Loading...
HomeMy WebLinkAbout5.9.1 Oxy Roadway Standard Rev 12615GARFIELD COUNTY ROADWAY STANDARDS ASSESSMENT PREPARED FOR OXY USA WTP LP Grand Junction, Colorado PREPARED BY Olsson Associates 760 Horizon Drive, Suite 102 Grand Junction, CO 81506 970-263-7800 January 2015 Olsson Associates Project No. 013-0655 O\OLSSON ® ASSOCIATES Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 Table of Contents 1.0 CASCADE CREEK VALLEY ROAD 1 1.1 Scope 1 1.2 Valley Road 1 1.3 Average Daily Traffic Numbers 1 1.4 Road Description and Comparison 1 1.5 Valley Road Best Management Practices 2 1.6 Valley Road Assessment Conclusion 3 1.7 Valley Road General Approval Standards Narrative (Article Division 107) 3 2.0 CASCADE CREEK MOUNTAIN ROAD 9 2.1 Scope 9 2.2 Mountain Road 9 2.3 Average Daily Traffic Numbers 9 2.4 Road Description and Comparison 9 2.5 Mountain Road Best Management Practices 10 2.6 Mountain Road Best Assessment Conclusion 11 2.7 Mountain Road — General Approval Standards Narrative (Article 7 Division 107) 11 3.0 CASCADE CREEK MESA ROAD 17 3.1 Scope 17 3.2 Mesa Road 17 3.3 Average Daily Traffic Numbers 17 3.4 Road Description and Comparison 17 3.5 Mountain Road Best Management Practices 18 3.6 Mountain Road Best Assessment Conclusion 19 3.7 Access Roads — Genera; Approval Standards Narrative (Article 7 Division 107) 19 List of Tables Table 1. Table 7-107: Roadway Standards — Valley Road 2 Table 2. Table 7-107: of the LUDC for Rural Access Roads — Valley Road 10 Table 3. Table 7-107 of the LUDC for Rural Access Roads — Mountain Road 10 Table 4. Table 7-107 Roadway Standards — Mountain Road 13 Table 5. Table 7-107 of the LUDC for Rural Acccess Roads — Mesa Road 18 Table 6. Table 7-107 Roadway Standards — Mesa Road 21 January 2015 C._OLSSON ASSOCIATES Oxy USA WTP LP List of Figures Figure 1 Figure 2 Figure 3 Figure 4 Garfield County Roadway Standards Assessment 013-0655 Overview Map for Garfield County Road Standards Assessment Valley Section for Garfield County Road Standards Assessment Mountain Section for Garfield County Road Standards Assessment Mesa Section for Garfield County Road Standards Assessment January 2015 04%, OLSSON ASSOCIATES Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 1.0 CASCADE CREEK VALLEY ROAD 1.1 Scope According to the Garfield County Land Use and Development Code (LUDC) Section 7-107 — Access and Roadways, all roads are required to be designed to provide "adequate and safe access" and reviewed by the designated County Engineer. The Cascade Creek Valley Road Assessment documents summarize the engineering controls and construction specifications associated with Oxy's Cascade Creek Operating Area Valley Road which begins at the terminus of County Road 213 and extends to Oxy's switchback 1 along the Lower Valley Floor Zone. See attached Figure 1 — Overview Map. 1.2 Valley Road Oxy's Valley Road is a private access road existing on Oxy property to serve Oil and Gas Exploration and Production (E&P) activities. See attached Figure 2 — Valley Road. The Valley Road begins at the terminus of County Road 213 in the NE 1/4 of Section 8, Township 7 South, Range 97 West of the 6th PM and terminates approximately 16,051 feet (3.04 miles) north at Oxy's switchback 1 located in the SW 14 of Section 21, Township 6 South, Range 97 West of the 6th PM. This roadway follows the Conn Creek drainage, gaining approximately 450 feet in elevation, and ends at a point near the confluence with the Cascade Creek drainage. The Valley Road services approximately 24 well pads and four (4) Facilities (two Compressor Stations, a Central Water Handling Facility, and one Field Office) located in the Lower Valley Floor Zone of Oxy's Cascade Creek Operational Area. The Valley Road is used to access Oxy's Mesa Operational area as well. The Valley Road is typical of roads providing access to natural gas production facilities, compressor stations, and Centralized E & P Facilities in Garfield County, Colorado. 1.3 Average Daily Traffic Number Oxy collected traffic numbers accessing Oxy's Cascade Creek field between July 2011 and June 2012. Oxy documented traffic numbers at the Lower Guard Shack, located at the terminus of County Road 213, and at the Upper Guard Shack, located above Mountain Road switchback 6. See Figure 1 for guard shack locations. Oxy's traffic count found an average of 148 vehicles travel the Valley Road each day. 1.4 Road Description and Comparison Oxy collected average daily traffic numbers accessing their lower guard shack and Oxy property between July 2011 and June 2012. The results of the exercise identified that Oxy had an average of 148 vehicles accessing the Valley roads each day. Based on roadway numbers collected by Oxy, the following table compares Oxy's Valley Road to the Garfield County Roadway Standards found in Table 7-107 of the LUDC for Rural Access Roads (Table 1 below): January 2015 1 C_OLSSON ASSOCIATES Oxy USA WTP LP Garfield County Roadway Standards Assessment 013-0655 Table 1. Table 7-107: Roadway Standards — Valley Road Table 7-107: Roadway Standards Design Standards Design Capacity (ADT) Rural Access Road Valley Road 101-200 148 Minimum ROW Width (Feet) 50 0 Lane Width (Feet) 11 10 — >12 Shoulder Width (Feet) 4,2 min. paved 0 — 6 Ditch Width (Feet) 6 0 — 4 Cross Slope 2% chip/seal, 3% gravel 2% Shoulder Slope 5% <5% Design Speed n/a 25 Minimum Radius (Feet) 80 >80 Maximum % Grade 12% <12%, except two sections Surface Gravel Native Material/Gravel Oxy's Valley Road is located on private property and therefore is not located within a ROW and does not provide access to the general public. One section of the road along the entire Valley Road does not meet the Roadway Standards for lane width. This section has a width of 10.5' per lane. Aside from this short section of road, the rest of the Valley Road meets or exceeds the required 11' lane width. Due to the terrain and proximity to Cascade Creek, shoulders are constructed between 0 and 6 feet wide along portions of the Valley Road. Ditches are constructed throughout the Valley Road to convey water safely under the road through culverts and to dissipate as planned in Oxy's Stormwater Management Plan. Due to the terrain of the Valley Road, majority of the ditches within the field do not comply with the required ditch width. All switchbacks along the Valley Road accommodate a minimum turning radius of 80 feet as established by the roadway standards. Oxy's Valley Road has two roadway sections which do not meet the grade requirements of 12% due to topography in the area. 1. VnIley Road Best ISArmnriPmPr f Prnctie°pc Oxy has implemented the following Best Management Practices (BMPs) to aid in providing adequate and safe access where Oxy's Valley Road does not meet Rural Access Roadway standards. Limit access from public and only allowing authorized personnel to utilize the road Speed limit signs of 20 miles per hour or less. Speed limits are enforced by a private contractor throughout Oxy's Cascade Creek area. Uphill traffic has the right of way. This aids in reducing the amount of congestion along the roadway and allows for more efficient passage during inclement weather or busy times of the day. Oxy conducts 14 day stormwater inspections as well as post -precipitation inspections along the entire Mountain Road. These inspections document Mountain Road and stormwater feature condition and document road maintenance issues needed for repair on a regular basis. Oxy completes regular maintenance of the Valley Road to include grading, snow removal, maintaining stormwater BMPs, and upgrading or improvements to the roadway identified during operation. January 2015 ONOLSSON ASSOCIATES 2 Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 During spring and winter, Oxy requires the use of chains on the Valley Road as a precautionary BMP. Additionally, Oxy maintains a website to allow contractors to monitor current site conditions and road alerts for requiring chains, or closed roads due to weather conditions. During dry periods and windy events, Oxy completes dust suppression using water and chemical suppressant (i.e. magnesium chloride) spreading to ensure safe visibility is not impaired during wind events. Details on dust controls are provided in Oxy's Dust Management Plan, located in the Standards Tab. 1.6 Valley Road Assessment Conclusion Given the on-going construction and maintenance activities completed by DIA Construction, BMP implementation and maintenance completed by DIA Construction and McIntyre Construction, and vehicle traffic volumes, Oxy has provided safe and adequate access to Oxy's employees and contractors utilizing the Valley Road. 1.7 Valley Road General Approval Standards Narrative (Article Pmaem-ion 107) 1.7.1 Introduction The following section addresses the requirements for the General Approval Standards under Article 7, Division 107 of the Garfield County Land Use and Development Code (LUDC). 