> Cc > 3 E SP Poorly graded sand I fraction passes Sands with Fines: Fines classify as ML or MH SM Silty sand G,H,I No.4 sieve More than 12% fines 0 Fines Classify as CL or CH SC Clayey sand G,H,I PI > 7 and plots on or above "A" line J CL Lean clay K,l,M Silts and Clays: Inorganic: PI < 4 or plots below "A" line J ML SiltK.L,M Liquid limit less than 50 Organic: Liquid limit -oven dried < 0.75 OL Organic clay K,l,M,N Fine-Grained Soils: Liquid limit -not dried , Organic silt K,L,M.O 50% or more passes the PI plots on or above "A" line CH : Fat clayK,L,M No, 200 sieve Sills and Clays: Inorganic: PI plots below "A" line MH Elastic Silt K,l,M Liquid limit 50 or more Organic: Liquid limit -oven dried < 0,75 OH Organic clay K,l,M,P Liquid limit -not dried : Organic silt K.L,M.Q Highly organic soils: Primarily organic matter, dark in color, and organic odor PT ' Peat A Based on the material passing the 3-in, (75-mm) sieve H If fines are organic, add "with organic fines" to group name. B If field sample contained cobbles or boulders, or both, add "with cobbles I If soil contains ~ 15% gravel, add "with gravel" to group name. or boulders, or both" to group name. J If Atterberg limits plot in shaded area, soil is a CL-ML, silty clay. C Gravels with 5 to 12% fines require dual symbols: GW-GM well-graded K If soil contains 15 to 29% plus No. 200, add "with sand" or "with gravel with silt, GW-GC well-graded gravel with clay, GP-GM poorly gravel," whichever is predominant. graded gravel with silt, GP-GC poorly graded gravel with clay. L If soil contains 2': 30% plus No. 200 predominantly sand, add "sandy" D Sands with 5 to 12% fines require dual symbols: SW-SM well-graded to group name. sand with silt, SW-SC well-graded sand with clay, SP-SM poorly graded M If soil contains 2': 30% plus No. 200, predominantly gravel. add sand with silt, SP-SC poorly graded sand with clay "gravelly" to group name, (030 )' N PI;::o: 4 and plots on or above "A" line, E Cu = D6ofD1O Cc= o PI < 4 or plots below "A" line. D10 x 060 P PI plots on or above "A" line. F If soil contains 2': 15% sand, add "with sand" to group name. o PI plots below "A" line, G If fines classify as CL-ML, use dual symbol GC-GM, or SC-SM. 60 , , For classification of fine-grained , , soils and fine-grained fraclion , , , 50 of coarse-grained soils ,~e./. 'r-0 -:5 v' ' .V Equation of "A" -Hne .> ",,' ,~ ~ Horizontal at PI=4 to LL=25.5. , , X 40 then PI=0.73 (LL-2J) , , O~ , W Equation of "U" -line , 0' Cl , , Z Vertical at LL=16 to PI=7, , , V~ >-30 then PI=0.9 (LL-S) /, I-l5 ,/' 0" i= //(f) 20 :5 MH orOH CL to 7 ---/-7 _MI /MLorOL 4 --I 0 I 0 10 16 20 30 40 50 60 70 80 90 100 110 LIQUID LIMIT (ll) Exhibit C-2 WEATHERING Fresh Very slight Slight Moderate Moderately severe Severe Very severe Complete GENERAL NOTES Description of Rock Properties Rock fresh, crystals bright, few joints may show slight staining. Rock rings under hammer if crystalline. Rock generally fresh, jOints stained, some joints may show thin clay coatings, crystals in broken face show bright. Rock rings under hammer if crystalline. Rock generally fresh, joints stained, and discoloration extends into rock up to 1 in. Joints may contain clay. In granitoid rocks some occasional feldspar crystals are dull and discolored. Crystalline rocks ring under hammer. Significant portions of rock show discoloration and weathering effects. In granitoid rocks, most feldspars are dull and discolored; some show clayey. Rock has dull sound under hammer and shows significant loss of strength as compared with fresh rock. All rock except quartz discolored or stained. In granitoid rocks, all feldspars dull and discolored and majority show kaolinization. Rock shows severe loss of strength and can be excavated with geologist's pick. All rock except quartz discolored or stained. Rock "fabric" clear and evident, but reduced in strength to strong soil. In granitoid rocks, all feldspars kaolinized to some extent. Some fragments of strong rock usually left. All rock except quartz discolored or stained. Rock "fabric" discernible, but mass effectively reduced to "soil" with only fragments of strong rock remaining. Rock reduced to "soil". Rock "fabric" not discernible or discernible only in small, scattered locations. Quartz may be present as dikes or stringers. HARDNESS (for engineering description of rock -not to be confused with Moh's scale for minerals) Very hard Cannot be scratched with knife or sharp pick. Breaking of hand specimens requires several hard blows of geologist's pick. Hard Moderately hard Can be scratched with knife or pick only with difficulty. Hard blow of hammer required to detach hand specimen. Can be scratched with knife or pick. Gouges or grooves to Y. in. deep can be excavated by hard blow of point of a geologist's pick. Hand specimens can be detached by moderate blow. Medium Can be grooved or gouged 1/16 in. deep by firm pressure on knife or pick point. Can be excavated in small chips to pieces about 1-in. maximum size by hard blows of the point of a geologist's pick. Soft Can be gouged or grooved readily with knife or pick point. Can be excavated in chips to pieces several inches in size by moderate blows of a pick point. Small thin pieces can be broken by finger pressure. Very soft Can be carved with knife. Can be excavated readily with point of pick. Pieces 1-in. or more in thickness can be broken with finger pressure. Can be scratched readily by fingernail. JOint, Bedding and Foliation Spacing in Rock' Spacing Joints Bedding/Foliation Less than 2 in. Very close Very thin 2 in. -1 ft. Close Thin 1 ft. -3 ft. Moderately close Medium 3 ft. -10ft. Wide Thick More than 10ft. Very wide Very thick Rock Quality Designator (RQD) , Joint Openness Descriptors RQD, as a percentage Diagnostic description Openness Descriptor Exceeding 90 Excellent No Visible Separation Tight 90-75 Good Less than 1/32 in. Slightly Open 75-50 Fair 1/32 to 1/8 in. Moderately Open 50-25 Poor 1/8 to 3/8 in. Open Less than 25 Very poor 3/8 in. to 0.1 ft. Moderately Wide Greater than 0.1 ft. Wide a. Spacing refers to the distance normal to the planes, of the desCribed feature, which are parallel to each other or nearly so. b. ROD (given as a percentage) = length of core in pieces 4 in. and longer/length of run. References: American Society of Civil Engineers. Manuals and Reports on Engineering Practice -No. 56. Subsurface Investigation for Design and Construction of Foundations of Buildings. New York: American Society of Civil Engineers, 1976. U.S. Department of the Interior, Bureau of Reclamation, Engineering Geology Field Manual. Exhibit C-3 ) ) ~' II GEOTECHNICAL ENGINEERIN G GROUP A lrerrCII:on COMPANY June 21, 2011 ThinAir Communications 27473 Forest Ridge Drive Kiowa, Colorado 80117 Attention: Mr. Philip Sprouse Subject: Geotechnical Engineering Report Addendum 1 Williams 80 Ft Communication Tower Garfiled County, Colorado Terracon Project Number: AD114029 Dear Mr. Sprouse, The purpose of this addendum is in response to your June 27, 2011 request for foundation recommendations for the proposed communications building at the subject project. In order to formulate these responses, we reviewed "Geotechnical Engineering Report, Williams 80 Ft Communication Tower, Garfield County, Colorado, GEG job number AD114029, dated June 20,2011. We understand the proposed tower construction will include a communication building. The proposed building will be 10 feet by 16 feet, wood frame superstructure. The floor will be a structural floor supported on the foundation system. The preferred foundation is a turned down concrete slab on grade mat foundation. Turned Down Mat Foundations If the owner is willing to assume an increased risk of movement and damage (over deep foundations such as drilled piers), the foundations may be supported using a shallow turned down mat foundation system bearing on new engineered fill extending 2 feet below the new foundation bearing elevations. Design recommendations for shallow foundations for the proposed structures are presented in the following sections. Geotechn ical Eng ineering Group, A Terracon Company 2308 Interstate Avenue Grand Jun ct ion, CO 81505 P [97012454078 F [97012457115 geotechnicalg roup.com te rracon .com Geotechnica l • Environmental • Construction Materials • Facilities """11 GEOTECHNICAL ENGINUO:RING LiI~[JUI-' A lrcm~tOn COMPANY Turned Down Mat Foundation Design Recommendations DESCRIPTION Net allowable bearing pressure 1 Minimum embedment below finished grade for frost protection 2 Approximate total settlement from foundation loads Allowable passive pressure 4 Ultimate coefficient of sliding friction 4 Column 1,500 psf 42 inches About Yo to 1 inch when supported on a minimum of 2 feet th ickness of Well Compacted Engineered fi ll 3 275 psf 0.3 1. The recommended net allowable bearing pressure is the pressure in excess of the minimum surrounding overburden pressu re at the footing base elevation. Assumes any unsuitable fi ll or soft soils, if encountered, will be undercut and replaced with compacted structural fill. Based upon a Factor of Safety of 3. 2. And to reduce th e effects of seasona l moisture variations in the subgrade soils. For perimeter footin g and footings beneath unheated areas. 3. Even with the testing and observation discussed in t his report, total settlement of footings supported over the existing fill cannot be accurately predicted and could be larger than normal. 4. If passive resistance is used to resist lateral loads, the base friction should be neglected. Foundation Construction Considerations The base of all foundation excavations should be free of water and loose soil and rock prior to placing concrete. The bottom of the foundation excavation should be scarified a minimum 10 inches, moisture conditioned to within 2 percent of optimum moisture content and compacted to at least 95 percent of the maximum standard Proctor (ASTM D 698) dry density. Concrete should be placed soon after excavating to reduce bearing soil disturbance. Should the soils at bearing level become excessively dry, disturbed or saturated, or frozen, the affected soil should be removed prior to placing concrete. Place a lean concrete mud-mat over the bearing soils if the excavations must remain open over night or for an extended period of time. It is recommended that the geotechnical engineer be retained to observe and test the soil foundation bearing materials. Williams 80 Ft Communication Tower. Addendum 1 Garfield County, Colorado June 27, 2011 GEG Job No. AD114029 2 ) ) ~' I I GEOTECHNICAL ENGINEU<ING GROUP A l r!!rr.'II:on COMPANY Although not encountered in the borings, some surface and/or perched groundwater may enter foundation excavations during construction. It is anticipated any water entering foundation excavations from these sources can be removed using sump pumps or gravity drainage. If unsuitable bearing soils are encountered in footing excavations, the excavation could be extended deeper to suitable soils and the footing could bear directly on these soils at the lower level or the footings could bear on properly compacted structural backfill extending down to the suitable soils. Overexcavation for compacted structural fill placement below footings should extend laterally beyond all edges of the footings at least 8 inches per foot of overexcavation depth below footing base elevation. The overexcavation should then be backfilled up to the footing base elevation with well graded granular material placed in lifts of 9 inches or less in loose thickness (6 inches or less if using hand-guided compaction equipment) and compacted to at least 98 percent of the material's standard effort maximum dry density (ASTM 0 698). The overexcavation and backfill procedure is described in the following figure. = 1= = DeslOn Footlll9level Recommended Ex.cavation Level COMPACTED STRUCTURAL Fill Overexcavation /Backfill Williams 80 Ft Communication Tower, Addendum 1 Garfield County, Colorado June 27, 2011 GEG Job No. AD114029 3 A lrlm:lcon COMPANY Limitations This Addendum 1 is specific to the information presented. All other recommendations presented in the referenced report or Addendum 1 should be included in the design and construction of the proposed communication building. The scope of work performed is specific to the proposed construction and the client identified by this Addendum 1. Any other use of the data, recommendations and design parameters (as applicable) provided within this report are not appropriate applications. Other proposed construction and/or reliance by other clients will require project specific review by this firm. Changes in site conditions can occur with time. Changes in standard of practice also occur with time. This Addendum 1 should not be relied upon after a period of three years from the date of this Addendum 1 and is subject to review by this firm in light of new information that may periodically become known. We believe this addendum was prepared in a manner consistent with that level of care and skill ordinarily used by geotechnical engineers practicing in this area at this time. No other warranty, express or implied, is made. If we can be of further service in discussing the contents of this report or the analysis of the influence of the subsurface conditions please call. Sincerely, GEOTECHNICAL ENGINEERING GROUP, INC. Norman W. Johnston, P.E. Senior Engineer NWJ:nj (1 copy sent) 1 cc Emailed: psprouse@thinaircommunications.com Williams 80 Ft Communication Tower, Addendum 1 Garfield County, Colorado June 27, 2011 GEG Job No. ADl14029 Reviewed By: John P. Withers, P.E. Senior Engineer 4 ) ) , ) ) Mr. Bryan Hotard Field Land Team Lead Williams Production RMT Company LLC 1058 County Road 215 Parachute, CO 81635 Fox Engineering Solutions, LLC July 6,2011 Re: TR 41-35-597 Communications Site -Groundwater and Aquifer Recharge Review Garfield County, Colorado Dear Mr. Hotard, As requested, Fox Engineering Solutions has examined the impacts to groundwater and aquifer recharge areas from the proposed uses at the TR 41-35-597 communications site as required in Williams' Limited Impact Review application, pursuant to Section 4-502 E of the Garfield County Unified Land Use Code. The proposed TR 41 -35-597 site is located in the NE1/4 of the NE1 /4 of Section 35, Township 5 South, Range 97 West, 6'h P.M. It is our understanding that the communication site will replace an existing tower and associated infrastructure. The footprint of the communications site will be slightly smaller than the existing tower arrangement; 1350 s.f. compared to the existing 1400 s.f.; and will contain a tower with pad, equipment shed, solar panels and a 500-gallon propane tank. The proposed use is a communication tower with electronic equipment shed. Propane will be utilized to provide supplemental power at the site. No water uses are associated with the operations of the communications site. The site is unmanned with no demand for potable water or the need for sanitary facilit ies and wastewater discharges. Precipitation runoff, associated with the proposed site, will essentially remain unchanged from existing tower arrangement and continue to flow onto the TR 41-35-597 well pad. The TR 41-35-597 well pad and the communications site are included in a CDPHE approved Storm Water Management Plan, Certification No. COR-03A 116, to control and prevent erosion; and eliminate degradation to water quality. The Storm Water Management Plan will be implemented for this project. Currently, the TR 41-35-597 well pad is Inspected every 14 days. Geographically, the communications site is on one of the highest points in the area; located on a ridge top at an elevation of approximately 8706 ft, MSL, in a remote and mountainous area. There are no floodplains; alluvial fans; or perennial, intermittent or ephemeral drainages located within the site. Crystal Creek, tributary to Roan Creek, is located approximately one-half mile to the northwest at an elevation of 8160 ft. Willow Creek, tributary to Parachute Creek, is located one-half mile to the southeast at an elevation of 8200 ft. The National Resources Conservation Service (NRCS) survey classifies the site soils as ParachuteIrigul complex loam underlain with shallow bedrock consisting of shale, siltstone and sandstone. The typical soil profile is listed as a -10" loam; 1 0" -25" very channery loam; and 25" -29"unweathered bedrock. The depth to a restrictive feature or layer is stated to be 20" -40" to paralith ic bedrock. Bryan Hotard July 6, 2011 TR 41-35-597 Groundwater and Aquifer Recharge Based on our review of published data and knowledge of the site, it is our assessment that the proposed uses at the communications site will not impact groundwater or aquifer recharge areas. Should you have any questions or require additional information, please let us know. Su~· r;: David Fox, P.E. Fox Engineering Solutions LLC 670 Canyon Creek Drive Grand Junction, CO 81503 Ph: (970) 250-5505 Fax (626) 784-0667 Email: coloradofox@bresnan.net ) ) ) WILLIAM PRODUCTION RMT, CO. TR 41-35-597 COMMUNICATION TOWER Impact Analysis: Section 4-502 E (8) Environmental Effects Garfield County Unified Land Use Resolution 2008 Cover Photo: View of existing terrain and vegetation at the proposed communication tower. Prepared for: Williams Production RMT, Parachute, CO and Phil Vaughan Construction Management, Inc., Rifle, CO Prepared by: WestWater Engineering, Inc. Grand Junction, CO. June 2011 INTRODUCTION At the request of Phil Vaughan (PVCMI), on behalf of Williams Production RMT (Williams), WestWater Engineering (WWE) biologists conducted field surveys and assessments of wildlife, wildlife habitats, and sensitive plant species at Williams proposed TR 41-35-597 communication tower site (Figure I). The proposed project is a replacement for an existing 15 foot high communications tower (cover photograph). Surveys were conducted on June 28, 20 II. This document reports the results and analysis of the findings that are pertinent to Garfield County Land Use regulations (2008) that apply to this project. The site is located on private lands approximately 12.5 miles northwest of Parachute, CO in Section 35, Township 5 South, Range 97 West, 6th Principal Meridian. The elevation is approximately 8,700 feet. Access is via the Garden Gulch road and to the northwest on a private road system (Garden Gulch extension) to the divide between Parachute Creek and Roan Creek, known as the Trail Ridge area (Figure 1). SURVEY METHODS A preliminary review of the project area using aerial photographs was conducted to familiarize biologists with the project area and as an aid to help determine the potential presence of wildlife and any threatened, endangered, or sensitive species including plants. Field data collected during the survey were documented and/or recorded with the aid of a handheld global positioning system (GPS) receiver utilizing NAD83 map datum, with all coordinate locations based on the Universal Transverse Mercator (UTM) coordinate system. WWE biologists conducted pedestrian surveys of the area to identify and locate wildlife species, wildlife sign, vegetative communities, and wildlife habitats. Raptor nest surveys were conducted using call playback methodology (Iverson and Fuller 1991; Kennedy and Stahlecker 1993; Mosher and Fuller 1996; Mosher et. al. 1990; Reynolds et. al. 1992) using FoxPro NX3 digital game calls. Vegetation types were determined through field identification of plants, aerial photography, and on-the-ground assessments of plant abundance. Visual searches for raptor and other bird species nests focused on aspen groves within a 0.25-mile radius of the project site. Nest searches and bird identification were aided with the use of binoculars. Weed survey were conducted out to a 100 foot radius of the project site. Photographs were taken of the general project location, vegetation, and terrain. SECTION 4-502 E. -ENVIRONMENTAL EFFECTS EXISTING ENVIRONMENTAL CONDITIONS WATERS OF THE U.S.--Army Corps of Engineers (ACOE) The site is located on the top of a hill along a major ridge line west of headwaters of Willow Creek, which is a tributary of Parachute Creek (Figure 1). WWE biologists determined that no wetlands or drainages showing characteristics of Waters of the U.S. (WOUS) were located on the communications tower site. VEGETATION The project site is located on the north side of an existing natural gas well pad and associated natural gas production facilities. The existing vegetation within the boundary of the WestWater Engineering Page 1 of II June 2011 communications tower site is not diverse and is composed of predominantly grass species, which were planted as part of reclamation at the well pad and existing tower site. Before the existing tower site was developed, native vegetation consisted of Gambel oak, sagebrush, and serviceberry with an understory of grasses and forbs. Vegetation surrounding the project site is composed of three relatively large aspen groves with mountain shrub lands interspersed between the aspen groves (Figure I). The shrublands are composed of deciduous and evergreen shrubs. There are no pinon-juniper woodlands affected by the project. Species observed during the survey are shown in Table I. Table 1. Common plant species observed within the general project area of Williams communications tower Plants Species Occurring Within 100 feet of the Tower Site Orchard grass Houndstongue Mountain big sagebrush Serviceberry Brome grass Muttongrass Puccoon Gambeloak Sunflower Lupine Bull thistle Wheatgrass species Common Plant Species Occurring Within 0.25 Miles of the Tower Site Aspen Douglas-fir (2 trees only) Mutton grass Willow Columbine Peavine Rabbitbrush Kochia Pepper weed Russian thistle Prickly-pear cactus Delphinium (larkspurt Puccoon Lupine Arrow-leaf balsam root Serviceberry Wild rose Chokecherry Sunflower Green rabbitbrush Current Columbine Sulphur flower buckwheat 2 species of violets Fringed sage Yarrow Indian ricegrass Monument plant Meadowrue Bitterbrush Threatened, Endangered, Sensitive Plant Species A review of the Colorado Natural Heritage Program (CNHP) database, soils and terrain at project site, and previous WWE surveys indicated that only one sensitive plant species could potentially occur within the project area (Table 2). The BLM listed sensitive plant species, Piceance Bladderpod, has been observed along Bear Run Creek, which is about 2.0 miles northeast of the tower site. T a ble 2. Po etn·tIa I sensItIve plant specIes at t II C W·IW l ams commulllcatIon towcr site. Common Scientific Name Habitat Preference Name Piceance Lesquerella Shale outcrops of the Green River Formation; on ledges and bladderpod varviflora slopes of canyons in open areas; elevation 6,200 to 8,600 feet. WestWater Engineering Page 2 of II June 2011 No threatened, endangered, or sensitive special status plants were observed during the survey. In addition, no threatened, endangered, or sensitive plant species are known to occur in the project area based on the review of Colorado Natural Heritage Program database records (CNHP 2008). Noxious Weeds Intensive weed surveys were conducted within 100 ft of the proposed tower location (Figure 1). Two listed (Garfield County and State of Colorado) weed species are found in the project area (Figure I and Table I). The most prevalent listed weeds were houndstongue (Cynoglossum officinate) and bull thistle (Cirsium vulgare). Table 1. Observed Noxious Weed Locations in the Project Area Common Name Scientific Name Houndstongue Cynoglossum officinate Bull thistle Cirsium vulgare WILDLIFE Raptors General Location and Comments This species was observed scattered around the existing tower site in mostly single plants and not large groups. Plants were just beginning to flower. A few scattered plants were observed around the tower site. This species is common in the aspen groves on the sides of the hill that are adjacent to the project site. Ten raptor (birds of prey) species may potentially nest, reside, forage, or pass through the general project area. Expected raptor species within the project area are listed in Table I. The most common raptor species that may potentially occur include Red-tailed Hawk, Cooper's Hawk, American Kestrel, and Great Horned Ow\. Table 4. Raptor species that may be present in the communication tower project area. Common Name Scientific Name BCC' American Kestrel Falco sparverius No Cooper's Hawk Accipiter cooperii No Flammulated Owl Otus jlammeolus Yes Great Homed Owl Bubo virginian us No Long-eared Owl Asio otus No Northern Goshawk Accipiter gentiles No Northern Harrier Circus cyaneus Yes Northern Saw-whet Owl Aegolius acadicus No Red-tailed Hawk Buteo jamaicensis No Sharp-shinned Hawk Accipiter striatus No *BCC-U.S. FIsh and Wlldhfe Service, Bird of Conservation Concern. WestWater Engineering Page 3 of II June 2011 No raptor nests were observed within the 0.25 mile survey buffer around the proposed communications tower. However, an active Red-tailed Hawk nest was observed in a dead aspen tree located about 65 yards north of the 0.25 mile survey buffer (Figure 1). The nest was occupied by at least one young hawk (chick), which was approximately 10-14 days old. A second unoccupied raptor nest was encountered approximately 220 yards west of the 0.25 mile buffer. Red-tailed Hawks were observed on two occasions soaring over the general project area; most likely these were the nesting pair that was observed during the survey and were likely searching for prey. Three additional historic raptor nests have been identified by WWE during previous surveys within one mile of the project site. These nests are shown on Figure 2 and provide data on the quality of the raptor habitat in the Trail Ridge area. Potential raptor nesting and foraging habitat occurs in the aspen groves that are found east, west and northeast of the tower site. There are no cliffs in the general area, which would support nesting raptors. The remaining vegetation surrounding the tower site is mainly Gambel oak, chokecherry, and serviceberry, none of which is high enough to be suitable raptor nesting habitat. Migratory, Non-migratory and Birds of Conservation Concern (other than raptors) WWE biologists surveyed the project area for the presence of any bird species that could potentially be affected by the project. Particular attention was given to searching for birds that are listed as sensitive by the Bureau of Land Management, the u.s. Fish and Wildlife Service, and the Colorado Division of Wildlife. Birds of Conservation Concern (BBC) are species listed by the U.S. Fish and Wildlife Service that are priorities for conservation action. The goal is to prevent or remove the need for additional endangered species act (ESA) bird listings by implementing proactive management and conservation actions. • Table 7. Status of BLM sensitive species and BCC species that may occur within project area Habitat or Species Species • Species Common Scientific Status Habitat Description Potentially Name Name Occurring within Landscape Area BIRDS Nests in ponderosa pine, Douglas-Habitat -Yes Cassin's Carpodacus Bee firs, and conifer forests. May occur Species-Not observed in the Finch cassinii in pinon/juniper woodlands and aspen groves surrounding the aspen groves. proj ect area. Inhabits sagebrush dominated Habitat -Yes Brewer's Spizella Bee shrublands and typically are found Species -No nesting Sparrow breweri in habitat that supports sage observed, but nesting is sparrows. likely. Greater Centrocerus Inhabits sagebrush dominated Habitat-Marginal Sage-Grouse urophasianus e,se shrublands. Species-Not observed, no nesting observed . BCC=Bird of Conservation Concern, C=federal candidate, and SC=CDOW special concern. WestWater Engineering Page 4 of 11 June 2011 No birds were observed occupying or nesting within a 100 foot radius of the boundary of communications tower. These results were expected based on the lack of cover in this area and the proximity to the existing natural gas facilities. The lack of shrub and ground cover within 100 feet of the tower site precludes nesting for bird species that typically select these habitats for nesting. A 100 ft buffer is the typical distance that the u.s. Fish and Wildlife Service stipulate for protection of nesting migratory birds, excluding raptors. The shrublands, aspen groves, and understory grasses in