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HomeMy WebLinkAbout1.00 General Application MaterialsIHC -Scott Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 Prepared by 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 Floodplain Development Permit Narrative for Rifle Pit #1 IHC-SCOTT Prepared By Richard (Chip) Fisher, P.E. QC Reviewed By Angela B. Fowler, P.E. SGM Project 2019-341.002 Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 1 Table of Contents 1.0 Project Description .................................................................................................... 1 2.0 Engineering and Floodplain Analysis .......................................................................... 1 3.0 Proof of Ownership and Statement of Authority ............................................................ 1 4.0 Analysis of LUDC Article 3 ......................................................................................... 2 4.1 Section 3-301.A Use Restrictions in the Floodplain Overlay ........................................ 2 4.2 Section 3-301.B General Standards ........................................................................ 2 4.3 Section 3-301.C Specific Standards ........................................................................ 2 4.4 Section 3-301.D Floodway ..................................................................................... 2 4.5 Section 3-301.E Standards for Areas of Shallow Flooding ......................................... 3 4.6 Section 3-301.F Properties Removed from the Floodplain by Fill ................................. 3 4.7 Section 3-301.G Alteration of a Watercourse ........................................................... 3 4.8 Section 3-301.H Standards for Critical Facilities ....................................................... 3 5.0 Analysis of LUDC Article 4 ......................................................................................... 3 5.1 Section 4-102 Applicability of Common Review Procedures ....................................... 3 5.2 Section 4-109.C Review Criteria of Development in the 100-year Floodplain ............... 3 Analysis of Section 4-109.C.1.......................................................................... 3 Analysis of Section 4-109.C.2.......................................................................... 3 Analysis of Section 4-109.C.3.......................................................................... 3 Analysis of Section 4-109.C.4.......................................................................... 4 Analysis of Section 4-109.C.5.......................................................................... 4 Analysis of Section 4-109.C.6.......................................................................... 4 Analysis of Section 4-109.C.7.......................................................................... 4 Analysis of Section 4-109.C.8.......................................................................... 4 Analysis of Section 4-109.C.9.......................................................................... 4 Analysis of Section 4-109.C.10 ....................................................................... 4 5.3 Section 4-201 Application Materials ....................................................................... 5 5.4 Section 4-203.O Floodplain Analysis ...................................................................... 5 6.0 Analysis of LUDC Article 7 ......................................................................................... 5 6.1 Section 7-203.A Minimum Setback ......................................................................... 5 6.2 Section 7-203.B Structures Permitted in Setback ........................................................ 5 6.3 Section 7-203.C Structures and Activity Prohibited in Setback .................................... 6 Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 2 6.4 Section 7-203.D Compliance with State and Federal Laws ......................................... 6 7.0 Engineer’s Contact Information ................................................................................... 6 Attachment A ..................................................................................................................... A Attachment B ..................................................................................................................... B Attachment C ..................................................................................................................... C Attachment D ..................................................................................................................... D Attachment E ...................................................................................................................... E Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 1 1.0 Project Description IHC Scott (Scott, the “Applicant”) is seeking a Floodplain Development Permit for a commercial gravel pit (Rifle Gravel Pit #1; “Project”) to be located on a 58.7-acre parcel immediately north of Interstate 70 between the Towns of Rifle and Silt. The parcel is located off County Road (CR) 346, accessed from the Mamm Creek I-70 interchange. The entire project would be located on one parcel (Parcel ID #217908300103), owned by Scott. The parcel is currently vacant, with no structures or active land management activity. The parcel has been historically used as irrigated pasture for cattle grazing for several years and receives irrigation water via a tailwater ditch but has not received intentional irrigation water application since Scott acquired the parcel in 2019. The parcel continues to be used on an occasional and incidental basis for cattle grazing while Scott develops the plans for the commercial gravel pit. The proposed development would be a wet mining operation where the topsoil and mineral overburden would be removed and stockpiled for onsite use or sale as topsoil and clean fill respectively, and the underlying saturated alluvial gravels would be excavated in a saturated state. Excavation would be accomplished using a long-reach excavator located on the upper rim of the excavated pit. No dewatering nor groundwater pumping would occur with this proposed mining development, and the excavated pit would fill with groundwater to become a pond as mining progresses through the site. IHC-Scott retained SGM to prepare a Floodplain Development Permit and this narrative, along with the listed attachments, addresses all technical and engineering requirements from the pertinent sections of the Garfield County Land Use Development Code (LUDC). 2.0 Engineering and Floodplain Analysis SGM developed engineering drawings (Attachment A) to quantify the extents and quantities of disturbance and extracted materials from the Project area. An estimated 100- year floodplain and floodway delineation with base flood elevation (BFE1) were determined by SGM to address the pertinent sections of the LUDC. The effective FEMA study area (Panel 0802051360B dated 12/15/1977) covering the project area shows a Zone A floodplain, which is an unstudied approximate floodplain delineation. The 100-year flood event of the Colorado River was modeled to determine a base flood elevation and floodplain delineation. The Floodplain Engineering Report (Attachment B) discusses the methodology used to determine the base flood elevation in the vicinity of the Project area as well as the floodplain and floodway delineations. The modeled floodplain and floodway delineations determined by SGM are clearly defined and labeled in the engineering drawings (Attachment A). 3.0 Proof of Ownership and Statement of Authority Attachment C contains the statement of authority, title commitment dated 9/8/2020, and the certification of mineral rights owner research form. 1 Base flood elevation (BFE) is the water surface elevation during the 100-year flood event. Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 2 4.0 Analysis of LUDC Article 3 4.1 Section 3-301.A Use Restrictions in the Floodplain Overlay Per Table 3-301 in the LUDC, a gravel mine is permitted in the 100-year floodplain but not permitted in the floodway. Sheet 3 of Attachment A shows that the 100-year floodplain covers a portion of the Scott parcel and the Project area. The floodway does not cover any portion of the parcel. 