1.7 ? ASS to Public Right -of -vv ,, All lots and parcels shall have legal and physical access to a public right-of-way. The proposed site has legal access from an existing OXY Lease Road which is accessed by County Road 213. The proposed site will use the existing access that was established when the site location was originally developed. The Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 and 697-16-16 Storage Sites. 1.7.3 Safe Acces Access to and from the use shall be safe and in conformance with applicable County, State, and Federal access regulations. Where the Land Use Change causes warrant(s) for improvements to State or Federal highways or County Roads, the developer shall be responsible for paying for those improvements. The subject access roads were designed to provide safe access to the Cascade Creek Field. The access road has been assessed and certified by a professional engineer as safe and adequate for Rural Access standards. The subject access roads do not warrant improvements to County Roads, State, or Federal Highways. The site is accessed from an existing private access road and does not result in a significant increase to traffic on public roads. All roads located on the subject parcel are maintained by OXY to achieve optimal safety, including speed restrictions, regular road maintenance, and snow maintenance. The subject access road will adhere to Oxy's Fugitive Dust Mitigation Plan. The Dust Mitigation Plan, Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. January 2015 3 C._OLSSON ASSOCIATES Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 Given the on-going construction and maintenance activities completed by DIA Construction, BMP implementation and maintenance completed by DIA Construction and McIntyre Construction, and vehicle traffic volumes, Oxy has provided safe and adequate access to Oxy's employees and contractors utilizing the Valley Road. 1.7.4 Adequate Capacity Access serving the proposed use shall have the capacity to efficiently and safely service the additional traffic generated by the use. The use shall not cause traffic congestion or unsafe traffic conditions, impacts to the County, State, and Federal roadway system shall be mitigated through roadway improvements or impact fees, or both. Vehicles accessing the site will not result in an overall significant increase to current traffic. The proposed site will not cause congestion and unsafe conditions to the County, State, and Federal roadway systems. On average, 7 — 11 vehicles will access the site daily. Details on traffic statistics and recommendations are described in the Traffic Study, included as an attachment to this submittal. The private lease road maintained and owned by Oxy is classified as Rural Access and is certified by a professional engineer as safe and adequate for the rural access roadway standards. The Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. Given the on-going construction and maintenance activities completed by DIA Construction, BMP implementation and maintenance completed by DIA Construction and McIntyre Construction, and vehicle traffic volumes, Oxy has provided safe and adequate access to Oxy's employees and contractors utilizing the Valley Road. 1.7.5 Road Dedications All rights-of-way shall be dedicated to the public and so designated on the Final Plat. They will not, however, be accepted as County roads unless the BOCC specifically designates and accepts them as such. The proposed site is located on private land and is accessed by a private road owned by the applicant. The site will not allow public access. A right-of-way road dedication is not applicable to the site. The Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 1.7.6 Impacts Mitigated Impacts to County roads associated with hauling, truck traffic, and equipment use shall be mitigated through roadway improvements or impact fees, or both. Impacts to County roads are not anticipated. The access road use will not result in an overall significant increase to current traffic. Details on traffic statistics and recommendations are described in the Traffic Study, provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. The site will adhere to Oxy's Fugitive Dust Mitigation plan. The Dust Mitigation Plan, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. January 2015 OLSSON ® ASSOCIATES 4 Oxy USA WTP LP Garfield County Roadway Standards Assessment 013-0655 i .7.7 Design Standard Roadways, surfaces, curbs and gutters, and sidewalks shall be provided as follows to Table 7- 107. The Average Daily Traffic (ADT) for the proposed site is 7 — 11 vehicles. The site was assessed to meet the requirements of the Rural Access standards of Table 7-107 of the Garfield County LUDC. A professional engineer certified the access road to be safe and adequate following the rural access roadway standards (Table 2 below): Table 2. Table 7-107 of the LUDC for Rural Access Roads — Valle Road Table 7-107: Roadway Standards Design Standards Design Capacity (ADT) Rural Access Road Valley Road 101-200 148 Minimum ROW Width (Feet) 50 0 Lane Width (Feet) 11 10 — >12 Shoulder Width (Feet) 4,2 min. paved 0 — 6 Ditch Width (Feet) 6 0 — 4 Cross Slope 2% chip/seal, 3% gravel 2% Shoulder Slope 5% <5% Design Speed n/a 25 Minimum Radius (Feet) 80 >80 Maximum % Grade 12% <12% Surface Gravel Native Material/Gravel The Roadway Standards Figure, Roadway Standards Table 7-107 Map, and Site Plan are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. Given the on-going construction and maintenance activities completed by DIA Construction, BMP implementation and maintenance completed by DIA Construction and McIntyre Construction, and vehicle traffic volumes, Oxy has provided safe and adequate access to Oxy's employees and contractors utilizing the Valley Road. 1.7.7.1 Circulation and Alignment The road system shall provide adequate and efficient internal circulation within the development and provide reasonable access to public highways serving the development. Roads shall be designed so that alignments will join in a logical manner and combine with adjacent road systems to form a continuous route from 1 area to another. The site will be accessed from a private road owned and maintained by the applicant. The Valley, Mountain, and Mesa access roads (access roads) within the site were designed to allow adequate and efficient internal circulation for trucks visiting the site. The Roadway Standards Figure and Roadway Standards Table 7-107 Map detailing access roads are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. January 2015 ONOLSSON ASSOCIATES 5 Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 1.7.7.2 Interertion No more than 2 streets shall intersect at 1 point, with a minimum of 200 feet between off -set intersections, unless otherwise approved by the County. Many well pad access roads intersect the private lease road, but no more than 2 streets will intersect at 1 point. The Site Plan is included in this submittal. 