the area surrounding the project site provide nesting and foraging habitat for various migratory and non-migratory bird species, depending on the season of the year. Bird species observed during the survey included American Robin (Turdus migratorius), Green-tailed Towhee (Pipilo chlorurus), Mountain Bluebird (Sialia currucoides), Chipping Sparrow (Spizella passerina), Hairy Woodpecker (Picoides villosus), Tree Swallow (Tachycineta hicolor), Violet-green Swallow (Tachycineta thalassina), Dark-eyed Junco (Junco hyemalis), and Yellow-rumped Warbler (Dendroica coronate). Greater Sage-Grouse Greater Sage-Grouse occurs in suitable habitat on the Roan Plateau and is a candidate for listing under the ESA. There is no sage-grouse habitat within the general disturbance area of the tower site. However, based on results of this survey, there is limited off-site potential, but marginal habitat for sagegrouse in the area southwest of the tower site. In this area, approximately 0.1 mile southwest of the proposed tower site, there is a narrow strip of sagebrush dominated habitat that appears to be suitable for sage-grouse use (Figure I). Surveys were conducted in this area looking for sagegrouse and grouse sign (droppings, feathers, or tracks). No sage-grouse or sage-grouse sign were detected. This habitat is marginal, since there is no connectivity to other areas of occupied sagegrouse habitat. Lek (breeding/strutting grounds) sites are important reproductive features in sage-grouse habitat. Research by the Colorado Division of Wildlife (CD OW) indicates that approximately 80 percent of the females nest in suitable habitats within a 4-mile radius of the lek on which they were bred (CDOW 2008). Six sage-grouse lek sites are located with 4.0 miles of project area (Figure 2). The Bear Run lek is the closest site to the project area. It is an active lek and is located approximately 2.58 miles northeast of the site. The other five sites are located between 2.61 and 3.95 miles from the project site (Figure 2). Due to distance from the lek site and limited potential habitat, it is unlikely the sage-grouse would occupy habitat at the project site. American Elk and Mule Deer The communication tower site is located on the boundary between CDOW Game Management Units (GMU) 31 and 32. The project area is within CDOW mapped mule deer and American elk overall (summer) range (NDIS 2011). No mule deer or elk production (fawning and calving) areas are mapped by the CDOW, but the aspen and dense mountain shrub lands surrounding the tower site is likely within mule deer fawning and elk calving habitat. No mule deer or elk were observed during the survey, however, deer and elk droppings as well as fresh tracks were observed frequently in the project area. There are no mule deer or elk winter ranges in the project area, due to the high elevation and deep snows that cover the area during the winter. Elk and mule deer utilize the summer range extensively on the Roan Plateau, following the snow line up to higher elevations in the spring. Mule deer rely on the existing sagebrush and shrubs WestWater Engineering Page 5 of II June 2011 for their primary food source, while elk rely primarily on available grasses for food. Adjacent areas of aspen and scattered oak brush/serviceberry provide necessary forage and production areas as well as escape, thermal, and loafing cover for deer and elk, particularly during the summer period. Black Bear and Mountain Lion CDOW-NDIS mapping shows the site to be within overall range for black bear and mountain lion (NDIS 2011). During the survey, black bear sign, including fresh droppings (scat) and claw marks on aspen trees was observed. The chokecherry, serviceberry, and Gambel oaks were observed to be blooming and the chances of a good berry and mast crop for later summer-early fall is high. Therefore, black bears will be foraging in the general area later this year. Black bear are a common resident mammal on the Roan Plateau. Black bears are omnivorous and the diet depends largely on what kinds offood are seasonally available, although their mainstay is vegetation. In spring, emerging grasses and succulent forbs are favored. In summer and early fall, bears take advantage of a variety of berries and other fruits. In late fall, preferences are for berries and mast (acorns), where available. Black bear are in hibernation from mid-November through May. Mountain lion typically follow migrating deer herds in search of deer as the primary food source. They tend to have large territories and are highly mobile as they search for food or new territories. Mountain lions likely inhabit the general project area during the summer months, but use would be transitory. The project area is not mapped by CDOW as a potential mountain lion conflict area. Small Mammals Common small mammal species in the project area include coyote (Canis latrans), goldenmantled ground squirrel (Spermophilus lateralis), northern pocket gopher (Thomomys talpoides), and least chipmunk (Tamias minimus). Reptiles Western terrestrial garter snakes (Thamnophis elegans) have previously been observed in the vicinity of the project area. This species is common on the Roan Plateau and is typically observed around perennial creeks and ponds. Smooth green snakes (Liochlorophis vernalis) were not observed during surveys, but are known to occur on the Roan Plateau (Hammerson 1999). Short-homed lizards (Phrynosoma hernandesi) were observed during the survey on the west side of the main Trail Ridge access road in sagebrush shrublands with exposed sandstone bedrock. This species appears to be fairly abundant along ridge lines in sagebrush habitats; it is not a species with any special protection by CD OW or U.S. Fish and Wildlife Service. Amphibians Tiger salamanders (Ambystoma tigrinum) are the only species of amphibian inhabiting the Roan Plateau. This species occurs sporadically across the Roan Plateau in suitable ponds, perennial streams, and wetlands. The species prefers to breed in permanent ponds and small reservoirs, neither of which is found in the project area; no suitable habitat is found in aspen groves on both WestWater Engineering Page 6 of 11 June 2011 sides of the project area. Since there are no permanent water sources within the proposed project area, no amphibian species would be potentially present. SECTION 4-502 (8) (a) Determination of Long and Short-term Effects on Flora and Fauna FAUNA Raptors No direct impacts will occur to raptor nesting or foraging habitat and no nest sites are located where removal of the nest tree is a concern. No occupied raptor nests were identified within 0.25 miles of the site. Red-tailed Hawks are a raptor species that tend to tolerate human related activities and become habituated to the presence of human disturbance. The presence of this species nesting in the general project area in close proximity to roads, natural gas well pads, and other human developments reflects the tolerance of this species. The possibility for long or short-term effects is related to the potential for collisions with the tower structure. The chances for collisions are likely to be short term as raptors that inhabit the general area become aware of the presence of the new tower structure. The tower should have no long-term effects on raptor populations. Greater Sage-Grouse There should be no short or long-term effects on sage-grouse populations or distribution, due to the distance from lek sites and known occupied habitat. No habitat loss will occur and collisions with the tower are highly unlikely for this bird, since it is mostly a ground dwelling species. The limited amount of potential sagebrush dominated habitat near the project site is unlikely to be of sufficient size to attract birds to the area at any time during the year. American Elk and Mule Deer The project will not reduce the available habitat, including forage or cover, for mule deer or elk and will not negatively affect population densities or summer distribution. The physical present of the tower will not impact deer or elk use in the surrounding vegetation. Black Bear and Mountain Lion No vegetation will be lost in habitats that are suitable for black bear of mountain lion. Indirect effects from construction disturbance should not impact either species. Potential encounters of black bear with construction personnel could potentially occur if garbage or food is available to resident bears. Incidences with human-black bear interactions sometimes result in the euthanasia of offending bears by the CDOW. WestWater Engineering Page 7 of II June 2011 Small Mammals, Birds (BCC), and Reptiles Affects of habitat loss to these species are expected to be negligible due to previous development of the general project area and the large amount of habitat available in the surrounding area. FLORA A very limited amount of grasses and forb species within the boundary of the communications tower pad site will be removed during the construction phase of the project. Site reclamation will quickly restore the grass and forb component presently in the project area. Vegetation surrounding the project area will not be affected on a long or short-term basis and will likely remain in its present condition. SECTION 4-502 (8) (c) (1) Determination of the effect on significant environmental resources--critical wildlife habitat The development of the communications tower is not expected to significantly affect any critical wildlife habitat for any wildlife species. Potential issues are outlined below. • Creation of hazardous attractions: The potential exist that bird mortality may result from collisions with the tower structure. The low height of the tower, lack of guy wires, and visibility of the support structure will not likely result in significant bird mortality. In addition, the communication tower structure is not likely to attract wildlife such that mortality will occur. No portions of the project site (ground and tower structure) will introduce features that would likely entrap or harm wildlife that occur in the area. • Indirect Construction Effects: Project construction factors such as the presence of construction personnel and noise has a low potential to affect wildlife in a negative manner. Since construction is limited to a relatively small project site at the top of hill, most wildlife will be unable to see or hear construction associated disturbance factors. Most suitable habitat is not visible from the project site due to the steep terrain and dense aspen stands and mountain shrubs. • Alteration of Existing Vegetation: The existing grass vegetation within the project footprint will be lost during the duration of use at the communication tower. However, the vegetation is neither unique or in limited availability relative to the large expanse of similar vegetation in the Trail Ridge area. • Big Game Migration Corridors: No migration corridors will be affected. Both species of big game ungulates in the area are not restricted to specific movement corridors in this area and the Colorado Division of Wildlife has not identified any migration corridors or highway crossings in the project area. • Roadkill: Vehicle speeds and volumes along the Trail Ridge access road are likely to be similar to present trends. Since this gravel road does not allow for high speeds, the chance for increased roadkill of big game wildlife is low. • Bird Nesting Habitat: No bird nesting habitat will be lost due to project development. No suitable sage-grouse habitat occurs at the project site. WestWater Engineering Page 8 of II June 2011 REFERENCES Andrews, R., and R. Righter. 1992. Colorado Birds: A Reference to Their Distribution and Habitat. Denver Museum of Natural History, Colorado. Craig, Gerald R. 2002. Recommended Buffer Zones and Seasonal Restrictions for Colorado Raptors. Colorado Division of Wildlife, Denver. Hammerson, G. A. 1999. Amphibians and Reptiles in Colorado, Second Edition. Colorado Division of Wildlife, Denver. Iverson, G.c. and M.R. Fuller. 1991. Woodland nesting raptor survey techniques. Pp 118-124 in Proc. Midwest Raptor Management Symposium and Workshop. National Wildlife Federation, Washington D.C. Kennedy, P. 1., and D.W. Stahlecker. 1993. Responsiveness of nesting northern goshawks to taped broadcasts of3 conspecific calls. Journal of Wildlife Management 57: 249-257. Kingery, H. E. 1998. Colorado Breeding Bird Atlas. Colorado Bird Atlas Partnership, Colorado Division of Wildlife, Denver. Klute, D. 2008. Recommended Buffer Zones and Seasonal Restrictions for Colorado Raptors. Colorado Division of Wildlife, Denver. Mosher, J.A., M.R. Fuller, and M. Kopeny. 1990. Surveying woodland raptors by broadcast of conspecific vocalizations. Journal ofField Ornithology. 61:453-461. Mosher, J.A. and M.R. Fuller. 1996. Surveying woodland hawks with broadcasts of Great Homed Owl vocalization. Wildlife Society Bulletin. 24: 531-536. NDIS. 20 II. Natural Diversity Information Source-Colorado Division of Wildlife. http://ndis.nrel.colostate.edulwildlife.asp. Accessed June 17,2011. Poole, A. (Editor). 2005. The Birds of North America Online: http://bna.birds.comell.edu/BNA/. Cornell Laboratory of Ornithology. Ithaca, NY. Reynolds, R. T., R. T. Graham, M. H. Reiser, R. 1. Bassett, P. 1. Kennedy, D. A. Boyce Jr., G. Goodwin, R. Smith and E. L Fisher. 1992. Management recommendations for the northern goshawk in the southwestern United States. General Technical Report RMGTR-217, U.S. Department of Agriculture, U.S. Forest Service, Rocky Mountain Forest and Range Experiment Station, Fort Collins, Colorado .. Righter, R., R. Levad, C. Dexter, and K. Potter. 2004. Birds of Western Colorado Plateau and Mesa Country. Grand Valley Audubon Society, Grand Junction, Colorado. USFWS. 2008. Birds of Conservation Concern 2008. U.S. Fish and Wildlife Service, Division of Migratory Bird Management, Arlington, Virginia. WestWater Engineering Page 9 of II June 2011 Figure 1 Williams Production RMT TR41-35-597 Communications Site o Biological Survey Location, Raptors and Weeds ""'l NestWater Engineering -=;;;! Consulting Engineers & Scientists 01 June 2011 0.2 * Occupied Raptor Nest * Unoccupied Raptor Nest & Bull Thistle .... Houndstong ue D Aspen Groves: Raptor Habitat D Sage Grouse Suitable Habitat D Raptor Survey Area ..... .. Weeds Survey Area BLM Map Source Z \WQtams. RMl\V,lBey PfOle<;!$ RMnTR 4 1-3:>597 Com-nun''''lJOns SlIe\GISlF ogure 1 LocallOn Raplorsand VVeeds"",d June 2011 fbI) Figure 2 Williams Production RMT TR41-35-597 Communications Site Biological Survey o Sage Grouse Leks and Raptor Nests !:lI 'Illest Water Engineering ~ Consulting Engineers & Scientlsts 0.5 15 Miles MapS 3 4 5 6 Legend ..o.I"'..z.. Sage Grouse Leks * Occupied Raplor Nesl * Unoccupied Raplor Nesl D Raplor Survey Area D Weeds Survey Area c:::;:J BLM WolfCreek Bear Run House Log Gulch Deer Park Gulch Lazy Ridge 3.91 3.95 2.58 3.37 2.70 <.61 \wn,ams RMTWalley ProJects RMnTR ""·35-597 COrTVl'\UnlCahons Srte\GISIF'ljure 2 Sage Grouse and R .. d June 2011 rbb FOR OFFICIAL USE ONLY: DISCLOSURE OF SITE LOCATIONS IS PROHIBITED (43 CFR 7.18) REpORT ON THE CLASS I CULTURAL RESOURCE INVENTORY FOR A LIMITED IMPACT REVIEW FOR A PROPOSED COMMUNICATION TOWER RELOCATION (LOCATION TR 41-35-597) ON PRIVATE LAND IN GARFIELD COUNTY, COLORADO FOR WILLIAMS FIELD SERVICES COMPANY, LLC Declaration of Negative Findings GRl Project No. 2011-61 27 June 2011 Prepared by Carl E. Conner, Principal Investigator Grand River Institute P.O. Box 3543 Grand Junction, Colorado 81502 BLM Antiquities Permit No. C-5277S Submitted to Board of County Commissioners Garfield County, Colorado Abstract At the request of Williams Field Services Company, LLC, Grand River Institute (GR!) conducted a Class I cultural resource inventory for a proposed communication tower relocation. The project is located on a ridgetop approximately 19 miles southwest of Rio Blanco, on private land in Garfield County, Colorado. This work was performed under BLM Permit No. C-52775. The Class I inventory was unde11aken to ensure the project's compliance with state and federal legislation governing the identification and protection of cultural resources on privately owned lands that will be affected by a government action. The purpose of the cultural resources investigation was to identifY previously recorded resources within or near the proposed project location (less than a five acre block) that may be adversely affected by the proposed action and to evaluate the potential of additional such resources in the project areas. The Class I files search and rep0l1 preparation were performed between the 24'h and 27'h of June 2011. As a result of the files search, no cultural resources have been previously recorded within the area of proposed impact and no cultural resources have been recorded within a mile of the project. Additionally, five cultural resource studies have been previously conducted within a mile of the proposed project. The proposed project is the construction of a communication tower. Overall, the project area is within a geographic region with steep and difficult access, and dense vegetation. Cultural resources in the area are rare. Since five pedestrian cultural resource surveys have been previously conducted in the vicinity and no cultural resources have been recorded during the course of those projects, additional resources are unlikely. Accordingly, a determination of "no effect" is deemed appropriate for the proposed action. No further work is recommended. 11 TABLE OF CONTENTS Introduction ............................................................. . Location of the Project Area ................................................. I Environment .............................................................. I Paleoclimate .............................................................. 3 Files Search Results ................................... ..................... 4 Report Results ............................................................ 5 Summary and Recommendations ............................................. 6 References ................................................................ 7 LIST OF FIGURES AND TABLES Figure I. Project location map ................................................ 2 Table I. List of projects previously conducted within and nearby the study area. . ........ 4 III Introduction At the request of Williams Field Services Company, LLC, Grand River Institute (GRI) conducted a Class I cultural resource inventory for a proposed communication tower relocation. The project area (less than a five acre block) is located on a ridgetop approximately 19 miles southwest of Rio Blanco, on private land in Garfield County, Colorado. This work was performed under BLM Permit No. C-52775. The Class I files search and repott preparation were performed between the 24th and 27th of June 2011 by Carl E. Conner, Principal Investigator and Barbara Davenpott. The Class I inventory was undertaken to ensure the project's compliance with state and federal legislation governing the identification and protection of cultural resources on privately owned lands that will be affected by a government action. It was done to meet requirements of the National Historic Preservation Act (as amended in 1992), the National Environmental Policy Act of 1969 (42 U.S.C. 4321), the Federal Land Policy and Management Act of 1976 (43 U.S.C. 1701), and the Archaeological Resources Protection Act of 1979 (16 U.S.C. 470aa et seq., as amended), and Article 80.1, Colorado Revised Statutes. These laws are concerned with the identification, evaluation, and protection offragile, nonrenewable evidence of human activity, occupation, and endeavor reflected in districts, sites, structures, artifacts, objects, ruins, works of art, architecture, and natural features that were of importance in human events. Such resources tend to be localized and highly sensitive to disturbance. All work was performed according to guidelines set forth by the Office of Archaeology and Historic Preservation (OAHP) of the Colorado Historical Society. Location of the Project Area The study area is located about 19 miles southwest of Rio Blanco, on a ridgetop between Clystal and Willow Creeks in Garfield County, Colorado. The proposed communication site occurs in T. 5 S., R. 97 W., Section 35; 6th P.M. (Figure I). Environment The project area is located south of the Divide Road that runs along a mountainous ridge ofthe Roan Plateau that divides the area drained by the Piceance Creek on the nOlth and Parachute Creek on the south. These areas are located within a large nOlthwest-southeast trending structural downwarp known as the Piceance Creek Basin, a major geological subdivision of Colorado. Subsidence of the Basin probably began some 70 million years ago, with the onset of the Laramide Orogeny during Late Cretaceous times, and continued until the Late Eocene (Young and Young 1977: 46). During this period of roughly 25 million years, the Basin received as much as 9000 feet of Teltiary stream and lake deposits, all of which gently dip toward the center of the downwarp. The Tel1iary-age Uintah Formation occurs within the study area. I ) ) I '{ I > • Ir "" -/I ' ... ", " I, Cutoff Gulch (197111973) Quadrangle Map Garfield County -Colorado U.S.G.S. 7.5' Series (topographic) Scale 1:24000 Contour Interval 40 Feet T. 5 S., R. 97 W., 6th P.M. , " /} " Figure I. Project location map for the Class I cultural resources inventory for a limited impact review for a proposed communication tower relocation on private land in Garfield County, Colorado for Williams Field Service Company, LLC. The study area is indicated. [GRI Project #2011 -61, 6/24/20 II] 2 Elevation of the project area is approximately 8600 feet, which falls within the Transitional Zone. On the ridge tops and sides, the understory is quite thick, consisting of chokecherry, smooth maple, serviceberry, and wild rose. The higher elevation ridges also have groves of aspen, common particularly at the heads of drainages. On the steep slopes bordering these uplands is found the only coniferous forest type of the project area, the Douglas fir. Its associated understory is light--predominantly snowberry, serviceberry, and barberry. Most of the flat terrain is occupied by mountain big sage and western snowbeny. Gentle nOl1h and eastfacing aspects suppOl1 a mountain blUsh community-Utah servicebeny, gam bel oak, and snowberry. Ground cover ranges from 80 to 100 percent. Soils on the ridgetops are shallow loams with intermixed shale, or fractured shale. Away from the ridge, soils deepen and become darker and loamier. Nineteen mammal species-among them the deer mouse, least chipmunk, short-tailed weasel, mule deer, and black beat~and 38 bird species are known in the Douglas fir community. Amid the aspen environment are 16 mammals-including the deer mouse, masked shrew, least chipmunk, nOl1hern pocket gopher, montane vole, porcupine, striped skunk, short-tailed weasel, red fox, deer, and elk-and 30 birds. The mountain blUsh community attracts 37 bird species and 27 mammal species, among these the rock squirrel, bushy-tailed woodrat, deer mouse, porcupine, least chipmunk, beaver, muskrat, raccoon, striped skunk, coyote, red fox, and the shOl1-tailed weasel (Union Oil Company, Energy Mining Division 1982:Hl4-18). Present land use includes energy development, open range for domestic animals, and modern hunting. Climatically, the region is characterized as having a steppe-type climate. Average annual rainfall ranges roughly between 12 and 24 inches. On the Roan Plateau at 8000 feet, the average annual rainfall is 25.66 inches and the average annual temperature is 35.5 0 F. (ibid.: 182, Tables K.1.5 and K.1.7). Temperatures have varied between -20 degrees F. in winter and 90 degrees F. in summer with a frost free seasonal range of 70 to 100 days. Agriculture is limited by the low rainfall, a shOl1 period offrost-free days, and low winter temperatures (USDA SCS 1978). Paleoenvironmental data for the area are scant, but it is agreed that gross climatic conditions have remained fairly constant over the last 12,000 years. Still, changes in effective moisture and cooling! warming trends probably affected the prehistoric occupation of the area. Paleoclimate Relatively small changes in past climatic conditions altered the exploitative potential of an area and put stress upon aboriginal cultures by requiring adjustments in their subsistence patterns. Therefore, reconstruction of paleoenvironmental conditions is essential to the understanding of population movement and cultural change in prehistoric times (Euler et al. 1979). To interpret whatever changes are seen in the archaeological record, an account of fluctuations in past climatic conditions must be available or inferences must be made from studies done in surrounding area. Generally, only gross climatic trends have been established for western NOI1h America prior to 2000 BP (Antevs 1955; Berry and Berry 1986; Madsen 1982; 3 I Mehringer 1967; Peterson 1981; Wend lund and Bryson 1974). Scientific data derived from investigations of prehistoric cultures and geoclimatic and bioclimatic conditions on the southern Colorado Plateau over the past two millennia have achieved a much greater degree of resolution (Dean et al. 1985). Files Seal'ch Results Cultural resource investigations in the region have yielded surface diagnostic artifacts and excavated cultural materials consistent with the regional cultural histOlY. Evidence provided by chronometric diagnostic artifacts and radiocarbon analyses indicate regional occupation during the Paleo indian, Archaic, Formative, and Protohistoric Eras. Historic records indicate occupation or use of the region by EuroAmerican trappers, settlers, miners, and ranchers as well. Overviews of the prehistory and histOlY of the region are provided in the Colorado Council of Professional Archaeologists' publications entitled "Colorado Prehistory: A Context for the NOlihern Colorado River Basin" (Reed and Metcalf 1999), and "Colorado History: A Context for Historical Archaeology" (Church et al. 2007), and also in a new document, "Class I Cultural Resource Overview for the Grand Junction Field Office of the Bureau of Land Management" (Conner et al. 20 II Files searches for known cultural resources within the project area were made through the Colorado Historical Society's Office of Archaeology and Historic Preservation and the Grand Junction Field Office of the Bureau of Land Management. No cultural resources have been previously recorded within one mile of the project area. A search of the 1884 and 1926 original survey plats on file at the Bureau of Land Management General Land Office Records indicated that no historic features (i.e. trails, ditches, structures etc.) had been noted within the nOliheast quarter of Section 35, T. 5 S., R. 97 W; 6'h P.M. Also, that same office has records documenting a patent inl950 by the Federal Oil Shale Company (Accession #1128042). Additionally, five cultural resource projects have been conducted in the general vicinity (Table I). Table 1. List of projects previously conducted within and nearby the study area. SUI'VellD I PI'O,iect/Author/Date MC.PA.R77 Title: Cultural Resources Survey for the Pacific Shale Project Environmental Baseline GF.PA.RI6 Study (Original and Addendum) Author: Newkirk, Judith A. and Lucy Hackett Bambrey Date: 04/0111983 Contractor: Gilbe,1 Commonwealth 4 I I S\Il"Ve~ ID I Project/Author/Date GF.LM.NR683 Title: Negative Cultural Resources Report of the PDCIChevron Lease Road Segments, Garfield County, Colorado Author: Piontkowski, Michael Date: 0612712003 Contractor: Uncompahgre Archaeological Consultants MC.LM.R516 Title: A Report of the Class III Inventories of the Two Will-Power L.L.C. Pipelines, Garfield and Rio Blanco Counties, Colorado Author: Piontkowski, Michael Date: 11/0512005 Contractor: Uncompahgre Archaeological Consultants MC.LM.R43I Title: Class III Cultural Resource InventOlY Report for the Parachute Lateral Project in Garfield and Rio Blanco Counties, Colorado, for Northwest Pipeline Corporation (GRI Project 2594)(Original and One Addendum) Author: Conner, Carl E. and Barbara J. Davenport Date: 12/0112005 Contractor: Grand River Institute MC.LM.R470 Title: A Rep0l1 of the Class IlllnventOlY of the Encana Meeker South and West Pipelines and Related Facilities, Garfield and Rio Blanco Counties, Colorado, and Uintah County, Utah Author: Piontkowski, Michael Date: 04/01/2006 Contractor: Uncompahgre Archaeological Consultants Repo.