4.2 Section 3-301.B General Standards A proposed mobile or prefabricated office/scale-house building is to be placed outside of the floodplain, within the designated “Operations Area” shown on Sheets 6 & 7 of Attachment A. As a precaution against the unlikely case of shallow inundation, SGM recommends that any structures be anchored to reinforced concrete caissons and built with a lowest finished floor elevation (FFE) of 5385.14’, or 1-foot above the BFE, in the vicinity of the operations pad area. No permanent structures or hazardous material storage areas will be placed within the actively mined gravel pit area, the floodplain, or the floodway. No new or replacement water supply or sanitary sewer systems are proposed to be installed at the gravel pit area. Drinking water will be delivered to the site. Scott will contract with a vault-and-haul vendor to provide wastewater (and hand-washing water) services. Scott will have a trailer outfitted with two restrooms for staff. This trailer will have one 2,000-gallon tank to capture waste from the toilet and handwashing facilities. A high-level float alarm will also be installed and notify Scott when the tank needs to be pumped. The handwashing facilities will be designed to receive potable water (treated). An on-site waste disposal system is not feasible due to the constrained available site area for gravel mining and operations because of the presence of protected Water of the United States2 on the parcel. 4.3 Section 3-301.C Specific Standards There are no defined BFE’s in the vicinity of the parcel; the effective FEMA panel covering the project area shows a Zone A floodplain, which is an unstudied approximate floodplain delineation. The 100-year flood event of the Colorado River was modeled to determine a base flood elevation and floodplain delineation. There are no proposed structures to be constructed or placed inside the modeled floodplain or floodway. 4.4 Section 3-301.D Floodway This section of the LUDC does not apply as neither the parcel nor the Project is located within the estimated extents of the floodway, Sheet 3 of Attachment A shows the floodway delineation is approximately 0.2-miles away from the northern parcel boundary at its closest approach. 2 https://www.epa.gov/wotus/about-waters-united-states Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 3 4.5 Section 3-301.E Standards for Areas of Shallow Flooding The parcel is partially covered Special Flood Hazard Area (SFHA), designated as Zone A, which is an unstudied approximate floodplain boundary. See the analysis in Section 4.2 of this narrative for SGM’s recommendation for protection against shallow inundation. 4.6 Section 3-301.F Properties Removed from the Floodplain by Fill The proposed berm and other modifications of the site have been modeled to show a no- rise of the BFE, which is detailed in the Floodplain Engineering Report (Attachment B). 4.7 Section 3-301.G Alteration of a Watercourse This section does not apply, no watercourse shall be changed with the proposed Project. 4.8 Section 3-301.H Standards for Critical Facilities This section does not apply because the proposed Project does not meet the definition of a critical facility. 5.0 Analysis of LUDC Article 4 5.1 Section 4-102 Applicability of Common Review Procedures SGM has engaged the County staff throughout the permitting process and held a specific pre-application conference meeting to address the Land Use Change and Floodplain Development Permit application. Mailed notice will be sent to neighbors (see the mailing list in Attachment C) following submittal of this application to the County. 5.2 Section 4-109.C Review Criteria of Development in the 100-year Floodplain Analysis of Section 4-109.C.1 Danger to life and property from flooding or erosion damage will be mitigated by use of the perimeter berm. Safe access to the parcel will be provided with improved paving on approximately 3,252 linear feet of County Rd 346 and a paved driveway from the county road to enter the Project site, per CDOT Access Permit #320024 (Attachment D). Analysis of Section 4-109.C.2 The perimeter berm will mitigate flooding risk and minimize danger to life and property damage inside the Project area. The berm shall be constructed at least 5-feet high with 2:1 revegetated side-slopes along the parcel’s boundary and have a footprint of at least 25-feet in width. The top-of-berm elevation is therefore no less than 1-foot above the BFE. The berm is designed to sustain the hydrodynamic forces and shear stresses exerted by the 100-year flood event and prevent inundation inside the parcel. In addition, there is no predicted significant increase in the BFE because of the Project; therefore, no adverse flooding impacts to adjacent properties will result from the proposed development (see Attachment B). Analysis of Section 4-109.C.3 The parcel is susceptible to inundation, but that risk will be mitigated with the perimeter berm (discussed above and detailed in Attachment A). Hydrodynamic parameters in the Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 4 vicinity of the Project during the 100-year storm event (100-year flood) have been modeled and are summarized in Table 2 in Attachment B. Velocities and shear stresses are expected to be less than 3 feet per second (fps) and 1 pound per square foot (psf), respectively. Under those conditions, the hydrodynamic and hydrostatic forces are considered insufficient to breach or erode the perimeter berm as designed. Predicted velocities during the 100-year flood will not be sufficient to carry materials from the parcel to neighboring and/or downstream properties. The perimeter berm is designed to withstand the hydrodynamic and hydrostatic forces of the 100-year flood and will further prevent material from being carried off-site onto other properties. Analysis of Section 4-109.C.4 The proposed use of the parcel as a gravel mining and extraction site is pending approval of a Land Use Change application by Garfield County and the adequacy of proposed uses are addressed in that application. Adjacent properties have similar uses that seem to be compatible with this development. Future development of adjacent properties with more restrictive uses is unlikely due to floodplain inundation in the vicinity. Analysis of Section 4-109.C.5 Access to the parcel from County Road 346 (CR-346) is to be developed according to CDOT Access Permit #320024, included as Attachment D. The proposed access point from CR 346 is outside of the modeled floodplain. Analysis of Section 4-109.C.6 Neither the existing nor proposed condition of the parcel will have public utilities, paved streets, bridges, or any other government services that will require repair after a flood event. On-site drinking water will be delivered, and sewerage will be collected in a vault- and-haul type of system and pumped regularly by a contracted service. Analysis of Section 4-109.C.7 The average water velocity at the site during the 100-year flood is expected to be 2.7-fps with a depth of 3.2-feet and shear stress of 0.6-psf (see Table 2 in Attachment B). Analysis of Section 4-109.C.8 Does not apply as the Parcel is not a waterfront location. Analysis of Section 4-109.C.9 There is no alternative location for mining and gravel extraction on the Parcel. The operations pad and scale-house/office are shown to be located outside of the floodplain. Analysis of Section 4-109.C.10 The parcel is located within a Residential Medium High (Res MH) area and adjacent to the Urban Growth Area for Silt, CO, according to the Garfield County 2030 Comprehensive Plan. The Res MH areas in the county are expected to be developed at a density of between 1 dwelling unit (du) per 6 acres and 1 du per 2 acres; however, due to the area around the project site being within the designated 100 -year floodplain (as shown on the future land use map) it is unlikely to be developed with residential uses. The proposed development of the parcel does not include any housing or dwelling units as the parcel will be used for gravel mining and extraction. Pending approval of the Land Use Change Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 5 application by Garfield County, the proposed development and use of the parcel will be coherent with the County’s zoning designation. 5.3 Section 4-201 Application Materials Scott has developed all required materials of a Floodplain Development Permit submittal for the proposed Rifle Pit #1 Project as Attachments A-E. 5.4 Section 4-203.O Floodplain Analysis The extent of the 100-year floodplain and floodway are clearly labeled in Attachment A. The area designated for a potential office/scale-house site, fuel storage, and other operational appurtenances labeled “Operations Area” is outside of the modeled 100-year floodplain. Watercourses and natural drainage on the Parcel will be altered by placement of the perimeter berm to prevent floodwaters from entering the Project area, as well as to prevent any material or sediment from leaving the site with storm runoff. An engineering report is included as Attachment B which certifies that the perimeter berm or any other proposed activity associated with the Project will not raise the BFE. The changes to drainage on the parcel will not negatively impact neighboring properties because the perimeter berm will prevent stormwater runoff from leaving the parcel. The wet-mining process will minimally impact the equilibrium of the water table due to evaporation and pumping water for dust suppression on-site. The Project will not result in any direct impacts to wetlands or Waters of the US as proposed (see Attachment A for extents and quantities of disturbance). 