1.7.7.3 Street Name.,- Street amec Street Names. Street names shall be consistent with the names of existing streets in the same alignment. There shall be no duplication of street names in the County. A street name will not be given to the site access. The site is not accessed by a public road and the road does not allow public access to the site. The access will be classified at a Rural Access Roadway within the site perimeter. The Oxy private lease road is classified as a Rural Access. The Roadway Standards Figure and Roadway Standards Table 7-107 Map detailing access roads are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 1.7.7.4 Congestion nd Safety The road system shall be designed to minimize road congestion and unsafe conditions. The site has been designed to minimize road congestion and unsafe conditions. The site will be accessed from a private lease road and not a county or public road. The site will be accessed by an average of 7 — 11 vehicles a day and will not result in a significant increase to traffic. The Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 1.7.7.5 Continuation of Roads and Dead -End Road Roads shall be arranged to provide for the continuation of major roads between adjacent properties when appropriate and necessary for traffic movement, effective fire protection, or efficient provision of utilities. The site is located on private property and will be accessed by a private lease road owned and maintained by the applicant. The subject parcel is in the Resource Lands zone district and not a populated area. The 7,732 acre subject parcel is located at the end of County Road 213. The site will not impede the movement of traffic. The Access Route figure is located in the Impact Analysis tab. The Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 1.7.7.6 Relationship to Topography Streets shall be designed to be compatible with the topography, creeks, wooded areas, and other natural features. Combinations of steep grades and curves should be avoided. When, due to topography, hazards or other design constraints, additional road width is necessary to provide for the public safety by cut and/or fill area, drainage area, or other road appurtenances along roadways, then dedication or right -of way in excess of the minimum standards set forth in this Code shall be required. January 2015 6 ONS, OLSSON ASSOCIATES Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 The site has been assessed for the Roadway Standards and certified by a professional engineer to provide safe and adequate access to the site, included as attachments to this submittal. 1.7.7.7 Erosion and Drainage The road system shall minimize erosion and provide for efficient and maintainable drainage structures. The access roads have been designed to minimize erosion and have been constructed with drainage features throughout the roads. The access roads are maintained to minimize erosion including regular road maintenance, stormwater BMP installation and inspection, and snow removal. Operational phase 14 day stormwater inspections and post -precipitation stormwater inspections are conducted along the entire roadway to ensure the roadway is in good operational condition. Maintenance and construction items are completed based on the stormwater inspections conducted. Additional BMPs utilized for site access are included in the Roadway Standards Assessments, provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 1.7.7.8 Commercial and Industrial The roads and access in commercial and industrial developments shall be designed to minimize conflict between vehicular and pedestrian traffic. The proposed industrial site will not create conflict between vehicular and pedestrian traffic. The site is located on private property and is access by a private road operated and maintained by the applicant. Personnel on the site will work in areas of traffic. The site was designed to eliminate potential hazards to personnel and will allow safe and efficient traffic flow. Access roads are detailed in the Site Plan which is included as an attachment to this submittal. 1.7.7.9 Emergency Access and Fares Roads shall be designed so as to provide emergency access and egress for residents, occupants, and emergency equipment. Emergency access shall comply with provisions of the International Fire Code and requirements of applicable emergency services, such as fire protection, ambulance, and law enforcement. The access roads have been designed to provide emergency access and egress for personnel and emergency equipment. Emergency responses plans are detailed in the Emergency Response Plan, provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 1.7.7.10 Traffic Control and Street Lightinc Traffic control devices, street signs, street lighting, striping, and pedestrian crosswalks are to be provided as required by the County Road and Bridge Department or other referral agencies. The site will not require traffic control devices or street lighting. The site is located on private property and is accessed by a private road operated and maintained by the applicant. Oxy implements a maximum roadway speed on the access roads of 25 miles per hour. Speed limits are enforced by a private contractor throughout Oxy's Cascade Creek area. The subject parcel is in the Resource Lands zone district and not a populated area. The 7,732 acre subject parcel is located at the end of County Road 213. January 2015 7 ,OLSSON ® ASSOCIATES Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 1.7.7.11 Drainage Structures The access roads have been designed by Rock Solid and DR Griffin and Associates with drainage features. Stormwater mitigations have been implemented in the overall design of the access roads to allow for proper drainage of stormwater away from the roadway. Access road photos are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 1.7.7.12 Roadside Ditches Water flowing in roadside ditches shall be diverted away from the road as quickly as possible. In no case shall water travel in a roadside ditch for a distance greater than 800 feet or have a flow greater than 5 cubic feet per second during a 25 -year, 24-hour storm event. The access roads have been designed based on topography to have at least one roadside ditch along any portion of the roadway. All water flowing in roadside ditches is diverted away from the road through adequate BMPs. The access roads are maintained to minimize erosion to include regular road maintenance, snow removal, stormwater BMPs, and stormwater inspections. January 2015 OLSSON ® ASSOCIATES 8 Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 2.0 CASCADE CREEK MOUNTAIN ROAD 2.1 Scope According to the Garfield County Land Use and Development Code (LUDC) Section 7-107 — Access and Roadways, all roads are required to be designed to provide "adequate and safe access" and reviewed by the designated County Engineer. The Cascade Creek Mountain Road Assessment documents summarize the engineering controls and construction specifications associated with Oxy's Cascade Creek Operating Area Mountain Road which begins below Oxy's switchback 1 and travels up the Talus and Escarpment Zones to Oxy's switchback 6, see Figure 1.— Overview Map. 2.2 Mountain Roat Oxy's Mountain Road is a private access road existing on Oxy property to serve Oil and Gas Exploration and Production activities, see Figure 1. Oxy's Mountain Road begins southwest of Oxy's switchback 1 in the SW 1/4 of Section 20, Township 6 South, Range 97 West of the 6th PM and terminates northeast of switchback 6 in the SE 1/4 of Section 21, Township 6 South, Range 97 West, 6th PM. The Mountain Road is approximately 19,958 feet (3.78 miles) long and traverses the Talus Zone and Escarpment Zone with an elevation change of approximately 2,000 feet to access Oxy's Mesa operational area within the Plateau Zone. The Mountain Road allows for the service of currently 32 well pads, six water storage facilities, and one storage area within Oxy's Mesa operational area. This roadway is typical of roads traversing the Talus and Escarpment Zones providing access to natural gas production facilities and Centralized Exploration and Production Facilities within the Plateau Zones located in Garfield County, Colorado. 