·t Results As expected, no cultural resources were encountered within the discrete project area. As a result of the files search, no cultural resources have been previously recorded in the nearby vicinity of the proposed project. Should resources have been determined to be present, the section below identifies and explains the importance of prehistoric and historic resources. Site Significance The National Historic Preservation Act of 1966 (NHPA) directs the BLM to ensure that BLM-initiated or authorized actions do not inadve11ently disturb or destroy significant cultural resource values. Significance is a quality of cultural resource properties that qualifies them for inclusion in the NRHP. The statements of significance included in this repo11 are field assessments to support recommendations to the BLM and State Historic Preservation Officer (SHPO). The final determination of site significance is made by the BLM in consultation with the SHPO and the Keeper of the Register. 5 I The Code of Federal Regulations was used as a guide for the in-field site evaluations. Titles 36 CFR 50, 36 CFR 800, and 36 CFR 64 are concemed with the concepts of significance and (possible) historic value of cultural resources. Titles 36 CFR 65 and 36 CFR 66 provide standards for the conduct of significant and scientific data recovery activities. Finally, Title 36 CFR 60.4 establishes the measure of significance that is critical to the determination of a site's National Register of Historic Places's eligibility, which is used to assess a site's research potential: The quality of significance in American history, architecture, archaeology, and culture is present in districts, sites, buildings, structures, and objects of State and local importance that possess integrity of location, design, setting, materials, workmanship, feeling, and association, and a) that are associated with events that have made a significant contribution to the broad patterns of history; or b) that are associated with the lives of persons significant in our past; or c) that embody the distinctive characteristics of a type, period, or method of construction, or that represent the work of a master, or that possess high artistic values, or that represent a significant and distinguishable entity whose components may lack individual distinction; or d) that have yielded, or may be likely to yield, information important in the prehistOlY or histOlY· Summary and Recommendations As a result of the files search, no cultural resources have been previously recorded within the area of proposed impact and no resources have been recorded in the nearby vicinity. Additionally, five cultural resource studies have been previously conducted within a mile of the proposed project. The proposed project is the construction of a communication tower. Overall, the project area is within a geographic region with steep and difficult access, and dense vegetation. Cultural resources in the area are rare. Since five pedestrian cultural resource surveys have been previously conducted in the vicinity and no cultural resources have been recorded during the course of those projects, additional resources are unlikely. Accordingly, a determination of "no effect" is deemed appropriate for the proposed action. No further work is recommended. 6 References Antevs, E. 1955 Geologic-climate dating in the west. American Antiquity 20:317-355. Berty, Michael S. and Claudia F. Beny 1986 Chronological and Conceptual Models of the Southwestern Archaic. In: Anthropology of the Desert West, ed. by Carol J. Condie and Don D. Fowler, pp. 253-327. University of Utah Anthropological Papers No. 110. Salt Lake City. Church, Minette C. and Steven G. Baker, Bonnie J. Clark, Richard F. Carrillo, Jonathon C. Horn, Carl D. Spath, David R. Guilfoyle, and E. Steve Cassells 2007 Colorado HistOlY: A Context for Historical Archaeology. Colorado Council of Professional Archaeologists. Conner Carl E., Nicole Darnell, Brian O'Neil, Richard Ott, Cmiis Martin, Dakota Kramer, James C. Miller, and Barbara Davenport, Sally Cole, Jim Keyser, and Claudia F. Berry 2011 Class I Cultural Resource Overview Jor the Grand Junction Field Office aJthe Bureau oj Land Management. Michael S. Beny, ed. Ms on file, Bureau of Land Management Grand Junction Field Office. Grand Junction. Dean, JeffelY S.; R. C. Euler; G. J. Gumerman; F. Plog; R. H. Hevly; and T. N.V. Karlstrom 1985 Human behavior, demography and paleoenviromnent on the Colorado Plateau. American Antiquity 50(3):537-554. Euler, Robelt c.; G. J. Gumerman; Thor N.V. Karlstrom; J, S. Dean; and Richard H. Hevly 1979 The Colorado Plateaus: Cultural dynamics and paleoenviromnent. Science 205(4411):1089-1101. Madsen, David B. 1982 Great Basin paleoenvironments: summaty and integration. In:Mand and Enviromnent in the Great Basin, D.ll. Madsen and J.F. O'Collllell, editors. Society of American Archaeology Papers No.2, pp. \02-\04. Wash., D.C. Mehringer, Peter J. 1967 Pollen analysis and the alluvial chronology. The Kiva 32:96-101. Peterson, Kenneth P. 1981 10,000 years of change reconstructed from fossil pollen, La Plata Mountains, southwestern Colorado. Unpublished Ph.D. dissertation, Department of 7 Anthropology, Washington State University, Seattle. Reed, Alan D. and Michael D. Metcalf 1999 Colorado Prehistory: A Context for the NOIihern Colorado River Basin. Colorado Council of Professional Archaeologists. Union Oil Company, Energy Mining Division 1982 Colorado Mined Land Reclamation Board Permit Application. Phase II: Parachute Creek Shale Oil Program. Volumes VI and VII. Union Oil Company of California, Parachute. U.S.D.A., Soil Conservation Service 1975 Soil Survey. Wendlund, Wayne M. and Reid A. Bryson 1974 Dating climatic episodes of the Holocene. QuaternalY Research 4:9-24. Young, Robeli G. and Joann W. 1977 Colorado West, Land of Geology and Wildflowers. Wheelwright Press, Ltd., U.S.A. 8 ) WILLIAM PRODUCnONRMT, CO. TR 41-35-597 COMMUNICA nON TOWER Section 7-202 Protection of Wildlife Habitat Areas Garfield County Unified Land Use Resolution 2008 Cover photo: View of the aspen grove and mountain shrubs located immediately east of the Williams' communications tower project site. SECTION 7-202 Protection of Wildlife Habitat Areas Mitigation Recommendations WILDLIFE Raptors Activities associated with the project have minimal potential to impact raptor populations as no nesting was observed within 0.25 miles of the site in 20 II. If project construction is not completed prior to the next nesting season (May 2012), the site should be re-inventoried by qualified biologists. The main area of concern would be the aspen grove located east of the tower site. Some of the aspen trees are within 100 yds of the project area. If any raptors are found behaving in a manner consistent with nesting, every effort should be made to apply timing limitation and buffer distance stipulations. WWE recommends temporal and spatial restrictions for activities near active nests based on BLM stipulations (BLM 1997), Colorado Division of Wildlife (CDOW) recommendations (Craig 2002 and Klute 2008) and literature review of nesting season timing for raptors in the Roan Plateau region (Andrews and Righter 1992, Kingery 1998, Poole 2005). T a bl e 6 , TI' mi,D an db u ne r recommen d a f IOns or ac f Ive rapltO r nes t s Species Buffer Zone Seasonal Restriction American Kestrel * * Bald Eagle 0.50 mile IS October -31 July Burrowing Owl ISO feet IS March -31 October Cooper's Hawk 0.25 mile I April -IS August Ferruginous Hawk 0.50 mile I Feb -IS July Flammulated Owl 0.25 mile I April-I August Golden Eagle 0.50 mile IS December-IS July Great Homed Owl * * Long-eared Owl 0.25 mile I March -IS July Northern Goshawk 0.50 mile I March -IS September Northern Harrier 0.25 mile I April-IS August Northern Saw-whet Owl 0.25 mile I March -IS July Osprey 0.25 mile I April -31 August Peregrine Falcon 0.5 mile IS March-31 July Prairie Falcon 0.5 mile IS March -IS July Red-tailed Hawk 0.33 mile IS February -IS July Sharp-shinned Hawk 0.25 mile I April -IS August Swainson's Hawk 0.25 mile I April -IS July * Great Homed Owls and Kestrels are relatively tolerant of human acti.v I.t y. Keep activIty to a mI.n.I mum dunng breeding season. Mitigation of potential impacts to birds due to collisions with the communications tower Mortality is caused when birds collide with a tower or its guy wires. Collision rates increase during spring and fall migrations and particularly when there is low cloud cover, fog or inclement weather. It is believed that birds become disoriented by or are drawn to tower lights WestWater Engineering Page I of 5 June 2011 and radio frequencies and circle the tower, increasing the possibility of entanglement in the wires or collisions with support structures. From a collision perspective, the towers that cause the most problems are tall (especially those exceeding 305m [1,000 ftJ), illuminated at night with solid or pulsating incandescent red lights, supported by guy wires, near wetlands, in major songbird migration pathways or corridors, and with a history of inclement weather during spring and fall migrations (Manville 200 I). All towers, however, have the potential to kill birds. Light appears to be a key attractant for nightmigrating songbirds, especially on nights with poor visibility, low cloud ceilings, heavy fog, or various forms of precipitation associated with either passing or stationary cold fronts (Tordoff and Mengel 1956, Ball et al. 1995). The Williams communication tower appears to avoid most of the negative features that may contribute to bird mortality with towers. The low height (80 ft), lack of lighting, lack of guy wires, and not being located near wetlands reduces the chances for bird mortality. Locating the wind charger unit at the mid-point of the tower will reduce the chances of bird mortality with the moving blades of that tower feature. The lack of vegetation surrounding the tower reduces the chances for locally nesting birds to interact with the tower. The two raptor nests in the general project area and three others in the Trail Ridge area (Figure 2), indicates that this family of birds searches for prey along the ridgeline where the tower will be located. During the survey, Red-tailed Hawks from the active nest were observed soaring above the ridgeline where the existing tower is located. The low height of the tower, the conspicuous location, and the high visibility of the support structure greatly reduces the chances of raptor mortality from tower collisions. Based on these factors presented above, it is not expected that bird mortality will be a significant issue with the placement of Williams TR 41-35-597 communication tower. Greater Sage-Grouse The lack of suitable Great Sage-Grouse habitat in the project area and distance from active lek sites indicates that affects to this species are unlikely to occur and no specific mitigation would be necessary. American Elk and Mule Deer The plan for construction of the communications tower area in an area where natural gas facilities already exist will reduce habitat fragmentation and is a good mitigation technique. The existing access road to the proposed communications tower will not disturb additional vegetation or wildlife habitat. Use of the existing tower site for a portion of the new tower will reduce the disturbance of additional wildlife habitat. Implementation of an aggressive noxious weed management plan would improve the existing condition of the area surrounding the proposed development. Elimination of houndstongue and bull thistle would allow for increased grass production for use by wildlife. The reclamation plan that has been developed for the communications tower site (HRL 2011) should be implemented to reduce the regrowth of noxious weeds in disturbed areas. Reclamation WestWater Engineering Page 2 of 5 June 2011 of disturbed areas not utilized as part of the tower would decrease the presence of noxious weeds and provide forage for mule deer and elk. Any livestock fencing (barbed wire) should be constructed to minimally affect elk and mule deer movements. The top stand should be smooth wire. The Colorado Division of Wildlife has published guidelines for construction of fencing that reduces impacts to mule deer and elk (CDOW http: wildlife.state.co.us). Following "wildlife friendly" fencing standards reduces the chance of mortality from animals becoming tangled in fencing and improves the opportunity for less restrictive movements throughout the area. Black Bear Black Bear will likely be foraging in the aspen and mountain shrub habitats surrounding the project site during the summer and particularly when berries and oak brush acorns ripen. Current indications are that there will be a good berry and mast crop during late summer of2011. Construction personnel at the tower site may be unfamiliar with wildlife in the area and should be informed of the potential for bear interactions. Personnel should not feed bears at any time. Bear should not be approached if encountered in the project area. All garbage and any food items should be removed from the site on a daily basis. Mitigation of Habitat Loss to Birds Due to the lack of suitable bird nesting habitat, mitigation for this class of wildlife will not be necessary. However, if any brush clearing is necessary, it should be done outside of the nesting season, which is generally considered to occur between May 15 and July 31 for most species in this area. June 1 to July 15 is the peak period when most incubation and brood rearing takes place. Ifbrush clearing occurs prior to May 15, most affected birds will relocate to alternate nesting sites. After mid-to-late July, most fledging has occurred and brush/tree clearing impacts would be minimized. Small Mammals and Reptiles There are no seasonal restrictions or special requirements for development related to these species. PRESERVATION OF NATIVE VEGETATION The best method to mitigate loss of wildlife habitat is to increase the availability of native forage in the form of grasses and shrubs. The small amount of habitat lost to the tower sites will be minor in relation to the large expanse of the wildlife habitat surrounding the site. Native grasses would provide the greatest benefit for wildlife. The development and application of an integrated vegetation and noxious weed management and implementation of the reclamation plan in areas of disturbance would provide the basis for appropriate mitigation. Treatment and Control of Noxious Weed Infestations In addition to reclamation implemented within the disturbed area of the project site, the highest priority for noxious weed management (eradication) is the houndstongue and bull thistle within 100 feet of the project site. WestWater Engineering Page 3 of 5 June 2011 Noxious weeds aggressively compete with native vegetation. Most have come from Europe or Asia, either accidentally or as ornamentals that have escaped. Once established they tend to spread quickly because the insects, diseases, and animals that normally control them are absent. Prevention is especially valuable in the case of noxious weed management. Noxious weeds are spread by man, animals, water, and wind. Prime locations for the establishment of noxious weeds include roadsides, construction sites, wetlands, riparian corridors, and areas that are overused by animals or humans. Subsequent to soil disturbances, vegetation communities can be susceptible to infestations of invasive or exotic weed species. Vegetation removal and soil disturbance during construction can create optimal conditions for the establishment of invasive, non-native species. Construction equipment traveling from weedinfested areas into weed-free areas could disperse noxious or invasive weed seeds and propagates, resulting in the establishment of these weeds in previously weed-free areas. Several simple practices should be employed to prevent most weed infestations. The following practices should be adopted for any activity to reduce the costs of noxious weed control through prevention. The practices include: • Prior to delivery to the site, equipment should be thoroughly cleaned of soils remaining from previous construction sites which may be contaminated with noxious weeds. • Ifworking in sites with weed-seed contaminated soil, equipment should be cleaned of potentially seed-bearing soils and vegetative debris at the infested area prior to moving to uncontaminated terrain. • All maintenance vehicles should be regularly cleaned of soil. • Avoid driving vehicles through areas where weed infestations exist. REFERENCES Andrews, R., and R. Righter. 1992. Colorado Birds: A Reference to Their Distribution and Habitat. Denver Museum of Natural History, Colorado. Ball, L. G., K. Zyskowski, and G. Escalona-Segura. 1995. Recent bird mortality at a Topeka television tower. Kansas Ornithological Society Bulletin 46(4): 33-36. BLM. 1997. Record of Decision and Approved White River Resource Area, Resource Management Plan. United States Bureau of Land Management, Meeker, CO. Craig, Gerald R. 2002. Recommended Buffer Zones and Seasonal Restrictions for Colorado Raptors. Colorado Division of Wildlife, Denver. Kingery, H. E. 1998. Colorado Breeding Bird Atlas. Colorado Bird Atlas Partnership, Colorado Division of Wildlife, Denver. Klute, D. 2008. Recommended Buffer Zones and Seasonal Restrictions for Colorado Raptors. Colorado Division of Wildlife, Denver. Manville, A. M., II. 2001a. The ABCs of avoiding bird collisions at communication towers: next steps. In: R. L.Carlton, editor. Avian interactions with utility and communication structures. Proceedings of a workshop held in Charleston, South Carolina, December 2-3, 1999. Concord,CA: EPRI Technical Report; 85-103. Poole, A. (Editor). 2005. The Birds of North America Online: http://bna.birds.comell.edu/BNAI. Cornell Laboratory of Ornithology. Ithaca, NY. WestWater Engineering Page 4 of 5 June 2011 Righter, R., R. Levad, C. Dexter, and K. Potter. 2004. Birds of West em Colorado Plateau and Mesa Country. Grand Valley Audubon Society, Grand Junction, Colorado. Tordoff, H. B. and R. M. Mengel. 1956. Studies of birds killed in nocturnal migration. University of Kansas Museum Natural History Publication \0: 1-44. WestWater Engineering Page 5 of 5 June 2011 I, ) ) SPILL PREVENTION AND RESPONSE PLAN May 2010 Revision 6 Prepared By: HRL Compliance Solutions, Inc. 744 Hori zon Ct, Suite 140 Grand Junction, CO 81506 For: WILLIAMS COMPANIES, INC. PO Box 370 Parachute, CO 81635 Table of Contents I. Spill Prevention and Response Policy .................................................................................... 1 II. Purpose and Scope ................................ ................................................................................ 1 III. Plan Applicability ............................................................................................ ....................... 1 IV. Spill/Release Prevention ........................................................................................................ 2 A. Standard Prevention and Training ......................................................................................... 2 B. Areas of Special Concern .................................................................. ..................................... 3 V. Spill Management .......................................................................................................................... 4 A. Discovery ............................................................................................................................... 4 B. Containment ....................................... ................................................................................... 4 C. Notification (Williams/Contractors) .......................................................................... ............ 5 D. Response ............................................................................................................................... 5 1. Williams Spills ....................... ...................................................................................... 5 2. Contractor Spills ......................................................................................... ................. 6 E. Notification ............................................................................................................................ 7 F. Reporting ....................... ........................................................................................................ 8 G. Remediation ............................................................................. ............................................. 8 VI. Training ......................................................................................................................................... 9 VII. Spill /Release Costs and Invoicing ................................................................................................ 9 Table of Contents (cont'd) Appendix A Spill Management Flowchart Appendix B Containment Appendix B-1 Spill Response Station Locations Valley and Highlands Appendix B-2 Spill Response Station Inventory Appendix C Initial Notifications -Valley Asset Team Appendix C-l Initial Notifications -Highlands Asset Team Appendix D Response Appendix D-l Spill Investigation Letter Appendix E Federal and State Verbal Notification Requirements Appendix E-I Federal and State Verbal Notification Contact Infonnation Appendix E-2 Williams Notification Guidelines Appendix F Federal and State Written Reporting Requirements Appendix F-I Written Reporting Contact Infonnation Appendix G Wheeler Gulch and Beaver Creek Spill Prevention Equipment ii Williams E&P I. Spill Prevention and Response Policy Spill Response Plan May 2010 It is Williams' policy that its employees and contractors implement spill prevention and response plans in order to avoid and minimize the potential for spills and releases in the exploration and development of natural gas leases, in accordance with Federal and state regulations. This includes, but is not limited to the development and implementation of Best Management Practices (BMPs), training, and other actions that prevent, and take action to, manage spills and releases on Federal, state or private properties that are leased, managed, owned, or otherwise used by Williams. II. Purpose and Scope The purpose of this plan is to provide clear, comprehensive guidance and expectations for Williams employees and its contractors to prevent, mitigate, and manage spills and releases. This includes spilllrelease prevention, discovelY, notifications, response actions, reporting, and subsequent remedial actions (as applicable). Contractors are required to develop and implement their own spill prevention and response plans tailored to the scope of activities as described in their Master Service Agreement (MSA) and Request for Services (RFS), and assure their plan complies with the guidance and expectations set forth in the Will iams Spill Prevention and Response plan. Williams management and employees supervising natural gas exploration and development field activities, including contractor activities, are expected to have a working knowledge of this plan, pm1icularly the chain of command for notification and reporting of spills and releases. Williams contractors are responsible for their spi lls and releases, and those of their subcontractors, in accordance with their (MSA). In the event of a contractor spill, Williams responsibilities are limited to ensuring that contractors comply with applicable federal and state regulations and guidance (including safety). Corrective action will be implemented (by contractor) to avoid the potential for future spills. III. Plan Applicability This plan is applicable to all aspects of Williams exploration and development operations including, but not limited to, drilling and completion, production, gas plant operations, and pipeline operations. It is specifically applicable to any vehicles, facilities and equipment that use, store, transport, dispose, or otherwise handle or manage chemicals (MSDS-regulated chemicals), hazardous materials, E&P wastes (drilling muds, produced water, condensate), domestic waste (septic holding tanks), hazardous I ) ) Williams E&P Spill Response Plan May 2010 waste ( oil, grease) extremely hazardous substances, or any other Federal or state regulated substance or waste. Federal and State Spill Prevention and Management Regulations Despite implementation of prevention practices and BMPs, spills may still occur. In the event of a spill, regulations for spill management can be found in several Federal and state regulations, including but not limited to the following: ~ Clean Water Act (CWA): 40 CFR subchapter D parts 100-149 40 CFR 112 part 112 SPCC ~ Comprehensive Environmental Response, Compensation and Liability Act (CERCLA); 40 CFR part 305 and part 307 ~ Emergency Planning and Community Right-to-Know Act (EPCRA); 40 CFR part 355 ~ Toxic Snbstance Control Act (TSCA); 40 CFR subchapter R parts 700-799 ~ Resource Conservation and Recovery Act (RCRA); 40 CFR snbchapter I parts 260-299 ~ Clean Air Act (CAA); 40 CFR snbchapter C parts 50-99 ~ Hazardous Materials Transportation Act (HMTA); 49 CFR parts 100-185. ~ Federal Lands: 43 CFR 3162.5-1 Environmental Obligations. Paragraphs A, B, and C. Colorado state requirements for spills and releases are contained 111 the following regulations: ~ COGCC: C01l1plete Rnles 317b and 906 (and related sections) ~ CDPHE: 6 C.C.R. 1007-2 & 1007-3 ~ CDOT: 8 C.C.R. 1507-25 HMT 3 IV. Spill/Release Prevention Williams first and foremost priority is that it's employees and contractors take all reasonable measures and i1l1ple1l1ent BMPs to prevent both stationary and transportationrelated spills and releases from occnrring. Measures and BMPs include, but are not limited to the following: A. Standard Prevention and Training ~ Infonning and training employees, contractors, and subcontractors of actions required to avoid potential spill situations such as: • Checking for open or secured valves prior to, during and after loading/unloading operations • Monitoring tank levels (don't count on alanns) 2 Williams E&P Spill Response Plan May 2010 • Building benns around loading/unloading areas • Providing portable spill basins during fluid transfers • Checking equipment (tanks, hoses, valves) for deterioration and leaks • Servicing vehicles/equipment (oil changes, lubrication) responsibly • Maintaining vehicles to avoid accidents resulting in spills • Being aware of surroundings when backing or moving vehicles • Ensuring stable ground when placing equipment, tanks and pipelines ~ Providing quarterly training to new Williams and contractor personnel on how to avoid potential spill situations. ~ Provide annual training for all employees who have completed initial spill prevention training. B. Areas of Special Concern ~ Williams currently operates in certain areas which will require, due to increased risk from a potential release, a higher level of preventative action. This would include the following: • All areas south of the Colorado River • The 317B areas as outlined in the revised COGCC 300 series rules • Wheeler Gulch aka Wheeler Gulch Water Quality Protection Project ~ Actions that will require further due diligence on the part of Williams and it's contractors when operating in these areas would include: • Checking for seeps and springs within a 1/8 mile radius • Checking for surface water such as ponds within a 118 mile radius • Full understanding of what the new 317B areas are and knowledge of how to implement the Beaver Creek and Battlement Mesa Tactical Spill Response Plan • Ensuring that personnel are trained in the use of specialized spill prevention equipment as is currently installed in Wheeler Gulch and the Beaver Creek area. Personnel required to be trained in the operation of this equipment will include: 1. Williams Company Personnel 2. Contractor Personnel 3. Guard Shack Attendants (Wheeler Gulch) • Conducting periodic drills to ensure all personnel involved in preventing a release to Wheeler Gulch or Beaver Creek can operate