6.0 Analysis of LUDC Article 7 6.1 Section 7-203.A Minimum Setback This code section identifies the datum for the 35-foot setback to be the Typical and Ordinary High-Water Mark (TOWHM), which is not readily identifiable for wetland areas, so the proposed Project was developed assuming the extent of wetlands as being the setback datum. The wetlands on the Parcel were exhaustively studied and a detailed wetland boundary was determined by SGM though vegetation surveys and soil studies and documented in a USACE Aquatic Resource Delineation Report and Boundary Confirmation Request (Attachment E; note this report has been submitted to the US Army Corps of Engineers and is currently under review). Scott is requesting a variance from the 35-foot setback requirement for protection of water bodies and instead proposes a setback of 25-feet from the extent of wetlands. The perimeter berm, detailed in Attachment A, will be constructed outside of this 25-foot boundary and will provide a physical barrier to any wetland disturbance, given that the proposed berm has an overall width of at least 25-feet. Any mining activities associated with the Project will be effectively no less than 50 feet from any wetland areas on the parcel. 6.2 Section 7-203.B Structures Permitted in Setback The perimeter berm is a flood control structure that will be placed inside the 35 -foot setback. See Attachment A for detail drawings of the proposed perimeter berm. Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 6 6.3 Section 7-203.C Structures and Activity Prohibited in Setback No disturbance, other than construction of the perimeter berm (which is a flood control structure), is proposed within the 35-foot setback. 6.4 Section 7-203.D Compliance with State and Federal Laws The Project was developed to comply with all applicable state and federal laws and avoids all disturbance and direct impacts to wetland areas and Waters of the US. The US Army Corps of Engineers has been consulted as part of the planning phase of the Project. A permit application was submitted to the Colorado Division of Reclamation and Mine Safety (DRMS) on 04/18/22. Evaporation water losses resulting from the exposure of groundwater during gravel mining will be augmented in a Substitute Water Supply Plan approved by the Colorado Division of Water Resources (DWR) State Engineer’s Office (SEO) and can be provided to the County at their request. 7.0 Engineer’s Contact Information If you have any questions regarding the materials submitted with the Floodplain Development Permit Application for the Rifle Pit #1 project, contact Chip Fisher at (303) 746-2549 and chipf@sgm-inc.com. Sincerely, Richard (Chip) Fisher, P.E. Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 A Attachment A Engineering Drawings © 2022 Microsoft Corporation © 2022 Maxar ©CNES (2022) Distribution Airbus DS © 2022 TomTom Revision#Dwg No.Job No.Drawn by:Date:File:PE:QC:Date By: Project Milestone:Of :2019-341.002RPF04/14/2022RPFRiflePit-AdminABF1118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Scope of Work 118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Project SiteProject ContactsChris HurleyIHC-Scott, Inc. dba Scott Contracting, Inc.Chris Hurley (Legal Counsel)Permit Set (Not For Construction)April 20229200 East Mineral AveSuite #400Centennial, CO 80112Sheet IndexVicinity MapProject Engineerchurley@ihcscott.com (720) 889-4402Richard (Chip) Fisher, P.E. 57906IHC-Scott, Inc. dba Scott Contracting, Inc. 13Permit Set (Not For Construction)Rifle Pit Gravel Pit #1Title:IHC-Scott, Inc. dba Scott Contracting, Inc.Cover SheetRifle Pit Gravel Pit #1Tony Robertstroberts@ihcscott.com(303) 790-9100Richard Fisher, P.E chipf@sgm-inc.com (970) 384-9098Angie Fowler, P.E.angief@sgm-inc.com(970) 384-9027N.T.S.Alex Neesalexn@sgm-inc.com (970) 384-9004Town of SiltI-70I-70US-604/14/2022 Title:Revision#Dwg No.Job No.Drawn by:Date:File:PE:QC:Date By: Project Milestone:Of :2019-341.002RPFRPFRiflePit-NotesABF2118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com IHC-Scott, Inc. dba Scott Contracting, Inc. 13Permit Set (Not For Construction)Notes & EarthworkQuantity EstimatesRifle Pit Gravel Pit #104/14/202204/14/2022 Title:Revision#Dwg No.Job No.Drawn by:Date:File:PE:QC:Date By: Project Milestone:Of :2019-341.002RPF4.14.2022RPFRiflePit-FloodplainABF3118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Graphic ScaleIn U.S. Feet : 1" = 1000'0500 10002000IHC-Scott, Inc. dba Scott Contracting, Inc. 13Permit Set (Not For Construction)FloodplainVicinity MapRifle Pit Gravel Pit #104/14/202204/14/2022 Title:Revision#Dwg No.Job No.Drawn by:Date:File:PE:QC:Date By: Project Milestone:Of :2019-341.002RPFRPFRiflePit-ExhibitsABF4118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Graphic ScaleIn U.S. Feet : 1" = 200'0 100 200400IHC-Scott, Inc. dba Scott Contracting, Inc. 13Permit Set (Not For Construction)Existing ConditionsRifle Pit Gravel Pit #104/14/202204/14/2022 Title:Revision#Dwg No.Job No.Drawn by:Date:File:PE:QC:Date By: Project Milestone:Of :2019-341.002RPFRPFRiflePit-DesignABF5118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Graphic ScaleIn U.S. Feet : 1" = 120'0 60 120240IHC-Scott, Inc. dba Scott Contracting, Inc. 13Permit Set (Not For Construction)Reclamation PlanRifle Pit Gravel Pit #104/14/202204/14/2022 Title:Revision#Dwg No.Job No.Drawn by:Date:File:PE:QC:Date By: Project Milestone:Of :2019-341.002RPFRPFRiflePit-ExhibitsABF6118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Graphic ScaleIn U.S. Feet : 1" = 200'0 100 200400IHC-Scott, Inc. dba Scott Contracting, Inc. 13Permit Set (Not For Construction)Mining ProgressionExhibit - 30%Rifle Pit Gravel Pit #104/14/202204/14/2022 Title:Revision#Dwg No.Job No.Drawn by:Date:File:PE:QC:Date By: Project Milestone:Of :2019-341.002RPFRPFRiflePit-ExhibitsABF7118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Graphic ScaleIn U.S. Feet : 1" = 200'0 100 200400IHC-Scott, Inc. dba Scott Contracting, Inc. 13Permit Set (Not For Construction)Mining ProgressionExhibit - 60%Rifle Pit Gravel Pit #104/14/202204/14/2022 Title:Revision#Dwg No.Job No.Drawn by:Date:File:PE:QC:Date By: Project Milestone:Of :2019-341.002RPFRPFRiflePit-ExhibitsABF8118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Graphic ScaleIn U.S. Feet : 1" = 200'0 100 200400IHC-Scott, Inc. dba Scott Contracting, Inc. 13Permit Set (Not For Construction)Mining ProgressionExhibit - 100%Rifle Pit Gravel Pit #104/14/202204/14/2022 Title:Revision#Dwg No.Job No.Drawn by:Date:File:PE:QC:Date By: Project Milestone:Of :2019-341.002RPFRPFRiflePit-DesignABF9118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Graphic ScaleIn U.S. Feet : 1" = 120'0 60 120240IHC-Scott, Inc. dba Scott Contracting, Inc. 13Permit Set (Not For Construction)Erosion Control PlanRifle Pit Gravel Pit #104/14/202204/14/2022 Title:Revision#Dwg No.Job No.Drawn by:Date:File:PE:QC:Date By: Project Milestone:Of :2019-341.002RPF04/14/2022RPFRiflePit-DetailsABF10118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com IHC-Scott, Inc. dba Scott Contracting, Inc. 13Permit Set (Not For Construction)Erosion Control DetailsRifle Pit Gravel Pit #1 04/14/2022 Title:Revision#Dwg No.Job No.Drawn by:Date:File:PE:QC:Date By: Project Milestone:Of :2019-341.002RPF4.14.2022RPFRiflePit-DetailsABF11118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com IHC-Scott, Inc. dba Scott Contracting, Inc. 13Permit Set (Not For Construction)Typical Mineral StrataRifle Pit Gravel Pit #104/14/202204/14/2022 Title:Revision#Dwg No.Job No.Drawn by:Date:File:PE:QC:Date By: Project Milestone:Of :2019-341.002RPFRPFRiflePit-DetailsABF12118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com IHC-Scott, Inc. dba Scott Contracting, Inc. 13Permit Set (Not For Construction)Typical GravelProcessing LayoutRifle Pit Gravel Pit #104/14/202204/14/2022 Title:Revision#Dwg No.Job No.Drawn by:Date:File:PE:QC:Date By: Project Milestone:Of :2019-341.002RPFRPFRiflePit-DetailsABF13118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com IHC-Scott, Inc. dba Scott Contracting, Inc. 13Permit Set (Not For Construction)Spill Prevention Control& Containment (SPCC)DetailRifle Pit Gravel Pit #104/14/202204/14/2022 Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 B Attachment B Floodplain Engineering Report HEC-RAS Plan: Existing2 River: Colorado River Reach: Site 1 Profile: PF 1 Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl (cfs) (ft) (ft) (ft) (ft)(ft/ft) (ft/s) (sq ft) (ft) Site 1 30902.14 PF 1 34900.0 5404.0 5412.3 5412.5 0.0 4.99 14256.0 2639.3 0.31 Site 1 29650.64 PF 1 34900.0 5400.0 5409.4 5406.4 5410.7 0.0 9.17 3806.1 431.7 0.54 Site 1 29500 Bridge Site 1 29427.62 PF 1 34900.0 5400.0 5406.2 5406.2 5409.1 0.0 13.76 2536.7 435.3 1.00 Site 1 27494.84 PF 1 34900.0 5394.0 5400.4 5400.8 0.0 5.83 9099.6 1989.1 0.42 Site 1 26255.61 PF 1 34900.0 5390.5 5397.1 5397.8 0.0 7.92 7603.5 2397.0 0.60 Site 1 25219.46 PF 1 34900.0 5388.0 5393.1 5393.6 0.0 7.78 8065.2 2482.7 0.64 