2.3 Average Daily Traffic Numbers Oxy collected traffic numbers accessing Oxy's Cascade Creek field between July 2011 and June 2012. Oxy documented traffic numbers at the Lower Guard Shack, located at the terminus of County Road 213, and at the Upper Guard Shack, located above Mountain Road switchback 6, see Figure 1 for guard shack locations. Oxy's traffic count found an average of 120 vehicles travel the Mountain Road each day. '.4 Road Description and Comparison The following table compares Oxy's Mountain Road to the Garfield County Roadway Standards found in Table 7-107 of the LUDC for Rural Access Roads (Table 3 below): January 2015 9 C._OLSSON ASSOCIATES Oxy USA WTP LP Garfield County Roadway Standards Assessment 013-0655 Table 3. Table 7-107 of the LUDC for Rural Access Roads — Mountain Road Table 7-107: Roadway Standards Design Standards Design Capacity (ADT) Rural Access Road Mountain Road 101-200 120 Minimum ROW Width (Feet) 50 N/A Lane Width (Feet) 11 9.9 to >12 Shoulder Width (Feet) 4, 2 min. paved 0 - 20 Ditch Width (Feet) 6 1 - 4 Cross Slope 2% chip/seal, 3% gravel 2% Shoulder Slope 5% 2% Design Speed n/a n/a Minimum Radius (Feet) 80 52, 54, and >80 Maximum % Grade 12% 5 - 13% Surface Gravel Native Material/Gravel Based on the 2011 and 2012 roadway numbers collected by Oxy, the Average Daily Traffic (ADT) for the Mountain Road is expected to be approximately 120 vehicles per day. Oxy's Mountain Road is located on private property and therefore is not located within a ROW. One section of the road along the entire Mountain Road does not meet the Roadway Standards for lane width. This section has a width of 9.9' per lane. Aside from this short section of road, the rest of the Mountain Road meets or exceeds the required 11' lane width. Due to the topography along the mountain road, the shoulder width along the road ranges from 0 — 20 feet. Although not found on the entire Mountain Road, shoulder sections are found along portions of the Mountain Road ensuring the roadway does not become congested within sections of the road. Based on terrain of the road, ditches are constructed on the inside lane of the entire Mountain Road to manage stormwater on the roadway. These ditches convey the stormwater into culverts which pass under Oxy's Mountain Road and dissipate down the hillside. Two of the six switchbacks as part of Oxy's Mountain Road do not accommodate a minimum turning radius of 80 feet as required by the Rural Access Roadway Standards. These locations are Oxy's switchback 2 with a turning radius of 52' and Oxy's switchback 6 with a turning radius of 54'. Oxy's Mountain Road grade ranges from 5% to 13%, as compared to the Rural Access Roadway standard requiring a maximum grade of 12%. Within the Mountain Road, only one roadway section does not meet the grade requirements of the Rural Access Roadway Standards. t.5 iviountain i•coaa isest Wvianagenienr rraciices Oxy has implemented the following Best Management Practices (BMPs) to aid in providing adequate and safe access where Oxy's Mountain Road does not meet Secondary Access Roadway standards. The following signage is posted along the Mountain Road: Limit access from public and only allowing authorized personnel to utilize the road Speed limit signs of 20 miles per hour or less. Speed limits are enforced by a private contractor throughout Oxy's Cascade Creek area. Switchback number signage to aid in roadway identification Uphill traffic has the right of way. This aids in reducing the amount of congestion along the roadway and allows for more efficient passage during inclement weather or busy times of the day. January 2015 10 C._OLSSON ASSOCIATES Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 Through most of the Mountain Road, Oxy has installed Jersey barriers or Hesco barriers along the outside edge of the road to aid in safe passage. These sections of barriers are mainly installed through less visible, narrow, or steep sections of road. The entire road is not edged with barriers to allow for snow removal and blading operations to have adequate locations for snow and gravel storage. Oxy conducts 14 day stormwater inspections as well as post -precipitation inspections along the entire Mountain Road. These inspections document Mountain Road and stormwater feature condition and document road maintenance issues needed for repair on a regular basis. Oxy completes regular maintenance of the Mountain Road to include grading, snow removal, maintaining stormwater BMPs, and upgrading or improvements to the roadway identified during operation. During spring and winter, Oxy requires the use of chains on the Mountain Road as a precautionary BMP. Additionally, Oxy maintains a website to allow contractors to monitor current site conditions and road alerts for requiring chains, or closed roads due to weather conditions. During dry periods and windy events, Oxy completes dust suppression using water and chemical suppressant (i.e. magnesium chloride) spreading to ensure safe visibility is not impaired during wind events. Details on dust controls are provided in Oxy's Dust Management Plan, located in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 2.6 Mountain Road Best Assessment Conclusion Given the on-going construction and maintenance activities completed by DIA Construction, BMP implementation and maintenance completed by DIA Construction and McIntyre Construction, and vehicle traffic volumes, Oxy has provided safe and adequate access to Oxy's employees and contractors utilizing the Mountain Road. 2.7 Mountain Road — General Approval Standards Narrative (Article 7 Division 107) 2.7.1 Introduction The following section addresses the requirements for the General Approval Standards under Article 7, Division 107 of the Garfield County Land Use and Development Code (LUDC). 2.7.2 Access to Public Right -of -Way All lots and parcels shall have legal and physical access to a public right-of-way. The proposed site has legal access from an existing OXY Lease Road which is accessed by County Road 213. The proposed site will use the existing access that was established when the site location was originally developed. The Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. January 2015 11 C._OLSSON ASSOCIATES c Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 2.7.3 Safe Access Access to and from the use shall be safe and in conformance with applicable County, State, and Federal access regulations. Where the Land Use Change causes warrant(s) for improvements to State or Federal highways or County Roads, the developer shall be responsible for paying for those improvements. The subject access roads were designed to provide safe access to the Cascade Creek Field. The access road has been assessed and certified by a professional engineer as safe and adequate for Rural Access standards. The subject access roads do not warrant improvements to County Roads, State, or Federal Highways. The site is accessed from an existing private access road and does not result in a significant increase to traffic on public roads. All roads located on the subject parcel are maintained by OXY to achieve optimal safety, including speed restrictions, regular road maintenance, and snow maintenance. The subject access road will adhere to Oxy's Fugitive Dust Mitigation Plan. The Dust Mitigation Plan, Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. Given the on-going construction and maintenance activities completed by DIA Construction, BMP implementation and maintenance completed by DIA Construction and McIntyre Construction, and vehicle traffic volumes, Oxy has provided safe and adequate access to Oxy's employees and contractors utilizing the Mountain Road. 2.7.4 Adequate Capacity Access serving the proposed use shall have the capacity to efficiently and safely service the additional traffic generated by the use. The use shall not cause traffic congestion or unsafe traffic conditions, impacts to the County, State, and Federal roadway system shall be mitigated through roadway improvements or impact fees, or both. Vehicles accessing the site will not result in an overall significant increase to current traffic. The proposed site will not cause congestion and unsafe conditions to the County, State, and Federal roadway systems. On average, 7 —11 vehicles will access the site daily. Details on traffic statistics and recommendations are described in the Traffic Study, included as an attachment to this submittal. The private lease road maintained and owned by Oxy is classified as Rural Access and is certified by a professional engineer as safe