the equipment 3 Williams E&P Spill Response Plan May 20 10 ) efficiently and effecti ve ly in order to minimize the impacts of a potenti al release. Procedures for operating the Wheeler Gulch and Beaver Creek spill prevent ion equipment are located in Appendix G. ) v. Spill Management For purposes of this plan, spill response and management addresses the major steps listed below. A flowchart illustrating an overa ll view of how Williams spill response and management operates is located in Appendix A. A. Discovery Discovery includes either actual or potential spills/releases, and in some cases situations that are not a spill or release, but someone has rep0l1ed it as such. In any event, it is impol1ant to confirm that an actual or potential spill situation has occurred before implementing spill response. If in doubt contact the appropriate spill response personnel as listed in Appendix C for ass istance prior to implementing this plan. IF A SPILL OR RELEASE PRESENTS AN IMMEDIATE THREAT TO HUMAN HEALTH, SAFETY, OR ENVIRONMENT, AND EVOLVES INTO OR IS ALREADY AN EMERGENCY SITUATION CALL THE APPROPRIATE WILLIAMS ENVIRONMENTAL TEAM LEAD IMMEDIATELY AND MOVE A WAY FROM THE RELEASE. B. Containment Containment, for purposes of this plan, means stopping the spill or release from increasing in volume, size or duration . The person/persons who di scover the spill should attempt to contain the spill only if safe to do so. Under no circumstances should fi eld personnel attempt to manage an unknown spill or situation without adequate training, personal protective equipment (PPE) or without exercising extreme caution. DO NOT ATTEMPT TO CONTAIN THE SPILL IF UNSAFE TO DO SO If there is no immediate threat to human health, safety or the environment, and you are convinced that the spill can be safely contained then personnel can: ~ Survey the area for personal safety ~ Stop the activity or process causing the spill/release ~ Warn others in the area, secure the scene of the spill/release ~ Isolate the affected spill area 4 Williams E&P Spill Response Plan May 2010 );> Initiate notifications as outlined in Appendix C and C-l ) );> Avoid direct contact with the spilled material );> Avoid inhalation of any gases, fumes, vapor or smoke -stay upwind );> Stay at safe location near the spill until an authorized spill responder arrives Spill containment options and materials used may vary depending upon the media affected. See Appendix B for containment options and materials that can be utilized. C. Notification (Williams/Contractors) The person discovering the spill must make initial notifications in accordance with Appendix C and C-l. When making the initial notifications, the information outlined in Appendix C and C-l must be provided. This information is also on the field notification cards that are provided by both the Valley and Highlands Asset Teams. *URGENT NOTIFICATION REQUlREMENT* For any petroleum product (oil, gas) spill/release that reaches live water, has the potential to reach live water, affects a drainage that flows to live water, or is in a 317b area; personnel must notify the appropriate Williams Env. Team Lead Immediately. (See Appendix C & CI) D. Response 1. Williams Spills Spills in which Williams is the responsible party, response actions will be determined by one or a combination of the following Williams designated personnel as outlined in Appendix C: );> Williams Operations Manager or Designee );> Williams Environmental Team Lead (Blaney-Valley; Gardner-Highlands) );> Williams Spill Contractor (HRL-Valley and Olsson-Highlands) The appropriate Williams Spill Contractor will perform the following response actions: I) Receive confirmation of containment actions 2) Direct further response actions as needed uSlllg approved spill response contractors 3) Assign a Spill Project Number/Charge Code for response contractor invoicing 4) Investigate using the Environmental Incident Investigation Form (Appendix D) 5) Perform required Federal and/or state notifications if required (Appendix E & F) 5 ) ) Williams E&P Spill Response Plan May 20 10 6) Report the status of the spill on the weekly Business Unit Spi ll Tracking Report 7) Forward the weekly report/updates through the appropriate spill response contractor to designated Williams personnel 2. Contractor Spills Contractors with a valid MSA are fully responsible for their spills. This includes all costs assoc iated with responding to, containment, notifi cation and rep0l1in g, remediation, and corrective actions necessary to minimize the potential for future spi lls. Williams or their environmental sp ill response contractor wi ll complete the necessary reporting to the appropri ate federal or state agency as outlined in Appendices E & F. Contractor Spill, response actions will be conducted in accordance with the Contractor's Spill Prevention and Response Plan. Contractors will be responsible for the following items if it is determined that they are the responsible party in the event of a spill or release: ~ A meet ing will be held with the responsible contractor following notification of the spill. The contractor's representative will be in a superv isory role and will contact the Williams spi ll response team lead: I. The contractor responsible for the spill will sched ule a meeting with the Williams spill response team lead within 24 hours of the spi ll. 2. The contractor wi ll bring their spill investigat ion form and it will be reviewed to assure completeness of the form. 3. In add ition a spill investi gation letter will be completed by the responsible contractor and it wi ll be submitted to the Williams spill response team lead within 3 days of the spill or release. A copy of this letter is located in Appendix D-l. 4. The contractor will be informed that the person or persons responsible for the release will attend the next avai lable spill prevention training. ~ All contractors must provide proof that they have a qualified environmental person in-house or an environmental consultant to manage spi lls. In the event the responsible pal1y has the abi lity to control a spill within the guidelines of this plan, the Williams' spill response contractor will sti ll provide oversight on Willi ams' behalf to assure the spill has been managed correctly and there are no repercuss ions to Williams as a result of the spi ll or release, if the sp ill is located on a Williams lease or property. 6 Williams E&P Spill Response Plan May 2010 Contractors are required to include and maintain a current listing of all chemicals, substances and wastes used in their operations (as well as the applicable MSDS sheets) in their Spill Prevention and Response Plan. E. Notification Federal and State verbal notification requirements for spills are based on two criteria: I. The type and volume of material spilled; and 2. Affected environmental media (i.e. soil, water) These materials are further sub-divided into two categories: I. Exploration and Production Waste (E&P Waste) such as produced water, condensate, or any other material that has been down hole; and 2. Non-E&P Waste such as fuels and oils. This would include materials such as diesel fuel, hydraulic oil, motor oil, and glycol The most common materials encountered when responding to spills and the associated notification volumes are outlined in Appendix E. For materials that are not listed in Appendix E, one must consult the MSDS sheet for the material spilled, determine if it is E&P or Non-E&P waste and make the appropriate notification if the reportable quantity is exceeded. Contact information for federal and state agencies is outlined in Appendix E-1. In order to provide further due diligence, Williams has notification requirements for spills, both company and contractor, with volumes that are less than the federal and state requirements. These notification requirements are in place to satisfy environmental obligations that the operator must comply with. These are set fOJ1h in Title 43 of the Code of Federal Regulations. Specifically they are found in Chapter II, Part 3160, subpal1 3162, Section 3 I 62.5-I Environmental Obligations. These are outlined in Appendix E-2. *URGENT NOTIFICATION REQUrREMENT* For any spill/release that migrates off the pad and reaches live water, or has the potential to reach live water, or affects a drainage that flows to live water; immediately notify the appropriate Williams Env. Team Lead Immediately. (See Appendix C) In addition, Williams uses the notification requirements as outlined in Appendix E-2 to track and document the cause of spills so procedural changes can be implemented to better manage spills and prevent them. 7 ) ) Williams E&P F. Reporting Spill Response Plan May 2010 Federal and State reporting requirements for spills, as with notification, are based on: 3. The type and volume of material spilled; and 4. Affected environmental media (i.e. so il, water) These materials as well are sub-divided into two categories: I. Exploration and Production Waste (E&P Waste) such as produced water, condensate, or any other material that has been down hole and; 2. Non-E&P Waste such as fuels and oils. This would include materials such as diesel fuel, hydraulic oil, motor oil, and glycol. Even though a spill may not require verbal notification it still may be rep0l1able. This includes all spills or releases within secondary containment structures; steel or earthen, lined or unlined. The most common materials encountered when responding to spills and the associated rep0l1ing volumes are outlined in Appendix F. For materials that are not listed in Appendix F, personnel must consult the MSDS sheet for the material spilled, determine if it is E&P or Non-E&P waste and submit the appropriate form or forms if required. Contact information for federal and state agencies is outlined in Appendix F-1. In the event that a spill or release results in significant damage to equipment, a Form 22 will be submitted to the COGCC by Williams' safety department within 10 days of the incident. G. Remediation In some instances, remediation may be required when a spill occurs. Whether or not a spill requires remediation is dependant on the type of material spilled, the volume spilled, and if the spill is contained on the pad by storm water controls or tank berms already in place. In addition remediation will be dependent on whether or not the pad is a working well pad or a well pad that has been reclaimed. Spills that migrate off any pad in volumes greater than those stated in Appendix E-2 will, in most cases, need to be remediated. The Williams environmental team lead, or the appropriate spill response contractor will make these determinations. *URGENT NOTIFICATION REQUIREMENT* For any spill/release that migrates off the pad and reaches live water, or has the potential to reach live water, or affects a drainage that flows to live water; personnel must notify the Williams Env. Team Lead Immediately. (See Appendix C). 8 Williams E&P VI. Training Spill Response Plan May 2010 It is required that all Williams and contractor personnel responsible for spill response and management complete Williams spill response training on an annual basis. At a minimum this includes Operations Managers, Field Supervisors, and EHS management and staff. It is strongly recommended that Williams and contractor personnel performing field response and remediation activities complete the 24-Hour HAZWOPER course and annual refresher courses. As stated in Section IV, training for new Williams and contractor employees will be offered on a quarterly basis. This can be arranged through HRL Compliance Solutions, Inc. Documentation that your employees have completed the necessary training will be provided. Williams and contractor employees that have documented proof they have completed the initial spill response training will be required to update their training annually. VII. Spill IRelease Costs and Invoicing All spills must be billed to the appropriate project charge code (i.e. AFE) regardless of where the spill actually occurred. For contractor spills, Williams will only pay the costs associated with oversight of the spill billed to Williams by its Spill Response Contractor. All other costs are the responsibility of the contractor causing the spill. This includes response costs by third party contractors to contain spills. Williams will not accept invoices from third parties for contractor spills. If a bill is inadvertently forwarded to Williams, the amount will be deducted from future payments and show as a credit to Williams. 9 AppendixA. Williams Spill Management Flowchart Wil liam s Spill Ma n age men t Flow C h a rt Spill Discove.red Inside or Oublcle '~"=='med=C=o~~ct~'oi~n~~ ~~me==M~~ __ _ Spill Re5ponse Splll Stat ion Locations Appendix B Material Spilled and Quantity Determine Meterilll Appendix B. Containment Williams, designated spill response, and contractor personnel involved in day to day operations at Williams facilities should carry some basic spill response materials with them at all times in order to contain spills and releases. However, as stated in section B of the Spill Prevention and Response Plan; DO NOT ATTEMPT TO CONTAIN THE SPILL IF UNSAFE TO DO SO Li sted below are some options that can be implemented for spill containment Containment matel"ials for spills/releases to soil and surface water I. Portable spill kits as stated above. Kits should contain • Absorbent pads • Absorbent Booms • Absorbent Clay • Shovels 2. Soil stockpiles located in strategic locations for belll1 construction of needed. 3. Vacuum truck company phone numbers for removal of free liquids from pads, roads, drainages, and surface water in the event free product or sheen is present. In the event that additional spill response materials are needed; Williams has placed six spill response stations at various locations. Six are located in the Valley and three are located in the Highlands. Figures I & 2 in Appendix B-1 depict the locations of Williams' Spill Response Stations. A list of materials and equipment that is stored in the spill response stations is included in Appendix B-2. Note: Each spill response station has an inventory checkout list that should be filled out prior to taking materials from the station. This better enables Williams to track items utilized during spill response. An example of the inventory checkout list is also included in Appendix B-2. Containment options for spills/releases to soil and surface water' [f it is determined that there is no immediate threat to human health and one is certain that the spill can be safely contained then the following options can be implemented; I. Attempt to stop the spill at the source such as closing valves, plugging holes, etc, 2. For releases to soil try to isolate the spill area by constructing earthen berms, placing booms or absorbent pads around the spill avoiding direct contact with the material spilled. 3. Remove free liquids if possible 4. For spills/releases that potentially or have impacted surface water attempt to stop the material released at the point where it enters the water. (i.e. eal1hen belll1s, absorbent booms/pads) then; 5. [n flowing water place booms/dikes at easily accessible downstream locations as close to the point where the spillirelease enters the surface water. 6. Have vac trucks dispatched to the location to remove any free product or sheen visible on the water. ) ) Appendix B-1. Spill Response Station Locations Valley and Highlands Legend Spill Response Station Locations • Spi ll Response Station --Existing Road o ."''''IOCIB\PICI _ P-'''OO7'6_S''''lRMoonooS ....... \S<IoI_ .. ''''" """"""" 9N2O' n""" • . "' ..... 0.5 waAE .~ s 2 Miles I.rll·~ rrllllamS. if~ ) ) Legend • Spill Response Station Exis ting Road Highlands Spill Response Station Locations o nIM'lll'lIa'~roS . ~ 4 Miles Appendix B-2. Spill Response Station Inventory Spill Response Station Inventory List All valley and Highlands spill response stations will at a minimum contain the following items with the exception of the GV 82-5 and the RU 31-12V stations which will have additional spill response materials as noted below. 3-Cases I-Case I-Case 2-Cases I-Case 2-Boxes I I I-Bag 2 2 15 I I-Roll I-Bundle I 6 2-Rolls 2-Rolls 3 I 2 I 4 I-sheet Note: 17" x 19" x 3/8" Oil absorbent Pads (12 per case) 7" W x 15" L Oil Absorbent Pillows (16 per case) 3" x 4' Mini Booms (30 per case) 3" x 8" Oil Absorbent Booms (6 per case) 5" x 10' Oil Absorbent Booms 36" x 56" 3 mil Trash Can Liners Large Tyvek Coverall Extra Large Tyvek Coverall Size 10 Green Nitrile Gloves (12 pairs per bag) Round Point Blade Shovels Square Point Blade Shovels 5-112 foot Steel Fence Posts Fence Post Driver 16 GA Tie Wire Wooden Stakes 20' x 20' Liner 28" Traffic Cones Duct Tape 6 mil 20' x 100' Plastic Sheeting 20 lb. Fire Extinguishers Metal First Aid Kit 55 Gal. Poly Drums (Drums contain absorbent booms, pillows and pads) 55 Gal Steel Drum 5-gallon buckets with lids \1," plywood The PA 22-4 spill response station will contain 2-12" x 50' river booms for spills that could potentially impact the Colorado River. It will also contain a small trash pump and associated plumbing to pump water if necessary. The Beaver Creek spill response station will contain an additional Case of 5" x 10' oil absorbent booms. (hw!lfM!r fiM) Spill Response Station Inventory List All Valley and Highlands spill response stations will at a minimum contain the following items with the exception of the PA 22-4 and the Beaver Creek stations which will have additional spill response materials as noted below. 3-Cases i-Case I-Case 2-Cases I-Case 2-Boxes I ea. I ea. I-Bag 2 ea. 2 ea. IS ea. 1 ea. I-Roll I-Bundle I ea. 6 ea. 2-Rolls 2-Rolls 3 ea. I ea. 2 ea. I ea. 4 ea. I-sheet Note: Incident Location Quantity/Initialsl Date IT" x 19" x 3/8"' Oil absorbent Pads (12 per case) 7" W x IS" L Oil Absorbent Pillows (16 per case) 3" x 4' Mini Booms (30 per case) 3" x 8" Oil Absorbent Booms (6 per case) 5" x 10' Oil Absorbent Booms 36" x 56" 3 mil Trash Can Liners Large Tyvek Coverall Extra Large Tyvek Coverall Size 10 Green Nitrile Gloves (12 pairs per bag) Round Point Blade Shovels Square Point Blade Shovels 5-1/2 foot Steel Fence Posts Fence Post Driver 16 GA Tie Wire Wooden Stakes 20' x 20' Liner 28" Traffic Cones Duct Tape 6 mil 20' x 100' Plastic Sheeting 20 lb. Fire Extinguishers Metal First Aid Kit 55 Gal. Poly Drums (Drums contain absorbent booms, pillows and pads) 55 Gal Steel Drum S-gallon buckets with lids Y2" plywood The PA 22-4 spill response station will additionally contain 2-12" x 50' river booms for spills that could potentially impact the Colorado River. It will also contain a small trash pump and associated plumbing to pump water if necessary. • The Beaver Creek station will contain an additional Case of 5" x 10' oil absorbent booms. Appendix C. Initial Notifications (Williams/Contractors) Piceance Valley Asset Team Contacts for Emergencies/Spills/Incidents Piceance-Valley Asset Team Contact Emergencies/Spills/Incidents Name Title/Position Cell # Other# Operation Management Scott Bradv DriliinQ/Completion Supt 970-270-9187 970-523-0332 Steve Harris Completions Supt 970-948-4312 970-434-3777 Brad Moss Production/Facilities Supt 970-987 -1737 970-625-5221 Eric DeKam Production Supervisor 970-948-4303 970-285-1172 Health & Safety Kevin McDermott Safety Spec Team Leader 970-309-1195 N/A Delbert Dowling Safety Coord. Sr. -Drilling 970-589-5736 N/A Brian Ginqrich Safety Coord. Sr. -Production 970-216-6820 N/A Greg Anoia Safety Coord . Sr. -Plants 970-216-1 387 N/A Environmental Karolina Blaney Spills /Incident Lead 970-589-0743 970-201-5227 Kent Rider Environmental Lead -Kokopelli 970-250-7328 970-640-5266 Jason Raley Environmental Lead -Parachute /Rulison 970-210-4351 970-231-0554 Mike Shoemaker Environmental Lead -GV /Red Point 970-250-5778 970-263-2769 Land Sandy Hotard Field Land Manager 970-210-9709 970-256-8939 Bryan Hotard Landman 970-361-2006 970-985-4904 Public Relations Susan Alvillar Communication Spec. III 970-216-3878 970-241-4430 Donna Gray Communication Spec. II 970-589-1557 970-945-1023 Contractors Mark Mumby HRL Comp (Spills/Releases) 970-260-1576 970-243-2209 Walt Proulx MB Construction (Spill Response) 970-985-1372 970-858-8546 Gene Thurston MB Construction-Only if can't Reach Walt 970-216-0642 N/A Pat Brown Roustabouts (Spill Response) 970-210-9051 970-243-8519 Tom Kirkpatrick KERSI (Storm water) 970-270-7687 683-1777 -Blake Appendix C 1. Initial Notifications (Williams/Contractors) Highlands Asset Team Contacts for Emergencies/Spills/Incidents rUrI/~""l·a~mS . ~ Piceance HIGHLANDS Parahute Field Office Contacts Allen Point, Ryan Gulch, Trail Ridge and North Logan Wash I ) REV: 1/22120 10 ) IParactlute Stations: IKLII'S')o Stations: Piceance BARGATH Gas Plants, Compressor Stations and Gathering Systems I REV: 1122/2010 V NAME OF CALLER WITH CALL BACK NUMBER IMMEDIATE RESPONSE AND MITIGATION IMPACTED AREAS LOCATION OF INCIDENT TYPE OF MATERIAL RELEASED ESTIMATED QUANTITY RELEASED Appendix D. Response Williams Environmental Incident Investigation Form W:Il fla~ms . ENVIRONMENTAL Location ID : ~-;:::::----) Field T R S Qtr/Qtr INCIDENT I nvestigation Date: Lead: INVESTIGA TlON Incident Log Entry: (FIELD WORKSHEET -NOT OFFICIAL) Occurred: Time: Discovered By: Company: Phone: INCIDENT TYPE RELEASE TYPE LANDS AFFECTED MEDIA AFFECTED BIOTA AFFECTED ( ) Facility ( ) E&P Waste ( ) Private ( ) Land/Soils ( ) None ( ) Transportation ( ) Non -E&P ( ) Federal ( ) Air ( ) Plants i ) State ( ) Waters (U .S.) ( ) Wildlife -Game ( ) Other: ( ) Other: ( ) On-Lease ( ) Wetland/Riparian ( ) Wildlife -T&E i ) Off-Lease ( ) Ground water ( ) Wildlife -Non-game SIGNIFICANT THREAT TO HUMANS OR ENVIRONMENT ( ) NO ( ) YES -Implement Emergency Response INCIDENT DESCRIPTION (How incident occurred, type of effluent, emissions, chemical, etc.): ESTIMATED VOLUMEIQUANTITY OF RELEASE: RESPONSIBLE PARTY: COMPANY: CONTACT: PHONE: WILLIAMS CONTACTS: Parachute: ( ) Blaney ( ) Gardner RESPONSE ACTIONS Response Contractor -1: Date: Time: Response Contractor -2: Date: Time: Environmental Contractor Contacted I Samples Required: I COCs: ( ) Yes ( ) No ( ) Yes ( ) No DESCRIPTION OF ACTIONS (EquipmenUMaterials Used, containment, soils removed, water removed, etc.) Terminated By: Date: Time: SURFACE OWNER I REPORTING ACTIONS Surface Owner Notification Re Contacted B Date AGENCY NOTIFICATION I REPORTING ACTIONS AgencylOwner Notification Required Reporting Required Fed -BLM Y N Date: Y N Date: COGCC Y N Date: Y N Date: CDPHE Y N Date: Y N Date: NRC Y N Date: Y N Date: REMEDIAL ACTION REQUIRED: ) NO ( ) YES: FORM 22 REQU I RED: ) NO ( ) YES: "Ifcy--e'-"s" -c'-o""n-:t:a""c-:t:-;H-C;:SC;:E:-f;co-r-s-u-;b--m-::it:-ta-;-I o-Cf;-t;:h-e-;::-F-or-m-c2"'2;------ Appendix D 1. Response Williams Spill Investigation Letter (Date) (Contractor's Address) Dear Mr or Ms. IJU~"·~ rr/.. lams ~ WILUA"IS PRODUCTION RMT CO'1PANY 1058 County Road 215 P.O. Box 370 Parachute, Colorado 8 1635 office (970) 285-9377 fax (970) 285+9573 The following information is required to be submitted to Williams within 3 business days of the date of the spill to demonstrate compliance with the tenns and conditions of your MSA regarding spills. a. The date and time of the spill b. The date, time Williams was notified c. The name of the Williams' person contacted d. The name of the responsible supervisor e. The name of the responsible individual f. The name of your Environmental Consultant g. Description of what was spilled h. The cause of the spill I. The volume of the spill J. Media Affected (soil, live water, drainage, vegetation) k. The location of the spill on a 1:24,000" to po map or aerial photo, with GIS coordinates. I. Photos of the spill m. Actions taken to stop and contain the spill n. Planned remediation o. Storage, treatment and disposal of spill waste p. Communication with third pal1ies to include law enforcement, other agencies. q. A copy of your Spill Prevention and Response plan r. Evidence that the responsible individual and supervisor are trained in spill prevention and response. s. Planned actions to prevent fUl1her occurences Spill Prevention and Response is critical to Williams reputation with regulatory agencies, landowners and the communities in which we operate. Repeated spills and releases that may be deemed as negligence by Williams or regulatory agencies may result in revisions to, or tennination of, your MSA with Williams. (Mike Gardner or Karolina Blaney) Williams Spill Program Lead ) ) ) cc: M. Paules E. Joyner M. Mumby (HRL) T. Dobransky (Ol sson) Operations Manager IAI~II·~ rrllllamS V~ WILLIAMS PRODUCTION R:\1T CO''lPANY J058 County Road 215 P.O. Box 370 Parachute, Colorado 8 1635 office (970) 285-9377 fax (970) 285-9573 Appendix E. Federal and State Verbal Notification Requirements APPENDIX E -FEDERAL AND STATE VERBAL NOTIFCATION REQUIREMENTS E&PWaste Minimum Amount to Notification Chemical Media Affected Report Requirement NRC COGCC CDPHE BLM RQ (Verbal) Surface Any Amount Impacting Immediately X X X X water/Groundwater Water (FEE/FED) >5 bbls but <20 bbls (FEE) None Condensate/Crude Oil >20 bbls (FEE) 24 Hours X Soil > I 0 bbls but <100 bbls (FED) 24 Hours If>20 bbls > I 00 bbls (FED) 24 hours X X Surface Any Amount Impacting Immediately water/Ground water Water(FEE/FED) X X X X Produced Water/Flowback >5 bbls but <20 bbls (FEE) None Water >20 bbls (FEE) 24 Hours X Soil > 10 bbls but <100 bbls (FED) 24 Hours If >20 bbls > I 00 bbls (FED) 24 Hours X X Non E&P Waste Surface Any Amount Impacting Immediately water/Ground water Water (FEE/FED) X X X Diesel Fuel/Gasoline > 25 gallons (FEEIFED) 24 Hours X Soil >10 bbls but <100 bbls (FED) 24 Hours X > I 00 bbls (FED) 24 Hours X X Surface Any Amount Impacting Immediately water/Groundwater Water (FEE/FED) X X X Waste Oil!Lube Oil! Hydraulic Oil > 25 gallons (FEE/FED) 24 Hours X Soil > I 0 bbls but < 100 bbls (FED) None X > I 00 bbls (FED) 24 Hours X X Chemical Media Affected Minimum Amount to Notification NRC COGCC CDPHE BLM Report Requirement RQ (Verbal) Surface Any Amount Impacting Immediately X X water/Groundwater Water (FEE/FED) Ethylene Glycol 1,000 lbs. (FEE/FED) 24 Hours X Soil > 10 bbls but I 00 bbls (FED) 24 Hours X Surface Any Amount Impacting Immediately X X water/Groundwater Water (FEE/FED) Methanol > 25 gallons (FEE/FED) 24 Hours X Soil >10 bbls but <100 bbls (FED) None X > 100 bbls (FED) 24 Hours X Surface Any Amount Impacting Immediately X X water/Groundwater Water (FEE/FED) Methyldiethanolamine 1,000 Ibs. (FEE/FED) 24 Hours X Soil > I 0 bbls but <100 bbls (FED) None X > I 00 bbls (FED) 24 Hours X Footnote: I. Notification requirements that are listed above are for the most common chemicals encountered in day to day Williams operations. 2. For chemicals not listed consult the MSDS for the chemical of concern or call a Williams environmental team lead. 3. Reportable quantities that are reported by weight need to be converted to a barrel or gallon equivalent for BLM notification requirements. 4. See attachment I for contact information. X 3 3 X X X X 3 3 X Appendix E-l. Federal and State Verbal Notification Contact Infonnation Public Safety Officials and Government Agencies Public Safety Notification -Verbal Fire ............................................................................................................... ............................... 911 Police/Sheriff ............................................................................................................................... 911 Colorado State Highway Patrol Hazardous Waste Division .............................. 970-858-2291 Government Agency Notifications -Verbal National Response Center ................................... ..................................................... 1-800-424-8802 (24 hrlday _ 7 days/week) Colorado Department of Natural Resources ............................................................... 970-625-2497 Oil and Gas Conservation Commission (24 hr/day) Colorado Department of Public Health and Environment.. ..................................... 1-877 -518-5608 24 Hour Spill Response Colorado Department of Public Health and Environment.. ........................................ 303-692-3500 Water Quality Control Division Garfield County Health Department ........................................................................... 