Site 1 24101.01 PF 1 34900.0 5384.0 5389.9 5390.2 0.0 5.54 10742.4 3287.2 0.45 Site 1 22688.22 PF 1 34900.0 5380.8 5385.4 5385.8 0.0 6.93 11072.7 4549.1 0.63 Site 1 20730.67 PF 1 34900.0 5374.9 5379.1 5379.3 0.0 5.19 11372.2 3465.4 0.49 Site 1 19398.23 PF 1 34900.0 5372.0 5375.5 5375.7 0.0 4.14 13616.5 4038.0 0.43 Site 1 17708.26 PF 1 34900.0 5366.0 5371.8 5372.0 0.0 4.90 10922.9 2547.9 0.44 Site 1 15834.35 PF 1 34900.0 5361.9 5365.6 5366.1 0.0 5.93 6972.2 2816.5 0.61 Site 1 13915.69 PF 1 34900.0 5353.8 5359.6 5358.1 5359.9 0.0 4.86 8147.4 2500.3 0.44 Floodplain Engineering Report - Appendix A May 2022 Plan: Existing2 Colorado River Site 1 RS: 30902.14 Profile: PF 1 E.G. Elev (ft)5412.53 Element Left OB Channel Right OB Vel Head (ft)0.19 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5412.34 Reach Len. (ft)1356.00 1251.50 946.00 Crit W.S. (ft) Flow Area (sq ft)7438.50 2950.46 3866.98 E.G. Slope (ft/ft) 0.000837 Area (sq ft)7438.50 2950.46 3866.98 Q Total (cfs)34900.00 Flow (cfs)13152.40 14721.71 7025.89 Top Width (ft)2639.26 Top Width (ft)1521.88 360.17 757.21 Vel Total (ft/s)2.45 Avg. Vel. (ft/s)1.77 4.99 1.82 Max Chl Dpth (ft)8.34 Hydr. Depth (ft)4.89 8.19 5.11 Conv. Total (cfs) 1206009.0 Conv. (cfs)454496.1 508725.5 242787.5 Length Wtd. (ft)1240.44 Wetted Per. (ft)1523.23 360.49 760.21 Min Ch El (ft)5404.00 Shear (lb/sq ft)0.26 0.43 0.27 Alpha 2.06 Stream Power (lb/ft s)0.45 2.14 0.48 Frctn Loss (ft)1.69 Cum Volume (acre-ft) 2259.83 1241.74 88.17 C & E Loss (ft)0.11 Cum SA (acres)748.32 300.04 20.11 Plan: Existing2 Colorado River Site 1 RS: 29650.64 Profile: PF 1 E.G. Elev (ft)5410.73 Element Left OB Channel Right OB Vel Head (ft)1.31 Wt. n-Val. 0.035 W.S. Elev (ft)5409.43 Reach Len. (ft)10.00 10.00 10.00 Crit W.S. (ft)5406.35 Flow Area (sq ft) 3806.14 E.G. Slope (ft/ft) 0.002587 Area (sq ft) 3806.14 Q Total (cfs)34900.00 Flow (cfs) 34900.00 Top Width (ft)431.69 Top Width (ft) 431.69 Vel Total (ft/s)9.17 Avg. Vel. (ft/s) 9.17 Max Chl Dpth (ft)9.42 Hydr. Depth (ft) 8.82 Conv. Total (cfs) 686135.0 Conv. (cfs) 686135.0 Length Wtd. (ft)10.00 Wetted Per. (ft) 435.00 Min Ch El (ft)5400.00 Shear (lb/sq ft) 1.41 Alpha 1.00 Stream Power (lb/ft s) 12.96 Frctn Loss (ft)0.03 Cum Volume (acre-ft) 2144.05 1144.68 46.18 C & E Loss (ft)0.05 Cum SA (acres)724.64 288.67 11.89 Plan: Existing2 Colorado River Site 1 RS: 29500 BR U Profile: PF 1 E.G. Elev (ft)5410.65 Element Left OB Channel Right OB Vel Head (ft)1.47 Wt. n-Val. 0.035 W.S. Elev (ft)5409.19 Reach Len. (ft)195.00 195.00 195.00 Crit W.S. (ft)5406.53 Flow Area (sq ft) 3593.16 E.G. Slope (ft/ft) 0.003544 Area (sq ft) 3593.16 Q Total (cfs)34900.00 Flow (cfs) 34900.00 Top Width (ft)418.62 Top Width (ft) 418.62 Vel Total (ft/s)9.71 Avg. Vel. (ft/s) 9.71 Max Chl Dpth (ft)9.19 Hydr. Depth (ft) 8.58 Conv. Total (cfs) 586246.7 Conv. (cfs) 586246.7 Length Wtd. (ft)195.00 Wetted Per. (ft) 476.94 Min Ch El (ft)5400.00 Shear (lb/sq ft) 1.67 Alpha 1.00 Stream Power (lb/ft s) 16.19 Frctn Loss (ft)0.93 Cum Volume (acre-ft) 2144.05 1143.83 46.18 C & E Loss (ft)0.21 Cum SA (acres)724.64 288.57 11.89 Floodplain Engineering Report - Appendix A May 2022 Plan: Existing2 Colorado River Site 1 RS: 29500 BR D Profile: PF 1 E.G. Elev (ft)5409.51 Element Left OB Channel Right OB Vel Head (ft)2.16 Wt. n-Val. 0.070 0.035 W.S. Elev (ft)5407.36 Reach Len. (ft)18.02 18.02 18.02 Crit W.S. (ft)5406.34 Flow Area (sq ft)2.21 2963.34 E.G. Slope (ft/ft) 0.006786 Area (sq ft)2.21 2963.34 Q Total (cfs)34900.00 Flow (cfs)0.77 34899.23 Top Width (ft)461.64 Top Width (ft)28.22 433.42 Vel Total (ft/s)11.77 Avg. Vel. (ft/s)0.35 11.78 Max Chl Dpth (ft)7.36 Hydr. Depth (ft)0.08 6.84 Conv. Total (cfs) 423673.1 Conv. (cfs)9.3 423663.8 Length Wtd. (ft)18.02 Wetted Per. (ft)28.41 479.53 Min Ch El (ft)5400.00 Shear (lb/sq ft)0.03 2.62 Alpha 1.00 Stream Power (lb/ft s)0.01 30.83 Frctn Loss (ft)0.15 Cum Volume (acre-ft) 2144.04 1129.16 46.18 C & E Loss (ft)0.24 Cum SA (acres)724.57 286.66 11.89 Plan: Existing2 Colorado River Site 1 RS: 29427.62 Profile: PF 1 E.G. Elev (ft)5409.13 Element Left OB Channel Right OB Vel Head (ft)2.94 Wt. n-Val. 0.035 W.S. Elev (ft)5406.19 Reach Len. (ft)1192.00 1932.78 2126.00 Crit W.S. (ft)5406.19 Flow Area (sq ft) 2536.74 E.G. Slope (ft/ft) 0.010064 Area (sq ft) 2536.74 Q Total (cfs)34900.00 Flow (cfs) 34900.00 Top Width (ft)435.26 Top Width (ft) 435.26 Vel Total (ft/s)13.76 Avg. Vel. (ft/s) 13.76 Max Chl Dpth (ft)6.19 Hydr. Depth (ft) 5.83 Conv. Total (cfs) 347881.4 Conv. (cfs) 347881.4 Length Wtd. (ft) 1821.69 Wetted Per. (ft) 436.95 Min Ch El (ft)5400.00 Shear (lb/sq ft) 3.65 Alpha 1.00 Stream Power (lb/ft s) 50.18 Frctn Loss (ft)6.26 Cum Volume (acre-ft) 2144.04 1128.02 46.18 C & E Loss (ft)1.28 Cum SA (acres)724.57 286.48 11.89 Plan: Existing2 Colorado River Site 1 RS: 27494.84 Profile: PF 1 E.G. Elev (ft)5400.76 Element Left OB Channel Right OB Vel Head (ft)0.39 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5400.37 Reach Len. (ft)1158.00 1239.23 1263.00 Crit W.S. (ft) Flow Area (sq ft)4894.15 4186.94 18.54 E.G. Slope (ft/ft) 0.001716 Area (sq ft)4894.15 4186.94 18.54 Q Total (cfs)34900.00 Flow (cfs)10474.15 24399.92 25.93 Top Width (ft)1989.06 Top Width (ft)1287.26 693.72 8.08 Vel Total (ft/s)3.84 Avg. Vel. (ft/s)2.14 5.83 1.40 Max Chl Dpth (ft)6.46 Hydr. Depth (ft)3.80 6.04 2.29 Conv. Total (cfs) 842407.4 Conv. (cfs)252822.3 588959.2 625.9 Length Wtd. (ft) 1214.79 Wetted Per. (ft)1289.19 694.23 9.24 Min Ch El (ft)5394.00 Shear (lb/sq ft)0.41 0.65 0.21 Alpha 1.71 Stream Power (lb/ft s)0.87 3.77 0.30 Frctn Loss (ft)2.92 Cum Volume (acre-ft) 2077.08 978.85 45.72 C & E Loss (ft)0.03 Cum SA (acres)706.95 261.44 11.69 Floodplain Engineering Report - Appendix A May 2022 Plan: Existing2 Colorado River Site 1 RS: 26255.61 Profile: PF 1 E.G. Elev (ft)5397.81 Element Left OB Channel Right OB Vel Head (ft)0.71 Wt. n-Val. 0.070 0.035 W.S. Elev (ft)5397.10 Reach Len. (ft)1050.00 1036.15 981.00 Crit W.S. (ft) Flow Area (sq ft)4528.64 3074.86 E.G. Slope (ft/ft) 0.003607 Area (sq ft)4528.64 3074.86 Q Total (cfs)34900.00 Flow (cfs)10531.85 24368.15 Top Width (ft)2397.04 Top Width (ft)1836.69 560.35 Vel Total (ft/s)4.59 Avg. Vel. (ft/s)2.33 7.92 Max Chl Dpth (ft)6.57 Hydr. Depth (ft)2.47 5.49 Conv. Total (cfs) 581124.2 Conv. (cfs)175367.1 405757.1 Length Wtd. (ft) 1035.04 Wetted Per. (ft)1837.99 561.12 Min Ch El (ft)5390.53 Shear (lb/sq ft)0.55 1.23 Alpha 2.16 Stream Power (lb/ft s)1.29 9.78 Frctn Loss (ft)4.11 Cum Volume (acre-ft) 1951.83 875.56 45.46 C & E Loss (ft)0.05 Cum SA (acres)665.43 243.60 11.57 Plan: Existing2 Colorado River Site 1 RS: 25219.46 Profile: PF 1 E.G. Elev (ft)5393.65 Element Left OB Channel Right OB Vel Head (ft)0.53 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5393.12 Reach Len. (ft)1167.00 1118.45 1053.00 Crit W.S. (ft) Flow Area (sq ft)3974.24 2161.75 1929.18 E.G. Slope (ft/ft) 0.004389 Area (sq ft)3974.24 2161.75 1929.18 Q Total (cfs)34900.00 Flow (cfs)11213.86 16815.01 6871.13 Top Width (ft)2482.74 Top Width (ft)1534.97 469.76 478.00 Vel Total (ft/s)4.33 Avg. Vel. (ft/s)2.82 7.78 3.56 Max Chl Dpth (ft)7.12 Hydr. Depth (ft)2.59 4.60 4.04 Conv. Total (cfs) 526778.8 Conv. (cfs)169261.4 253804.9 103712.5 Length Wtd. (ft) 1129.41 Wetted Per. (ft)1536.54 470.06 478.67 Min Ch El (ft)5388.00 Shear (lb/sq ft)0.71 1.26 1.10 Alpha 1.83 Stream Power (lb/ft s)2.00 9.80 3.93 Frctn Loss (ft)3.42 Cum Volume (acre-ft) 1849.35 813.28 23.73 C & E Loss (ft)0.07 Cum SA (acres)624.79 231.35 6.19 Plan: Existing2 Colorado River Site 1 RS: 24101.01 Profile: PF 1 E.G. Elev (ft)5390.16 Element Left OB Channel Right OB Vel Head (ft)0.31 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5389.85 Reach Len. (ft)1473.00 1412.79 1111.00 Crit W.S. (ft) Flow Area (sq ft)6932.86 3805.82 3.76 E.G. Slope (ft/ft) 0.002215 Area (sq ft)6932.86 3805.82 3.76 Q Total (cfs)34900.00 Flow (cfs)13813.37 21083.22 3.42 Top Width (ft)3287.24 Top Width (ft)2460.70 822.80 3.74 Vel Total (ft/s)3.25 Avg. Vel. (ft/s)1.99 5.54 0.91 Max Chl Dpth (ft)6.10 Hydr. Depth (ft)2.82 4.63 1.01 Conv. Total (cfs) 741518.9 Conv. (cfs)293492.1 447954.2 72.6 Length Wtd. (ft) 1444.68 Wetted Per. (ft)2461.74 824.44 4.33 Min Ch El (ft)5383.97 Shear (lb/sq ft)0.39 0.64 0.12 Alpha 1.91 Stream Power (lb/ft s)0.78 3.54 0.11 Frctn Loss (ft)4.42 Cum Volume (acre-ft) 1703.25 736.66 0.37 C & E Loss (ft)0.00 Cum SA (acres)571.27 214.75 0.37 Floodplain Engineering Report - Appendix A May 2022 Plan: Existing2 Colorado River Site 1 RS: 22688.22 Profile: PF 1 E.G. Elev (ft)5385.75 Element Left OB Channel Right OB Vel Head (ft)0.31 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5385.44 Reach Len. (ft)1763.00 1957.55 2135.00 Crit W.S. (ft) Flow Area (sq ft)9381.75 1689.59 1.40 E.G. Slope (ft/ft) 0.004503 Area (sq ft)9381.75 1689.59 1.40 Q Total (cfs)34900.00 Flow (cfs)23183.79 11714.82 1.40 Top Width (ft)4549.10 Top Width (ft)4103.38 444.13 1.59 Vel Total (ft/s)3.15 Avg. Vel. (ft/s)2.47 6.93 1.00 Max Chl Dpth (ft)5.44 Hydr. Depth (ft)2.29 3.80 0.88 Conv. Total (cfs) 520111.4 Conv. (cfs)345505.8 