and adequate for the rural access roadway standards. The Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. Given the on-going construction and maintenance activities completed by DIA Construction, BMP implementation and maintenance completed by DIA Construction and McIntyre Construction, and vehicle traffic volumes, Oxy has provided safe and adequate access to Oxy's employees and contractors utilizing the Mountain Road. January 2015 12 O\OLSSON ® ASSOCIATES r Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 2.7.5 Road Dedications All rights-of-way shall be dedicated to the public and so designated on the Final Plat. They will not, however, be accepted as County roads unless the BOCC specifically designates and accepts them as such. The proposed site is located on private land and is accessed by a private road owned by the applicant. The site will not allow public access. A right-of-way road dedication is not applicable to the site. The Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 2.7.6 Impacts Mitigated Impacts to County roads associated with hauling, truck traffic, and equipment use shall be mitigated through roadway improvements or impact fees, or both. Impacts to County roads are not anticipated. The access road use will not result in an overall significant increase to current traffic. Details on traffic statistics and recommendations are described in the Traffic Study, provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. The site will adhere to Oxy's Fugitive Dust Mitigation plan. The Dust Mitigation Plan, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 2.7.7 Design Standards Roadways, surfaces, curbs and gutters, and sidewalks shall be provided as follows to Table 7- 107. The Average Daily Traffic (ADT) for the proposed site is 7 — 11 vehicles. The site was assessed to meet the requirements of the Rural Access standards of Table 7-107 of the Garfield County LUDC. A professional engineer certified the access road to be safe and adequate following the rural access roadway standards (Table 4 below): Table 4. Table 7-107 Roadway Standards — Mountain Road Table 7-107: Roadway Standards Design Standards Design Capacity (ADT) Rural Access Road Mountain Road 101-200 120 Minimum ROW Width (Feet) 50 N/A Lane Width (Feet) 11 9.9 to >12 Shoulder Width (Feet) 4, 2 min. paved 0 — 20 Ditch Width (Feet) 6 1 — 4 Cross Slope 2% chip/seal, 3% gravel 2% Shoulder Slope 5% <5% Design Speed n/a n/a Minimum Radius (Feet) 80 52, 54, and >80 Maximum % Grade 12% 5 — 13% Surface Gravel Native Material/Gravel The Roadway Standards Figure, Roadway Standards Table 7-107 Map, and Site Plan are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. January 2015 QLSSON ASSOCIATES 13 Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 Given the on-going construction and maintenance activities completed by DIA Construction, BMP implementation and maintenance completed by DIA Construction and McIntyre Construction, and vehicle traffic volumes, Oxy has provided safe and adequate access to Oxy's employees and contractors utilizing the Mountain Road. 2.7.7.1 Circulation and Alignment The road system shall provide adequate and efficient internal circulation within the development and provide reasonable access to public highways serving the development. Roads shall be designed so that alignments will join in a logical manner and combine with adjacent road systems to form a continuous route from 1 area to another. The site will be accessed from a private road owned and maintained by the applicant. The Valley, Mountain, and Mesa access roads (access roads) within the site were designed to allow adequate and efficient internal circulation for trucks visiting the site. The Roadway Standards Figure and Roadway Standards Table 7-107 Map detailing access roads are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 2.7.7.2 Intersection:: No more than 2 streets shall intersect at 1 point, with a minimum of 200 feet between off -set intersections, unless otherwise approved by the County. Many well pad access roads intersect the private lease road, but no more than 2 streets will intersect at 1 point. The Site Plan is included in this submittal. 2.7.7.3 Street Names Street Names. Street names shall be consistent with the names of existing streets in the same alignment. There shall be no duplication of street names in the County. A street name will not be given to the site access. The site is not accessed by a public road and the road does not allow public access to the site. The access will be classified at a Rural Access Roadway within the site perimeter. The Oxy private lease road is classified as a Rural Access. The Roadway Standards Figure and 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 2.7.7.4 Congestion and Safety The road system shall be designed to minimize road congestion and unsafe conditions. The site has been designed to minimize road congestion and unsafe conditions. The site will be accessed from a private lease road and not a county or public road. The site will be accessed by an average of 7 — 11 vehicles a day and will not result in a significant increase to traffic. The Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. January 2015 QLSSON ASSOCIATES 14 Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 2.7.7.5 Continuation of Roads and Dead -End Roads Roads shall be arranged to provide for the continuation of major roads between adjacent properties when appropriate and necessary for traffic movement, effective fire protection, or efficient provision of utilities. The site is located on private property and will be accessed by a private lease road owned and maintained by the applicant. The subject parcel is in the Resource Lands zone district and not a populated area. The 7,732 acre subject parcel is located at the end of County Road 213. The site will not impede the movement of traffic. The Access Route figure is located in the Impact Analysis tab. The Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 2.7.7.6 Relationship to Topography Streets shall be designed to be compatible with the topography, creeks, wooded areas, and other natural features. Combinations of steep grades and curves should be avoided. When, due to topography, hazards or other design constraints, additional road width is necessary to provide for the public safety by cut and/or fill area, drainage area, or other road appurtenances along roadways, then dedication or right -of way in excess of the minimum standards set forth in this Code shall be required. The site has been assessed for the Roadway Standards and certified by a professional engineer to provide safe and adequate access to the site, included as attachments to this submittal. 2 7.7 7 Frnsion and Drainage The road system shall minimize erosion and provide for efficient and maintainable drainage structures. The access roads have been designed to minimize erosion and have been constructed with drainage features throughout the roads. The access roads are maintained to minimize erosion including regular road maintenance, stormwater BMP installation and inspection, and snow removal. Operational phase 14 day stormwater inspections and post -precipitation stormwater inspections are conducted along the entire roadway to ensure the roadway is in good operational condition. Maintenance and construction items are completed based on the stormwater inspections conducted. Additional BMPs utilized for site access are included in the Roadway Standards Assessments, provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 2.7.7.8 Commercial and Industrial The roads and access in commercial and industrial developments shall be designed to minimize conflict between vehicular and pedestrian traffic. The proposed industrial site will not create conflict between vehicular and pedestrian traffic. The site is located on private property and is access by a private road operated and maintained by the applicant. Personnel on the site will work in areas of traffic. The site was designed to eliminate potential hazards to personnel and will allow safe and efficient traffic flow. Access roads are detailed in the Site Plan which is included as an attachment to this submittal. January 2015 15 QLSSON ASSOCIATES Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 2.7.7.9 Emergency Access and Egress Roads shall be designed so as to provide emergency access and egress for residents, occupants, and emergency equipment. Emergency access shall comply with provisions of the International Fire Code and requirements of applicable emergency services, such as fire protection, ambulance, and law enforcement. The access roads have been designed to provide emergency access and egress for personnel and emergency equipment. Emergency responses plans are detailed in the Emergency Response Plan, provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 2.7. 