970-625-5200 Garfield County Emergency Communications ........................................................... 970-625-8095 U.S. Department of Interior, BLM, Colorado River Valley Field Office ................... 970-876-9000 U.S. Department of Interior, BLM, White River Field Office ......................... ....... 970-878-3800 U.S. Department of Interior, BLM, Grand Junction Field Office ............................. 970-244-3000 Appendix E-2. Williams Notification Guidelines Williams Company and Contractor Notification Requirements As stated in section E. of this plan, Williams has established threshold values on materials spilled or released that are more stringent than the state or federal requirements in order to provide additional due diligence. In addition, Williams utili zes this data to track and identify potential trends to implement procedural changes which can better manage spillireleases. The Williams reporting requirements area as follows; I. Any spill ofE&P waste (produced water, condensate) greater than I banel and Any Spill of non-E&P waste (Diesel fuel, motor oil) greater than 5 gallons, including those within containment, needs to be reported to the proper Williams environmental team lead in order to provide the due diligence requirements set fOl1h in Section 3162.5-1 of the Code of Federal Regulations. 2. Any spill of E&P or non-E&P waste in the quantities li sted above that has migrated off-site needs to be rep0l1ed to the appropriate Williams environmental team lead Immediately. As stated above; if you are unable to contact the designated Williams personnel listed in Appendix C, contact the appropriate spill response contractor (HRL Valley/Highlands) so any notificationirepOl1ing that may be necessary can be completed within the designated repOl1ing time. *URGENT NOTIFICATION REQUIREMENT* For any spill/release that migrates off the pad and reaches live water, or has the potential to reach live water, or affects a drainage that nows to live water; immediately notify the Williams Drilling/Field Lead Supervisor and the appropriate Williams Env. Team Lead Immediately. (See Appendix C) ) ) Appendix F. Federal and State Written Reporting Requirements APPENDIX F -FEDERAL AND STATE WRITTEN REPORTING REQUIREMENTS E&PWaste Minimum Amount to Reporting Chemical Media Affected Report Requirement NRC COGCC CDPHE BLM RQ (Written) Surface Any Amount Impacting 10 days (State) water/Groundwater Water (FEE/FED) IS days (Fed) X X X >5 bbls but <20 bbls (FEE) 10 days X Condensate/Crude Oil >20 bbls (FEE) 10 days X Soil >10 bbls but <100 bbls (FED) 10 days (State) If> 20 15 days (Fed) bbls X > I 00 bb1s (FED) 10 days (State) X X 15 days (Fed) Surface Any Amount Impacting 10 days (State) water/Groundwater Water (FEE/FED) 15 days (Fed) X X X >5 bbls but <20 bbls (FEE) 10 days X Produced Water/Flow back >20 bbls (FEE) 10 days X Water Soil >10 bbls but <100 bbls (FED) 10 days (State) If> 20 IS days (Fed) bbls X > I 00 bb1s (FED) 10 days (State) X X IS days (Fed) Non E&P Waste Surface Any Amount Impacting water/Groundwater Water (FED) 15 days X X Diesel Fuel/Gasoline > 25 gallons (FEE/FED) 10 days X Soil > I 0 bb1s but I 00 bbls (FED) IS Days X X Surface Any Amount Impacting IS Days X X water/Ground water Water (FED) Waste Oil/Lube Oil > 25 gallons (FEE/FED) None X Soil > I 0 bbls but 100 bbls (FED) IS days X X Minimum Amount to Notification Chemical Media Affected Report Requirement NRC COGCC CDPHE BLM RQ (Verbal) Surface Any Amount Impacting 15 Days X water/Groundwater Water (FED) Ethylene Glycol 1,000 Ibs. (FED) None Soil > 1 0 bbls but <100 bbls (FED) 15 Days > 100 bbls (FED) 15 Days X Surface Any Amount Impacting 15 days water/Groundwater Water (FED) Methanol > 25 gallons (FEE/FED) None Soil > 1 0 bbls but <100 bbls (FED) None >100 bbls (FED) 15 Days Surface Any Amount Impacting water/Groundwater Water (FED) 15 Days Methyldiethanolamine 1,000 Ibs. (FED) 15 Days Soil > 10 bbls but <100 bbls (FED) None > 100 bbls (FED) 15 Days Footnote: I. Reporting requirements that are listed above are for the most common chemicals encountered in day to day Williams operations. 2. For chemicals not listed consult the MSDS for the chemical of concern or call a Williams environmental team lead. 3. Reportable quantities that are reported by weight need to be converted to a barrel or gallon equivalent for BLM reporting requirements. 4. See attachment I for contact information. 5. Notify the Colorado State Highway Patrol for transportation related spills involving hazardous materials. X 3 3 X X 3 3 X 3 3 X Appendix F -1. Written Reporting Contact Information Government Agency Reporting -Written Colorado Depaltment of Public Health and Environmenl... ....................................... 303-692-3500 Water Quality Control Division 4300 Cherry Creek Drive South Denver, Colorado 80222-1530 Colorado Department of Natural Resources ............................................................... 303-894-2100 Oil and Gas Conservation Commission 707 Wapiti Ct., Suite 204 Rifle, Colorado 81650 Colorado Public Utilities ............................................................................................. 303-894-2000 1580 Logan Street, 2nd Floor Denver, Colorado 80203 U.S. Department of Transportation ............................................................................. 202-366-4595 Office of Pipeline Safety Infonnation Resource Manager Washington, DC 20590 (Gas Distribution -Form RSPAF 7100.1-1) Gas Transmission and Gathering -Form 7100.2-1) U.S. Depmtment of Transportation ............................................................................. 720-963-3161 Office of Pipeline Safety 12300 West Dakota Avenue, Suite 110 Lakewood, Colorado 80228 (To Obtain FOlms RSPAF 7100.1-1 and 7100.2-1) Appendix G. Williams Emergency Response Control Valve Operation and Notification Procedures Emergency Response Control Valves Standard Operating Procedures As part of the Williams Production RMT Company (Williams) Spill Mitigation Project, the following protocols and procedures have been implemented in a forward attempt to mitigate impacts to the from an unanticipated and undesirable spill or release event. This includes releases that have impacted or have the potential to impact Wheeler Gulch and Beaver Creek. Williams has installed several Emergency Response control valves in Wheeler Gulch and Beaver Creek. The locations of the Emergency Response Control valves in Wheeler Gulch and Beaver Creek are included as Attachments A and B to this Appendix. The standard operation of the valves and contact information are outlined as follows; Step 1. In the event of an actual or potential release, personnel involved in mitigating and containing the release must proceed to the nearest Emergency Response Control Valve (see Attachment A or B, as noted above) and tum the wheel on the valve in a clockwise direction in order to completely restrict the flow of water. If there is more than one person present, one person should perform the tasks identified in Step 1 and the other should proceed to step two; perfonn tasks concUlTently. Step 2. Personnel on-site must then notify an "Emergency Contact Company Representative". This includes personnel listed on both the Williams Highlands and Valley asset teams Emergency Contact Cards or as listed in Appendices C and C-l of the Williams Spill Prevention and Response Plan. With specific regard to Wheeler Gulch -security personnel at the lower Wheeler Gulch guard shack must also be contacted, in addition to the contacts listed on the signage located at each of the three Emergency Response Control Valve locations. Step 3. Water levels on the upstream side of the control valve must then be monitored to ensure water levels DO NOT overcome the roadway. Step 4. Tum the Emergency Response Control Valve wheel counterclockwise to equalize the water levels on the upstream side of the valve; maintain a static water level. Step 5. Install/utilize spill response materials such as absorbent booms and pads to skim the water surface in order to remove oily residue or sheen that may be present. Spill response materials (inventory provided in Appendix B-2) may be accessed and are located within the Williams Spill Response Stations. To identify the station most proximal to your location, refer to Appendix B-1. Step 6. As stated above, emergency contact information is also located on signage that is located at every Emergency Response Control Valve location. In addition, instructions in regards to the operation of the valves are on the signage as well. Attachment A Wheeler Gulch Emergency Response Control Valve Locations Legend (9 Slide Gale o Existing Pad --Existing Road Wheeler Gulch Spill Response Emergency Control Valve Locations 0 N WeE s 500 1,000 ) ) Willffrris. ~ 2,000 Feet Attachment B Beaver Creek Emergency Response Control Valve Locations Beaver Creek/Flatiron Mesa Field Legend Williams Well Pad Hydrology Spin Response Station ,........,...., Ditch/Cannal _ . __ .. -Intermittent Stream Beaver Ck Flood Gates __ Perennial Stream 1/2 Mile Stream Buffer 500 1.000 1,500 Feet 'Miles 0.25 ) I ./ROAn CONSTRI.:CTIO:-l ANI> MAINTENANCE AGltEEMENT '111is Road Construction and Maintenance Agreement (this "Agreement") is entered into effecti\'C as of the I ST day of November, 2005 (the "Effectivc Date") by and among Petroleum Development Corporation ("PDC"), Berry Petroleum Company ("Berry"), PGR Partners, LLC ("POR Partners"), Teton Piceance LLC ("Teton Piceance"), Mamthon Oil Company ("Mnmthon") and Willianls Production R.\IT Comprul)' ("\villiru115," and collectively with I'DC, Berry, POR Partners, Tcton Piceance, and Marathon, the "Participants"), Chevron Shale Oil Company (fikJa Chevron Texaco Shale Oil Company), u division of Chevron USA Inc. ("Chevron") nnd Oarden Gulch, LLC ("Operator"). Participants and Operator are herein referred to individually as a "I'a:1y" and collectively as the "Parties," RECITALS A. The Parties wish to sct forth in this Agreement the right.~ lind obligations of the Participants and Operator with regard to the construction lllld maintcnance of Garden Oulch Road (as more specifically describcd on Exhibit ",v' attached hereto, the "Road"). The Road is to be a private rond, o\\1lcd by Chcvron and licensed to each Participant, that \\;11 provide the Participants with access to and egress from certain wells, gas pipelines <L1d gathering systemR, water pipelines, trulks, compressors and other similar oil and gas exploration, production, gathering and transportation c{juipmcnt and facilities on the 1!l.1d. IOC<lted ill Garfield County, Colorado WId more specifically described 011 Exhibit "n" attached hereto. B. Chevron is a party to this Agreement sale:)' for the purpose ofprovidillg its IITitlcn consent to, aJTl0ng other mlltters, the coastruction amI maintcnlll1Cc of the Road by Operator, to elicit l'urticipa!1!'s contribution toward the cost of the Road, and to each Participant's license to IUld use oftl:e Road, in each ease pursuant to Sections 2(d), (I) Ill1d (h) of the letter agreement b)' and bctwcen Chel'lon and PDC dated JWlUUry 17,2005, attached hereto as Exhibit "C" (the "Chcvron/PDC Agreement"). AGREEMENT I. Construction m:d Ser,\'iccs. Subject to the tenns and conditions hereof, Participants hereby engage Operator to perfonn the construct:on and maintenance of the Road (the "Services") as described on Exhibit "D" attached hereto. 2. IF~ This Agreement shall conunence as of the Effective Date and shall contim:e for the dU:1ltion of the life of the Road; provided, however, that, any Party which clccts either to not PIIY, or fails to timely pay, its Sharing Percentage of the Road Expenses (as both of such tenns arc defined ill E;.,:hibit "E" attached hereto) shnllnot be a 1'1I11y to this Agreement, and c..ot.ooo9C! such Party's license and right to use the Road shall be deemed tenninatcd, from and after the d,ltC of slich election or crouch. In such event, the remaining Parties agree to renegotiate the Sh~ring Percentages of the Parties, tnking into account such tcnninatioll. 3. I'!lVIlWnt for Serviccs. Participants shall po)' Opemtor to pcrform the Services in accord once with the schedule set forth in Exhibit "E". 4. MOllner of PerfOnl13ncc. Operator shall pcrfonll the Services \\;th diligct~c<! , in a workmanlike mauncr, and ill accordance with industry standards, applicable lu\\'s alld contracts. 5. Selection ~llractors. The number of employees or contmetors used by Operator ill performing Services Ilcreullder, their selection, and the hours of labor and the compensation for the Services pcrfonned shall be detennined in the sole discretion of the Operator. G. Insurance, During tbe term of this Agreement, Operator agrees to maintain on behalf of itself and the Participants the insurance coverage described in "Exhibit "I''' attached hereto. Eoch Participant s!mll be an additional named insured on each such insurance policy. Opemtor shall furnish proof of such insurnncc to Participants upon request. 111e policies for such insurance shall not he cancelled without Participants' prior written approval. Such insurance shall be primary to any of Participallts' insurance for Jlurposes of this Agreement. 7. Entire A~rccn!j:jltl"mcl1dmeJlls. This Agreemcnt rule! any ExhibiL> hereto constitute tile entire agrecment among the Parties cOllcemiJlIl the Services nnd sUJlersede all prior ngrccmcnts. undcrstm~din gs or representations among the Parties in re spect of such Scrvic('s. ;-.J'() modification of or amendment to this Agreement will be cffective un less it is in \\Titing and signed by all of the Parties hereto. S. !mkJlendcnt Contractor. 1.11 the pcrfoll1mnce of the Services, Opcmtor sholl be an independent contntctot', with the authority and right to direct and control nil of th~ details of the Services, Participants being interested only in the results obtained; provided, itowcver, tlmt (Ill or the i)artid panl~ shall h~ve a right to inspect and comment on such Scrvices. i'nnicipallls slmll havc nO right 01' authority to supervi se or give instructions to Opemtor's employe rs or contractors. which shall at nil times be Ilnder the sole sllpervision and control ofOporalnr. 9. Relations of the Parti es. It is not the intention of any of the Panks hereto to erente a partncrsh ip or joint venture, and neither this Agreement nor the operations hereunder shall be constmcd us creating such a relationship. 10. Taxes. Operator sl:nll be responsible for payment of nil federal, state, and local taxes .elnting to the compensation it receives for the Services he reunder. Participants shaH not withhold nny tnxes from sllch compensation, nor remit sllch amollnts to any govell1111cntnl auth ori tie s on hellalf of Operntol'. I'tll1hcl', Participants shall not make nny ptl)111ents as an cmployer to any federal or state govemment or otlter govenUllcnto! taxing authority on bch31f of Ol'crntor for purposes of unemploymcnt compensot ion. 2 11. Jndcmnific;!!ijlll, Operator shall be liable for, and shall illdemnify and hold harm Jess each Participant, its parent, subsidiaries and affiliates, and their respectivc directors, oOiccrs and employees (collectively, "Indenlllilccs"), from and against any nnd all losses. co,ts and expclIScs, claims or damages sunered or incurred by ony Indemnitee hased upon or arising out of Operator's breach of tltis Agreement or gross negligence or willful misconduct in the pcrfomlance of the Serviccs hereunder by Operator or any third Jla!1y, Without n!1"ccting the foregoing indemnification obligntioll, and subject to the tenllS and conditions of the applicable construction and other agreements entered into by Operator with third parties for the pcrfonnuncc of the Sen-ices, Operator agrees to transfer and assign, to the extent assignable, to each Participant tile benefit of nr,d the right to enforce any indcnUlificntion provisions hcncfiting Operator under such third pal1)' agrecments ill proportion :0 the Sharing Perccntages scI forth on Exhibit "E", 12, ~otices, Any notice (including any in\'oicc 01' statcment) to n Party under this Agreement shall be deemed to be given upon receipt by electronic mail, facsimile, by personal delivery or courier or by prepaid lllail addressed as follows: Garden Gulch, LI.C 3801 Carson Avenue Evans, Colorado 80620 ,\!tclllion: Dewey Gerdom Phone: (970) 506·9272 Fa.x: (970) 506·9276 E·mail: dcwc"t(l:pd e· r()ch~:u) 1l1£Qill Petroleum Development Corporation 3801 Carsoll Avenue Evans. Colorado 80620 AHclltion: Dewey Gerdom Phone: (970) 506·9272 Fa.x: (970) 506·9276 E-mail: dc\\.cyt(l:pdc-rock).l11tn.com 3 Den), Petroleulll Company 950 Seventeenth Street, Suite 2400 Denver, Colorado 80202 Attention: Joseph D, Stewart Phone: (303) 633-1819 Fax: (303) 633-1827 E-mail: jg;;!iilbrv.colll PGR Panncrs, LLC 370 Sevcnteenth Street, Suite 4300 Denver, Colorado 80202 Attention: Randy Amold Phone: (303) 575-0329 Fax: (303) 575-0429 E-mail: ffi!ldy(li)dcltflpctW.cOIll Teton Piceance LLC 410 Seventeenth Street, Suite 1850 Denver, Colorado 80202 Attcntion: Tobey Schultz Phone: (303) 565-4600 Fax: (303) 565-4606 E-mail: amschllltztiiJ!.t;~Oll-cncrgy.conl Marathon Oil Company 5555 San Fclipc HoustOll, Texas 77056 Attcntion: KClUlcth W. Tntarz),n Phone: (713) 296-2423 Fax: (713) 296-3397 E-mail: k\\1!l.tarzynjilmaratllrctloil.col11 Williams Production RMT Company ISIS Arapahoe Street Towcr3, Suite 1000 DCllver, CO 80202 Attention: Jim Schaff Phone: (303) 606-4283 Fax: (303) 629-8281 E-mail: iim.scl\afYlQ(lyi1Iianls_.com Notice sl1o11 be decmed cflcctivc on the date of actual n~ccipt. -I ) 13. Assignillent. This Agreement is 1I0t assignable by any of the Partie> without the prior written consent oftlle other Parties, which consent sholl not he IlI\rcasonllbly \\ithheld . 14. GOl'cming Lnw. '11lis ,\greclllcnt shall be govcrned by ond eonstrucd accorcing to the laws of the Stote of Colorado, excluding conllicts of lal\'s principles. Eoch Porty expTCssly consents to the personal jurisdiction of the state and federal courts locoted in Denver, Colomdo, for nny lawsuit filcd against it arising under this Agrcement. 15. (\lIomcv Fees. In the event of a dispute hereunder, eoch Pany shall he responsible for its 0 " 11 attorney's fees and costs. 16. illcrnbilit)' and Substitution of Tenns. If one or more of the provisions in th is Agreement arc deemed unenforcenble by low, then tlte remaining prol'i sions \\; 11 continue in full force nnd cffcct. With resp:ct to nn)' sllch unenforceoble provision, an cnforceable provision, which most close ly meets tbe intcnt of the Panics will be deemed to be sub stituted. 17. Binding EO-eel. This Agreement sbnll he deem cd a covcn:mt ruuning with the land upon which the Road is located, shall be binding upon, 31!d shall inure to the benefit of, the Parties hcreto and, subjcct to Section 13, to tbeir rcspeetive Sl!eccssor,; and ass igns. 18. Wniver.:-.1o wnh'erofan)' breach of this Agreement shall he a waiver of any preccding or sllceceding breneh. ~o waivcr of all)' right under this Agreement shnll be construed as a \\'~h'er of any other ri ghts. 19. No n,iru Pnnv Bene fici aries. Except as cxpress ly sct fortll herein, this Agreement shall not provide any bcnefit to all)' third part)' or entitle ttll)' third party to nny claim, cause of action, remedy or right of any kind, it being the illtent of the Pn rtie ~ thnt this l\grcClllent shnll otherwise notoe cOllstmcd us n third pnt1y beneficiury contmct. 20. COlllltelllnrts nnel Electronic ivlediu. This Agreement may be executed in counterports, ench ofwhieh shall be decmed an original instrlllnent, but which togcther shall constitute but one mId the same instrument. AllY countcrp;trt may be dcli"er~d hy facsimile, email or other electronic medin. ,\n), clectronic sign;\I\lre shall be replneed with an original signature as promptly ns practical. 21. AClioll by PI!,[li.£ipant s. All action rcf~lTCd to hcrcin by Pill1icipants sholl be tnken by majority vote, with each Participant having one (I) vote. 22. Conscllls of tlnd Other Act ions h\' Che"ron. Pursuunt to Section 2(d) of the Chcvron/Pl.lC Agreement, Chevron hereby appro"es the fnct of the ~ontriblltion to the cost oft llc Road by each Participant (olhcr than PDC). Pursuunt to Scctions 2(f) ami (h) of the Chevron/Pile Acrecmcllt, Chevron hereby grants each Purticipilllt (and to ench Pnl1icipant's agents, contractors, sub,ol1l ruc tors, subsidiaries and other uf1ilintes) n scpuratc, I1Dnc)(clusi"c right nnu license to use the Roud in accordance with the terms hereof for so l()flg as eltch slIcil l'al1icipant continues to pay its proponionnte sharc or the annual maintennnce costs of the Ro;\u nnd, to the extent Piceance Gas Resources, LLC (tl:c prcdccc5sor-in-int crcst to !Jeny, I'G R 5 '. , Partners and Tcton Piceance) had the right to use the road under PDe's Iicensc, consents to the transfer of such use right to Berry, j'GR Partners and Teton Piceance, and thcir respective agents, contractors, subcontractors, subsidiaries nnd other aftiliates. Chevron hereby consellts to the transfer by PDC to Operator of the right nnd obligation to conslmcl and main!.1in the Road. Chevron hereby waives the requirement set tortl! in Seetiotl 2(h) of the Chevron/PDC Agreement thut PDC shall have completed all agreements with additional contributor.; and conIDlcnccd aetual construction oftlle Road prior to \-Iay 31,2005, and hereby confinns and ngrees thatl'DC shall be deemed to have complied with such requirement. 23. PerfOnllanCC of ChevronlPDC Agreentenl. PDC hereoy represcnl~ and warrants to each other Participant that, except as set forth in Section 22 of this Agreemcnt, it is and has been in full compliance with every tern! and conditioll of the Chevron/PDC Agreemcnt, and covenants to notify each other Participant in writing promptly upon bccoming aware of uny breach, or threatened or claimed breach, by PDC or any other party to the Chc\'ronJPDC Agreement OPERATOR: GAWEN GULCH, LLC by 1'~6ft. 1m~n~~I.QIi!lioll, Member Manager By: ~ Name: Eri£.iLS,...,tc"'n"'m"'s'-___ _ Title: Executive Vice President Date: ,) v"," -e 7, 7 00'1 I STATE OF WEST VIRGI~IA COliSTY OF klQ!tMMi\.J ) ) ) 11,. (or.going i"'([\lment was acknowledged berolc m. thi' ~{b.~ d.y of {L, 'u... _. 2007, b)' ErlcJLSl£il1llL-.,.' .. ~!j~;JWjctl:JjL "fPolloku", Development Corpo"'ti~d" Co!]x>r.linn. Oll behalf of ,uch camp'ny. \vitne" my hand and ot11d.i seal. My Commission Expires:l!/J.J 11_d!d!?,,-~~:!:' Public: ~fZM'~~hJi; __ _ "'I) NOoTmMcYwP'lUUBJ By: --.J.~::=S:~~~~---Name: T it!e: __ -,-",-,' ..... '--';-'--"-':=""'--'-=''''I Date: ___-'g,,~/;.u;:.z .t.:" _J.o... .J. II,,'__ ____ STA TE OF COLORADO ) ) COL1HYOF _~ ) Th. rortgo~' instrument 'lOS acknowledged before mo thi' Z.,:tS;i;y of ~,.J: , 2006, by .J"«, .. nil....'? 6-. ... ilS J[~,:.k~.-bf'\oad!,..or Petrol,lUu DO\'c1opmenl Co:porolion, a ~_e_\J'-<!:! ("otp-otatiOD. on beha of such cOlnpany. Wiln,,, my hLlld alld official 5e.ol. BERRY PETROLEU~! COMPA:--JY By: ------Name: ____________ _ Titlc:, ___ _ Datc: __ STA IE OF COLORADO ) ) COUNTY OF ) The foregoing i:Jstrumcollt \\a) nCkl\O\\Jedgcd before me this ____ ~ d"y of ____ ~~ _ . 2006, by ----,----:c-:--:--:-' a.'i ._"'"_____ _ ____ of BelT)' Pr:trnlc1!tH Co:npJny, 1'1. ___ _ eO'1Xlrnlion, un behalf of "Jch compar.y, Witness Ill>' b3nd and officilll seal. My COIl\!Jill,'on Expires: __ _ NOl'I)' Publio: ____ _ Xame: -------------------\ml] 7 ~~'e!tr.~~~N~HIr'··;',~oilllll'lll""t)~r~",~I~ 11111 i"U5i~Z~!o a~~!~ 1~~ts,BOo!~:!/0, g~7wntJJ~!~j~? co PARTICIPANTS: PETROLEU~ DEVELOI'~!ENT CORl'ORATlON By: _____ ~ ______ _ Name: Title: Datc: ____________ _ STArE OF COLOlV\DO ) ) COU);TYOF ) "Tho rore~olng iruuwneul was at!mowlC<lged before me till, __ d.y of . , 2006, by __ -._-,-.-:-:-:-' n, . _ of Petrol,um Development Corportlion, " ~~ OO'1'O[;\lioo, eu beh.lf of ,u,h com plOy. Witness my hand and offidal se.l1. ~I>' ConllOi,,;on E'pires:. __________ . Xol.,)' Public: _______ _ Nam.: ( le,ll l3ERRY PETROLEUM CO\II'ANY By: _f1;:(&.~J1dfo_ tJvJ Name: _ Bruce S. )(01$0_ , _ Title: Vice President -Exploratio" Date: ___ ""guot 25. 2~ ______ _ STATE OF COLOlV\DO CITY AliD COlJ)JTY OF Detlver._ . Tht ,foregoing inslrumeIlt \\:M ackllO\,,-ldged before me this ~!=J~ dJy of Augunt . 2006, by illucc S, .t'.=lclO ." Vi,:~ rrc.1dent ,~. RXpl_'WDenyPclrole"",Co:"PlU)',. Dcla":,r~ cOllloratiOl1, 00 b'half of ,uch complny. STA TIl OF COLORADO COW~lY OF :.\2.8,!\Ji'&. ) ) ) "\()\\',l fure Oll'S imtTlnne!ltlwas .<knowledged l>efore mo tllis ~ day 0b~~'\ll6O\ , 2006, by .J . .., ._ ... H 1r,Jp,b$ ofPGR Partners, LtC. a of-All:;L<orporation. on beh31f 0 ,ueh <ompm)". Witoe" my baud .nd ot1idal seal. ~ly Commission Exp;rel: LJ -1-O1»C) [--;~~.~~~~J NOTARY PUBUC ...-STATEOFCOLO~ MvCommin~on E~ires 04:0712009 TETON PICEANCE LLC By: ________ .. _. ____ _ Name: _________ _ Titlc: __ _ Dntc: ___ _ STATE OF COLORADO COlNTY OF 'l1te toregoing instrum~nt w.u :!cknowledged before m~ thi .. __ chy of _______ -' 2006, hy _ . as of Teton Picetl1~cc, Ll.C, a __ ... cOll-lOradon, on behalf of iuch compJ.ny. Witnes'S my hand ~l1d officin! seal. My Commi"jon Expi,c,, ___ . _ ...... ___ . >lot.1)' I'ubli<: _ ..... __ ... .. . Name: __ _ [scll] 8 , 1111 ~\l\f1v.l\",I~ :lltT'l ~.,~'II!,I~~II\~~I'~IW,~'J .1111 R.c.ptJona: 720196 MI2$J~1 131'15;" P" B: '9" p. G175 JUI'\ o,lba,!eo '0 Q~ 3& ~.~ F •• ~s,a, .tD ~ f •• O.~ a~lELD e~TY CO PGR PARTNERS, LLC By: NalJ:c: Title: _____________ _ Date: _________ _ S T A IE OF COLORADO ) ) COli}iTY 01' ) 'It,c fo«going i"':l\lm'~t Wd< ocl:.nowlcdged befo,. mo thi' __ day of ____ , 2006, by --;:-;--::: ,AI ofPGR raMcr1, LLC,' 'o'1'<',"lioo, 00 beh.lfohuch ,o:.npar.y. My Commi!lsioo Expirtl: NOHtry Publk: ___ _ I'llltl': __ _ TETON PICEANCE LLC By: ~__. ~ ~ Name: . ":"_ .. !lrle tt.. . __ _ Title: _ Lr.'iJ5i~/1.t Date: _r-k~ __ .------STATE OF COLORADO COL'STY OF .k_~"'_\L.. ) ) ) ------------TI:o foregoing c,ltrullltnl was acknowledsed before lIle thi. c1."L doy of ~II.!>.\:_., 200G, by ~L~\"''''b ___ .I\S_y..iS.::.'\~.1d:>i ___ ._ of Teton PiceMc., LLC, •. C.C\!U.~n __ ""''lltlt'tlIHlH, on beh,lfofsuch comp.ny. \'.""'.~~ \'oGlo',\'v.., I.l>"",,",! ... ~ 8 STATE OF ...:&.~ COUNTY OF JiarllL..-) ) ) Th. (""going in;tIUm,nt Wa! .cknowledged before me this AI ~ dB)' of ,S,:.o\?mn,G' 2006, by \\,.tiLTo..-\tV ?.)' tL-. as ilHocae¢ -ta· Filrt_ of Marathon Oil Company, a _1?:~~ corporation, on bd~3]f of such compar.),. Witlle'SIllY hand and emd.1 Sell. M)' Com;l\iuion Expire;: ~a"V(lr~~1~Q D. IaIHIMAIf 'Jot.ry~c. S'II10of r.,U My CorrmI",,,,, Exp'" )Ilnuory 17.2010 WlI.LlA:-'lS PRODUCTION RIIH CO~IP J\.."JY Il~': __ ~~ _ ~~-Krune: Title: ---.~-Date: _____ _ S rATE OF COLOltAI)() ) ) mUSTY OF ) Tho fo:egobg i:l'trJm,m \Va; acknowledged !>eroro mc this ~._ dl)' of • 2006. by • • >:i ____ ~~. • of Willinmll'roduction IL\IT Compall),. a __ _ corporatio:l. on bchllf of such compar.;y. ~ly Commission Expire~:_ Notary Public: _____ . ______ . __ .. Name: 9 l'v1ARA mON OIL COMPANY By: . _____ . ____ _ Name; Tille: Date: _________ .. __ _ STATEOF __ _ COUNTY OF ___ _ ) ) ) The fore&oing instrument was acknowledged befD'c me this •. __ day of __ .. _' 2005, hI' _-:-_-'-.' __ '1lS of ~1arathon Oil Comp.ny, " ____ _ corporation, on behalf of '"ell compan)'. Witness my h",ld and o:lid.1 ",I, ~1)' Commillion Explrc,, __ _ ~olary l'ublic: ____ _ ___ ._ Name: ________ _ ('.JII WILLlA.,\lS PRODVCTIOl\ RMT COMPANY BY:d~ ~,:_,_-__ _ Nwnc: A lnn Horrinon Titlc:~~C]lt DlItC:3~"?L __ . ___ _ STA TE OF COLORADO COUNTY Or DENVER The [Dl"going instnuncnt \Va! acknowkdged befo,. me this ..5!J!. d.y of ~~-p.~embeJ:., 20C'6, b)' Alan Hurri"on ,115 Vice.!re. ident of Will i,m, Production R.\\T Compan)', ".Jl.iliJ.'l\rc eorpOI.tion, on behalf of .uch co:r,pih1y. Witr.c:ss my htmd and oOicial ~eal. 9 For pUQloses ofScctioD 22 hcrcQ(QIl)\,: CHEVRON SHALE 01L COMPA,'lY, a division of CHEVRON U.S.A. [).lC. By: __ _ Name: ___ _ Tit!c: Date: _________ _ STATEOF __ _ COUNTYOF __ .. _. ) ) ) · ) The foregoing 'mtrumenl was ackllOwlc~&ed before Ille thi, __ d3)' of ______ , 2006, by _ ,'" o[ChenOll Sh,lo Oil COUljlMlY, a __ _ CO:-porl!:Ot!, on beh,lf of luch compw)'. Witr.cn my hand an~ official seal. :.otruy Public: __ Name: 10 EXHIBIT "An To Rond Conslnlction nnd Maintenance Agrccment DescriptiQIl of Rond Operator shall construct, operate nod maintain the Road on the following hUlds loealed ill Garfield County, Colorado: Township 6 South, Range 97 Wesl, 6'h ]',1\1. Section 12: SESE Section 13: NENE Township 6 Soulh, Range 96 West, 6'b r.:\I. Section 7: 82S2 Section 18: N2 II ExmmT "B" Descriptio)) or Lnnds Garden Gulch Road will provide Participants with access to well, gas pipeline and gathering systcm, water pipeline, tanks, compresson and other similar oil aud gas exploration, production. gathering and transportation facilities located on the following lands: Townshill.j Soutlt, Hllngcs 95-98 WesC, 6th P.l\!. Township 5 South, Ranges 95-98 West, 6th 1'.:'11. Township 6 SOlllh, Runges 95-98 West, 6th 1'."'1. Township 7 South, Ranges 96-97 West, 6th P.M. 12 ( ( " a.