174584.8 20.9 Length Wtd. (ft) 1819.93 Wetted Per. (ft)4105.57 444.97 2.37 Min Ch El (ft)5380.75 Shear (lb/sq ft)0.64 1.07 0.17 Alpha 2.03 Stream Power (lb/ft s)1.59 7.40 0.17 Frctn Loss (ft)6.43 Cum Volume (acre-ft) 1427.41 647.55 0.30 C & E Loss (ft)0.04 Cum SA (acres)460.29 194.21 0.30 Plan: Existing2 Colorado River Site 1 RS: 20730.67 Profile: PF 1 E.G. Elev (ft)5379.29 Element Left OB Channel Right OB Vel Head (ft)0.19 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5379.10 Reach Len. (ft)1430.00 1332.44 1200.00 Crit W.S. (ft) Flow Area (sq ft)9692.43 1678.11 1.66 E.G. Slope (ft/ft) 0.002843 Area (sq ft)9692.43 1678.11 1.66 Q Total (cfs)34900.00 Flow (cfs)26195.08 8703.58 1.34 Top Width (ft)3465.37 Top Width (ft)2979.13 483.75 2.48 Vel Total (ft/s)3.07 Avg. Vel. (ft/s)2.70 5.19 0.81 Max Chl Dpth (ft)7.10 Hydr. Depth (ft)3.25 3.47 0.67 Conv. Total (cfs) 654494.4 Conv. (cfs)491247.3 163221.9 25.1 Length Wtd. (ft) 1407.83 Wetted Per. (ft)2981.29 483.92 2.76 Min Ch El (ft)5374.88 Shear (lb/sq ft)0.58 0.62 0.11 Alpha 1.29 Stream Power (lb/ft s)1.56 3.19 0.09 Frctn Loss (ft)3.60 Cum Volume (acre-ft) 1041.41 571.88 0.23 C & E Loss (ft)0.02 Cum SA (acres)316.96 173.36 0.20 Plan: Existing2 Colorado River Site 1 RS: 19398.23 Profile: PF 1 E.G. Elev (ft)5375.67 Element Left OB Channel Right OB Vel Head (ft)0.12 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5375.54 Reach Len. (ft)1603.00 1689.97 1773.00 Crit W.S. (ft) Flow Area (sq ft)11887.98 1726.70 1.83 E.G. Slope (ft/ft) 0.002315 Area (sq ft)11887.98 1726.70 1.83 Q Total (cfs)34900.00 Flow (cfs)27747.05 7151.50 1.46 Top Width (ft)4038.04 Top Width (ft)3438.84 597.33 1.87 Vel Total (ft/s)2.56 Avg. Vel. (ft/s)2.33 4.14 0.80 Max Chl Dpth (ft)7.57 Hydr. Depth (ft)3.46 2.89 0.98 Conv. Total (cfs) 725334.6 Conv. (cfs)576673.2 148631.1 30.3 Length Wtd. (ft) 1627.88 Wetted Per. (ft)3443.19 598.09 2.66 Min Ch El (ft)5372.00 Shear (lb/sq ft)0.50 0.42 0.10 Alpha 1.19 Stream Power (lb/ft s)1.16 1.73 0.08 Frctn Loss (ft)3.64 Cum Volume (acre-ft) 687.19 519.80 0.18 C & E Loss (ft)0.01 Cum SA (acres)211.62 156.83 0.14 Floodplain Engineering Report - Appendix A May 2022 Plan: Existing2 Colorado River Site 1 RS: 17708.26 Profile: PF 1 E.G. Elev (ft)5372.02 Element Left OB Channel Right OB Vel Head (ft)0.21 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5371.81 Reach Len. (ft)2036.00 1873.91 2008.00 Crit W.S. (ft) Flow Area (sq ft)8307.43 2613.22 2.28 E.G. Slope (ft/ft) 0.002164 Area (sq ft)8307.43 2613.22 2.28 Q Total (cfs)34900.00 Flow (cfs)22085.83 12812.57 1.60 Top Width (ft)2547.92 Top Width (ft)1878.96 667.70 1.26 Vel Total (ft/s)3.20 Avg. Vel. (ft/s)2.66 4.90 0.70 Max Chl Dpth (ft)7.78 Hydr. Depth (ft)4.42 3.91 1.81 Conv. Total (cfs) 750235.0 Conv. (cfs)474772.6 275428.0 34.4 Length Wtd. (ft) 1932.91 Wetted Per. (ft)1880.55 668.06 3.82 Min Ch El (ft)5366.00 Shear (lb/sq ft)0.60 0.53 0.08 Alpha 1.30 Stream Power (lb/ft s)1.59 2.59 0.06 Frctn Loss (ft)5.89 Cum Volume (acre-ft) 315.59 435.62 0.10 C & E Loss (ft)0.03 Cum SA (acres)113.77 132.29 0.07 Plan: Existing2 Colorado River Site 1 RS: 15834.35 Profile: PF 1 E.G. Elev (ft)5366.10 Element Left OB Channel Right OB Vel Head (ft)0.50 Wt. n-Val. 0.070 0.035 W.S. Elev (ft)5365.60 Reach Len. (ft)2339.00 1918.66 1085.00 Crit W.S. (ft) Flow Area (sq ft)1642.86 5329.35 E.G. Slope (ft/ft) 0.004607 Area (sq ft)1642.86 5329.35 Q Total (cfs)34900.00 Flow (cfs)3321.21 31578.79 Top Width (ft)2816.48 Top Width (ft)1011.20 1805.29 Vel Total (ft/s)5.01 Avg. Vel. (ft/s)2.02 5.93 Max Chl Dpth (ft)3.69 Hydr. Depth (ft)1.62 2.95 Conv. Total (cfs) 514208.8 Conv. (cfs)48934.0 465274.9 Length Wtd. (ft) 1952.79 Wetted Per. (ft)1011.76 1807.23 Min Ch El (ft)5361.91 Shear (lb/sq ft)0.47 0.85 Alpha 1.28 Stream Power (lb/ft s)0.94 5.03 Frctn Loss (ft)6.10 Cum Volume (acre-ft)83.05 264.78 0.04 C & E Loss (ft)0.05 Cum SA (acres)46.23 79.09 0.05 Plan: Existing2 Colorado River Site 1 RS: 13915.69 Profile: PF 1 E.G. Elev (ft)5359.95 Element Left OB Channel Right OB Vel Head (ft)0.35 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5359.60 Reach Len. (ft) Crit W.S. (ft)5358.08 Flow Area (sq ft)1450.64 6693.24 3.56 E.G. Slope (ft/ft) 0.002255 Area (sq ft)1450.64 6693.24 3.56 Q Total (cfs)34900.00 Flow (cfs)2353.24 32543.53 3.23 Top Width (ft)2500.29 Top Width (ft)710.56 1786.08 3.65 Vel Total (ft/s)4.28 Avg. Vel. (ft/s)1.62 4.86 0.91 Max Chl Dpth (ft)5.85 Hydr. Depth (ft)2.04 3.75 0.98 Conv. Total (cfs) 734918.6 Conv. (cfs)49554.1 685296.4 68.1 Length Wtd. (ft) Wetted Per. (ft)710.60 1787.16 4.16 Min Ch El (ft)5353.75 Shear (lb/sq ft)0.29 0.53 0.12 Alpha 1.21 Stream Power (lb/ft s)0.47 2.56 0.11 Frctn Loss (ft) Cum Volume (acre-ft) C & E Loss (ft) Cum SA (acres) Floodplain Engineering Report - Appendix A May 2022 0 500 1000 1500 2000 2500 3000 3500 5404 5406 5408 5410 5412 5414 5416 5418 5420 5422 Colorado River Plan: Existing2 5/14/2020 RS = 30902.14 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 0 200 400 600 800 1000 1200 1400 5400 5402 5404 5406 5408 5410 5412 5414 5416 Colorado River Plan: Existing2 5/14/2020 RS = 29650.64 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Crit PF 1 Ground Bank Sta .07 .035 .07 Floodplain Engineering Report - Appendix A May 2022 0 200 400 600 800 1000 1200 1400 5400 5405 5410 5415 5420 Colorado River Plan: Existing2 5/14/2020 RS = 29500 BR I-70 Bridge over Colorado River Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Crit PF 1 Ground Bank Sta .07 .035 .07 0 200 400 600 800 1000 1200 1400 5400 5402 5404 5406 5408 5410 5412 5414 5416 5418 Colorado River Plan: Existing2 5/14/2020 RS = 29500 BR I-70 Bridge over Colorado River Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Crit PF 1 Ground Bank Sta .07 .035 .07 Floodplain Engineering Report - Appendix A May 2022 0 200 400 600 800 1000 1200 1400 5400 5402 5404 5406 5408 5410 5412 5414 Colorado River Plan: Existing2 5/14/2020 RS = 29427.62 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Crit PF 1 Ground Bank Sta .07 .035 .07 0 500 1000 1500 2000 2500 5390 5400 5410 5420 5430 5440 5450 Colorado River Plan: Existing2 5/14/2020 RS = 27494.84 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 Floodplain Engineering Report - Appendix A May 2022 0 500 1000 1500 2000 2500 3000 3500 5390 5400 5410 5420 5430 5440 Colorado River Plan: Existing2 5/14/2020 RS = 26255.61 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 0 1000 2000 3000 4000 5380 5390 5400 5410 5420 5430 Colorado River Plan: Existing2 5/14/2020 RS = 25219.46 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 Floodplain Engineering Report - Appendix A May 2022 0 1000 2000 3000 4000 5000 5380 5390 5400 5410 5420 5430 Colorado River Plan: Existing2 5/14/2020 RS = 24101.01 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 0 1000 2000 3000 4000 5000 6000 5380 5390 5400 5410 5420 5430 Colorado River Plan: Existing2 5/14/2020 RS = 22688.22 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 Floodplain Engineering Report - Appendix A May 2022 0 1000 2000 3000 4000 5000 6000 5370 5380 5390 5400 5410 5420 5430 5440 Colorado River Plan: Existing2 5/14/2020 RS = 20730.67 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 0 1000 2000 3000 4000 5000 6000 7000 5360 5370 5380 5390 5400 5410 5420 5430 Colorado River Plan: Existing2 5/14/2020 RS = 19398.23 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 Floodplain Engineering Report - Appendix A May 2022 0 1000 2000 3000 4000 5000 6000 7000 5350 5360 5370 5380 5390 5400 5410 5420 5430 Colorado River Plan: Existing2 5/14/2020 RS = 17708.26 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 0 1000 2000 3000 4000 5000 5360 5365 5370 5375 5380 5385 Colorado River Plan: Existing2 5/14/2020 RS = 15834.35 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 . 0 7 Floodplain Engineering Report - Appendix A May 2022 0 1000 2000 3000 4000 5350 5355 5360 5365 5370 5375 5380 5385 5390 Colorado River Plan: Existing2 5/14/2020 RS = 13915.69 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Crit PF 1 Ground Bank Sta .07 .035 . 