7.10 Traffic Control and Street Lightinc. Traffic control devices, street signs, street lighting, striping, and pedestrian crosswalks are to be provided as required by the County Road and Bridge Department or other referral agencies. The site will not require traffic control devices or street lighting. The site is located on private property and is accessed by a private road operated and maintained by the applicant. Oxy implements a maximum roadway speed on the access roads of 25 miles per hour. Speed limits are enforced by a private contractor throughout Oxy's Cascade Creek area. The subject parcel is in the Resource Lands zone district and not a populated area. The 7,732 acre subject parcel is located at the end of County Road 213. 2.7.7.11 Drainage Structures The access roads have been designed by Rock Solid and DR Griffin and Associates with drainage features. Stormwater mitigations have been implemented in the overall design of the access roads to allow for proper drainage of stormwater away from the roadway. Access road photos are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. Roadside Ditches Water flowing in roadside ditches shall be diverted away from the road as quickly as possible. In no case shall water travel in a roadside ditch for a distance greater than 800 feet or have a flow greater than 5 cubic feet per second during a 25 -year, 24-hour storm event. The access roads have been designed based on topography to have at least one roadside ditch along any portion of the roadway. All water flowing in roadside ditches is diverted away from the road through adequate BMPs. The access roads are maintained to minimize erosion to include regular road maintenance, snow removal, stormwater BMPs, and stormwater inspections. January 2015 16 QLSSON ASSOCIATES Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 3.0 CASCADE CREEK MESA ROAD 3.1 Scope According to the Garfield County Land Use and Development Code (LUDC) Section 7-107 — Access and Roadways, all roads are required to be designed to provide "adequate and safe access" and reviewed by the designated County Engineer. The Cascade Creek Mesa Road Assessment documents summarize the engineering controls and construction specifications associated with Oxy's Cascade Creek Operating Area Mesa Road which begins at Oxy's switchback 6 and travels the Plateau Zone to Oxy's 604-12-13 Storage Site and 697-16-16 Storage Site, see Figure 1— Overview Map. 3.2 Mesa Road Oxy's Mesa Road is a private access road existing on Oxy property to serve Oil and Gas Exploration and Production activities, see Figure 1. Oxy's Mesa Road begins northeast of switchback 6 in the SE 1/4 of Section 21, Township 6 South, Range 97 West, 6th PM and terminates at the entrance of the 604-12-13 Storage Site and 697-16-16 Storage Site facility located in the NE 1/4 of the SE 1/4 of Section 4, Township 6 South, Range 97 West, 6th PM. The Mesa Road is approximately 43,010 feet (8.15 miles) long and traverses the Plateau Zone to access the site. The Mesa Road allows for the service of currently 38 well pads, six water storage facilities, and one storage area within Oxy's Mesa operational area. This roadway is typical of roads traversing the Plateau Zone providing access to natural gas production facilities and Centralized Exploration and Production Facilities within the Plateau Zone located in Garfield County, Colorado. 3.3 Averaae Daily Traffic Number• Oxy collected traffic numbers accessing Oxy's Cascade Creek field between July 2011 and June 2012. Oxy documented traffic numbers at the Lower Guard Shack, located at the terminus of County Road 213, and at the Upper Guard Shack, located above Mountain Road switchback 6, see Figure 1 for guard shack locations. Oxy's traffic count found an average of 120 vehicles travel the Mesa Road each day. .�. r uawad Descriptio,, ,uyd Comparison The following table compares Oxy's Mesa Road to the Garfield County Roadway Standards found in Table 7-107 of the LUDC for Rural Access Roads (Table 3 below): January 2015 17 C._OLSSON ASSOCIATES Oxy USA WTP LP Garfield County Roadway Standards Assessment 013-0655 Table 5. Table 7-107 of the LUDC for Rural Access Roads — Mesa Road Table 7-107: Roadway Standards Design Standards Rural Access Road Mesa Road 120 Design Capacity (ADT) 101-200 Minimum ROW Width (Feet) 50 N/A Lane Width (Feet) 11 9.9 to >12 Shoulder Width (Feet) 4, 2 min. paved 0 - 10 Ditch Width (Feet) 6 1 - 4 Cross Slope 2% chip/seal, 3% gravel <2%% Shoulder Slope 5% 0 to <5% Design Speed n/a 25 MPH Minimum Radius (Feet) 80 >80 Maximum % Grade 12% <12%, except 5 sections Surface Gravel Native Material/Gravel Based on the 2011 and 2012 roadway numbers collected by Oxy, the Average Daily Traffic (ADT) for the Mesa Road is expected to be approximately 120 vehicles per day. Oxy's Mesa Road is located on private property and therefore is not located within a ROW. Four sections along the entire Mesa Road do not meet the Roadway Standards for lane width. Aside from these short sections of road, the rest of the Mesa Road meets or exceeds the required 11' lane width. Due to the topography along the Mesa Road, the shoulder width along the road ranges from 0 — 10 feet. Although not found on the entire Mesa Road, shoulder sections are found along portions of the Mesa Road ensuring the roadway does not become congested within sections of the road. Based on terrain of the road, ditches are constructed on at least one side of the Mesa Road to manage stormwater on the roadway. These ditches convey the stormwater into culverts which dissipate stormwater away from the roadway. All switchbacks associated with the Mesa Road access to 604-12-13 Storage Site and 697-16-16 Storage Site accommodate a minimum turning radius of 80 feet as required by the Rural Access Roadway Standards. Except for five sections, Oxy's Mountain Road grade meets the maximum grade requirement of Rural Access roads of 12%. 3.5 Mountain Road Rct MMnrlgement Practices Oxy has implemented the following Best Management Practices (BMPs) to aid in providing adequate and safe access where Oxy's Mesa Road does not meet Secondary Access Roadway standards: Limit access from public and only allowing authorized personnel to utilize the road Speed limit signs of 20 miles per hour or less. Speed limits are enforced by a private contractor throughout Oxy's Cascade Creek area. Uphill traffic has the right of way. This aids in reducing the amount of congestion along the roadway and allows for more efficient passage during inclement weather or busy times of the day. Oxy conducts 14 day stormwater inspections as well as post -precipitation inspections along the entire Mesa Road. These inspections document Mesa Road and stormwater feature condition and document road maintenance issues needed for repair on a regular basis. January 2015 18 C._OLSSON ASSOCIATES Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 Oxy completes regular maintenance of the Mesa Road to include grading, snow removal, maintaining stormwater BMPs, and upgrading or improvements to the roadway identified during operation. During spring and winter, Oxy requires the use of chains on the Mesa Road as a precautionary BMP. Additionally, Oxy maintains a website to allow contractors to monitor current site conditions and road alerts for requiring chains, or closed roads due to weather conditions. During dry periods and windy events, Oxy completes dust suppression using water and chemical suppressant (i.e. magnesium chloride) spreading to ensure safe visibility is not impaired during wind events. Details on dust controls are provided in Oxy's Dust Management Plan, located in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 3.6 Mountain Road Best Assessment Conclusion Given the on-going construction and maintenance activities completed by DIA Construction, BMP implementation and maintenance completed by DIA Construction and McIntyre Construction, and vehicle traffic volumes, Oxy has provided safe and adequate access to Oxy's employees and contractors utilizing the Mesa Road. 3.7 Access Roads — Genera; Approval Standards Narrative (Article 7 Division 107) 3.7.1 Introduction The following section addresses the requirements for the General Approval Standards under Article 7, Division 107 of the Garfield County Land Use and Development Code (LUDC). 