«1'~T,ut'~~Q.aC'~~", HW'th,4wriu ~k .. " l111 \ J. ~~C$I., ''-"t:lt. tx not') r.n BOI)4lro:ti, KlUoOf\. rx 1JU1 :rcttolcu:n Oe,'tl~t ~tKr.: Atr.ntioo: Ot'lloocyOeOOt.l 3801 CI.TI«I A.""!,,oc ~VI!f.t,CO~ crs-OC to roc Lena COCl,uf to An1ru lid knM<!nlentof !Aut. G1t1!tn eDIct. R~ .. .t At1t.f/'llt.llt G,rltdd ec.wnf)', CelQrado InIt~;1. EXHIBIT "e" ChevronTexaco Pet ~ let1cr dated No-.'tr..~:t' I S,1004, utll"C'/M .~ our mcoott." ..... -w:a OrnJ IhMw;n and}!rio StWl.lA In 00'11'1 otr~ on N:Wro~f ]7, :lOc)4, l'etro:t'1!tl I>eYl:OP"CfJ Co:p~_n.~:) ([lOC) bll ~I"j C!>o\=T ... :o S!ltl. on CQ".Jp.y., divili", o(a.,r,oo US.A. to:. (CTSO<:). wtJclllJ ur.(:cu.or in !!l:uln \0 Che~TOn S\a.I:. OJ Qxn~)'. QC:It11o::l:1 \.0 POC', u.llt.J~ to pr~u.1KO Gu Rt.JOOf:~ u.c (f>rQR) c( L,\ &;lp:"o.xJ!1'.llo 50% !t.Mrnt b t."TSOC·.I~ns II) PDC 10 alto1:l~ C<itJnty, Co-Sortd, (dtfr..""tod I):J F~ilh:t "Ai u urn:. OO\'tf tllc ~i1 \c.p. PDe hu fJ.1.~ItQ.ur.r.od tl>"" "Itt:!. 16. orc~ -=(!fo.:) I'.xhlHt UA'I Itlm ~ Itt:dC'J to c.\t:nJ (}.e .... t~lIM faciHtlt" fC'Io,:;ltt~ d:a~ (fcte.:dOl'l dtm) put ~ c:urrf4".t data cf l .. ~ery 1, 201 tI. r." IC'Jo.:ati::lCll1ito It lh:I &.ttlt v.+.1t!:! l'-.: '~.f.t·n1ty {cr,"pt)inS1hc t<lltl e.wcitJ.cd ""'~ m:tY".tIl aht.-In& ",~l. m.i fa.-'lUtiu s:) tht1 crscC:rA), ptJ:tLI: dub ~Iio~ L\,in" ~ CI'SOCbl"OC, crsoc:s. wiUbg II) e:~n.l to 1M req.m",e.J nd;p::::r-'\t oCiofc:rw h i'Git (u~~J h:rct:l II !IIll::bt1 "'i)"j).,1d w Rltur-JIA, AJt!;I. 16, of~~h o(tb., P.:.bt'Nl·A" 1:1.$';' U J.'('O\U:o:l [11 rlJ1taph .4l-eto·!¥ (CI(cao~ u~d n,r)' .. 'ell ~CoJ ~ Slid rtue.J.t\e: 1M Ntc o(th, A1::.r:rl~e.. .. t(L't.:}t<1 htttl) &I l:::IJ.iblt -C"" ifP1>C I;:'OCJ" tho fhU:m'bc: 1, 70C Matt U:ee',\h ~= Ce.-u:.\[ to Aulpl :~tt!l' t,tt:erb¢ot (aJ.!ac!wo't nm:o tJ w.~lt -n"l tf.~ chdl.a \:1.0 obttJ:\ fOR'. ' .. oel.l:io:l4'l[ uid thlo.itllt "I)", EkJ<b. euea\td oop:c, of IIW E.t.!Llbll tJ .. \J thm bo rth:mtd Co (''TSOCj c:a..'y U;aot1 C;SOC'. rr.a:lpt .:.hxll co;fct o( Fr.ibll "0" excwt.,J frJ POC Md P'OR l~all CTSOC'I (.('lQse!l!. tort.., lul&n:;"\~1 ,e(~ h:rcb. ~ e:t"r-tt:n. 2. FDC !ob~1I {I1o:.url \ti',h ftc: CQ::J.!;"U;~-icn of 1"1: Gud~ Cu~:.i R03l.I (GOIt) p:: th: '.I:r.m e{ It.iI)~tl"J.."w..cl. 13 ! ( ;~my)7.~'S 7 .. to l ChevronTexaco II. il.e l'O~t" oCJ,id OOR '~.l!t b: tb: t;1~\~ t:r..iC eo tt:..e Itt:clAl ::lIp (""/11""""'0 u Exhilh ''ll"), nid "'''I' bd,,& d.u,H.uy 1:1. )~l3 ",l 1.1.\i'l bec., d:a"i!n b)' Co.15tvetk:o Survc)'I. mo., or In 'l"..crmI!'\'C rou:e, i¥.Of U:t OOO'1.ffi,."'f';(.t'DC:bt o!:o."~do:Ij l"'oo &."td crsoc .haU Ilttn'9C =0 ruch ,tr:~r..e.,t O~ :t~ fl=tal 10:.110 t:.rc the G~ if Ptc .. oo crsoc ~ not l,;eo: Q.') a n..,.,1 :t':.1c: :01\.~ OOR by M.a.rc..'t I, 100$, crsoc akr.!:llboBli oh«-,t Ik$ t~~, ?OC .blll Ittll p.-ojt« ::tliU111(': roc~" OOR btt.tdt". rrtJeer. " 0" or ~"'b(. M"'" I, )~)l roc '.'iII.,bml<lo crSOC. sm f.lthuli""'oOf t},,: OO;l oreroS*.rI.l:ti:.l crt~ OOR.. $lid c:stln::l';C 1.~1 x t':-cr.:I n !nd~per.deo~ QW P&rty w~~ I_ln;h, ro."dot.1J,tIO':l bLlAi.:'Je-D '7ruh C~:l:e to m.a\:i!lj Ixn road c:f'.b:\UtL IfuJJ. C,!I.r.u.~ ueuds Four M11lion }t"ire.lhzndtcd. Thr.Jh:',~ DoIl.n(io<~OO,~)O), Pi)(! wll he", tbe o.~olco ofp",,~oS"":" Ib, oon COI'UtrmU:-t'J,\Y.-anIl11M a.Ml:Jon.1 CoOle ab(;l'O u,$~,m ~:/. 0: It mil)' d~!h1.c 10 proo:..e~ ..... hb the OOaQOn5'o!'uWCl'I b-jpay;.n, crsoc Or.o Mil~oo Do~." (SI,~).(OO), Thl. "')'Mm' '0 =""'" be ",,& ... ),ta' 1!», ~!It;'t.,~ 1,10)5. rfthil: r"),TnetJt 1& ~ac:!c tl) crsoc DO Illt'J 6L,,\ v.&'''f;t\}, ms, ;DC .!u.!1 be ~er M fU:1.!):robHptl¢r\ I~ crsoc -r.uec ·.itl."·'"n'.:."I~. ltf:ov..'tl"eJ',l>OC e\:.C:!1 to pt'~ (~'tttJ, tbt.n l'De "~,1J eorn.J:'IDO f:xv.w LVJdc.r:.~ tcnnJ ~f'2c. xb~y. 0, poe ~ujl &1..xr.i~i£1heO<IR 1)Ql1~~tion req,dlt'l by~tot',woval ltonlln1.~tt\C)'. OltUJ!ZolCloo,~, S:)VMlm.:n!al M:n.~tueo C'rtlth:rt:Uty ~....mlj'..TiJ<lk:rto:\ o'r'tr~' OO~.:l. rr anypc.-nic 0( "~"n'lJ It rcqvl~. tOC may ~rb)' It., r ... rtar~'tru:4te.n ur.tll um: II a:«(JI.red. Howc"m',lfll!rl po;r.:llu t(" 'Wt0\~lt Iro n¢l1:q~.rN by PDC If A ",;nrlNetiu.1. m l.\!o om ,a.::ed ~ M.ly 31,1005, roc ,-\all ~.il ip.to&., ~p;:row K"OCU!II1..\: N~ of One Mi!.tto:\ lx.ttm ($ I,(XlJ/JOO) ptJ:lIJltlt to th, ten:.; c~ 1.., ex.""OW tvremcnt e;roc-.. blc»!xxh ptJdcJ. A1t~ Pi.kb~ u)d c!~lit PDCtn:I)' ~e.1~ to p~ y,it~ the p!mictna a;OO OO;-.l~.:,(Itfon oft}H' Goa l'\( it r:ny ~od ",i.1h IL":'J!:. If It!See: pnxcc.d w!!h h.ClO trxf Ct':t:rlFl:1I:I~.e:?Cmitrln..l ud.~:tr.an:w _","""",o(tMOOl\ byD:<mI>" 31. ~~:l, PDC u.U b, .tritlod to. nfu.'1d o!!!., etel'O'o'f tIWO'.¥1t. O'..hen:.~,o 1M Cj!:;'QlV reooor.t!ur.6 will be, ~ict"Ulud fa CllO\TtIll. r!. c:rsoc ,,\1..:1 CQ.;V.t~·.1:I lil ,urftce fcc !Qrn'~o¢f· ....... )' r~ lh~ :or..d.oJ .nOO,I)~ b L':e bCd -.ctwJ toO'. i1J: Mdint t114 oaR. l'DC .h3'J rund U\ol 1t!I".l..!o.dtr of the tOIt bdrv. b)' ~I:~.,ad~~ cO!':lplntu 0: r~~1J I. CI."41t:ibc';J::n, ,p;':-O~"IL1 cC",hlc.h m:.at ~ requtu.ed by PDC tnd ob'.t.:n:.d fro.:n CTSOCpO:lr to th~fbeln3 ~~~ to t«.Itrll,4l.o Igwwdlhc toO,t Drtborl'll~. CT5Q('~mlywitht.Qtdlp?:O''at oic),wdl ~h-e tootnb~tar ((If t:".y .~.ul)n ct 1'.0 ftI:l~'. PDC.~:oJ indu.:!o-17:)':;1rty n 1 Oc~~ib:.ot.or 10 ~ (KLl. 1'ht CT.iOC wilbt~ 10 hlvo inch.-ded, «:Ud p&rt)'CI) be:r:itl£ ~"'I!ir ?-"C?O--t~m.to UAroo( Ill: c.oin to b-.. iH 800 Int!r.U:n t':l: GOtt ~ 0'!1 tl~r 14 ( { !1~\'.'UY )1, 20'S 1'.tO l ChevronTexaco &'l.tl;:pued 1.1"',' of the OOR eadcn t::Tm airnllu ~ odlOCthi:-d p!ltCies ~ h,\'CI beu ,,1l:l'.rre1 "jcb b the ;Jitdl... . 1 Cl(l... . ~aoR., {fL"IYh.a.ve ~en 1(1 .:I.w>l. I!~ ,< .. I ,..,,, NUl \be GOR ,,,,,d. s~.cm,~)O, ~n CTSOC .un bm.u. i!1 r.lQr"ICtuy O¢;:l.ttlb<.:"Joa (Of 8l:nc b)' $$0,») fo: n:.~ SiOO,(lOO :::rl.r.<:;-~ue.dc~~,ull~. l:",utm'.m tco".Jl n»Mft':)'~u1l7.1tio:'lb)' crsoc or 5500,t<Oo:t e. I!.nec SIL,-s;t ec:'l'~Joe\.!OlI d '~.II OQR, PDC or PDC .. rA 1tt ~::t:ibu:or1. hi, lpct $4,$00,-003 'ltr"i6:>:';'l co:r.ph:t!:.1 ':!l.c OGn. I, 1":'..11 d''::'J!~ t3110p ~tTJ¢ID:I arA.b&r.&a tho ;-cojcQ~ 'l'ti'mJt ~paWi"" cu:c:p' L"IIt it ",,:1 :)0( 1~,\"3 Ul"y Wlew.u or ~roo:Jf oon.:l-:tio:1 ~I:td by l~eI GGR oo:',r~c.o. bJt wi:1 It ttl O'~ tolt m.I\:.o 1:.L"1l!h! er:tl:c OCI':llt"lx-!.~ (!,Ct, 11 ufo :nr~c t':wJdon~:. th' V1'~.lee-:.. r. Th.GOR NlI!>o ov.nol!»· CTSOC,',u CTSO~ ''''11 pont I'DC. J<"m" '.1ft J.Rm~. POC 't.t1 ~ :-e.tpe~wlo. tt ill JOb oo" .. -,J ~, ftr :T.lln1rm,n;., ofClol GaR. and dull ".:rlocm u::ne on L, ,t::lI.:tI bitt. h ccltt U tC''.I.!:l its l)ceruo ~01J" t!;e GOR. i'OC ,bill no( w .. Me \.) ~(<<i~ ~ic.e:u~ to '11~ Lh: GOR ncr III d1.i,:)' to uuJnain the aGR. w:tilOl.1 crSOCl1 F~ wrtltM 00f,~!.. wl:k~ ~s.ent r.'IC)' be ~~ji by crsoc fot en), ~l$CQ co:..o r~4.'o.: .. I"zty 1Y,Xt put)''Wh~~ hu O)[\t:Ut..:1.cJ tJ m. b'..I.i!odb, celM OOR fV."'fJl..e.t to t~e ';er.N. of~. ILT«n".«".1 JhtH b: EW'I1Cd. u~" '10 '1U= u!iS rold (0: IIl~t II loll:)' pty a ~on:t.o "ere o£the to:\tIJtuf:l& tr~"l.u.l rxIr.tr.::.I:lCO rol~'. uld mtro to t» detcrr:lbcd by a W1';~cn It:"ttDenl bJO';n ira :h~ 'b.lll::H"i \lrlle OOR ue.xtc;!l;'I ,lid ron~~, by Crsocand by POC, " crsoc l~~ll ru: to ot,:i't=.!~ to PI)' t."1'1 nu.!n~O\!noo (:-?1o:1 an the OOR. u.·Jell ,nd udJl itbe£i.os I.l&i::. ~id tI)I~ 'kI.~t.:.al1)'u.m. Ja mL'Kn.!' or dtm it. oh'netl and/or ';11 \!lOCUS or beti:n g,~i lln1e t:l O'l\1C,'whc ietl\'tly utuet 11:1 mbe..,II. M u.u ti=1 crsoc .!a'J -yay iu ~t!onlle .bare afth3 m&u,ter-.!mo coo!ol., rocth~ GaR ~,,~ 00 itt petml~jl.~ UI' otlllU rwd \"f1JJI t.,\: Clt\!C 01:::.1 1\l!!mJf, ~. Nl)parl), rr.a)' usl~ 1:'1'1 ~)rf}.)t\ ot lu tf;.t."UO to t,:J; l~ OOR \\olthcutthe pd« 'll.n:en oo,,:nl of crsoc. · .. hl:b eo:.K'n\ tnl)' b, .. itl;.hd.J 'e« lny ~uan. or M rUlOn. <.."fOOC lorob)' ltto:$6~t POR mit r,:." ~h:. OOR tIT.I~tf POC', 11:4x.t': NR.1, rltbt to L"U ~.t oaR. WJd8t PDC" lI;:':r..M &NJl n«b02 t:.t.,.'U~1o1."l.b:o witl.o...:.t crsOC'1 prl)l' "'fltl~ oon~t, 'Ahl.;h OOOIO:C:\ my N wilhhe!d ~'Y CTSOC fbI My tutxa U M nl)¢n. 1,..'PUadLl o( t,\s OOR. ,,. .. U !>3IDroJ to ~y osee,,~ PDC. fl' ~M p'-"" Ib.!.ll be oJJowtd 10 "" "" GGi\ ~;Ih>-,' p.)~. reo to bed,\enr.bod by POC.,..d CTWG(lf?DC ,rrlGfllOC." U11b1C t:> tC"Cc n!o II. reel crsoc L\~l1 K( t."u, fr::), All fetl IfCei"Oo:i!:t-m tErti p,~,:t~c.I. e.J;".~it1, IT..w.tU11liee (ees.tnd (tel paid II:J ~Jirul coo!ribu~cn 1.I.~o!'.:.the !t:1l'.1 o!l~i.l:~r.t n~rn'>U' 2 J~All ~ civtled cnn!y'bo:;W«ll ~DC t.,J 15 I I ( I ~III Wl.f:~I~""~:ll'IiIU~lalll!,I~~rtt"lft~I'V,~·~ 11111 R.ceptio~#: 720195 hn:.)lf'II7, ;OCS f'1!I/~/1OO7 01, 18:41 ~P1 i: H~41 p~ OUt5 : • .,.. &llb.d~ rl!t::l.c 19 or 1& ~.o F •• :$"" ,I)a Co.:! .r .. :O.M ::R:n-lE:'.o COJ\t'r CG ChevronTexaco CTSCC. S'Jl}~ t) the Nhe: p:c~oa. ofthiJ Uet:l.lT.:rnb:c Z. PDe m..at :!o..l\'O til ~>!'dtrrM"Y Stu:Kt II,J ...' ":/~NmUY qr;cmen~ b::w~ QddJti~ 00CItr.~10!'1 ~ktcd L-,d ntt .."." tUi.I ~rRcdMt.::Il r.b1o<F.t ('I' laiC" tb!l.1 MIY J 1, 20jS mi pr'OC"e:J i.iilll~'!l:t w{:h tnt 'M;\.-k tntit ooav'eicd. j. PDC :T~y." I:. ,,)0 t~,,«lon. r.. ... 1 Lim:~ Utbllityaxrcw.y (llC) for the ;:\li?O" of «:C1tt\le1tO!'l or t!l.e (".rem" coll:edct:'l tnJ dfrnlormt:ll or fJrdl (Or th.$ ~.stNCIj.)~ OflM oem 11\1 o.t~ cd.-dl'.lis':l.lKIn, ,~ifj:t\ .n4 tOCO'Jn1lr., (0: th-: projr~ .. , r..c:aUJy. 1m pntielf. hc.o.el.) wtl..t'~t i.'\ COod filth ~resc1'rC lilY d.h~ .ru.b~ oo~orO( Ctlatlr.1 jo Lh':" Len:: Atrecm:nt ~:Yby :'n'"..diJtiOCl w:rth= Ce."dQ-{Q{ Pvb~:. Rt$:-II~' ~ii"lIUl Pr-o:.e.i.nlkn t'tn'er.llt fn~!fl:et l-rf«fl luortm" ~ liti',ulca. ~. Art!ch S of'e~th Ju,n l!,Wj 0:1 F..lJlr"il"A'· '~:lllt M 8nCI'Jd:d to bd',m:r~ {,))lt1\o!r.t (ar.&.:a,e at ~~ Wt!n."i"-S of w'i a:ti,l~ "l;nec &£C:el d,,1 en t"l.fil;.e 1t:1~ "",ned by tenor I. 'I;1J net t(lffl:t~~ 'riY It:rfwlI ao:i\'/tl:. \vhlctl n.te .UIn\-'N UQ6cr\hu .gc.em~t wj~ fJ.:'tt s,ivL"I8 Leno: ,ad Leuor', 'u=~oo l;';1(e tMlty(30) t .. Y' rdt>: .... 11!1t.,., D)".ic<: or,,),l ~viti«. A~itiO(l.LJr, prk.c:O OOt':l."ne~:ln& ny ru:(ko: a~thity{c(~ tlw\ I\lV:)10t) Drl t.e.tJor', surl'1~ !.L....:5t. Len:o wi:! tr.ter l!l~" wrl:.tcn ,u:(.ee ckt:A~ 1:t1bt.~I'C:U:flert .,..;Ib Ua'~1 }.u:fa:'l5lt.uto CO\,mr .. tM: Ja:vJ, to M d~,L"d. will p:ondo' CCp7ofAl:'X tokuor. In 1M c:\'t.::t thn Loner'. :nuf~Lc.nu rtiolLllrt:S .llfna~ Jt.tt:e~ that ILSJOC W flOC deem u:tf':uotltbl~, t1e:1 I.b.Jer ·,,·m W.1j\'CI tho rcqllirrm:.nf thr I. mntM il!1II1'l5I1I1:tr.mroI." 4. ArtJ:.!o J G Clf u:..'J J!olIIC J~~af (Y.) £Utlbi,otA-"til:1 bo 4.-n~~ t~ ltpz.."1;'C fto lut u:\IMt' ofn!d Artch:6 \\~:th l.~ toll7w:tli 1L'l!;UL~ ·'tlftuh-, Ir.l:uuy 1, ,J)l S ifl...cIlO{ re.qC:m: LeI"frO 10 cltc.l:r. e~" ot ",(:X:lt:> utj or wno" f~litJ:,. ~hoClcl\b Or'3raea..~:ho 11):( ?rod~Q.1 ~!hJm",\.tU ~= ~ u r~joYl'J: Yttr :tCllt: J.r.u:x 17(17:!:.I.l:i~CVl ,~" Yttr ;019i Lel.~ 16.'17:1:J, L;s.W''O 1I17~1 Yrlt :2020: l..eJ.J';IIISI17'"Jo.t, ~7Jl1'u Ytlr 2021: l.eu:'C' ~4/11:~"1 l...a:c« 1I11w yt)r~n! Leu-x 1;1117'1. •• ~ .(/17Cu Yu.,:2~B\.!.I:-uo(' IVt7~.J,Lw..co5l17t!.lJ Y~t; 2,)2': u.u« t 1/11[~ .. , Lc-U(;o rJ17th1 Yc:.tr 2o).,S: Letsot 1 0I17~!lJ, Le!l::r.e 7J J 7lh, Yelr20L.6: r.CS1OC ?/17ths, I~lle! 8117t .... \.~ 2011:. LCIJOr 61J1ths. Ltn te 9'. 'i't.t." Yenr lOll: Leuor 7111lh.t. Lef~c 10{11th, Yfu201~!..«s0C' Gil ?du. Leo::, I1JI1th, Year 2030: Lm« Sl171hr. Lc.w.;~ 1 VI 7thl \'euZOll: LcD<Y.-4I17tN. Leuro 13111th. Year 2011~ ul!O:' lIl'i1fv. Le",,~o 14l1i::u Year lOll: lnm, 7J17lht, 1.<= lSI11l\. Year 20!4: !..euo.r 1I17d,. une, [(11m.) Yen 203S: Lci;lOTOI17t\. Ltu• "• e Ii ll 7cha 16 '. ( ( Jbr.:JUY 17, 21)J5 PI,eS ChevronTexaco E...rt"tive ',.,..:uy 1.1C)S ~ ~«l!'kr, lCfl":ot 'tr:e' t<) r;,.\l:l.e. :«~ C( rdoCl~ itl Ci>"~ tl its ~~ ride: &~ ~JI, in (\-d:( til e:{r.U:~~ U1 m1tttutnee o.-d Let.~ 'Ntl ~<lnlYJ o~li..~ion \) oo~r.nlO: Leu» tr'll ku1 rr~()4 rt$ultin. ~to:n slXhetrrJt".ltiro cfatl Intc*cr.e'O." Irf!"OC IIfCCi M!lI!he .bJl't, pl!'.1.!a 1l:Jo inekll.t: b-t utt>l.!L!n, £n tho lp.tee rorov'tdeJ b:1r;I'''' a...u "p,m:Il, a lUll)" cx.ccllUd COP)' of thl,1:ttt: lO my ukI'.tlCj, at U>:I .boWl; l&rdl. "Th!J 1p;r«~tIt 1~. ... 11 t-: drt~:!,,,,,, oftt"dA\~ l"".>C agrees 1. ... lX! ~te?t.t ihl •• lt~t. JI)9U h:.YI ~..l~,t3c:u rtE'diPI this UTttm:nf, plu.u dhd then ~ t~o I'&th-c .t '21 t.j 61~7H. Slnoe.'"tly, QEVRONTI!XAro SIIALU OIL CO;!P,,"'<'Y, • dl"Jl1zn of C.~TOrl U.s.A. ~. ACIlY.F.n TOA."1> ACCEl'lYD thh '21 s+ dlY of "J'dr.u..", .... kJ_!OH. P!11'RCllUM OF:V£l.l)PllJitrr POMTtON ny: ~V--U).e; R, S\CIrI:':'l' El.b:u'.f'o'C \'? F..'I;plD:'ILiotl r.ld l)e\'tlc~'1)or.C 17 ,,,,' ,~f1"ila.''''~:~,MlI:\lIll,llIlt~r.lrMV " J I1111 ?,tJon.: 726196 Go,2 1100101! IS:., ~ B: 1941 P: Dlel J .. n l=I:b.r!c~ 21 of 36 R.= r •• ;"81.00 f)QQ " .. ;0.00 C.AAFIELD cw-.: '1 CO r d i:! ,§ i< " l•< ~ S ~ ~ ~ ,. I ~~ !.: a: l r (f ~ 8: ~ ~ a ,< ~. ..: ~ ..: ..: ~a 0 ~ :; :$ ~ ;! ~ I 1\ Ej i1 ~ Il :1'1 1I t! t! i c i § i 1 i i I i j i J ~ u Ii il i 1l 1i 11 I I "v I ! i ~ g "~ l ~, f f ,I; I~ d~"' I K~ .~. ~~ ~~ .~J. I i.. ~~ • ..:3 ;:: IS 5} r. r.I of ~I ~J ~I ~ I: fi .0 ;3 , ~ ~ d 8h i;' 16 13 ~6 h 10 1° ~B 16 ~! . ~ .~ .~ ~a s ~~~ {~' J I, j{~ ;[~ ~~ H ~~ ~ & H U a! !!G d ~ !! 0 .J.i; ~~ ~6 " ,,6 "0 "s "9 rQ J H II gi 3 ( !l Il ~il ~~ B H Ii g H ;~ § li " ull Oli Oll " " .~. ~ I I~I ~.f~< ~ ~~ §~ ~ I ~ ~s ~;:; n 0 ... r r --~ 5 g ~ 0. ~8 ~ ~ ~ ., ... '" ~ ~ !I z~ ~ ~ ~ B ~ ~ ~ r :l :l r r il ~ r " " .. " ( 18 ( ( ExJ,(1)lt C To l'u.n~It" pd"Stlt "'tm~JOt n .Icd !ff"~ .. :;'orttnS" M ~Dy "dB.", «. 7unkpm n~\'dO?Mt1ItCerpo/nle:d1 ... StUer, I~d Nttu.~.G'_.ltqQuf(UI Ltc, i, lhl'": ASSIGN~mt,t Of 011.;""'11 !lAB LI!AS&5 'l'rns ASsIOX.'ttm: OF OIL A.~'ll (lAS LZASEI (Iho "A"I"""""',, ~.\od ,«",ifO ll:01:\lh,, 1, 2QQ.\ .. 7,fIO un,. M""'\,Il~ IlU.dojd,11:'. (lb. "lllT,,~vo 'rt ... 1. It IiwI ~""'1o<n n.../>;o:I\t"I ~.1)0 ... ',II<V1.1l O<!pO"I:! .... Itl _,!.{ot. '"tflo B'lj~ w, ... vtEi>l.< l6110 r .... '1;:»0 to N~ .q"'1'tOO''!'II, LJ.C. • c.l>.-..lo ~tm!ltd HtbiUty OCImpcL."Y, 7]0 t j'C!l, S~tCl, Sl!tc <41 ~ DIm,,", Cd~~ l?:l01 (" AJ~t;'l«·Ij. p~ $16:),')).L~:i o:hrr 1'))1). Uti ,'lluUc,e¢t.liom3tl.:n, 'Ih.u~cc!pt AI<i IUfflda:x:y.oC whi:b uc btr;~y ~'fd(eoS. An!~:t b.nrly .;UI. wltr.J, t:-.. • •• f" •. t"Utt, '&itpc •• p,[u\ ~"ra to) Asrt~ aU ,,; AniJ:!)Q". npl~ tl~~ ~ lr.~~ ~ mS ,~,~ oil wI "U lu.o:a t.r.lbo~ '" E.h.'b!,,, (6. "41 ... ' '""fa: o:>l er,!), [",.11: 11 tho tou .. ,e,,1 ~ 1U>lJ ~~ CX\ ZUDbI: A ~\lIaI "tu4.1"1. SOC.&h' :a. O. .~. =I. C~'JJ:S)', O:lo~aJ.:., ro lfAVll Ah'D 10 now 11>,1.<> ..... I> t';o lk>!I "rib >II wi'""''';': I'Jo r1z11., priti1t~t, IOJ a~mibee, l1::uo lI:1;v.~. <>l.1n. ~YA.;" .,,....:'.tl:ira".:.1".c An!t'~ its· ~f'tm IItJ1 atti"s;r.t.ltrCWt:'. . n..: •..... 'r~rn.: is c.u.b t."lJ. w;c:;.'~ e\"p~uUy IN'.>jt-:t t, ~le ft~:l1 tCOI lltt1 ~tI~: . 1. Thl. A.lIis,t.:r:letl iI C":I~!~t " ~ ? .. te.'Iaa.o IE'X1 S.,lo A~j)"'ot diJe4 O«<nlW ~ ml, tlf. ...l .... N»""b\t!, 2004, bct<il\1\ A~l",,, u>1 Ald""., . (<he "'l\c-thuJ 4n:m=:':).,~bli:ll e~.a.34 4:fli.!nJI tJ4li,lI!ims Y~Q rto\l,ll 1>0 U!!JlItr;l in' 0,-4::~t Al:d17u"10 m.tl!l ~ '!'.l'.)"C'ttl.r.a. or~ bun c:rl~ ~ ~~r.J h~tt''" to;:<r).t:wi~ fl~tI!t;:Jr.I.l:Il\ Co~~'~ -.tJQ ar.u i.!\:i.o n~\ ':!.'l l.ht; c.ttHn& I)~SpoJr.u-lI:l '!brt1.i11, 1h.!I !'I><,W. A",,"""'" ".·..,t .. Il, fed: JJl r.",l\l'.t::l"'" oN. tum by Nels»> ....... 1""" IhJJl bo!:'t:t Ioo.d. r.1w crall Ji;o~ tiUd. ~JItj'mb:tJ.m t..1yw.odr.M 0:\ F~~!I::'~¢I1 \)!.l:t t!an. IJ\, }-:S1-':(' foy.lty ircvl~ to. ~ \}t L~t,I.u.t v)ar ba.'4 = pColI.l'"ti~ ~t-~P8 t(rtCo:ttJ .u C'(~ W~~ l1:M. l:: &.'d~tioL\ h l'uttC.LU At;c.me:n c.w&!rJ celu!:l etC.lmt toL1I1~ r-tv:siOOJ, 20 rms ASSlti:'/}!E:{j"lS M}J)ll '/-'rnmw I'(AKJlA~lY' 07 M;Y imm llXflUtSS. JI.!PLIPD OR STA1U!OR .... ll.XCIll't T,{AT ;\ssIGNOR wAWmS 1111.2 TO Trl3 LEASeS AS 10 rna lAl\'OS FROio! /,}lD ~G,\JlIST AIL nlSO:;S CUIII.l'NG 3Y, 1IU1.0tlGll Alro Ul;»Ili A~SIGtlOR.Jltrr llor OT'J:£l\"'I~, 19 ( ( l. To .~. CXJ<Oljlb'iri1l:J by 1\ ..... AI~"'<.' 'hUj ~ ,,~, .. oI" Aul!;ll4', ti~ !n bl.U1t'pttlenl,,\icI!I,..,~ a:d ~~UlJ t!~ ... ;11\ re9"lll) \h, z...c,.Kt. h.d~; hutby /1101. ao6 ..... rr.. to ..... ll'\". 1\1 =~Ilo" tr4 ",iW, t>;'\ """,., tno>fi({);~ • ..J. v=i:'p1b)' h;w.:l!.o bd.&fil ,C'ol>.1!hS Ii';'t I> ",r..:.. iIIlm~'~ ,;p:llbtl.tl"", 11>1 ~=ti". IC ,,"Y. """',b ~~i»" It ",SiloS to Ior_ "'th "'I"<t'~<l.o Leu". ~..t;i:ly \b Ili, roo:< 00' cofOfCOol by Alllpoi-. t ..... ;£:,00 """"" 1M .,n" to p'y, ~b::n, l\l\t'.Il. ",1 !Ii~t. &l\ <lo!:ru, ~O. ~rw~ J,W,ittJu &;xl ~lln&;.a& ~c.n:h. Of ~cP, 10:10 a" Q~L a.n.1p,~lcu •. t1~I>r',"" o;.d.!titOf ~S or<fa.I"'H .. '._ tlj. t,r~ '" \I:"~ _,irol ...,a co:l.o<j,."I; ,r o!l, pi, WI.C." ~~ .. noc ~. ~1t4r, 'd&!ai ~ j\.'ilq ~ .~n 0.. rJl'tolivo tf .... ~,r. \\'I~, lillllll~"'. l'" ""U"~03 \) pIoJ'.~ rb",*~ &l\ l'(t.!!r .,,1 ""!#Ill! well hI,. ('I>I:u~!t ,~p,..l \0 1i'~JOOr in ,*~wi:!> S",!kco.Lb 0' t';UAuf_",* ~.n ""llJ!.""" iru!r., ",;J" .pto"~ «Mtb; ... ~Ll.b.I .. Il:oLt .. " .... t!.o Loob, &l\ .. W"".,;u.,loil1ItC ~rJr", 1l..l'U!~\'" hlf"-"b'L'. Irlk~ II '.~ b.l-.c:\ ,~, _ •• Ct'<l AuI~ ,d tI>.PI:l ....... A~.J.·thl ''''''' ,l'1hc l'ul"..lbo AtmtU:',I.,\IJl CO:l'h'rt mS rot ~~ d~odtc;un D.*lt4 !A~~ tuin. c!r:u.. Abfp;n:\I. . ~. ,Tho rcft[JDttl bp'M 10 Httt, 'C:l~b..'mtC-'1 h{.enr.:&~~~ L"\d o~~ ~~. Ih.:l ml be il=td1""~fy f"' ""''' "'Y ri;;ll'J !J\'llI;rd9'l'Je< 0\' ''''''l< >i,!\' .. ><lily".){roil I.~. rl~ .r ~ Of .Ala" •• , .. b,:w.",.'b,,, ... II·u, " "I I~' l, th. 1,!<.', .. A"""""" ex OIb",d_" <U<\\lod i><OllOO~ ~ ...... i~ ~. v.le .. p:D\iGea .L. ...., iJ. . tIl ="'iis It/«~. . l, )hi b.hi\lu h<r>:o ".10 '.L, of!4hl rul PIOpt;t)l 'tecnu fIo!tI:.~Otd~d Co'.:n'lt. Co):n®; Ck!.:. i..1d Ket.txd.&:. 1. A.lr.~ ''''.tll tri:W., ~lIttN&O ud .dtU'i"".l Ot-~'JtO '10, 't!~ Atc,-Jcd, scl:t~tol:1~ oM«lh'C:lt4 ,u:~ 1r.>t:J,,,,,,,~.~ t&j. • .,:h ,"",rr loti:" .. !UJ b. " .. ",."Ir nocWU'lo:a.."viJ.a~do=,:JyCv\ IlLt fU1iIDtDI ~.~ b'l.s:.ta 9f~'·I.tJi~d:nf. . l. . nir-~fP,n;n\ l..:n.h ..". "J."tb·. ..u !rl 'I!:.c b"~c6t ~t' Aai.~. cJ AaStFl"»:b1 tbtot ttr,.:ct.UO JU~I.I'X"S a1 ud.pl.t. 20 .. -\ ( ( ,-, ElO!CI1f'/)D .. ~ .... !,,~ld~, • .,., "Illll.1~,~ O~I'.JI{."".1>O~ \> b.t'or Lll po.",. .... ofC,. ",'f.:<!v~TiI:., A.~IKlllOlt: ~1tl1!OL1\IJlII>EVJ:LOr~lF+n CORP QIU.Tl<l~ STATIlOi' ___ _ cotMI'( OP, ____ _ ) ) ) The tDtt'1i:o:A& ~:A \flJ ~""hdll&d 'I):!o:O"!:1t thl. nay 01" tiO:~.'='tr. 2IJ)(. t')' P..:k It. 'S'tR.'1Lf, u l'.,:(te?lh"O Vtee Prt.lUms. !i~:on."!b~ ~",!loI'Jm~. fit ~.:.o!d.nDt.'Vab~e:.tCotpom1~ 4 H;\'J.dtt<:?Co:JS:o:l. W,U:t1l c:ylxd ~ ollh'u .",L ~ll_JOIul!>"'1't: .. : ______ _ Col 21 ( ( ST A TB o~ COLO!I..IJ)Q ) CIT'( All!> Cw,IIY, O:DENVEa. I' Tht Co:ePlr.t ~~ w" ~w~e>JI:d b:rQflI (1.' th!1_ ~')' d Dbt.~ 2001~'~1 ronllOlY ll. VI,",,,, M"",,, .fP/.. "". a ... !(ua"",. LLC, & Coloruq </oifO\l' ~llty"",,~ .. y. \1-", .. , "Yu'\l onJ o.'II,u1 ",1 Mr~W;;jt.lJo!td.: ~ ____ _ C04 22 ( ( ( l':xtnnrr "e" Att3Ch(d to Ii:'lli. :Nodll A pMt or l:1lt ctrta{n Lettt:r Agrte:1".c:r,t d.l!ed JllllUtll)' 17, Z,X5, by .M b<tw •• n P,tro!.um C. •• lop:n<nt C<-.:p",allon <nd o"vronT,,,.,o Sble 0.1 ComplllY SrATl! OF COLO:WlO COUNr{ OF GARmL!) L~ASIl AII!ENllME'-.. W"r!BRI!AS, ClIh'VRON US.A. me., """...or in In_I 10 ~ sn~. Oil Coo:~ptnr. hucInafter rt!'er:od to as "'leuc:t", whOle Sd-~fC.u !s 11111 S. \Vi!::;-..st, HOUI~o:1. Thx;e'i 71099, htl et'Ilcrtd Lv;> tho Oil ind 0'-' ~~ !n OLo-fleJ.d County ~ with P~Q'o.::n Dovel>p.."\«lt C«po:Ill. ., w:_ odd:." t. 10) P. ... t-.' .! n Sireet, P.O. Box 20. BI.&s<90'~ W." \'iIl:i.."1!t 26330, ~~~!t1tt rc.(Mtd 10 u"Lene<;". d-etcribd 0:\ the Q!tl~ Eurb.tt "A", WHEREAS, tho ~,!p1 pNtlei b:nr.o dedro ~.t lu.id lus~ de.~i'b:d on tx}it:it" AU b, SJner\:»d in th' mwl'~ htlclM~r .:l, rel ~l! NOW, TlmREFOlU!, b co:,.~id"l3tion Cflh::l pt~rrJf~ url o[tl", Uo.'llJ3 trod O"J\er :e.-.td p.)m",tt 1>:1<:<>00 plid PU''''IIOI 10 .. l~ I ..... .,,~!'e< t.'l. r.dllt·ono1«<l~d:nOO:t • rna Dcliln ~,d o:lou BOOd ..,j y&1,,~" 0<>.1':.rlmtICII, ,"";(It of .:t of whlo.~ is h,,";y o:Icn,wl,diiN by V4U~f 1boo prJu ho..~eby lSf'O:I '!.Q J"PVl.e.:M:lt a:.d l.IDeOJ rlid I~.u by toe:-JinS tnD leue.! on Rrllib~t uA'" .1 folloWJ. ';Qo"~I: Tho foll,wing !mgu1i:O lhIlI b, eJ&<l to '\0 beoU'Jling or Ar'.i<!. 6. in ooeh 1= C~ fubi?il IIA": "L'!.u:: &lIeu. that 0;'1 ,',.':fft.«: lmt, "W'tJed ~y Lu~r it 'lltill no( C«:l.-n::t;., L'ly cu!4oe Ktiy,:iu .. ~ R!'O .:10"''1::1 u.."td.=t t!'lh .~t ","itli?\ll fint £hi."t~ Lu&ot ':l:! I~n:Ct', fJr('"o 1~1#'6 :Mrt)' (lli) d.r.y, prjOf' wrl~ hOCtoo cr aU a:ti\'itit:r. Ad~Irt~:nllr. prio: ~ Nlr.men:i.-,S Ill)' nr.fa!o L!t[rily (ocher ~..tn ru:'\~T.U 0:1 lAn~r'J 'JI~O' taXI, Ltu~ will «It:: tr.Y-I l 'nitttn lur!~ tlr.ullJ ~t~l: ~&rccme::;l ~i':.' UJUO£'J ,ur!l~ In,n CO\"tk:S tlt, lp.."li!1 b Do dlsl''Ht>tj .... .J wHl p!'Q'\'jd¢. I>O'{I c.r)CM t~L:ux." 1'1 a!l o.lhec' :e!.ptca. said ]~LKl tJ-3 Lll:l-.aJ'lBod and [e."ruin in rill fn.~ !md effe:t. mW r:Nl3SS W}I8.EOF, :he 'Jooc,,:di;tlCd ;>utJes h'l't'e etocuted ~Js ) .'. moment 0:1 dl'~ ~dG jnji:ated below, I2Ssoa: CBliVRW US.A.IKe. Do" ________ _ I.IlSS1!P.: P ETROtEUM DUVllI.OPMF..'>lr OO:U'OIVJlOH By E={.I; R. Stev:m P.x~:t"o V? z,;.:>lc:a~(il c.."d De\,dOj)r..ec.l D&I. _________ _ 23 ( ( SI'AT? O? rr,xAS COUNTY OP HARlUS Th, (Ol'SOlng instrument w .. lICbow!";S.d b<Jore me 1.\3, _ dJil d ____ ~ 2X5 by O.F, B.ldwln 11 as Attom.y·!"·l'«, (er (.heY"," US.A. 1!U'.. ~.iy Cc;m\:."tt.iu!o.." E)."?!.re.: _____ _ :-1o~' Publlc __________ _ STATE Or-COUNTY CF ___ _ The !oll!gc!ng irutnur:.cnt WM aeh,Q\\';C'dged before lJl'J tr.!s __ day of __ ---2C05 by llrle R. 5' ..\ 1. ..... lix«t,tlvc VP F.xplora\lo:\ ..,. d Pood.cttDn of P,rroleum De ... ulopment CorptmLtion. My CoO". .-nh,{cn llxplre.!.: .. Nc'."yl'ubl!c . ____________ _ 24 IlXlIID1'"A" ( Edub;(A {O! ~.i. b .. , &lno;l;,,,,,,I,, U" ''''''IP,tA<!lh,,1 11,,1 iJ uJ<d u llxhibil A {or ~ I,\!ot ,grc~-:-.et'lt. ( 25 .. \ ( ( Sxa!!)!t liU", iUXhed to roo nad'o a pnt c(\Jnt c.a1,b I..a~ AD"':"twltut dltcd 1a."l'JU)' 17.20')5, cy ll)~ 1>,IW= ro:rolo-", Dmlo;xr,..,t Co:pontlol m Ch,,"\TtmTt<l>O Sh,d, 0,1 Co:npcy P:".toleJrJ Dtyd~m::rJ C¢ql¢t1.tion A!~tnl1o:l!' Dc'l't)' Oeclom ~totCanonA~:.e £VL',., CO IO~lO CoEncllt to 04 .. 111'£11 C'T'SOC 10 roc Lealtl Gu{ldd Q."hfYt toknd:. Refc=co l'IT.ad. t, L'rn, ""'.>in 0:1 <n:I O"l.eIJe' c!w:tib<d "n llJ;h;b~ "A" !(tJcb:d he."'C:Co, ~{d :caLeS be!n3 wd, , ~;U1 hueo!' by :oflrm.:.o !'ot' a!l PU:PO;!.I ID'~ hei.rG henic~u rol«re:l to AI '~lid Cit ""I at! Le.""," Refer:r.co i, fur.l:ic[ n~ I:) t:ut cer!.a'~., imt1' dltod NQ\'t.rn~~ 1 S, 20J.4, !ken ?DC "'pe.:b, Cbovron1...,., Shtl. Oil Co"..",)". (C1S0C) oo<~""t to en "~cno:eol ft= Po(:'OI:= D"'::,,,,;ro<:1! c.xpo ... :Jo, (?DC) t. p~ 0 .. R<SOU.'«I', u.c (I'OJ(), ,1ilo1~ ,*c:u is 731) 111~ Sll""'~r. Suite 410, DenvCT, CO t0202, orcpproxUr,A!e!y fifty po::: C"...ol (SO%) ol?DC'. irJcnm in tti!d Oil trId Gu l..e&.lel. ' crsoc rejectJ i'DC'. rolue~ (or n:.eh OOnt::l' a., (itU:!:u.~:1 fn its No\-::;nl):r 11* I~er, MVo-'CY('t, ~blo..'1 :0 ih", rllJ1:Jwing tefnu .r.."XI oor.dJtl'OM. crsoc h!tC~y ¢On$:;O~ to th, :<qUC<"ed wi=:nt: 1. PDC url l'GR <holl b. Job:ly aM y.\'«tIly ""l>"",lbr. to CTSOC fo< .:1 OWgUM., '.:rrJ-:; uH C>.tl tnd Gt., L.c.u~ "q to \h, :\:lugo m:i!=\~ by PDC to CO~ 2. lh~ e"L"'l1:e:. or in'..b't:&( tb':11J.o rct~ ,,-bjc~ b tll th, tal';'.Q Uld ¢o~.t!i~llJfujd Otl ..'1 d au 1..=. url tHo 'e:",,,,"'L 3. Na tum feu of &\I.,*" {\)!:res~, tr .. "mrer.ed til POR ,h,Jt 1,)0 m~., by PGR.":o thi:d ~a."ie-J ,,; Cl¢\.I\ rm;' written t.j)ptoVll otCfSOC. 26 " ( ( ( 1 r...:vetk:o. ocr .. b. I Wl.h"N cf Iho :ic:.~J Lid ra.t'ledLu eVJ,j1l1:l1o b CTSOC ~ lwlka'::la IN',nor e. I .".'tiver cf P-"IY ptQ\'id3.1 in sm 0:1 aM Gu uuc •. 5. PGll ~,.u fu..-u.n crsoc • «9Y of .. ,y i:»1t1l:n<."\l or tl$/gn",,,.II1l0d0 ;r=J~".l hac'..n with tho f~rtCna dl!t\ sho~n ~r:o.,. cnoc', """,wi ,IWI nel bcoo"",o!iood''lI UlllI.""py otthlll.n,d. ,oo:nro I. moc dgne::'I!, a.nrJ .tcned by ?OR, ~mby 1"'o;:cltbg II-..tl ",y,/)'O'.=I t>,tw:<tl fPC 1:ll1'OR .Jall b, ,ubJoc:to tJ-... b, .. t«1,.. tnd co.ill_ Very trul)" Or;\'tCnTe:-:.r.Co:I Slu,:o oncompiIIl)'. I1dtvi~:to!L.~:1 US.A. !.'JC. I", ______ AC('U'TED AND AOl\EED 1J._~. d.yof _____ .2:xl5. 3r. _________________ Title! ACCEPTED AND AO= ,rl. ___ dlY or ___ . __ ~ 2005. r:e:m:.c Ou Resouces, ue 3), ____________ _ TI,": ________ _ 27 .............. -............... ~.,.( ... -..... .. -.' f:,~lbll "E" Atttc'\ed ea -.:d tn&.d, II ~H Dflhi'll 1:(.11&111 I..cHa( A,r:cmUA d .. tod 1)t1\u.:y 1" =00". by U'ld Uc:wto.l Pd:ekJrt Dcw=o-pml:-I1t Cot'pOlWlo., It'kt Q\~'r.'Qr.ru':<J Shlh <Y.l Co..'11,;:trJ.:~Y 28 EXHIBIT "[)" Construction and ;\lnintennncc 1. Construction, The Rond shall be constructed in accordllnce with industry customs nnd standards, applicable laws and contracts, and ill accordance with the following specifications: PhasinG Summary af the Glllrdrn Gulch Road l'rojrdAtfc-n The s.cope or",'O:k ut«'f.Sa!)' to complete: the wden Gulch ROlli ptojca will u(iliu: & ... a.ric:ty M~u:tt.J incllOdll'1g but not Itmile<1 to geologists. soilJ, tn,lnctu. chil engtnwJ, hrbologfstl, ~unc:)'ir.g. drillers, bllSte~ ~XcavltOf"St dOlen, etc... IncludN in tht,o rewurCC's ,von1d be the llf\tlcipuro Ttquire(7)('nt 'Of ro,d"',)' '\0,," ,ubiliullon, meehanleaUy relr,(ort,d >oil w,n construction. d"ln.ge '?purtmsnt oomtruc~l\ln. rC\'eg,itclon.nd c(O$lon protection. The roodw.1y is 1(pa."a~C'd into thrte distinct gcoltlgkal fc:ature:, or "phHts", lhue Ut: the I..¢wer RoadwlY. Cliff Fax L'l<IlJpp<r Ro.&w.y, "" of January \, 2006, sfgnlO'OIlt ,,":tior.> o(!he UPP<' Ro,""w.y ho, e boon cons'.ructed. The p!oneer rolid for 'L~e LoW(,f R03.dw'IIY hu bee:" completed to St4 57"'50 +1., Tt.e be"'lchtn,g of the ClilY FQCC hILS swtcd A.~ iignificar.l p:-og,resi: hu been rn.ld'O towudJ obtaJntr'J& fxilC.h widthJ that wHl mo\'e the blutlng from "t:re-~litM work to "prNuttlon" work. Lowtr BUd'l,,' (5'. !)tOO 10 Sfa ?Q+}$) 1. Sic,," slaking L,d pioneer 'fib, ro.ow.y hal bun ,ompl,:ed f,am Sta 0+00 to the c"beng rocl: outcrop, !ocatC"d rJ appeaL Su 51+50, This \\ill p~o\'ide .xc.eu for drillins & bt~Jting operali('l;n th.a.t lrC 8J)tidp'a~oo !O be required!ror.1 Station 57-tSO to Station 62-(10, Note mit &!ditional acccS!l will 00 COMWctej from St2.1j~n 90 .. 3$ back. to SWion 62,,00 to (Ho\'id'e t-<:nc:hlng ft(cen for bll1'iting opetalioru. 2, Rca.1",'lj' ClCI\'lt!on can occur from Sta 0+00 :0 57 f 50 during the "ons~'tion of the Cliff Faoo sectio~ of IOoJy,~y (9Q' JS to IlS«<», J, One.e Cliff fllce seo..'1l()11 ofro6:!wty hCl pro\'jded Ilrce5:S dow!I to StI19!>+3S. contnctor Vlill ~ia pinnter (]( TO~th"'&Y ~OWl1 Italian to 83"'50 -I. At 83-l0, it i, Illtkip.tO<l t~.t drilling .,d bI&lIi,S op<",!ion, "iii b< .. "wmy t. he condu'ted from 83' SO down J.tl.tion (0 80too+I.. Du."ing drilling tnd blasting of 83+50 to 80.l00. roadway cxc.s.valion c.t."\ be ,omp:':tod from 90-lS dO\", to 83+l0, .. , Once drHlirlg and bl.~t!ng it c.ompletoo flem 83+50 to 80--00, pioneer of ro.tdwlY Ca.1 a&tin r.e .l.chle\'ed froln 80·0:) to 70+S0. At 10+50, it is antlcipa.u~d thlt clrilUng IJld blas.ing cpcl.l.liOfJl ,\iJl be nt,(.s.~y:o be cOr.ductN (rom 10+.50 C:own stwon 10 68+50. Duri."lg rl;illitiB. and btrutinK of 70+50 to 68+50. rol\:h"y ex.:o\ .. ,~tlon can t-.e oompleted from 80100 to 10+50, 5, Once drilling Md bluting is comp;elcd from 70. SO to 68+501 c~:m'.nt'!or "'ill beg;[~ pio-nc(! fJO%:l 6St 50 to 62-+00. At 62+001 It is: antldp,uoJ lhlt t}',<; finil QJ'C.t of prod:;ct:on dJiliing .1:'1<1 bl.l11ing \\iII be required, Prom 62+00 down sWion to 57+S0, it {, lJ1tkip:U('d th.u drillt:lg and blasting is required During dliWng and blasting of 62 .. 