0 7 Floodplain Engineering Report - Appendix A May 2022 HEC-RAS Plan: Proposed2 River: Colorado River Reach: Site 1 Profile: PF 1 Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl (cfs) (ft) (ft) (ft) (ft)(ft/ft) (ft/s) (sq ft) (ft) Site 1 30902.14 PF 1 34900.0 5404.0 5412.3 5412.5 0.0 5.00 14244.1 2641.0 0.31 Site 1 29650.64 PF 1 34900.0 5400.0 5409.4 5406.4 5410.7 0.0 9.17 3806.1 431.7 0.54 Site 1 29500 Bridge Site 1 29427.62 PF 1 34900.0 5400.0 5406.2 5406.2 5409.1 0.0 13.75 2538.0 435.3 1.00 Site 1 27494.84 PF 1 34900.0 5394.0 5400.4 5400.8 0.0 5.85 9057.0 1988.9 0.42 Site 1 26255.61 PF 1 34900.0 5390.5 5397.1 5397.8 0.0 7.93 7604.5 2396.3 0.60 Site 1 25219.46 PF 1 34900.0 5388.0 5393.1 5393.6 0.0 7.80 8060.1 2481.8 0.64 Site 1 24101.01 PF 1 34900.0 5384.0 5389.9 5390.2 0.0 5.53 10767.1 3290.2 0.45 Site 1 22688.22 PF 1 34900.0 5380.8 5385.4 5385.8 0.0 6.95 10118.4 3654.6 0.63 Site 1 20730.67 PF 1 34900.0 5374.9 5379.1 5379.3 0.0 5.18 11396.7 3505.0 0.49 Site 1 19398.23 PF 1 34900.0 5372.0 5375.5 5375.6 0.0 4.12 13583.7 4022.9 0.43 Site 1 17708.26 PF 1 34900.0 5366.0 5371.8 5372.0 0.0 4.87 10968.8 2550.1 0.43 Site 1 15834.35 PF 1 34900.0 5361.9 5365.6 5366.1 0.0 5.93 6965.2 2814.3 0.61 Site 1 13915.69 PF 1 34900.0 5353.7 5359.6 5358.1 5359.9 0.0 4.86 8149.5 2491.9 0.44 Floodplain Engineering Report - Appendix A May 2022 Plan: Proposed2 Colorado River Site 1 RS: 30902.14 Profile: PF 1 E.G. Elev (ft)5412.53 Element Left OB Channel Right OB Vel Head (ft)0.19 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5412.34 Reach Len. (ft)1356.00 1251.50 946.00 Crit W.S. (ft) Flow Area (sq ft)7426.19 2950.85 3867.08 E.G. Slope (ft/ft) 0.000840 Area (sq ft)7426.19 2950.85 3867.08 Q Total (cfs)34900.00 Flow (cfs)13121.90 14743.20 7034.90 Top Width (ft)2641.05 Top Width (ft)1523.66 360.17 757.21 Vel Total (ft/s)2.45 Avg. Vel. (ft/s)1.77 5.00 1.82 Max Chl Dpth (ft)8.34 Hydr. Depth (ft)4.87 8.19 5.11 Conv. Total (cfs) 1204513.0 Conv. (cfs)452879.5 508836.0 242797.4 Length Wtd. (ft)1240.36 Wetted Per. (ft)1525.06 360.49 760.22 Min Ch El (ft)5404.00 Shear (lb/sq ft)0.26 0.43 0.27 Alpha 2.06 Stream Power (lb/ft s)0.45 2.14 0.49 Frctn Loss (ft)1.69 Cum Volume (acre-ft) 2226.64 1240.44 87.86 C & E Loss (ft)0.11 Cum SA (acres)715.85 300.03 20.12 Plan: Proposed2 Colorado River Site 1 RS: 29650.64 Profile: PF 1 E.G. Elev (ft)5410.73 Element Left OB Channel Right OB Vel Head (ft)1.31 Wt. n-Val. 0.035 W.S. Elev (ft)5409.43 Reach Len. (ft)10.00 10.00 10.00 Crit W.S. (ft)5406.35 Flow Area (sq ft) 3806.14 E.G. Slope (ft/ft) 0.002587 Area (sq ft) 3806.14 Q Total (cfs)34900.00 Flow (cfs) 34900.00 Top Width (ft)431.69 Top Width (ft) 431.69 Vel Total (ft/s)9.17 Avg. Vel. (ft/s) 9.17 Max Chl Dpth (ft)9.42 Hydr. Depth (ft) 8.82 Conv. Total (cfs) 686135.0 Conv. (cfs) 686135.0 Length Wtd. (ft)10.00 Wetted Per. (ft) 435.00 Min Ch El (ft)5400.00 Shear (lb/sq ft) 1.41 Alpha 1.00 Stream Power (lb/ft s) 12.96 Frctn Loss (ft)0.03 Cum Volume (acre-ft) 2111.05 1143.37 45.87 C & E Loss (ft)0.05 Cum SA (acres)692.14 288.66 11.90 Plan: Proposed2 Colorado River Site 1 RS: 29500 BR U Profile: PF 1 E.G. Elev (ft)5410.65 Element Left OB Channel Right OB Vel Head (ft)1.47 Wt. n-Val. 0.035 W.S. Elev (ft)5409.19 Reach Len. (ft)195.00 195.00 195.00 Crit W.S. (ft)5406.53 Flow Area (sq ft) 3593.16 E.G. Slope (ft/ft) 0.003544 Area (sq ft) 3593.16 Q Total (cfs)34900.00 Flow (cfs) 34900.00 Top Width (ft)418.62 Top Width (ft) 418.62 Vel Total (ft/s)9.71 Avg. Vel. (ft/s) 9.71 Max Chl Dpth (ft)9.19 Hydr. Depth (ft) 8.58 Conv. Total (cfs) 586246.7 Conv. (cfs) 586246.7 Length Wtd. (ft)195.00 Wetted Per. (ft) 476.94 Min Ch El (ft)5400.00 Shear (lb/sq ft) 1.67 Alpha 1.00 Stream Power (lb/ft s) 16.19 Frctn Loss (ft)0.93 Cum Volume (acre-ft) 2111.05 1142.52 45.87 C & E Loss (ft)0.21 Cum SA (acres)692.14 288.56 11.90 Floodplain Engineering Report - Appendix A May 2022 Plan: Proposed2 Colorado River Site 1 RS: 29500 BR D Profile: PF 1 E.G. Elev (ft)5409.51 Element Left OB Channel Right OB Vel Head (ft)2.16 Wt. n-Val. 0.070 0.035 W.S. Elev (ft)5407.36 Reach Len. (ft)18.02 18.02 18.02 Crit W.S. (ft)5406.34 Flow Area (sq ft)2.10 2961.65 E.G. Slope (ft/ft) 0.006797 Area (sq ft)2.10 2961.65 Q Total (cfs)34900.00 Flow (cfs)0.72 34899.28 Top Width (ft)460.53 Top Width (ft)27.15 433.38 Vel Total (ft/s)11.78 Avg. Vel. (ft/s)0.34 11.78 Max Chl Dpth (ft)7.35 Hydr. Depth (ft)0.08 6.83 Conv. Total (cfs) 423303.0 Conv. (cfs)8.8 423294.2 Length Wtd. (ft)18.02 Wetted Per. (ft)27.34 479.47 Min Ch El (ft)5400.00 Shear (lb/sq ft)0.03 2.62 Alpha 1.00 Stream Power (lb/ft s)0.01 30.89 Frctn Loss (ft)0.15 Cum Volume (acre-ft) 2111.05 1127.85 45.87 C & E Loss (ft)0.23 Cum SA (acres)692.08 286.65 11.90 Plan: Proposed2 Colorado River Site 1 RS: 29427.62 Profile: PF 1 E.G. Elev (ft)5409.13 Element Left OB Channel Right OB Vel Head (ft)2.94 Wt. n-Val. 0.035 W.S. Elev (ft)5406.19 Reach Len. (ft)1192.00 1932.78 2126.00 Crit W.S. (ft)5406.19 Flow Area (sq ft) 2538.02 E.G. Slope (ft/ft) 0.010048 Area (sq ft) 2538.02 Q Total (cfs)34900.00 Flow (cfs) 34900.00 Top Width (ft)435.29 Top Width (ft) 435.29 Vel Total (ft/s)13.75 Avg. Vel. (ft/s) 13.75 Max Chl Dpth (ft)6.19 Hydr. Depth (ft) 5.83 Conv. Total (cfs) 348159.0 Conv. (cfs) 348159.0 Length Wtd. (ft) 1822.27 Wetted Per. (ft) 436.98 Min Ch El (ft)5400.00 Shear (lb/sq ft) 3.64 Alpha 1.00 Stream Power (lb/ft s) 50.10 Frctn Loss (ft)6.32 Cum Volume (acre-ft) 2111.05 1126.71 45.87 C & E Loss (ft)1.27 Cum SA (acres)692.07 286.47 11.90 Plan: Proposed2 Colorado River Site 1 RS: 27494.84 Profile: PF 1 E.G. Elev (ft)5400.76 Element Left OB Channel Right OB Vel Head (ft)0.39 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5400.36 Reach Len. (ft)1158.00 1239.23 1263.00 Crit W.S. (ft) Flow Area (sq ft)4861.16 4177.35 18.47 E.G. Slope (ft/ft) 0.001737 Area (sq ft)4861.16 4177.35 18.47 Q Total (cfs)34900.00 Flow (cfs)10420.06 24453.99 25.95 Top Width (ft)1988.92 Top Width (ft)1287.13 693.72 8.07 Vel Total (ft/s)3.85 Avg. Vel. (ft/s)2.14 5.85 1.41 Max Chl Dpth (ft)6.45 Hydr. Depth (ft)3.78 6.02 2.29 Conv. Total (cfs) 837333.6 Conv. (cfs)250001.9 586709.1 622.6 Length Wtd. (ft) 1214.72 Wetted Per. (ft)1289.08 694.24 9.23 Min Ch El (ft)5394.00 Shear (lb/sq ft)0.41 0.65 0.22 Alpha 1.71 Stream Power (lb/ft s)0.88 3.82 0.30 Frctn Loss (ft)2.95 Cum Volume (acre-ft) 2044.53 977.73 45.42 C & E Loss (ft)0.03 Cum SA (acres)674.46 261.42 11.70 Floodplain Engineering Report - Appendix A May 2022 Plan: Proposed2 Colorado River Site 1 RS: 26255.61 Profile: PF 1 E.G. Elev (ft)5397.78 Element Left OB Channel Right OB Vel Head (ft)0.71 Wt. n-Val. 0.070 0.035 W.S. Elev (ft)5397.07 Reach Len. (ft)1050.00 1036.15 981.00 Crit W.S. (ft) Flow Area (sq ft)4547.55 3056.94 E.G. Slope (ft/ft) 0.003637 Area (sq ft)4547.55 3056.94 Q Total (cfs)34900.00 Flow (cfs)10650.84 24249.15 Top Width (ft)2396.30 Top Width (ft)1836.46 559.84 Vel Total (ft/s)4.59 Avg. Vel. (ft/s)2.34 7.93 Max Chl Dpth (ft)6.54 Hydr. Depth (ft)2.48 5.46 Conv. Total (cfs) 578683.9 Conv. (cfs)176603.8 402080.1 Length Wtd. (ft) 1035.12 Wetted Per. (ft)1837.77 560.58 Min Ch El (ft)5390.53 Shear (lb/sq ft)0.56 1.24 Alpha 2.16 Stream Power (lb/ft s)1.32 9.82 Frctn Loss (ft)4.10 Cum Volume (acre-ft) 1919.47 874.83 45.16 C & E Loss (ft)0.05 Cum SA (acres)632.94 243.59 11.58 Plan: Proposed2 Colorado River Site 1 RS: 25219.46 Profile: PF 1 E.G. Elev (ft)5393.63 Element Left OB Channel Right OB Vel Head (ft)0.54 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5393.09 Reach Len. (ft)1167.00 1118.45 1053.00 Crit W.S. (ft) Flow Area (sq ft)3947.71 2196.65 1915.77 E.G. Slope (ft/ft) 0.004325 Area (sq ft)3947.71 2196.65 1915.77 Q Total (cfs)34900.00 Flow (cfs)11015.23 17142.44 6742.32 Top Width (ft)2481.76 Top Width (ft)1534.07 469.76 477.93 Vel Total (ft/s)4.33 Avg. Vel. (ft/s)2.79 7.80 3.52 Max Chl Dpth (ft)7.09 Hydr. Depth (ft)2.57 4.68 4.01 Conv. Total (cfs) 530694.1 Conv. (cfs)167499.1 260670.3 102524.6 Length Wtd. (ft) 1129.40 Wetted Per. (ft)1535.65 470.06 478.59 Min Ch El (ft)5388.00 Shear (lb/sq ft)0.69 1.26 1.08 Alpha 1.85 Stream Power (lb/ft s)1.94 9.85 3.80 Frctn Loss (ft)3.39 Cum Volume (acre-ft) 1817.09 812.35 23.58 C & E Loss (ft)0.07 Cum SA (acres)592.32 231.35 6.20 Plan: Proposed2 Colorado River Site 1 RS: 24101.01 Profile: PF 1 E.G. Elev (ft)5390.18 Element Left OB Channel Right OB Vel Head (ft)0.31 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5389.86 Reach Len. (ft)1473.00 1412.79 1111.00 Crit W.S. (ft) Flow Area (sq ft)6950.58 3812.73 3.74 E.G. Slope (ft/ft) 0.002201 Area (sq ft)6950.58 3812.73 3.74 Q Total (cfs)34900.00 Flow (cfs)13817.05 21079.60 3.36 Top Width (ft)3290.17 Top Width (ft)2463.58 822.80 3.79 Vel Total (ft/s)3.24 Avg. Vel. (ft/s)1.99 5.53 0.90 Max Chl Dpth (ft)6.11 Hydr. Depth (ft)2.82 4.63 0.99 Conv. Total (cfs) 743889.4 Conv. (cfs)294508.8 449309.1 71.5 Length Wtd. (ft) 1444.67 Wetted Per. (ft)2464.64 824.45 4.37 Min Ch El (ft)5383.97 Shear (lb/sq ft)0.39 0.64 0.12 Alpha 1.91 Stream Power (lb/ft s)0.77 3.51 0.11 Frctn Loss (ft)4.42 Cum Volume (acre-ft) 1671.10 735.20 0.38 C & E Loss (ft)0.00 Cum SA (acres)538.77 214.75 0.38 Floodplain Engineering Report - Appendix A May 2022 Plan: Proposed2 Colorado River Site 1 RS: 22688.22 Profile: PF 1 E.G. Elev (ft)5385.76 Element Left OB Channel Right OB Vel Head (ft)0.33 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5385.43 Reach Len. (ft)1763.00 1957.55 2135.00 Crit W.S. (ft) Flow Area (sq ft)8428.58 1688.44 1.39 E.G. Slope (ft/ft) 0.004527 Area (sq ft)8428.58 1688.44 1.39 Q Total (cfs)34900.00 Flow (cfs)23165.64 11732.96 1.40 Top Width (ft)3654.56 Top Width (ft)3208.84 444.13 1.59 Vel Total (ft/s)3.45 Avg. Vel. (ft/s)2.75 6.95 1.00 Max Chl Dpth (ft)5.43 Hydr. Depth (ft)2.63 3.80 0.88 Conv. Total (cfs) 518707.7 Conv. (cfs)344303.6 174383.3 20.8 Length Wtd. (ft) 1819.93 Wetted Per. (ft)3211.26 444.98 2.37 Min Ch El (ft)5380.75 Shear (lb/sq ft)0.74 1.07 0.17 Alpha 1.79 Stream Power (lb/ft s)2.04 7.45 0.17 Frctn Loss (ft)6.45 Cum Volume (acre-ft) 1411.07 645.99 0.32 C & E