3.7.2 Access to Public Right -of -Way All lots and parcels shall have legal and physical access to a public right-of-way. The proposed site has legal access from an existing OXY Lease Road which is accessed by County Road 213. The proposed site will use the existing access that was established when the site location was originally developed. The Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 3.7.3 Safe Access Access to and from the use shall be safe and in conformance with applicable County, State, and Federal access regulations. Where the Land Use Change causes warrant(s) for improvements to State or Federal highways or County Roads, the developer shall be responsible for paying for those improvements. The subject access roads were designed to provide safe access to the Cascade Creek Field. The access road has been assessed and certified by a professional engineer as safe and adequate for Rural Access standards. The subject access roads do not warrant improvements to County Roads, State, or Federal Highways. The site is accessed from an existing private access road and does not result in a significant increase to traffic on public roads. All roads located on the subject parcel are maintained by OXY to achieve optimal safety, including speed restrictions, regular road maintenance, and snow maintenance. The subject access road will adhere to Oxy's Fugitive Dust Mitigation Plan. The Dust Mitigation Plan, Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are January 2015 19 C._OLSSON ASSOCIATES Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. Given the on-going construction and maintenance activities completed by DIA Construction, BMP implementation and maintenance completed by DIA Construction and McIntyre Construction, and vehicle traffic volumes, Oxy has provided safe and adequate access to Oxy's employees and contractors utilizing the Mesa Road. 3.7.4 Adequate Capacity Access serving the proposed use shall have the capacity to efficiently and safely service the additional traffic generated by the use. The use shall not cause traffic congestion or unsafe traffic conditions, impacts to the County, State, and Federal roadway system shall be mitigated through roadway improvements or impact fees, or both. Vehicles accessing the site will not result in an overall significant increase to current traffic. The proposed site will not cause congestion and unsafe conditions to the County, State, and Federal roadway systems. On average, 7 — 11 vehicles will access the site daily. Details on traffic statistics and recommendations are described in the Traffic Study, included as an attachment to this submittal. The private lease road maintained and owned by Oxy is classified as Rural Access and is certified by a professional engineer as safe and adequate for the rural access roadway standards. The Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. Given the on-going construction and maintenance activities completed by DIA Construction, BMP implementation and maintenance completed by DIA Construction and McIntyre Construction, and vehicle traffic volumes, Oxy has provided safe and adequate access to Oxy's employees and contractors utilizing the Mesa Road. 3.7.5 Road Dedications All rights-of-way shall be dedicated to the public and so designated on the Final Plat. They will not, however, be accepted as County roads unless the BOCC specifically designates and accepts them as such. The proposed site is located on private land and is accessed by a private road owned by the applicant. The site will not allow public access. A right-of-way road dedication is not applicable to the site. The Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 3.7.6 Impacts Mitigated Impacts to County roads associated with hauling, truck traffic, and equipment use shall be mitigated through roadway improvements or impact fees, or both. Impacts to County roads are not anticipated. The access road use will not result in an overall significant increase to current traffic. Details on traffic statistics and recommendations are described in the Traffic Study, provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. The site will adhere to Oxy's Fugitive Dust Mitigation plan. The Dust Mitigation Plan, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 January 2015 20 O\OLSSON ® ASSOCIATES Oxy USA WTP LP Garfield County Roadway Standards Assessment 013-0655 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 3.7.7 Design Standaras Roadways, surfaces, curbs and gutters, and sidewalks shall be provided as follows to Table 7- 107. The Average Daily Traffic (ADT) for the proposed site is 7 — 11 vehicles. The site was assessed to meet the requirements of the Rural Access standards of Table 7-107 of the Garfield County LUDC. A professional engineer certified the access road to be safe and adequate following the rural access roadway standards (Table 6 below): Table 6. Table 7-107 Roadway Standards — Mesa Road Table 7-107: Roadway Standards Design Standards Design Capacity (ADT) Rural Access Road Mesa Road 120 101-200 Minimum ROW Width (Feet) 50 N/A Lane Width (Feet) 11 9.9 to >12 Shoulder Width (Feet) 4, 2 min. paved 0 — 10 Ditch Width (Feet) 6 1 — 4 Cross Slope 2% chip/seal, 3% gravel <2%% Shoulder Slope 5% <50/0 Design Speed n/a 25 MPH Minimum Radius (Feet) 80 >80 Maximum % Grade 12% <12%, except 5 sections Surface Gravel Native Material/Gravel The Roadway Standards Figure, Roadway Standards Table 7-107 Map, and Site Plan are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. Given the on-going construction and maintenance activities completed by DIA Construction, BMP implementation and maintenance completed by DIA Construction and McIntyre Construction, and vehicle traffic volumes, Oxy has provided safe and adequate access to Oxy's employees and contractors utilizing the Mesa Road. 3.7.7.1 Circulation and Alignment The road system shall provide adequate and efficient internal circulation within the development and provide reasonable access to public highways serving the development. Roads shall be designed so that alignments will join in a logical manner and combine with adjacent road systems to form a continuous route from 1 area to another. The site will be accessed from a private road owned and maintained by the applicant. The Valley, Mountain, and Mesa access roads (access roads) within the site were designed to allow adequate and efficient internal circulation for trucks visiting the site. The Roadway Standards Figure and Roadway Standards Table 7-107 Map detailing access roads are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 3.7.7.2 Intersections No more than 2 streets shall intersect at 1 point, with a minimum of 200 feet between off -set intersections, unless otherwise approved by the County. January 2015 QLSSON ASSOCIATES 21 Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 Many well pad access roads intersect the private lease road, but no more than 2 streets will intersect at 1 point. The Site Plan is included in this submittal. 