00 to 57+50, roooway eXC-a\'a1io:1 can be tomplcted tIo;n 68+ SO to 62+00, 6. During roadway ~a\'at!o:ll lmtrtHe!lon of dr&lnlge f/lldlhie~ eroslo:l c:onlrol e.nd re:, C'gcta1iDn \Jf di!o..'1Jrbcd ,lop" "ill b< cor,du'lw, Th' i",tall,,;on of 24" di.meter HIl1't: (ul"ert pipes .iII bo """"lIY on approxitt'lltely ~OO' ceoten:. 7. Also dUTing rOl.dwA), C'.XCf.\'l1tion. installr.:jon of slope reinJorcr:nent will be pufonnt:j. 'nl~ !l.'mJur.l a~J l~tiL'ns of 5io-pe reinfotJ;cmcllt "ill be dtpendent upon CLJIlditioM cnco~nterd ill th~ field. 29 C!if£ Flte Roadway (St. 20+50 tp St! 12S+00l I. neSln L'or~tructto:l of pionrct Nid at t~o 7960 ~Otltwr to erubt!sh " bc~dl r",r d .. ilHng a.'"Jd blAAlng QP<:ation.. SWI pio:>", road .1 125.00 .. oJ promd northword 10 ?HOO -/" lbl. "o:\( hu be," compl'lcd. 2. Continue drilling Uld bl.u:tinZ of IS' \\idc x SO' I!ecp road cut1 from 7960 do\\~ to 1810 contour. At 7310 rontour adju~ "idth orbcn~h to o;l.imlz.e ,ut down to TOldw'l), d~~·ltion. ). Begin ,oni:~"'Udon (If plDnett ro:d kt thl! 7960 eotlto~r (!I' ,~tjon 12S+OO) to ti,e wuth, Jo"ll Jtuicm to tho. 119+00 cO'nIDl:r +1-, Thi! bench ",ill Jhcl!itMe dri)JIng and. blAsting o~tionl to 10r the tD~\\'I.)' louth of and down.bill of 12S.00. ~. !Juring blulu:g operalio", on Ihe nonh .100 oflhe CliIT F"" (90tSO 10 105.00), <>c>vuio, Uld :<:>1Oy<l of blul debril will be petfonned on Ibe south .Ide (12$-00 to IOStOO). 5. Ih,u:& bltslu:g op,nti,n on L~' south 'ide of the CIiIT F>« (125-00 10 I OS-OO), "w·.tion wd "rooval of bl'll debri, will be p,,(orrnod on the north lid, (90150 10 105'00). 6, As e.i.ch bene." is. comph:ted. fine grade the benc.be.J to ~{lmrnodatc dralnl8e, The ta: of 11cXlblc penor,alro 4" di3.."ncttr ADS piping, "X~x61ceS IlId 6" solid waH flexiblo p-erfor&:ed ADS plp~g , ... ill be uS<'d to c.c:ICl:l drnnage wlter and u· .. ·uport it from I):1C beorh down to the nell. The: fkx..ihlc ADS plP{l'It ",ill be: 1l1iHl.eJ by the t{\(ltnt:t.N' 10 best d[rcct runofhway from hl1 ,","Or}: El1US duri~! c¢ns.tn.:ctioo. 7. Dl:rin& roa:iwlY c:xcl\'icio~. ir.ru.llatio:l of p:rmilIK'tlt drt.int.ge fCKHitles. erosion cont:'ol fI."ld re\'ege~llon of disturbc-d i.lopc'.l wilt be conducted. Tba i:l.~!1l.lation 0(24" diJmc:tc:r UDPE CtI!\'Cft pi~, will b: r.r;.;;:cS'WY on lPP'foxt;n.,tc:ly $00' centers. S, /\110 during road\\ay exu\,,ttio:l. i:1rtalialion of slope rc:infon:c:mer.t \,ill be per(onned. The ftlnour,t IImJ !oc.a[iom of slope rcin(ofCrnlCllt \\iU be-depe:u:!cnt upon conditiom enco'.l.lltc:-ed In t.'1e field. lJlmH Rn.dw", ISIR 12$-+00 tD-End or Pr(!lrsU I. DI,;Iing. oons-.ruct!on or the C1I11' hce work (90+S0 to 12S"'00). the N.rt..'l\\(}l'k ~cntfi1'l()' will be f.1blc to COntINI;{ the rtmAin[ng roM-way. This Is from 125-+00 ~o IIpproxi~cly 140"'S1. At J.40~ 87, the con'lrl!('tor h" ,"b,Il\,,,I.Uy oompl,lw rol~ work ""m'at/on to me ~ld ofth.Jo~ 1651()(HI·. 2. COnL'".ICtc':D c-ut the d."'31r.ag,e lntet«pt t!itch IC:O~S the llJP oftl'.e cllff f~e wmk abovc stH:Ons 90+$0 back soutb. to 125 H)O +1 •• Contr.<1or to itUtI!lt II 2 foot ~ecp dJtch ,\jt!, 2: 1 ~ide s,lop:s U Ii mintmum "<lode of 2%, Ditch ii to drain !'ror:J north to south. J, OUrtr.s: rOldwJ.Y eXc.A\'at!O:'l, !mt.1l141ion Ofper:nlll¢nt c!r.1inase trlc~Hlies, crosio:1 cOIltrol r..'1d rc\'egc!J..lioo of di5:urb:-d ~11)pe5 \'fill be wn~ucted The inultla!ion of 24" di~ttr )lDPE co}, tn pipc:J will be 1lC'(c~a!)' 0:1 trprox!rnately 500' centeJ'$, 4. At the 12S+00 a.nd 105+00 stuicru, the in.'>tallatj~m of 36" diarn~ler HDrE t'Jh'e'lt p:pe is M:lcip&:.ed. Simil.r.)' '1 Ihe 117~O wd II H)O ,t>t1on<. ~~e insrall,l;o" of • )0"' d;lJ1l,lcr HDPE cui"" pipe i. a.1t:cipuc.1, 5. Abmt 12~+()O, tnd bACk ~tatiOIl to 117-+00, dlC L:cr,tr.tc:or to cutlllO draJnage ir.tm;(:pt dik:l IlC;OSS thc lop o(lhc roadway to ir:!e:ccpt offsitc flows to th: culvert pipe.s to be instalted et 117+00 and 112tOO. 6, COIl~\Jct s.afet)' lKmH, drlinllee C1Jt-<lut~ fi::Je &fade tnd [n5tJlI Type .t (jC:fle),) barrie: a.s the roadwa.)' sec!ionli UfO completed :0 pro,,'Jde: Mfc: access to the wo~ mas. 30 Gencral Comments tnd C(JnlldcntlClQI l. [>tning construction of the project, on·going $W"\'cy activities ,,,ill be required to co!lfinn qU211titie~. lS·bulll ""ndltior~ (re)lli," to d .. lgn) and to ,.,IIY the ,"une), of the topagroph)'. 2. Bt(ousc of \'cT)' limIted ~es.s. the on.going S\JJ'\'c)iflg wlll be roorJll\a.tod ~i~ the C(m~iors on 11 dally b;.uis liO uta fr.cilitLlc con~ct:on.. TIlc dfl)'llght lines and 11gbt o( WI)' 1[:nits Wl-not b:: saftly staked fwm 9O-}O do,m sUlloo to ~7.50 \l:)tl) to.d",y cor..wclion prOlid" ."',.., 3. Du.r:ng. eonM,ruction ofthe proJt<t. it is a:l'Jclpal:d that a nriety of o.'U.§. will be [o'J:}J to h.a"e unstablo slo]>C IJ1d (OUJ1dl~jon mas. Thes::: ce,lI wHl be field t\'alW\!ed by Yeh Il.,d MsodAte~ Uld mu.r.s or stAbili,a!(on "ill be dl«ctcd by y.h. 4. TIle roAdt.\-ay c:rou section being pro\'id~ (or this proje<;t l.J a 26' pTa.:foNU width wilh iI 3 foot high bu.n 011 the down hill 'ide llld. 1 foot d"p dlt.h 0' the up hili ,Id •. ~. Th. ,,,,,,,Imwn grad. from 90-35 op .1oIio. I, 10%, lllrougll tho $witc.~ b>c" ar .... tho mwmum groJel, 51~ 6. Alipunc-ot a.,d profile &tades rer.ub the wne from 0.00 to a8-+00 Il'i pro\'idod by Construction S1.lfny~ in th"r design oflh. roW"'!y. 1,!\1, i. In light of the rIOt thot tlt. rood".y hu already be", ,)opa su.kod Q.od pior.wod l>C<ordlngly. On ... "ion or 12% roodw.y i, noted !'rom station 3&' 50 10 611QO. 2. Maintenance and Operation. Operntor shall operate and muinlain the Road on a twcnly-four hour basis following the construction of the Road. Such duties shall include: B. ylaintcnancc: Operator shall be solcly responsible for mainlaining the Rond in good working condition at all times. The quwltity and quality of mnintcnance shall be in the sole discrelioll of Ihe Operator. Maintenance shall includc, but not be limited to, grading the Road to alleviate damage caused by wenr-and-tear or other usc; repairing damage caused by weather conditions, such as rain, flood, excessive mud, snow, etc,;' periodically adding gravel or appropriale road base when necessary; clearing the Road of debris and obstacles; plowing the Road of snow when necessary; repairing fence lines when required; and maintaining access gates in good operating condition. b. Security: Opemtor shall ensure security of the Road. Security shallmcalllllailllaining the Road for its intended \l5C and purpose as a private road. Operator shall have sole discretion to detennine the measures necessary to maintain security, Security shall include, but not be limited to, maintaining controlled access points to the Road; installing, mnintaining, and opcraling nny locked gates; inquiring as to allY individual(s) traversing or otherwise using the Rond; inspecting the integrity of WI}' fence lines designed to keep animals and or Ii\'eslock off of the Road; and. where appropriule, intbnning locnllaw cnforcement authorities of trespassers, c. Addilional Services: Opemtor shull pcrfoml such additional ser\'ices with rcspect to the operalion and maintenance of the Road as may be necessary from timc to time. 31 ) ) EX.HIDIT "E" Pa\'lllell! Cost Sharing. Participants shall bear in the followin8 perccntages (c<lch, a "Sharing Perccnlage") Ihe costs IIl1d expenses ncccssary to COIlstruct, opemte, and maintain the Road ("Road Expenses") during the period ending on Ihe second anniversary oCthe EOeclive Date: ~nrnthon: 25.000% Williams: 25.000% PDC: 2S.00OY. Berry: 12.500% PGR Partners: 6.250% Tc!ol1 Piccanc~ : 6250% TOlnl: 100.000% After said sccond anniversary, Participants agree to usc their collllllcrciali)' reasonable cfions to negotiatc a new agrecment as 10 the sharing of such Road Expenses, taking into account thenapplicable facts and circumstances. Participanl~ shall eontinuc to bcar their respective Sharing Percentage shares of the Road Expet1ses until II new agreement is exccuted and delivcred by all Participants; provided thaI if thc Participants are not able to cnter a new cost sharing agn!clI1cnt by the 90th day following the sccond anniversary of thc Eficctivc Date, the Sharing Perccnta!>cs set forth above shall upply to Road Expenses incurred during the balance of the tenll of this Agreement. Each Participaut shall be severally liable for its Sharing Percentage share of Road Expenses due to Operator hereunder. I. Payment and Rcimhu[scment of Rond Expenses. Operator will be responsible for paying up-front uny Ilnd all Rand Expenses. Unless such Road Expenscs nre subject to Scction 3 below, aOcr paying the same, Operator will seek reimbursement from ellcll Pm1icipant fol' it> Sharing Percentage thereof. 11le Opcmtor will iJwoicc each Participant for its Sharing Percentage of such Road Expenses. Participants shaJJ I'll)' such invoice within thil1Y (30) duys of receipt. 2. Authoritv for EXJ!cndit\lr~. Prior to the expenditure of any amolllll of fl:nds to constmct, operate, or maintain the Roud in excess of FIFTY THOUSA:-.lD DOLLARS I"''\[D 001100 (S50,000.00), Operator shall provide ench Participant with an Authority For Expenditure ("A FE") detailing tho total anticipated costs or expenditures. The Operator shall have sale discretion in calculating the alllount of costs and expenditures and determining which costs lllld expenditures to include in u single AFE. The Operntor will provide caeh P(lrticipont with nn invoice of the proportionate shure owcd by it for each AFE. Pllr,ieipants shall pay Opemlor their share of the AFE witllin thirty (30) days of receipt. 32 EXHlIllT "F" Insurance Operator shall carry and maintain the follo\\;n& insuIlUlcc for the benefit of itself and the Participants. A. Worker's COIlllli:ill.l!.tion Insurance. Worker's Compensation Insurance covering cmployees, in compliancc with all applicable State and Fedcral Workcr's Compensation laws, and Employcr's Liability insurance with a minimum limit of onc million and NollOO Dollars (SI.OOO,OOO.OO). B. General Liability. Such General Liability insurance shall be cndor.;ed specifically to include property damage co\'emge arising from cxplosion, collapse or underground damagc, products/completcd operations liability, broad form contractual liability co\'crage which shall provide coverage for contractual liabilities and indemnities assumed herein, and shall have n limit on one million and 1\01100 Dollars (S I ,000,000.00) per occurrence for all bodily injury, illness. death or property damage. C. AutQmobile Liability In s uranc~, Automobile Liability Imuffillce including passengers, covering automobiles 0\\11Cd, nOll-O\\1ICd mldlor len sed by the owners and producers, shull be covered with a limit of not less than one million and NollOO Dollars (SI ,000,000.00) each accident for bodily injury, death or property damage. D. Umbrella Liabilitv Covemge. \..'mbrclla Liability Covcmge \\;th limits and serving to increase the limits of said covemges four million und Noll 00 Dollars (S4,000,000.00) nny one occurrence, in excess of the coverage outlined in A and B above. Losses for which no insurance is required to be camed or ill cxcess of the limits set fo rth above, shall be home by the Panies in proportion to their respective Sharing I'ercentoges. Panieipants are granted a \\'!livcr of subrogation us respects the Workers' Compensation I Emplo)'er,s Liability Insurance required herein. Each l'al1icipant sholl be an additional named insurancc on cach policy. When Recorded Please Retum To: Petrolellm DevcloplllCl1t Corporation \ 7'15 Shcrman Street, Suite 3000 Denvcr, CO 80203 Alln: lenni Iv\ul!cr 33 · I! .. North ACCB,\S 0'0'0 , ';.-:{jj";;;;::: M'=' .... Nr~N' 6 n HOlE: All VOIUIIIOEI n~tlccl pnnon90r eM o-qulynlOIl!!o LEGEtw •• ",nil _ AM(Noon)[PM] Peak I-lour Trairlc VOlllI'WS 3200 county Road 215 Parachute, co ) ) July 8, 2011 Phil Vaughan Phil Vaughan Construction Management, Inc. Construction Manager 1038 County Road 323 Rifle, CO 81650 HANKAJu) ENVIRONMENTAL c.-c:'":"-'=_ ~ -=o= :;=--~ ~ AcouS! ( $ ." 0 V S~"'! IO " C O NHl1l~ o;. Re: Noise and Vibration Compliance Analysis for Williams TR 41-35-597 Communications Facility Dear Mr. Vaughan, This report describes the results of Hankard Environmental's analysis of noise and vibration from the proposed Williams TR 41-35-597 Communications Facility to be located north of Parachute, Colorado (Garfield County). A summary of the analysis and results is provided first, followed by more deta iled descriptions of applicable regulations, the proposed project, and analysis methods and results. SUMMARY OF RESULTS Noise levels from the proposed Communications Facility (Facility) must comply with all applicable noise-related provisions of Garfield County's Unified Land Use Resolution of 2008. Paragraph E. of Section 7-810, Additional Standards Applicable to Il1dustrial Use, states that 'The volume of sound generated shall comply with the standards set forth in the Colorado Revised Statutes.' Given that the proposed Facility is part of larger gas development operations, we take this to mean that noise levels must comply with the Colorado Oil and Gas Conservation Commission's Rule 802, Noise Abatell/ent. As explained in more detail below, the applicable noise level limit therein is 65 dBA at a distance of 350 feet from the Facility. Hankard Environmental constructed a mathematical model of noise from the proposed Facility that included all significant noise sources (wind turbine and backup generator). The model predicts that the loudest noise level at a distance of 350 feet from the proposed Facility will be 41 dBA, which is significantly less than the 65 dBA limit. In terms of vibration, Paragraph F. of Section 7-810 of Garfield County's Unified Land Use Resolution of 2008 states that: 'Every use shall be operated so that the ground vibration inherently and recurrently generated is not perceptible without instruments at any given point of any line of the boundary'. Ground vibrations from the small tower mounted wind turbine and 25 kW backup generator are not expected to be perceptible anywhere outside of the Facility's boundary. COLORADO • WISCONSIN • MAINE phone: (303) 666-0617 • www.hankardinc.cam • fax (303) 600-0282 HANKAlID ENVIRONMENTAL -..c--;c: __ -::--~~ -0:>-) A c o U I' ( I o 'HI " !<A "IO '; C O ', h. ' ', r. DESCRIPTION OF THE SITE AND PROPOSED PROJECT Figure 1 shows a site plan of the existing and proposed site layout for the Communications Facility. Major noise-producing equipment will consist of one tower-mounted wind turbine (Whisper 100) and one propane-fired backup generator (Generac QT02524ANSNA 25 kW). The backup generator is proposed to be housed in a fiberglass building. Figure 2 shows the location of the proposed Facility with respect to the other oil and gas operations in the area. ~ \ \ . " •. , ......... <'.' .•. , \\ \ ,0'·0" 35'·0" CUrrent Existing Layout Figure 1: layout of the Existing and Proposed Communications Facility (copied from The Williams Companies) Noise alld Vibratioll COlllpliance Analysis for Willimlls TR 41-35-597 COlllllll/llications Facility ll/Iy 8, 2011 Page 2 ) Legend • Prqect Site --Road Proposed Communication Tower Relocation Partel Owrershlp (trom Garfield County) Figure 2: Location of Proposed Communications Facility (copied from The Williams Companies) HANKAJlD EN VI RON MENTAl_ C:-C::c -==--~~ =-:-A ~Ou!! C 1 '>1 0 V a tA'IO ', C o ·, s<, ! ~ c; w;llfiJ~. ~ Noise mId Vibmtioll COlllpliallce Allalysis for Willimlls TR 41 -35-597 COlllllllllliratiollS Facility lilly 8, 20J J Pnge3 APPLICABLE NOISE AND VIBRATION REGULATIONS HANKARD ENVIRONMENTAL c::: c:::.-;: ~ -~~ -::::>A COul"(~ • •• 0 '1 1~.r,o " C O " ~l.' -, e; Noise levels from the Facility must comply with all applicable noise-related provisions of Garfield County's Unified Land Use Resolution of 2008. Paragraph E. of Section 7-810, Additional Standards Applicable to Indu strial Use, states: 'The volume of sound generated shall comply with the standards set forth in the Colorado Revised Statutes.' Given that the proposed Facility is part of larger gas extraction and processing operations, we take this to mean that noise levels must comply with the Colorado Oil and Gas Conservation Commission's (COGCC) Rule 802, Noise Abatement, which was adopted under the provision of Colorado Revised Sta tutes §34-60. The noise level limits contained in the COGCC Rule 802 are shown in Table 1, below. The limits are dependent on time of day and on the land use occurring on surrounding properties. The proposed Facility will operate 24 hours per day, thus the more restrictive nighttime limits apply. In terms of land use, COGCC Rule 802 states that the limits for the 'light industrial' zone are applicable to facilities "In remote locations, where there is no reasonably proximate occupied structure or designated outside activity area ... ". Based on our understanding of the surrounding area, the nearest occupied structures are multiple miles away. Lands adjacent to the proposed Facility are owned by Chevron USA and/or are leased to Chevron USA by the U.s Bureau of Land Management (BLM). In consideration of all these factors, we believe the Light Industrial nighttime limit of 65 dBA is applicable to the proposed Facility. Compliance with this limit must be achieved at the property line of the Facility or 350 feet from the noise source(s), whichever is greater. In this case we have assumed that compliance needs to be achieved at the 350 foot distance. Rule 802 a lso states that impulsive type noises are subject to limits 5 dBA lower than those listed in Table 1. There are no impulsive sources associated with the proposed FaCility. TABLE 1 COGCC MAXIMUM PERMISSIBLE NOISE LEVELS -dBA Zone Residential I Agricultural! Rural Commercial light Industrial Industriat Daytime 11). 12) (7:00am to 7:00pm) 55 60 70 80 Nighttime 12) (7:00pm to 7:00am) 50 55 65 75 II) During the daytime, the noise level can be increased by 10 dBA for 15 minutes in anyone-hour period 12) Noise level limit decreased by 5 dBA for impulsive type sounds. Noise and Vibmlioll COlllplinllee Allnlysis for Williallls TR 41 -35-597 COllll1llll1ien tiolls Fneility jllly 8,2011 Page 4 HANKAltD ENVIHONMENTAL e:--<: ~ -=-----c::-~ :s;;-A !:Oul' CI ~ .. D J II.' \ CC ~ !" " , 0:. In terms of vibration, Paragraph F. of Section 7-810 of Garfield County's Unified Land Use Resolution of 2008 states that: 'Every use shall be operated so that the ground vibration inherently and recurrently generated is not perceptible without instruments at any given point of any line of the boundary' . ACOUSTICAL MODELING PROCEDURES AND INPUT DATA Noise levels from the proposed Facility were pred icted using SoundPlan v7.0, which is an interna tionally recognized three-dimensional acoustical modeling program that utilizes propagation algoritluns from ISO 9613-2 Attenualion afSound During Propagalion Ouldoors. The Facility consists of two primary noise sources: one Whisper 100 wind turbine and one Generac QT02524ANSNA 25 kW propane-fired backup generator housed in a fiberglass building. The sound power level (spectrum and overall level) of the Whisper 100 wind turbine was taken from the Wind Turbine Generalor Systelll Acoustic Noise Tesl Reporl for Ille Whisper H40 Wind Tllrbine, National Wind Technology Center, National Renewable Energy Laboratory, June 2001. The overall noise level for the Generac 25 kW generator was taken from the manufacturer's specification sheet (60 dBA at 7 meters). The overall sound power level was then calculated and a typical generator sound spectrum was applied. No noise reduction due to the fiberg lass building was included in any calculations (to be conservative). The sound power data used in the model is provided in Table 2. Also, noise levels were calculated using flat terrain with a somewhat reflective surface (ground absorption coefficient of 0.1, where 0 is refl ective and 1 is absorptive). Overall, it is felt that this noise model is conservative and it is likely that actual noise levels will be quieter than what is reported herein. Typical accuracy of these predictions is ±3 dBA. TABLE 2 Sound Power Level (PWL) Input Data Noise Source 31.5 63 125 250 500 1000 2000 4000 (dB) (dB) (dB) (dB) (dB) (dB) (dB) (dB) Whisper 100 Wind Turbine 104 94 89 89 84 77 72 64 Generac OT025 25 kW Generator 75 77 82 81 79 81 78 76 Noise alld Vibrnlioll COlllplianee Allalysis for Willi",lIs TR 4 J -35-597 COlllllllllliratiolls Facility lilly 8, 2011 8000 Overall (dB) (dBA) 54 85 67 85 PageS RESUL 15 OF NOISE COMPLIANCE ANALYSIS H ANKAlID E NVIRONM ENTAL c:--c:: __ -=---~~ -~ ) .... <:OU!· Cl . ', 0 V '"~ "O " C o ~ " . " f> The predicted noise levels 350 feet from the proposed Facility in each ca rd inal di rec tion are 41 dBA. These levels are considerably less that the applicable COGCC Rule 802 noise limit of 65 dBA (light industrial -nighttime). Thus, the Faci lity is shown to be in compliance with the applicable noise regulations (Garfield County Land Use Resolution Section 7-810 (E), COGCC Rule 802). RESUL 15 OF VIBRA liON COMPLIANCE ANALYSIS Ground vibrations from the small tower mounted wind turbine and backup generator are not expected to result in any perceptible ground vibrations. The generator wi ll be isolated from the base per the manufacturer. Thus, the Facility is expected to be in compliance with the applicable vibration regulations (Ga rfield County Land Use Resolution Section 7-810 (F)). The analysis and results described herein are considered to be complete and accurate based on the input data and assumption described above. Please call me at (303) 666-0617 if you have any questions. Sincerely, ~?~ Jeff M. Cerjan Senior Engineer Cc: Mike Hankard, Hankard Environmentallne. Noise alld Vibrntioll COl11plin/lce Allalysis for Willial11s TR 41-35-597 COllllllllllira tiolls Facility lilly 8,2011 Page 6 ) TR 41-35-597 UI~"·~ rrl,ilamS,.~ ,./~ COMMUNICATIONS TOWER RECLAMA TION PLAN June 2011 Rev No: 0 Prepared By: HRL Compliance Solutions, Inc. Table of Contents Introduction ......................................................................................................................... I Site Characteristics ....................... ................................................................................... 2 Final Reclamation ............................................................................................... ................ 2 Stage One (Removal and Di sposal) ................................................................................ 2 Stage Two (Substrate Preparation) ............................. .................................................... 3 Stage Three (Planting/Timing) ....................................................................................... 3 Storm Water Mitigation ...................................................................................................... 4 Best Management Practices (BMPs) .................................................. ............................ 4 Reclamation Monitoring ..................................................................................................... 4 References .............................. ............................................................................................. 5 APPENDIX A MAP OF LOCATION ........................................................................ .. APPENDIX BAPPROVED SEED MIX ..................................................................... . TR 41-35-597 Communications Tower Reclamation Plan June 2011 ) Introduction .IU.·1 ""'~lams . ~ This Reclamation Plan (Plan) describes procedures necessary for the reclamation of the TR 41-35-597 Communications Tower site located on the existing TR 41-35-597 well pad in section 35, Township 5 South, Range 97 West, in Garfield County, Colorado. This Plan will cover re-contouring, reseeding, noxious weed treatment, stonn water mitigation and monitoring of the site. The plan is twofold: reclamation of the pad once the well has been plugged and abandoned and reclamation of the site when the communication tower has been taken out of service and removed. The reclamation of disturbed land is a critical component when creating a system where ecological functions and values are restored once the ground di sturbance activities have ceased. Rehabilitation of the disturbed area assists the natural ecological processes to move towards a self-promoting condition. Once a self-supporting environment has been established, the natural processes of the location can take over and continue the rehabilitation processes with minimal intervention from outside parties. The costs associated with the rehabilitation process will be minimized to the operator if proper treatments are taken initially to ensure the best environment possible for rehabilitation treatments to succeed. Bonding is required for oil and gas lease operations (43 CFR 3104, 36 CFR 228 E). The operator must identify which bond wi ll be utilized to provide the coverage. The bond will cover the activities the operator perfonns including, but not limited to: plugging leasehold wells, surface reclamation, and cleanup of abandoned operations. The Colorado Oil and Gas Conservation Commission (COGCC) 1000 Series Reclamation Regulations declare that reclamation activities will take place no later than 12 months after operations stop on non-crop lands. This plan is designed to provide guidance conceming reclamation activities for Williams land managers once the site of concem is no longer utilized for operations. The area to be reclaimed shall be kept as weed free as practicable of all undesirable noxious weed species. Weed control measures shall be conducted in compliance with the Colorado Noxious Weed Act (C.R.S. 35-5 .5-10I.et.seq). Storm water mitigation will be in compliance with the Colorado Depat1ment of Health and Environment (CDPHE) Water Quality Division General Permit Series COR-030000 and COGCC 1002.fregulations. Procedures identified in this plan apply only to the defined area of the TR 41-35-597 pad and communications tower location. Personnel working on this project should be familiar with the reclamation plan and its contents prior to preliminary construction activities. TR 41-35-597 Communications Tower Reclamation Plan Page I June 20 t I Site Characteristics Williitris. ~ The site is located approximately 22 miles northwest of Parachute, Colorado in the NE 1/4 of Section 35, Township 5 South, Range 97 West. The location is approximately 8,700 feet in elevation and receives around 20 inches of precipitation per year. The number of frost free days ranges from 65 to 90 creating a growing season of approximately three months. According to the Natural Resources Conservation Service (NRCS), the soil type within the disturbed area of this Project consists of one general soil unit. • Parachute-Irigul complex (5 to 30% slopes): This unit is found on mountain ridges and crests and sides of hills. Elevation ranges from 7,600 to 8,800 feet. Average annual precipitation is 18 to 22 inches. Average annual air temperature is 36 to 40 degrees and the average frost free period is 65 to 90 days. Parachl/le soil makes up 60 percent of the soil unit and lrigl/l soil makes up approximately 30 percent of the unit. Parachl/le soil is moderately deep and is well drained. Permeability is moderate. Available water capacity is very low. Effective rooting depth is 20 to 40 inches and runoff is medium to rapid, erosion is slight to high. frigid soil is shallow, and well drained. Permeability is moderate, available water capacity is low, effective rooting depth is 10 to 20 inches, runoff is medium and the erosion hazard is moderate to high. Native vegetation found on this soil is mainly Arizona fescue, lettennan needlegrass, Columbia needlegrass, and big sage with smaller amounts of serviceberry and low rabbitbrush. Final Reclamation The final reclamation process has 3 stages to be completed in sequential order. Deviation from this sequence could have undesired revegetation results. In accordance with Garfield county noxious weed management, noxious species will be treated before construction activities begin. Reclamation processes will occur no later than 12 months after activity ends and reclamation activities will be in compliance with CaGCe regulations, Series 1000 Rules. Dust suppression measures are required under the Garfield County grading permit, and will be implemented when applicable. Each stage will be applied to the reclamation of the well pad and tower location, should the tower remain after the well pad has been