Loss (ft)0.04 Cum SA (acres)442.86 194.21 0.31 Plan: Proposed2 Colorado River Site 1 RS: 20730.67 Profile: PF 1 E.G. Elev (ft)5379.28 Element Left OB Channel Right OB Vel Head (ft)0.19 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5379.09 Reach Len. (ft)1430.00 1332.44 1200.00 Crit W.S. (ft) Flow Area (sq ft)9719.50 1675.51 1.65 E.G. Slope (ft/ft) 0.002846 Area (sq ft)9719.50 1675.51 1.65 Q Total (cfs)34900.00 Flow (cfs)26213.27 8685.40 1.33 Top Width (ft)3504.97 Top Width (ft)3018.75 483.75 2.47 Vel Total (ft/s)3.06 Avg. Vel. (ft/s)2.70 5.18 0.80 Max Chl Dpth (ft)7.09 Hydr. Depth (ft)3.22 3.46 0.67 Conv. Total (cfs) 654172.5 Conv. (cfs)491346.7 162800.9 24.9 Length Wtd. (ft) 1408.01 Wetted Per. (ft)3020.93 483.92 2.75 Min Ch El (ft)5374.88 Shear (lb/sq ft)0.57 0.62 0.11 Alpha 1.30 Stream Power (lb/ft s)1.54 3.19 0.09 Frctn Loss (ft)3.62 Cum Volume (acre-ft) 1043.82 570.40 0.24 C & E Loss (ft)0.02 Cum SA (acres)316.84 173.36 0.21 Plan: Proposed2 Colorado River Site 1 RS: 19398.23 Profile: PF 1 E.G. Elev (ft)5375.64 Element Left OB Channel Right OB Vel Head (ft)0.12 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5375.52 Reach Len. (ft)1603.00 1689.97 1773.00 Crit W.S. (ft) Flow Area (sq ft)11874.22 1707.57 1.89 E.G. Slope (ft/ft) 0.002331 Area (sq ft)11874.22 1707.57 1.89 Q Total (cfs)34900.00 Flow (cfs)27854.81 7043.63 1.56 Top Width (ft)4022.93 Top Width (ft)3423.81 597.33 1.80 Vel Total (ft/s)2.57 Avg. Vel. (ft/s)2.35 4.12 0.83 Max Chl Dpth (ft)7.52 Hydr. Depth (ft)3.47 2.86 1.05 Conv. Total (cfs) 722901.5 Conv. (cfs)576970.9 145898.2 32.4 Length Wtd. (ft) 1627.56 Wetted Per. (ft)3428.90 598.09 2.61 Min Ch El (ft)5372.00 Shear (lb/sq ft)0.50 0.42 0.11 Alpha 1.19 Stream Power (lb/ft s)1.18 1.71 0.09 Frctn Loss (ft)3.64 Cum Volume (acre-ft) 689.38 518.66 0.19 C & E Loss (ft)0.01 Cum SA (acres)211.09 156.82 0.15 Floodplain Engineering Report - Appendix A May 2022 Plan: Proposed2 Colorado River Site 1 RS: 17708.26 Profile: PF 1 E.G. Elev (ft)5372.00 Element Left OB Channel Right OB Vel Head (ft)0.20 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5371.79 Reach Len. (ft)2036.00 1873.91 2008.00 Crit W.S. (ft) Flow Area (sq ft)8365.50 2600.77 2.55 E.G. Slope (ft/ft) 0.002147 Area (sq ft)8365.50 2600.77 2.55 Q Total (cfs)34900.00 Flow (cfs)22240.87 12657.13 2.01 Top Width (ft)2550.15 Top Width (ft)1880.85 667.70 1.60 Vel Total (ft/s)3.18 Avg. Vel. (ft/s)2.66 4.87 0.79 Max Chl Dpth (ft)7.76 Hydr. Depth (ft)4.45 3.90 1.60 Conv. Total (cfs) 753201.6 Conv. (cfs)479995.9 273162.4 43.4 Length Wtd. (ft) 1933.27 Wetted Per. (ft)1882.43 668.37 3.57 Min Ch El (ft)5366.00 Shear (lb/sq ft)0.60 0.52 0.10 Alpha 1.29 Stream Power (lb/ft s)1.58 2.54 0.08 Frctn Loss (ft)5.87 Cum Volume (acre-ft) 316.97 435.08 0.10 C & E Loss (ft)0.03 Cum SA (acres)113.48 132.29 0.08 Plan: Proposed2 Colorado River Site 1 RS: 15834.35 Profile: PF 1 E.G. Elev (ft)5366.09 Element Left OB Channel Right OB Vel Head (ft)0.50 Wt. n-Val. 0.070 0.035 W.S. Elev (ft)5365.59 Reach Len. (ft)2339.00 1918.66 1085.00 Crit W.S. (ft) Flow Area (sq ft)1639.42 5325.82 E.G. Slope (ft/ft) 0.004618 Area (sq ft)1639.42 5325.82 Q Total (cfs)34900.00 Flow (cfs)3317.93 31582.07 Top Width (ft)2814.33 Top Width (ft)1009.07 1805.27 Vel Total (ft/s)5.01 Avg. Vel. (ft/s)2.02 5.93 Max Chl Dpth (ft)3.68 Hydr. Depth (ft)1.62 2.95 Conv. Total (cfs) 513590.6 Conv. (cfs)48826.9 464763.8 Length Wtd. (ft) 1953.00 Wetted Per. (ft)1009.63 1807.21 Min Ch El (ft)5361.91 Shear (lb/sq ft)0.47 0.85 Alpha 1.28 Stream Power (lb/ft s)0.95 5.04 Frctn Loss (ft)6.10 Cum Volume (acre-ft)83.15 264.59 0.04 C & E Loss (ft)0.05 Cum SA (acres)45.94 79.09 0.05 Plan: Proposed2 Colorado River Site 1 RS: 13915.69 Profile: PF 1 E.G. Elev (ft)5359.94 Element Left OB Channel Right OB Vel Head (ft)0.34 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5359.60 Reach Len. (ft) Crit W.S. (ft)5358.10 Flow Area (sq ft)1457.74 6688.19 3.55 E.G. Slope (ft/ft) 0.002255 Area (sq ft)1457.74 6688.19 3.55 Q Total (cfs)34900.00 Flow (cfs)2391.44 32505.35 3.22 Top Width (ft)2491.92 Top Width (ft)702.19 1786.08 3.64 Vel Total (ft/s)4.28 Avg. Vel. (ft/s)1.64 4.86 0.91 Max Chl Dpth (ft)5.91 Hydr. Depth (ft)2.08 3.74 0.97 Conv. Total (cfs) 734863.5 Conv. (cfs)50354.7 684441.1 67.7 Length Wtd. (ft) Wetted Per. (ft)702.24 1787.14 4.16 Min Ch El (ft)5353.69 Shear (lb/sq ft)0.29 0.53 0.12 Alpha 1.21 Stream Power (lb/ft s)0.48 2.56 0.11 Frctn Loss (ft) Cum Volume (acre-ft) C & E Loss (ft) Cum SA (acres) Floodplain Engineering Report - Appendix A May 2022 0 500 1000 1500 2000 2500 3000 3500 5404 5406 5408 5410 5412 5414 5416 5418 5420 5422 Colorado River Plan: Proposed2 5/14/2020 RS = 30902.14 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 0 200 400 600 800 1000 1200 1400 5400 5402 5404 5406 5408 5410 5412 5414 5416 Colorado River Plan: Proposed2 5/14/2020 RS = 29650.64 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Crit PF 1 Ground Bank Sta .07 .035 .07 Floodplain Engineering Report - Appendix A May 2022 0 200 400 600 800 1000 1200 1400 5400 5405 5410 5415 5420 Colorado River Plan: Proposed2 5/14/2020 RS = 29500 BR I-70 Bridge over Colorado River Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Crit PF 1 Ground Bank Sta .07 .035 .07 0 200 400 600 800 1000 1200 1400 5400 5402 5404 5406 5408 5410 5412 5414 5416 5418 Colorado River Plan: Proposed2 5/14/2020 RS = 29500 BR I-70 Bridge over Colorado River Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Crit PF 1 Ground Bank Sta .07 .035 .07 Floodplain Engineering Report - Appendix A May 2022 0 200 400 600 800 1000 1200 1400 5400 5402 5404 5406 5408 5410 5412 5414 Colorado River Plan: Proposed2 5/14/2020 RS = 29427.62 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Crit PF 1 Ground Bank Sta .07 .035 .07 0 500 1000 1500 2000 2500 5390 5400 5410 5420 5430 5440 5450 Colorado River Plan: Proposed2 5/14/2020 RS = 27494.84 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 Floodplain Engineering Report - Appendix A May 2022 0 500 1000 1500 2000 2500 3000 3500 5390 5400 5410 5420 5430 5440 Colorado River Plan: Proposed2 5/14/2020 RS = 26255.61 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 0 1000 2000 3000 4000 5380 5390 5400 5410 5420 5430 Colorado River Plan: Proposed2 5/14/2020 RS = 25219.46 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 Floodplain Engineering Report - Appendix A May 2022 0 1000 2000 3000 4000 5000 5380 5390 5400 5410 5420 5430 Colorado River Plan: Proposed2 5/14/2020 RS = 24101.01 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 0 1000 2000 3000 4000 5000 6000 5350 5360 5370 5380 5390 5400 5410 5420 5430 Colorado River Plan: Proposed2 5/14/2020 RS = 22688.22 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 Floodplain Engineering Report - Appendix A May 2022 0 1000 2000 3000 4000 5000 6000 5340 5360 5380 5400 5420 5440 Colorado River Plan: Proposed2 5/14/2020 RS = 20730.67 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 0 1000 2000 3000 4000 5000 6000 7000 5360 5370 5380 5390 5400 5410 5420 5430 Colorado River Plan: Proposed2 5/14/2020 RS = 19398.23 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 Floodplain Engineering Report - Appendix A May 2022 0 1000 2000 3000 4000 5000 6000 7000 5350 5360 5370 5380 5390 5400 5410 5420 5430 Colorado River Plan: Proposed2 5/14/2020 RS = 17708.26 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 .07 0 1000 2000 3000 4000 5000 5360 5365 5370 5375 5380 5385 Colorado River Plan: Proposed2 5/14/2020 RS = 15834.35 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Ground Bank Sta .07 .035 . 0 7 Floodplain Engineering Report - Appendix A May 2022 0 1000 2000 3000 4000 5350 5355 5360 5365 5370 5375 5380 5385 5390 Colorado River Plan: Proposed2 5/14/2020 RS = 13915.69 Station (ft)Elevation (ft)Legend EG PF 1 WS PF 1 Crit PF 1 Ground Bank Sta .07 .035 . 