3.7.7.3 Street Names Street Names. Street names shall be consistent with the names of existing streets in the same alignment. There shall be no duplication of street names in the County. A street name will not be given to the site access. The site is not accessed by a public road and the road does not allow public access to the site. The access will be classified at a Rural Access Roadway within the site perimeter. The Oxy private lease road is classified as a Rural Access. The Roadway Standards Figure and Roadway Standards Table 7-107 Map detailing access roads are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 3.7.7.4 Congestion and Safety The road system shall be designed to minimize road congestion and unsafe conditions. The site has been designed to minimize road congestion and unsafe conditions. The site will be accessed from a private lease road and not a county or public road. The site will be accessed by an average of 7 — 11 vehicles a day and will not result in a significant increase to traffic. The Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 3.7.7.5 Continuation of Roads and Dead -End Roads Roads shall be arranged to provide for the continuation of major roads between adjacent properties when appropriate and necessary for traffic movement, effective fire protection, or efficient provision of utilities. The site is located on private property and will be accessed by a private lease road owned and maintained by the applicant. The subject parcel is in the Resource Lands zone district and not a populated area. The 7,732 acre subject parcel is located at the end of County Road 213. The site will not impede the movement of traffic. The Access Route figure is located in the Impact Analysis tab. The Traffic Study, Access Roads Figure, Roadway Standards Figure, and Roadway Standards Table 7-107 Map are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 3.7.7.6 Relationship to Topography Streets shall be designed to be compatible with the topography, creeks, wooded areas, and other natural features. Combinations of steep grades and curves should be avoided. When, due to topography, hazards or other design constraints, additional road width is necessary to provide for the public safety by cut and/or fill area, drainage area, or other road appurtenances along roadways, then dedication or right -of way in excess of the minimum standards set forth in this Code shall be required. The site has been assessed for the Roadway Standards and certified by a professional engineer to provide safe and adequate access to the site, included as attachments to this submittal. January 2015 OLSSON ® ASSOCIATES 22 Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 3.7.7.7 Erosion and Drainage The road system shall minimize erosion and provide for efficient and maintainable drainage structures. The access roads have been designed to minimize erosion and have been constructed with drainage features throughout the roads. The access roads are maintained to minimize erosion including regular road maintenance, stormwater BMP installation and inspection, and snow removal. Operational phase 14 day stormwater inspections and post -precipitation stormwater inspections are conducted along the entire roadway to ensure the roadway is in good operational condition. Maintenance and construction items are completed based on the stormwater inspections conducted. Additional BMPs utilized for site access are included in the Roadway Standards Assessments, provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 3.7.7.8 Commercial and Industrial The roads and access in commercial and industrial developments shall be designed to minimize conflict between vehicular and pedestrian traffic. The proposed industrial site will not create conflict between vehicular and pedestrian traffic. The site is located on private property and is access by a private road operated and maintained by the applicant. Personnel on the site will work in areas of traffic. The site was designed to eliminate potential hazards to personnel and will allow safe and efficient traffic flow. Access roads are detailed in the Site Plan which is included as an attachment to this submittal. 3.7.7.9 Emergency Access and Egress Roads shall be designed so as to provide emergency access and egress for residents, occupants, and emergency equipment. Emergency access shall comply with provisions of the International Fire Code and requirements of applicable emergency services, such as fire protection, ambulance, and law enforcement. The access roads have been designed to provide emergency access and egress for personnel and emergency equipment. Emergency responses plans are detailed in the Emergency Response Plan, provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. 3.7.7.10 Traffic Control and Street Lighting Traffic control devices, street signs, street lighting, striping, and pedestrian crosswalks are to be provided as required by the County Road and Bridge Department or other referral agencies. The site will not require traffic control devices or street lighting. The site is located on private property and is accessed by a private road operated and maintained by the applicant. Oxy implements a maximum roadway speed on the access roads of 25 miles per hour. Speed limits are enforced by a private contractor throughout Oxy's Cascade Creek area. The subject parcel is in the Resource Lands zone district and not a populated area. The 7,732 acre subject parcel is located at the end of County Road 213. January 2015 OLSSON ® ASSOCIATES 23 Garfield County Roadway Standards Assessment Oxy USA WTP LP 013-0655 3.7.7.11 Drainage Structures The access roads have been designed by Rock Solid and DR Griffin and Associates with drainage features. Stormwater mitigations have been implemented in the overall design of the access roads to allow for proper drainage of stormwater away from the roadway. Access road photos are provided in the 604-12-13 Storage Site and 697-16-16 Storage Site submittal. Roadside Ditches Water flowing in roadside ditches shall be diverted away from the road as quickly as possible. In no case shall water travel in a roadside ditch for a distance greater than 800 feet or have a flow greater than 5 cubic feet per second during a 25 -year, 24-hour storm event. The access roads have been designed based on topography to have at least one roadside ditch along any portion of the roadway. All water flowing in roadside ditches is diverted away from the road through adequate BMPs. The access roads are maintained to minimize erosion to include regular road maintenance, snow removal, stormwater BMPs, and stormwater inspections. January 2015 OLSSON ® ASSOCIATES 24 FIGURES C ►.oLSSON ASSOCIATES r" OXY USA WTP LP i3X y 760 Horizon Drive, Suite 101 16, Grand Junction, CO 81506 Figre 1 - Overview Map for Garfield County Road Standards Assessment Updated: January 19, 2015 Garfield County, Colorado 0 0.3 0.6 0.9 1.2 1.5 Miles 604-12-13 Storage Area 697-16-16 Storage Area T6S-R97W In Storage Sites Oxy Guard Shack Oxy Roadway Section Nig. Mesa Road Segment Mountain Road Segment "40 Valley Road Segment Unimproved Public Road Gravel Public Road Paved Public Road OXY USA WTP LP i3xy 760 Horizon Drive, Suite 101 16, Grand Junction, CO 81506 LRS Figre 2 - Valley Section for Garfield County Road Standards Assessment Updated: January 19, 2015 Garfield County, Colorado 0 0.15 0.3 0.45 0.6 0.75 Miles T6S-R97W T7SsR97W In Storage Sites Oxy Roadway Section 0"44,0 Mesa Road Segment Mountain Road Segment ^," Valley Road Segment Unimproved Public Road Gravel Public Road Paved Public Road "1111111k OXY USA WTP LP OXY 760 Horizon Drive, Suite 101 Grand Junction, CO 81506 Figure 3 - Mountain Road Section for Garfield County Road Standards Assessment Updated: January 19, 2015 Garfield County, Colorado 0 0.1 0.2 0.3 Miles 1 r r-' In Storage Sites Oxy Roadway Section 4"..,„" Mesa Road Segment Mountain Road Segment ^p Valley Road Segment Unimproved Public Road 1' �i Gravel Public Road giNgatr Paved Public Road "111111k OXY USA WTP LP all 7f 760 Horizon Drive, Suite 101 Grand Junction, CO 81506 T5S-R97W Figure 4 - Mesa Section for Garfield County Road Standards Assessment Updated: January 19, 2015 Garfield County, Colorado 0 0.25 0.5 0.75 1 Miles 604-12-13 Storage Area 697-16-16 Storage Area 002 In Storage Sites Oxy Roadway Section ON,,,p Mesa Road Segment Mountain Road Segment "too Valley Road Segment Unimproved Public Road Gravel Public Road "�J Paved Public Road