plugged and abandoned. Stage One (Removal and Disposal) All manmade structures will be removed from the site by means of backhoe, bulldozer, skidsteer or other appropriate heavy machinery. Structures may include, but are not limited to: straw bales, wattles, silt fencing production equipment, separators and other equipment used for the production and extraction of natural gas. Wooden stakes used to secure wattles and straw bales and other waste associated with operations on site will be disposed of properly. This includes any trash left behind on location such as pipe fittings, used lumber or rail road ties, and miscellaneous items that have been discarded. Petroleum waste products if on site, should be contained in secondary containment and disposed of properly. Gravel and large cobbles installed on site for surface stabilization controls will be removed. Disposal and/or reuse method of gravel will be left to the TR 41-35-597 Communications Tower Reclamation Plan Page 2 June 20 II ) ) ""I,',',','a~ms . ~ discretion of the operator. Temporary fencing put in place during operations will be removed. Existing fences within the designated area of the TR 41-35-597 well pad and Communications Tower location will be repaired, replaced, or removed as agreed to by Williams. Stage Two (Substrate Preparation) The condition of the soil is very imp0l1ant for the establishment of a healthy selfsustaining environment. Locations where the soil has noticeable spills will have the contaminated soil removed or remediated, and disposed of in accordance with Garfield County and COGCC waste management regulations. Once the substrate is void of chemical presence, and gravel that was applied to the location during operation has been removed, reclamation work associated with the soil may commence. To alleviate soil compaction, the substrate will be cross ripped to a depth of 18 inches. In areas that a depth of 18 inches is not attainable due to shallow bed rock, the furthest extent will be accepted. Cross ripping will take place when the soil moisture is below 35 percent of field capacity. The cross ripping is specified by the COGCC under the 1000 Series Rules. The substrate shall be contoured to emulate the surrounding lands topography. Pre-disturbance photographs and visual extrapolations are to be used to create this contour. Historically thi s site has had gently sloping pre-existing contour elevations with no major drainages to replace. The soil used to contour the landscape will be applied in accordance to the order it was removed (i .e. first off, last on). This practice will ensure that the soil is applied to the appropriate horizon from which it was taken from initially. Salvaged topsoil will be distributed across the entire disturbed area at a depth of six (6) to twelve (12) inches depending upon the landowner use agreement if possible. Should there be a shortage of topsoil available on site, the contractor will be responsible for replacement of lost or degraded topsoil with topso il imported from a Chevron approved and cel1ified weed-free source. Stage Three (Planting/Timing) Seedbed preparation will consist of scarifying, tilling or harrowing seedbed to a depth of three (3) to four (4) inches post ripping. This will occur just prior to seed ing. Drill seeding will be performed at a depth of 0.5 inches, seed will be covered with soi l and lightly compacted to ensure good seed to soil contact. Seed will be applied using a rangeland seed drill with a seed release and agitation mechanism sufficient to allow seeds of various size and density to be planted at the proper seeding depth. The seed mix for this reclamation project will be an approved Chevron Reclamation Seed Mix (Appendix B). Cel1ified weed free straw will be applied at a rate 2,000 Ibs/acre and crimpled in place following drill seed ing. Ideally planting will occur in the fall , before the first snow of the season, early-October is optimal. If possible, pl anting should occur in juncture with a predicted precipitation event. By positioning the seed below the snow fa ll or rain, the seed will receive good contact with the soil and utilize the benefits of the precipitation. Spring planting can be conducted after the fi'ost line is gone from the soi l. During final reclamation, the Chevron Reclamation Seed Mix will be used. TR 41-35-597 Communications Tower Reclamation Plan Page 3 June 20 t t Storm Water Mitigation Best Management Practices (BMPs) ......t ., ,'t,.a~ms , ~ To avoid erosion of topsoil and seed transpOlt from stonn events, Best Management Practices (BMPs) will be insta lled where applicable on the perimeter of the location, Given the location of the site, surface roughening, and pocking will reduce storm water impact and capture and retain precipitation. This will aid in the gennination of the seed and increase seedling survival. Reclamation Monitoring Monitoring of the vegetative progress is vital to ensure that proper procedures were implemented on the location. Monitoring will allow for early response to potential problems encountered during the reclamation process. Identifying challenges to the reclamation goals at an early stage will allow for adequate time to fonnulate a response to the situation. By catching and fixing problems early in the process, the future costs associated with rehabilitation will be minimized for the operator. If the treatments do not show the desired outcome, additional actions will be taken to reach reclamation goals. After the source of the problem is identified, careful attention will be paid to the timing of the supplemental treatment. If treatments such as seeding are not calTied out at the proper time, the treatment wi ll not be effective and the operator will effectively increase rehabilitation costs. Monitoring activities will examine several parameters including: the condition of implemented BMPs, growth state and success rate of areas seeded, presence and location of noxious weeds, and possible sources of failure for reclamation processes. Photo documentation is required for all the above parameters for high-quality progress tracking. After the initial reclamation amendments are applied, and CDPHE requirements of 70 percent pre-disturbance levels have been met as well as COGCC requirements of 80 percent vegetative cover are met, a tri-annual monitoring scheme will be implemented. Monitoring activities will occur in the spring, summer and fall. Qualified individuals will calTY out visual surveys and transects on site. Monitoring will occur until COGCC requirements of 80% desired vegetation has been reached. TR 41-35-597 Communications Tower Reclamation Plan Page 4 June 20 II ) ) References .UI.'I I ",l'a~ms . ~ Colorado Oil and Gas Conservation Commission (COGCC). 2008. Rule 1000 series U.S. Geological Survey (USGS), variously dated, National field manual for the collection of water-quality data: U.S. Geological Survey Techniques of Water-Resources Investi gations, book 9, chaps. A I-A9, available online at: http ://pubs. water.usgs. gov/twri9A . TR 41-35-597 Communications Tower Reclamation Plan Page 5 June 20 I I APPENDIX A MAP OF LOCATION TR 41-35 597 Proposed Communication Tower Legend _ II'''' P\.SS r ..... portMIon F •• ,u" .. 0 T....., ... ~ --Wi"lam. Rooocl CJ Sedo.. 0""---.......... I$l' ... m -· · · _""~~ __ s_ =- TR 41-35 597 Proposed Communication Tower Legend """'PIM! PlSS TronSp<NUUon F_! ~ ... C Townsn,P __ w, ... .,._ D s..c. .... 125 250 500 Feet Do><_ --"",,,,,,, .. I SIm.m -' or 1nI ... ""n...wEPllernernl Stream = ~ M~es 0.0625 0.1 25 w+" s HRL. COMPlIANCE .5Ot CnrONS. INC. APPENDIXB APPROVED SEED MIX M od 'I liI ed M'I xe d M ountam. Sh ru bl an d, 'm e Iu d 'm l( 0 a kb rus h ) Species Scientific Names Variety Planting Rate (pis #'s/acre) Mounlain brome Brotnlls marginallls Bromar 2 Thickspike wheatgrass EiYIIIIlS lanceolallls ssp. Lanceolallls, Critana, 3.4 Agropyron dasyslachYlI1II Schwendimar Bluebunch Wheatgrass Pselldoroegneria spicala, Agropyron Secar, P-7, 3.7 spicatum Anatone Canby Bluegrass Poafendleriana Can bar 0.6 Western wheatgrass Pascopyrum smilhii Rosana 3 Slender Wheatgrass £IYIIIIIS lrachycallills, Agropyron San Luis 3.3 trachy caulum Green needlegrass Nassel/a viridllia Lodorm 2 Indian Ricegrass Achnalherulll [Olyzopsis] Nezpar, 1.9 hymenoides Paloma, Rimrock Junegrass Loeleria macron/ha, K. cristala 0.1 Orchardgrass Daclylis glolllerala Paiute 2 Quickguard sterile Triticum aeslivum, Triticum cel'rale 3 tl"iticale Total 20 , 4 COGCC Operator ~mber Un~Name NENE Sec _35_,,", 97W MendlMl ..."-.P !:!1" _ N39574398 NAD33 W108 240660 NAD 83 -Foo!ageAtSulface 11098' ~ ~..-/Field Name :c::-___ -::::::::--'G,,""'!!!!.v,,""~:_::_c :----FIeId NlIII1ber Ground Elevabon 8703' /13 County m Dwecbonal 0 Hoozonla1 (hl!lhlydevlated), submltdnllteddrllilng plan Bollomhole Sec Twp Rng FNJI'St FEl.fWI. /' fNLfSl _ !I~o!~p_ro:~n~ .... _ !~r_ _'-.. ~. . _1_ .. ~~. . _1: _~ ~~~_H~_ _ .. ~7~ _"C _~ ............ __ ........ .. Is klcabon In 8 hl9hdensFly 8/9a (Ru~ 603b)? 0 Yea: DIStance toll1e nearest bUlldng, If 28,29 or3O are "YH" a ptl permit may be required Backfilling F-·~~~§~~~~~~~~~~~~~~;;306CONSULTAnON I SHALL BE RETURNED UNAPPROVED 'he .", .. bI.l",' G~'mm,"' """'''1''. ood ,II "".m." m",,,.,, """ .~. ~",-__________ 'Pnnt Name DIrector of COGCC Oal& t; ~ ] a (~oJ"S I I II II Rules and applicable orders and IS lIerezb a.pproved r ---u;;;;;;=:----,P.""" N,mb", 4}!ln 8J 5 59 E"",,",n Dol. <; I ;p" ! ;Hi'''' API NUM8ER CONDITlONiliF'iPfRao • IrANV ~ t-05-0<./~ -/5" <;/-= SEE ATTACHED PAGES CONDITJONS OF APPROVAL AND NOTICE TO OPERA TORS FORM 2 Rliv 12105 Well O,l.nd G• • c:~~:i~.1 =1,I.. I~II! ~_.m.I=._ .I.I I~~1\ 1120l.I:1o:MS~eI,Sllle601, CoIora:!o80203F'1'iOni FOR WELL NENE SO< _35_ T .. 55 "'g N39574436 NAD 83 longlludl! .iiJtst Reftlng Sidetrack B Foo!ag:~ AI Surfaos 1'1184' §l) I"u' Rea.dll'g II) DredJOnal 0 Honzontal (highly del'lated), submll: dl'lIIteddnlllng plan BotIomho!e SI!c Twp Rng flU'Sl fElJFWL /f~I-'Sl ___________ ~er;: __ 1 __ ~ _ 1 ___ ~ _ _ :r.: _ ~~~H~~ 1_ ~~~_ J __ ~ ____ ~' __ r.: __ _ Is iocaoon In a high denSIty araa (RlIIe603bP ~starlOOto Dyes X No be used dunng drmg? Yes 0$5,000 Sod .. B,,,,,, IS locale<! (~ch separate slleetlmap If you prefer) Ifyes,attadlc:onll~.' 903r Yes Dmo No' 1f 28, 29 or 30 are "Y"~ I pll penni( may bll1qulred """"IF""", I , 0""' [!] Annular PrevenlOr m Doubkl Ram D RO\a1Ing Head 0 None , , 306 CONSULTATION SHALL BE RETURNEe UNAPPROVED been sent to !he eppllcable local Govemment Oe$I\lI1(10(S), and all statements mad. In ltva form 8re, 1, and complete 11rof COGCC [:=--"::"--;:;;iNuiiiiR---t"""'t N;~~!@~M~~~g;]it)!!ii' c: API NUMBER Expiration Date ~-/>'l~O -00 SEE A ITACHED PAGES CONDITIONS OF APPROVAL AND NOTICE TO OPERATORS NENE Sec -LTwp N39574474 NAD 83 Footage AI Sur1ace 11071' f@Fl!IldNema Ground Elevation 4 COGCCOperalorNumber ;S 'ng longrtude County Refflmg Sidetrack B 6lhPM m Orrec!lonal 0 HOfIlIJnlal{lll!lhfydma ledJ, .ubmrtdevldeddnU(ng plan Boltom/Tols Sec Twp R'V fHt..fSL 1'ElKM. .,.. FNASl -----------I --94-3' --I--I-1E-hl--I---"-,.---l'--I-ill-lA-l "-"H-om-H-o.--I --"-" --1--I!-ill-I -----.-------m Annular Prever.kl{ I API NUMBER 05· 01.(" -1>9 '-i '(, -00 v" lease' mNo D$2,COOSU!faceBond D$5,OQOSUriaceBond ~ IS b::a!ed (atlaeh separate sheetlmap If yeo prefer) DNo f(28, 29 or 30 are 'Yet-a pIC permit may be required SEE A IT ACHED PAGES CONDITIONS OF APPROVAL AND NOTICE TO OPERATORS FORM Stat. of Colorado 2 11&112105 011 and Gas Consorvabon Commllaton 1120lnoolnStree~ SUII, 001,~, CoIDlatlo 00203 P1tA"Io9 (303)894·2100 Fax(303}894-:l109 FOR TO 4 COOCC Operator Number City Denver ~Zlp 8OZOZ (;(Inlact Name Tracy Opp Phone 303.soo-4357 Wei Name Chevron w., 8 Fa> I!I Dl1'eciIonal 0 Honzontal~hly (jeweled), lubrNI dtYlltid dnlllng plan BotlOmhole Sec Twp Rr., • MAR p f~L.fSL FB.ofWL '" F~51 ____________ 3IJ;' _ -' __ ~ ___ ~'~_ r _~~~~:~J __ 3IJ;' J __ ~ ____ ~~' ______ _ I$lOCabon 11 a high density area (Ruls 603b)? 0 Yes C15tanoelo \h& nearest bUilding, ,above ground ClStance !O NeQresf l"",. SwelyIDII~ _____ _ 015,000 Su_ "'" $9parate sheetfmap d ~ prefer) m Ho D Ho If 28, 29 or30 are-VH-' prlpennrtmay be required m Annular Preventor r~~~~~~~~~~~~~~~~~~~RULE has been sent to the applICalbOleB L CoOcaNl SGUoLvTerAnTmIOenNt DBeHSAlgLnLe BeE(s }R, aEnTdU aRlNl sEtDat eUmNeAnPtsP mRaOdVeE IDn thiS form are, complete COGCC Rules DI~" of cooce r:~~~~~':-:-"'''"''tN£;!llii~~~Yi~!;:5lli6~= E,,,,,,,,,,, Date '1'i-06 SEE ATTACHED PAGES CONDITIONS OF APPROVAL AND NOTICE TO OPERATORS \ R"l Stat. of Colorado .. = ~~~N~""~J~~o""iI;a\n~dG: ea.~con~~~;;~::.:.:~;:.~~~;!~ III~I~•~ .I' II r,-Refillng E3 UnrtName ( Labtude NENE Sec _"_Tw'_---'5"-S __ R"9 N39574550 NAO 83 longllude Sidetrack 97W MerIdian 6Ih P M Wl08 240600 tw) 83 /' ~ ____ ~-~~~-----_F~N~r m DlretOOoal 0 Honzontal (h~h!y devtated), lubmltdlVllteddnlllllg plIn SoIIomhola Sec Twp RIg 30(0 Co~el8tro1 Al\llcI1rM1'l ChiICkl15\ flUs(' ,. fElGitL "' fN(.IFSl __________ ~ __ "''! _ -'--~ _ , __ ~~~ _ ~ __ ~~~H~ ___ !'! _ J __ ~ n _________ _ Is IocaIlOn III a !ugh density area (RuIe603b)? 0 Y8$ DIStance IOthe neares! bUlldlflg. P'Jbllcroad, ~ IIIW~l PmlM) Dl$\artee to Nearest I'ropeItj Lne 11 Quesllons 27 MuddlSPOSBl ...,,'" BOP EqulPIllent Type Con"",. API NUMBER 05· 0" f-IS" S.l-cb r om NNoo If 21, 2SI or 30 ,rt "Y• ••• pltpef1'lVtmaybe reqUired WITH RULE 306 CONSULTATION SHAlL Be RETURNI!D UNAPPROVED sent to the applicable Local Government Destgnee(s), and all statements made III thiS fonn are, Expiration Dale SEE AlTACHED PAGES CONDITIONS OF APPROY AL AND NOTICE TO OPERATORS ; r-::-:-:::------------=-=~::-:----.. GlD B.C. R 97 W. 19l!3 GLD B.c. • • S 88'13'12' £ 2633J5' 19l!3 IiUl B.C. 1923 C.C.D. 13 U.P.L. I I I I I I I I I I I I I S aa'IB'3~' I: ~Oo09' 1288' 2008' C,C.D. I' U.P.L. SCALE I' ~ 1000' T. 5 S. ~~-----------35--------1~23 ----LATITUDE (NAD 21) NORTH 39.574459 DEG. LONGITUDE (NAD 21) WEST 10B.240021 DEG. LATITUDE (NAD 88) NORTH 39574436 DEG LONGITUDE (NAD 83) WEST 108.240660 DEC. '" C.C.D. ,4 U.P.t.. BHt I I I I I I I I I I I I I C,C.D. 12 U.P.l. NORTHING 645759.54 EASTING 122772381 Oft, -1'(11 M~Bff." N 89-31'42" 'wi CI8$EIMII A POOP J.. 5~9.36' CALC GlO B.C. -.,.,N. .8"8.'1=3''2-8' -\I 4~812.~61' -AI.L CPS 08$E1lVA1IONS ARE IN CClMPUNlC!: \filTH COGCC RUiIt NO 2.5-1923 Balla of DewJf:lon uses spot iII.v located en Ule SW' Quartet Sec. 35. TSS,R91W 1000 SOD IiLD B.C. 1923 o 1000 2000 CHEVRON TR 32-35-597 UNGRADED ELEVATION. 8702.0' EI .... UOO. ~2· --SllRl'EYOR(f STATEMENT ~IGIi PU lEAU OE51:RT £1aSllNG YEu. IIlTHIN 200' RADIUS OF Yl£LL SITE. stE ElCHIBIT 2 fOR DEToliL. SURfACE USE IS NAlilot: PASTURE --SCALE FEET I, CLEMENT R lllLUAMS, OF ROCK SPRINGS. WYOMING, HEREBY STATE: THIS MAP WAS MADE FROM NOTES TAKEN DURING AN ACTUAL AELO SURVEY DONE UNDER MY DIRECT SUPERII1SION ON AUGUST AND 1I1AT THIS PLAT CORRECn Y SHOWS THE LOCA nON OF CHE'<RON TR 32-35-597 AS STAKED NOTES • WELL LOCATION • FOUND MONUMENT L DENOTES 90' 11E o CALCULATED CORNER ~RIFFIN & ASSOCIATES,INC. /311" ....... ~~"1" ELK ST., ROCK BPR/NQ8, WYB2JJfJ1 REV18ED: fUA EXHIBIT1 PLdTOF DllIUlNG LOCATION FOB JV.lLl.JAMS PRODUCl'lON .BMT COMPAM 1084' F!N£ .t1188' F/EL, &HC1JON 35, T. 5 s., R.'7 W .. 6tIJ P.K GtllFIE£D COUNTY, COWRADO 1 ) ) ) OLD B,C. 1923 S 88' 13'12' E 2633JS' C.C.D. 13 U.P.L. GLIl B,C. 1923 I I I I I I I I I I I!'I~'~JIII III 7 w.: .. -._-IiLD BC S 88'18'34' E 2650.0'}' 1923 C.C.D. " U.P.L 1294' : ~ _______ 1~9~99~' ______ ~~ I ~Ia III GLOB£ ----------_35_E-t228"7 ; ~n -----------I S SCALE \' = \000' T. 5 S. LATITUDE (NAD 27) NORTH 39.574421 DEG. LONGITUDE (NAD 27) WEST 108240041 DEG. ~ I 8 I I .. LA TlTUDE (NAD 8S) NORTH 39,574-398 OEG LONGITUDE (NAD 8S) WEST 108.240680 DEG. ;;: NORTHING OJ :> "' II") I'"" a '" C.C.O. ,4 U.P.L. N 89'31'42' 'IJ 349.36' CALC GLD j,C. 1923 CHEVRON TR 432-35-597 I I I I I I I I C.C.D. 12 II.P.L. -~""I ----;:;-:,.,.,-_ N 88'13'28' 'oJ 4812.61' 841111 of EJovctlorl uses spot eft\" foeoted 11\ the SW Quort.er S",,35,T5S,R97W E1evaUon • 8342.' 1000 500 645745.83 EAST1NG 1227717.71 BASIS OF BEARINGIDATUM SPCS CO CENTRAL NAD 27 BASED ON NGS TRIANGULA nON STAll0N 'SHALE" QPS OPDtATOA HARK SESSIf' CIISIlI'IEIl A POOP Of :I.,. m CI'5 08S[RVA Tlot<S AA£ IN COWI'UAHCf: .,," OOGCC RUlL NO. 215. GLD B,C. 1923 --o-10-00 2000 UNGRADED ELEVATION: ~n~~~ =::\00' RADIUS Of SCALE FEET 6702 6' WIl.l SITE. Sf:t F»iJelT 2 FQR DUM.. SURFACE USE IS NAIM: PASTURE SURVEYOR'S STATEMENT I, CLEMENT R WlWAMS, OF ROCK SPRINGS, WYOMING, HEREBY STATE: THIS MAP WAS MADE FROM NOTES TAKEN OURING AN ACTUAL FIELD SURVEY DONE UNDER MY DIRECT SUPER>1S10N ON AUGUST 8, 2007. AND THAT THIS PLAT CORRECTLY SHOWS THE LOCAnON OF CHEVRON TR 432-35-597 AS STAKED ON THE Nons • WELL LOCATION • FOUND MONUMENT L DENOTES 90' TIE o CALCULATED CORNER 'RIF'FIN & ASSOCIA TES, INC, ROCK SPRINGS, WY_' PlAT OF DIlILLl1VG LOOt170N FOR WIUJAMS PRODVCl'lON RMT COMPANY """.' , .. mrL .. r ~ .. "'.·F/EL, To 5 &, R. 97 W., 6tb PM. GARFrEIJ) COlJN7'l', COWIIADO r I G~O D.c, 19f_~ _____! 8~S'1~3'1~2' ll26~33J~5' ___G ~L1~9O2tD3~ 'C_' __-i~~~~~~~ _ ~G21~~B ~~ r _ ~~~~~~~ S 88'18'34' E: 2650m' ~. C.C.D. 13 U,P.~. I I I I I I I I I I I I I C.C.D. I' U.P.L. I 5' 1282' SCALE I' " 1000' T. 5 S. LA TlTUDE (NAD 27) r-IORlH 39.574497 DEO. -------35 GLO B,C. ----------___ _ 1923 ----I LA TlTUDE (HAD 83) r-IORlH 39.574474 DEO. LONOmJDE (NAD 88) WEST 108.240640 DEG ~ )0 ~ s .. C,C.D. ,4 U.P.L N 89'31'42' .., 549,36' CALC GLD B.c. 1923 CHEVRON TR 31-35-597 UNGRADED ELEVATION: 6702.5' BHL SURVEYOR'S STATEMENT N eO'13'es' V 4012.61' Balla of EJe'l'Otion USGS spot tfoy IOfttl:d en the SW Quarter Sec.J5,TS5,R87W ElewUon • 8342' C.C.D. 12 U.P.L. 1000 500 NORTHING 645773.24 EAST/NO 122172991 CPS OPERATOR ym flESS'E _ A PDOP 01' 3.7 AI.I. _ OBSOYA_ ARE IN COMPUA/ICE WITH COOCC RULE NO. 2.5-GLD B,c, 1923 --o-10-00 2000 HlGH PlA 1EAU DESERT ElCI5nNO v.tLI. \\lIMN 200' RADIUS OF \I£U. sm:. SEE EICH1B1T 2 FOft mAIL. SURFACE USE IS NA n'IE PASTURE SCALE FEET I, ClEMEr-IT R. WlUIAMS, OF ROCK SPRINGS. WYOMING, HEREBY STATE. lHlS MAP WAS IMIDE FROM NOlES TAKEN DURING AN ACTlJA~ F'lELD SURVEY DONE UNDER MY DIRECT SUPERII1SION ON AUGUST I ~~~~~~A:NID~D THAT mls P~T CORRECTlY SHOWS THE ~OCAnON OF CHEVRON TR 31-35-597 AS STAKED ON.~ NOTES • WELL LOCA liON • FOUND MONUMENT L DENOTES 90' TIE o CALCULATED CORNER ASSOCIATES, INC. ROCKSPRINGS, 1W8I9t11 FOR WlUIAMSPRODllCTlON RMTCOMPAN. ) C.C.D. 13 U.P.L. I I I I I I I I I I I I I C.C.D. 11 U.P.L ~ .=.>. SCALE c 1000' T. 5 S. LATITUDE(NAD2~ NORTH 39.!l74S35 D G. -------------35 J ----_______ _ LATITUDE (HAD 88) NORTH 39.574512 DEG. LONOITIJDE (NADU) WEST 108.240620 DEG. C.C.D. '4 U.P.L. I I I I I I I I I I I I I C.C.D. 12 U.P.L ----'0=' --""'~_ N 88'13'28' 'oJ 48ll!.61' NORTHING 645786.95 BASIS OF BEARINOIDATUM SPCS CO CENlRAL NAD 27 BASED ON NGS lRIANC!JLAll0N STAllON "SHALE CPS OP£RATDR HP ft"5Sf' OBSERWD A POOP Of' 3.4. AU. CPS CBSERYATIOHS ME IN COIRIAHCE \II1lI ODOCC RW: NO. 21'" CHEVRON TR 331-35-597 .. '" of 1I ... lfon: uses .poI erev. tocatld h ttl. sw Qucrt_ 1S1o _c. 3_5, T-S83S4,2R' .7W 1000 500 o 1000 2000 ELEVATION: ~= ~~2DD' RADNS cw 8700.5' 'Ml.L SI1[. sa DCHIBlT 2 FOIl DETAIL SURfACE USE IS NAlIVE PASTURE SllRJ'EJ'ORW SIATEMENl' ----SCALE FEET I. CLEMENT R. MWAUS. OF ROCK SPRINGS. WYOMING. HEREBY STATE: THIS MAP WAS MADE FROM NOTES TAKEN DURING AN ACTUAL FlELD SURVEY DONE UNDER MY DIRECT SUPERVISION ON JULY 24. 2008. AND THAT THIS PLAT CORRECTLY SHOWS THE LOCA110N OF CHEVIRON TR 331-35-597. NOTE8 • WELL LOCATION • FOUND MONUMENT L DENOlES 90' TIE o CALCULATED CORNER n4:!RIFFIN & ASSOCIATES, INC, ~~4'4aKST.,_8PRJNQ8, WY_, FOR lHUlAMS PRODUCIlON RM'I' COMPAM' To 5 So, & 91 W., 6tb PM. ( -----;;;1!I;-;;-o;T.llf=oIlJ~k='1I"I. .-----,' . .... -REG ------------26-----.------C.C.D. ,a U.P.L. 8HL I , I I I I I I I I II c.C.D·I L,7 I U.P.~------I SCALE I' = 1000' T. 5 S. I I ~mt1 LATITUDE (NAD 27) I -1 7 NORTH 39.574574 DEC. I LONGnvDE(NAD2n tGLD~~U!~~.Ll~!..!a:-;;;-;;-;;;7~-..!Iu!l!:!.!!1.i:.&~~~--lGI;~.J~dWEST 108.239960 DEC. '"1~2tC. GLD B.C. LATITUDE (NAD 88) 1923 I NORTH 39.574550 DEG. C.C.D. ,3 U.P.L I I I I I I I I I I I I C.C.D. '1 U.P.1.. NORTHING 645800.65 EASTING 1227742.10 BASIS OF BEARINGIDA TUM SPCS CO CENTRAL NAD 27 BASED ON NGS TRIANGULA nON STATION "SHALE" -~-----------35----------__ CPS OPERATDRrSRK BD'f 0BSEIMlI A P OF "'7. ALL j)IIS OBSOIVA1IONS ARt IN COIIPlJAHct WIlli COGCC ROI..E NO 21S. CHEVRON TR 434-26-597 Sa. of DovaUon USGS CIIIot olav 1_"" In Il1o $VI Quertor sec JS.TSS,R97W eMUon = 8.342" UNGRADED ELEVATION: HICH PLATEAU DESERT 8702 5' ElOS1ING WEll. W1l1ilN 200' RAIIIUS OF • \\IlL SItE. SO! EXHIBIT 2 FIlII DETAIL. SURfAC< uS!; IS NAlI'IE PASM! SlIRJIEJ'ORlS'STATEMENT 100-0 50-0 o-100-0 2000 SCALE FEET I. CL.EMENT R. WlLUAMS, OF ROCK SPRINGS, WYOMING, HEREBY STATE: 'THIS MAP WAS MADE FROM NOTES TAKEN DURING AN ACTUAL FJELD SURVEY DONE UNDER MY DIRECT SUPERVISION ON AUGUST 8. 2007, AND THAT 'THIS PLAT CORRECTLY SHOWS THE LOCAllON OF CHEVRON TR 434-26-597 AS STAKED ON THE GROUND NOTES • 'N£LL LOCATION • FOUND MONUMENT L DENOTES 90' TIE o CALCULATED CORNER ~llIFF.'N & ASSOCIATES, INC. ROCK 8M/NfJS, 1W8MH , FOB WlUJAMSPBODUcnONBMTC OMPANJ nc PROD'" ON RMT COMPANY CHEVRON TR 31-,31-,331-,431-,434-35-597 ~RIFFIN & ASSOCIATES, INC. ESTIMATED EARTHWORK ITEM CUT FILL TOPSOIL fXCESS 1414ELKST,SUITE202 SCALE I w·80' PAD 2280CY 7169CY NIA -4889CY ROCK SPRINGS, WY 82901I-----;:;;:J:;-:O;;::B;;:N,:::O.:-:1;;:43:;;:2;;;1:;;-_~P/~T=_=_+356~~3.;::C:i,Y_j,=""'v__h;;,.__-_tS=;5B3;i;;;~CivY,..-j (307)382-5028 REVISED:SI261OB TOTALS 6843CY 71B9CY NlA .1328CY I I I I I I I I I I I I I I I I , I I I I I , I I I i I I I \ ,I I I I I I , I I I I I I I I I I I I I I I I I I , I I I I I , I I I I I I I II I I \ I I \ \ \ I I \ I \ \ I I \ \ , I I \ I I \ , 1 I I I , I I I II I\ f\ I I J \ I J I I H f4f4ElJ( Sr., SUITE 202 I--~~;~;;;~-~~==t~ ROCK SPRINGS, WY 82901 (307) 982-6028 Exhibit C-3 J:l(7 RIFFIN & ASSOCIATES, INC. 1414 ELK ST., SUITE 202 ROCK SPRINGS, WY 82901 (307) 362·5028 PROPOSED ROAD FOR WILLIAMS PRODUC170N RMT COMPAIVY CHEVRON TR 31-,32-,331-,432-,434-35-597 EXHIBIT 4 Exh ibit C-4 r-:a.c. RIFFIN & ASSOCIATES, INC, ~ ~414 ELK ST., ROCK SPRINGS, WY 82901 ) WILLIAMS PRODUCTION RMT COMPANY CHEVRON TR 31 PROPOSED GAS LINE _ •• -• ---PROPOSED WATERLINE -I I _ , I _ I I _ , I _ ~ ~, ~ :~ ) I C, D'rJ:lIS BOND REPLACE:';-AND SUPER SlIDES UNITIID STATES F ,~. BOND 6101757333 EFFECTlVE MAY 22. 2006. , 3 State of Colorado .. Oil and Gas Conservation Commission •• 1 l~P Un",1n SlIeol. Sull. ~Dl, 0.."" ,,,,,11/0 8D203.1LD;!l§M1!DO En 13031894,2109 PERFORMANCE BOND BOND NO: K04991291 • This borld is a perpet\lat Instrument which shall remain in force and effect unUi all obligation' have been met and Ihe bond i. relgesed by me COloradO Oil and Ga. CorisetVation Commission. INSURANCE COMPANY '011 06ce U3( OHL'1 surety provider No: ()GCC Ow, No: FATS N&: KNOW ALL PERSONS BY THESE PRESENTS That wa Williams Production RMT COmpany 01 The County of Jefferson :lntheS~tBOf Colorado asp"nclpals, arld Westchester Fire Insurance Comgany , es lurety, authorized to do business In The Siale of COlorado, ar. hold hereby and firmly bound unlo the Stale of Colorado, in the penal,um of ($ 25.000.00---------------), Twenty Five Thousand and No/lOO-DoII.,s, lawful money of the United state., lor the fAlthlul PIIyment of which we hereby bind oUnlelves, our heim, execulon;, admlnl,tr.lor. and assigns. The condillon Of This obWgaflon Is mat w~ereO$ the above bounden principals pnopose the following oil and g~$ operation(s) on lands situated In the State 01 Colorado Type of Bond Coverage ' Location 0 [!iii Blanket CompleJo tor Individual Bonds Plugging WoIl N ..... nd Numl>tr. ~ Surf""o o Indivlduel Ow"., II! tendo wh ... ___ focIIlIy It IOcoIO<t. 0 Seismic o Plulllling 1 wen o Surfaoe for 1 well QIrQIr, _. TWp, ling, _Ion: 0 eAP Weste Fadlly Olnigated o Non-Inigaled 0 Dclwnstream Gaa o FlcllIlle, Ex.,..." Inaetlve Wells c""""': NOW. lliEREFORE, If the above bounden prlncipal~ ehall comply with all ... 1 the PfCWlslonS 01 the Jaws of the State of CoIo..-do Ind tho ",lea, regulation. end requirements 01 the Oil and Gas Conservation Comrrisslon of !he Slate Of ColOrado, with reference to property plugging of said well or ~II.; with ,eferen~ to !arld damagll and the restoration Of The larld, as nUrIy a. possible, to lis condition al the beginning of the lease; wHh reference to seismic operations the proper surface restorotion and plugging 01 any shot holes, then this obllgaHon Is void; otheJWise. Ihe same shan be and remain In M torce and effect Wlllle8S ou,hand., this22nd dayll ::..tLt; 2006 Principal: W ams Pro uct on ompany Signed: cr"&Yl0L . ~«:6 Address: One Williams Center MD 48-6 Name Prinlod: Leno re DuBddo City; t~ls, State' PI( Zip: 7~m Phon.: 9 -5 3-8091 Fax: 918-573-Wlllleos our hands, this 22nd day of ~2006t ' Surety: Westchester Fire Insurance Company $igned~~\~~s::.~ Addres.:~36 Walnut Strut POBox 1000 NameP~"ted: Melissa Haddick. Attorney-in-fact City: PhiIadelj)fiia Stete: PA Zip: 19106 Phone: 215-64U=~S69 Fax;ITS-640-s474 D.Ied; _______________ _ Bond Refuse Approved: bliiaOJ, 6i1 .&1 d" con,.rwtlOn COtnnliulOn 1101 .... 0.10: _________ ~ ___ _ 1j the undersigned Sccre;:tary ofWto;.sTCHESTER FIRE INSURA~C£ COMPANY I co hereby certify that the;: origiTlal POWER OF A·IJ9~,!?YI:,OfW~~(~~}~,~ fQ~~~,Q~n~!~",:~_:s,~bslanti~IJ~~:~,f'_"O\nd C,~~t.copy!.:~_(~~tf~1!l!?rce _~r~:,~ff~t., ;::' :7','i-YJ::::',,', " '_':::': ,',:: ':: '~ " . ~ .;,::' -:: ~:~~~es~,~~~t, t~~~: b~~~t(J'subscriS:; ~nQ~6'~~ S&:re~:~~d"~m;~ ih~S;~~;;;~t~~'~aJ.tlith~ Cbrporaii~, t~i~22rid ' diyo~ ) ,,'" ~:, )\t.::" ,;~,_\ '-i.:)M~Y H th: !Q.Q~~ Tf, ;i:~' =i.-A h) {~[t rrijf ,~ir;'~':":~::} "':/1 ~'~\ '/:.> <l ':%1-. ·'l/:. !!:V /::'_ ~3" • . '4·:" ':( ',\~" ··'1. ::::~ \!\.' :'::~ =i::·f ~,f:'.: ;tl~;~," ','<'"i ,,'>i~::'., "~f)}JiM~:~"' <~N~~i' .... ,.,'., ..... ' ". ' , .. ".. ............... ,.'. "'"., . "..., """'., "• ....•, .• ' ... GCQ~FU":~,"~:~re .. '>:,,,,"'<,;<.;, •• e" ,:~His;O(."ER'b~:,\Tro;u.;~y M"; ~O;:,~E 0SE6:TO'.fxEQUW A~$~\lND \>ih;C~N IN,CErtIOl!,M;rE;AD'E"R, N~~'ni;''' ~\;~7 .• 'i>: ,':-; ';;'.: t,~ .:,i", ':W:: . lil~~"",,~. "'".~,~~ .. ,_ it: ·-.-{:,?,,~t ;,~:\. . ;','.:,.,;.i;.i', ,.:.' . y-r <"-' ~~:~::::'. .",\ ', .. ;':'" LIMITED POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that Williams Production RMT Company, a Delaware corporation, having its principal place of business at One Williams Center, Tulsa, Oklahoma, hereinafter referred to as the "Company", does hereby make, constitute and appoint DA VII) ENSMINGER, LENORE DUBALDO, SHARON QUIMBY and BEVERLY UlTER, with the full authority hereinafter provided, the true and lawful "Attomeys-in-Fact" of the Company, authorized and empowered on behalf of the Company and in the Company's name, and for the sale and exclusive benefit of the Company and not on behalf of any other person, corporation or association, in whole or in part, to commit the Company under all surety bonds which are USed in the ordinary course of business by the Company, giving and granting, individually, unto said Attomeys-in-Fact fuJI and complete power and authority to bind the Company as fully and to the same extent as if Signed by the duly authorized officers of the Company; and all the facts of said Attorneys-in-Fact, pursuant to the authority hereby given, are hereby ratified and confirmed, with the qualification that said authority to act shall terminate on December 31,2006 and shall be expressly limited for the purpose as herein stated, IN WITNESS WHEREOF, Williams Production RMT Company hus causcdits name to be subscribed and its corporate seal to be affixed this eola, day of mA., ,20~. S Attest: Williams Production RMT Company By:C&94£ Rl\lpt;,Hill Chairman of the Board CERTIFlCAT.E I, the undersigned, Corporate Secretary of Williams Production RMT Company, do hereby certify that the original Power of Attorney of which the foregoing is a full, true and correct copy is in full force and effect on the date of this Certificate, and the Chaitman of the Board who executed the said Limited power of Attomey was and is a duly elected officer of Williams Production RMT Company. IN WITNESS WHEREOF, I have hereunto set my hand and affixed the Corporate Seal of Williams Production RMT Company to these presents this 4rl day of !'t\", .. , 20--O..k. .l [SEAL] ~ Boan K. Shore '"'---' Secretary