0 7 Floodplain Engineering Report - Appendix A May 2022 HEC-RAS Plan: FwayM1 River: Colorado River Reach: Site 1 Reach River Sta Profile W.S. Elev Prof Delta WS E.G. Elev Top Wdth Act Q Left Q Channel Q Right Enc Sta L Ch Sta L Ch Sta R Enc Sta R (ft) (ft) (ft) (ft)(cfs) (cfs) (cfs) (ft)(ft)(ft)(ft) Site 1 30902.14 PF 1 5412.34 5412.53 2641.05 13121.90 14743.20 7034.90 1956.95 2317.12 Site 1 30902.14 PF 2 5412.85 0.50 5413.58 824.33 8160.65 24671.19 2068.16 1597.59 1956.95 2317.12 2421.92 Site 1 29650.64 PF 1 5409.43 5410.73 431.69 34900.00 336.82 798.40 Site 1 29650.64 PF 2 5409.42 0.00 5410.73 431.69 34900.00 326.82 336.82 798.40 808.41 Site 1 29500 BR U PF 1 5409.19 5410.65 418.62 34900.00 336.82 798.40 Site 1 29500 BR U PF 2 5409.19 0.00 5410.65 418.62 34900.00 326.82 336.82 798.40 808.41 Site 1 29500 BR D PF 1 5407.36 5409.51 461.09 0.75 34899.26 366.90 982.50 Site 1 29500 BR D PF 2 5407.36 0.00 5409.51 433.40 34900.00 356.90 366.90 982.50 992.50 Site 1 29427.62 PF 1 5406.19 5409.13 435.29 34900.00 366.90 982.50 Site 1 29427.62 PF 2 5406.19 0.00 5409.13 435.29 34900.00 356.90 366.90 982.50 992.50 Site 1 27494.84 PF 1 5400.36 5400.76 1988.92 10420.06 24453.99 25.95 1401.12 2094.84 Site 1 27494.84 PF 2 5400.86 0.50 5401.32 1371.76 7679.25 27187.41 33.34 731.93 1401.12 2094.84 2104.84 Site 1 26255.61 PF 1 5397.07 5397.78 2396.30 10650.84 24249.15 1974.18 2547.44 Site 1 26255.61 PF 2 5397.57 0.50 5398.42 1590.65 7356.71 27543.29 950.92 1974.18 2547.44 2557.44 Site 1 25219.46 PF 1 5393.09 5393.63 2481.76 11015.23 17142.44 6742.32 2483.80 2953.56 Site 1 25219.46 PF 2 5393.37 0.28 5394.10 1761.84 12335.27 19989.61 2575.12 1391.78 2483.80 2953.56 3153.62 Site 1 24101.01 PF 1 5389.86 5390.18 3290.17 13817.05 21079.60 3.36 3158.24 3981.04 Site 1 24101.01 PF 2 5390.36 0.50 5390.71 2391.96 11523.21 23375.09 1.70 1590.08 3158.24 3981.04 3982.04 Site 1 22688.22 PF 1 5385.43 5385.76 3654.56 23165.64 11732.96 1.40 4559.40 5003.53 Site 1 22688.22 PF 2 5385.94 0.50 5386.45 2603.56 19643.42 15253.69 2.90 2402.02 4559.40 5003.53 5018.53 Site 1 20730.67 PF 1 5379.09 5379.28 3504.97 26213.27 8685.40 1.33 4964.81 5448.56 Site 1 20730.67 PF 2 5379.59 0.50 5379.85 2135.99 24443.68 10453.36 2.96 3270.79 4964.81 5448.56 5510.56 Site 1 19398.23 PF 1 5375.52 5375.64 4022.92 27855.12 7043.32 1.56 5386.70 5984.03 Site 1 19398.23 PF 2 5376.02 0.50 5376.19 2931.68 26189.41 8710.59 3012.35 5386.70 5984.03 5944.03 Site 1 17708.26 PF 1 5371.79 5372.00 2550.16 22240.22 12657.77 2.01 5073.60 5741.30 Site 1 17708.26 PF 2 5372.30 0.50 5372.53 2153.90 19964.22 14932.92 2.86 3589.25 5073.60 5741.30 5751.30 Site 1 15834.35 PF 1 5365.59 5366.09 2814.29 3317.35 31582.65 3062.93 4872.42 Site 1 15834.35 PF 2 5365.49 -0.10 5366.21 1810.39 1.50 34898.50 3052.93 3062.93 4872.42 4882.42 Site 1 13915.69 PF 1 5359.60 5359.94 2492.14 2392.54 32504.24 3.22 1945.13 3731.21 Site 1 13915.69 PF 2 5360.10 0.50 5360.43 1800.91 26.48 34868.43 5.09 1935.13 1945.13 3731.21 3741.21 Floodplain Engineering Report - Appendix A May 2022 Plan: FwayM1 Colorado River Site 1 RS: 30902.14 Profile: PF 1 E.G. Elev (ft)5412.53 Element Left OB Channel Right OB Vel Head (ft)0.19 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5412.34 Reach Len. (ft)1356.00 1251.50 946.00 Crit W.S. (ft) Flow Area (sq ft)7426.19 2950.85 3867.08 E.G. Slope (ft/ft) 0.000840 Area (sq ft)7426.19 2950.85 3867.08 Q Total (cfs)34900.00 Flow (cfs)13121.90 14743.20 7034.90 Top Width (ft)2641.05 Top Width (ft)1523.66 360.17 757.21 Vel Total (ft/s)2.45 Avg. Vel. (ft/s)1.77 5.00 1.82 Max Chl Dpth (ft)8.34 Hydr. Depth (ft)4.87 8.19 5.11 Conv. Total (cfs) 1204513.0 Conv. (cfs)452879.5 508836.0 242797.4 Length Wtd. (ft)1240.36 Wetted Per. (ft)1525.06 360.49 760.22 Min Ch El (ft)5404.00 Shear (lb/sq ft)0.26 0.43 0.27 Alpha 2.06 Stream Power (lb/ft s)0.45 2.14 0.49 Frctn Loss (ft)1.69 Cum Volume (acre-ft) 2226.71 1240.51 87.86 C & E Loss (ft)0.11 Cum SA (acres)715.86 300.03 20.12 Plan: FwayM1 Colorado River Site 1 RS: 29650.64 Profile: PF 1 E.G. Elev (ft)5410.73 Element Left OB Channel Right OB Vel Head (ft)1.31 Wt. n-Val. 0.035 W.S. Elev (ft)5409.43 Reach Len. (ft)10.00 10.00 10.00 Crit W.S. (ft)5406.35 Flow Area (sq ft) 3806.14 E.G. Slope (ft/ft) 0.002587 Area (sq ft) 3806.14 Q Total (cfs)34900.00 Flow (cfs) 34900.00 Top Width (ft)431.69 Top Width (ft) 431.69 Vel Total (ft/s)9.17 Avg. Vel. (ft/s) 9.17 Max Chl Dpth (ft)9.42 Hydr. Depth (ft) 8.82 Conv. Total (cfs) 686135.0 Conv. (cfs) 686135.0 Length Wtd. (ft)10.00 Wetted Per. (ft) 435.00 Min Ch El (ft)5400.00 Shear (lb/sq ft) 1.41 Alpha 1.00 Stream Power (lb/ft s) 12.96 Frctn Loss (ft)0.03 Cum Volume (acre-ft) 2111.12 1143.44 45.87 C & E Loss (ft)0.05 Cum SA (acres)692.14 288.66 11.90 Plan: FwayM1 Colorado River Site 1 RS: 29500 BR U Profile: PF 1 E.G. Elev (ft)5410.65 Element Left OB Channel Right OB Vel Head (ft)1.47 Wt. n-Val. 0.035 W.S. Elev (ft)5409.19 Reach Len. (ft)195.00 195.00 195.00 Crit W.S. (ft)5406.53 Flow Area (sq ft) 3593.37 E.G. Slope (ft/ft) 0.003543 Area (sq ft) 3593.37 Q Total (cfs)34900.00 Flow (cfs) 34900.00 Top Width (ft)418.62 Top Width (ft) 418.62 Vel Total (ft/s)9.71 Avg. Vel. (ft/s) 9.71 Max Chl Dpth (ft)9.19 Hydr. Depth (ft) 8.58 Conv. Total (cfs) 586297.9 Conv. (cfs) 586297.9 Length Wtd. (ft)195.00 Wetted Per. (ft) 476.94 Min Ch El (ft)5400.00 Shear (lb/sq ft) 1.67 Alpha 1.00 Stream Power (lb/ft s) 16.19 Frctn Loss (ft)0.93 Cum Volume (acre-ft) 2111.12 1142.59 45.87 C & E Loss (ft)0.21 Cum SA (acres)692.14 288.56 11.90 Floodplain Engineering Report - Appendix A May 2022 Plan: FwayM1 Colorado River Site 1 RS: 29500 BR D Profile: PF 1 E.G. Elev (ft)5409.51 Element Left OB Channel Right OB Vel Head (ft)2.16 Wt. n-Val. 0.070 0.035 W.S. Elev (ft)5407.36 Reach Len. (ft)18.02 18.02 18.02 Crit W.S. (ft)5406.35 Flow Area (sq ft)2.15 2962.49 E.G. Slope (ft/ft) 0.006792 Area (sq ft)2.15 2962.49 Q Total (cfs)34900.00 Flow (cfs)0.75 34899.26 Top Width (ft)461.09 Top Width (ft)27.69 433.40 Vel Total (ft/s)11.77 Avg. Vel. (ft/s)0.35 11.78 Max Chl Dpth (ft)7.36 Hydr. Depth (ft)0.08 6.84 Conv. Total (cfs) 423488.1 Conv. (cfs)9.0 423479.0 Length Wtd. (ft)18.02 Wetted Per. (ft)27.87 479.50 Min Ch El (ft)5400.00 Shear (lb/sq ft)0.03 2.62 Alpha 1.00 Stream Power (lb/ft s)0.01 30.86 Frctn Loss (ft)0.15 Cum Volume (acre-ft) 2111.12 1127.92 45.87 C & E Loss (ft)0.23 Cum SA (acres)692.08 286.65 11.90 Plan: FwayM1 Colorado River Site 1 RS: 29427.62 Profile: PF 1 E.G. Elev (ft)5409.13 Element Left OB Channel Right OB Vel Head (ft)2.94 Wt. n-Val. 0.035 W.S. Elev (ft)5406.19 Reach Len. (ft)1192.00 1932.78 2126.00 Crit W.S. (ft)5406.19 Flow Area (sq ft) 2538.02 E.G. Slope (ft/ft) 0.010048 Area (sq ft) 2538.02 Q Total (cfs)34900.00 Flow (cfs) 34900.00 Top Width (ft)435.29 Top Width (ft) 435.29 Vel Total (ft/s)13.75 Avg. Vel. (ft/s) 13.75 Max Chl Dpth (ft)6.19 Hydr. Depth (ft) 5.83 Conv. Total (cfs) 348159.0 Conv. (cfs) 348159.0 Length Wtd. (ft) 1822.27 Wetted Per. (ft) 436.98 Min Ch El (ft)5400.00 Shear (lb/sq ft) 3.64 Alpha 1.00 Stream Power (lb/ft s) 50.10 Frctn Loss (ft)6.32 Cum Volume (acre-ft) 2111.11 1126.78 45.87 C & E Loss (ft)1.27 Cum SA (acres)692.07 286.47 11.90 Plan: FwayM1 Colorado River Site 1 RS: 27494.84 Profile: PF 1 E.G. Elev (ft)5400.76 Element Left OB Channel Right OB Vel Head (ft)0.39 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5400.36 Reach Len. (ft)1158.00 1239.23 1263.00 Crit W.S. (ft) Flow Area (sq ft)4861.16 4177.35 18.47 E.G. Slope (ft/ft) 0.001737 Area (sq ft)4861.16 4177.35 18.47 Q Total (cfs)34900.00 Flow (cfs)10420.06 24453.99 25.95 Top Width (ft)1988.92 Top Width (ft)1287.13 693.72 8.07 Vel Total (ft/s)3.85 Avg. Vel. (ft/s)2.14 5.85 1.41 Max Chl Dpth (ft)6.45 Hydr. Depth (ft)3.78 6.02 2.29 Conv. Total (cfs) 837333.6 Conv. (cfs)250001.9 586709.1 622.6 Length Wtd. (ft) 1214.72 Wetted Per. (ft)1289.08 694.24 9.23 Min Ch El (ft)5394.00 Shear (lb/sq ft)0.41 0.65 0.22 Alpha 1.71 Stream Power (lb/ft s)0.88 3.82 0.30 Frctn Loss (ft)2.95 Cum Volume (acre-ft) 2044.60 977.80 45.42 C & E Loss (ft)0.03 Cum SA (acres)674.46 261.42 11.70 Floodplain Engineering Report - Appendix A May 2022 Plan: FwayM1 Colorado River Site 1 RS: 26255.61 Profile: PF 1 E.G. Elev (ft)5397.78 Element Left OB Channel Right OB Vel Head (ft)0.71 Wt. n-Val. 0.070 0.035 W.S. Elev (ft)5397.07 Reach Len. (ft)1050.00 1036.15 981.00 Crit W.S. (ft) Flow Area (sq ft)4547.55 3056.94 E.G. Slope (ft/ft) 0.003637 Area (sq ft)4547.55 3056.94 Q Total (cfs)34900.00 Flow (cfs)10650.84 24249.15 Top Width (ft)2396.30 Top Width (ft)1836.46 559.84 Vel Total (ft/s)4.59 Avg. Vel. (ft/s)2.34 7.93 Max Chl Dpth (ft)6.54 Hydr. Depth (ft)2.48 5.46 Conv. Total (cfs) 578683.9 Conv. (cfs)176603.8 402080.1 Length Wtd. (ft) 1035.12 Wetted Per. (ft)1837.77 560.58 Min Ch El (ft)5390.53 Shear (lb/sq ft)0.56 1.24 Alpha 2.16 Stream Power (lb/ft s)1.32 9.82 Frctn Loss (ft)4.10 Cum Volume (acre-ft) 1919.54 874.90 45.16 C & E Loss (ft)0.05 Cum SA (acres)632.94 243.59 11.58 Plan: FwayM1 Colorado River Site 1 RS: 25219.46 Profile: PF 1 E.G. Elev (ft)5393.63 Element Left OB Channel Right OB Vel Head (ft)0.54 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5393.09 Reach Len. (ft)1167.00 1118.45 1053.00 Crit W.S. (ft) Flow Area (sq ft)3947.71 2196.65 1915.77 E.G. Slope (ft/ft) 0.004325 Area (sq ft)3947.71 2196.65 1915.77 Q Total (cfs)34900.00 Flow (cfs)11015.23 17142.44 6742.32 Top Width (ft)2481.76 Top Width (ft)1534.07 469.76 477.93 Vel Total (ft/s)4.33 Avg. Vel. (ft/s)2.79 7.80 3.52 Max Chl Dpth (ft)7.09 Hydr. Depth (ft)2.57 4.68 4.01 Conv. Total (cfs) 530694.1 Conv. (cfs)167499.1 260670.3 102524.6 Length Wtd. (ft) 1129.40 Wetted Per. (ft)1535.65 470.06 478.59 Min Ch El (ft)5388.00 Shear (lb/sq ft)0.69 1.26 1.08 Alpha 1.85 Stream Power (lb/ft s)1.94 9.85 3.80 Frctn Loss (ft)3.39 Cum Volume (acre-ft) 1817.15 812.41 23.58 C & E Loss (ft)0.07 Cum SA (acres)592.32 231.35 6.20 Plan: FwayM1 Colorado River Site 1 RS: 24101.01 Profile: PF 1 E.G. Elev (ft)5390.18 Element Left OB Channel Right OB Vel Head (ft)0.31 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5389.86 Reach Len. (ft)1473.00 1412.79 1111.00 Crit W.S. (ft) Flow Area (sq ft)6950.58 3812.73 3.74 E.G. Slope (ft/ft) 0.002201 Area (sq ft)6950.58 3812.73 3.74 Q Total (cfs)34900.00 Flow (cfs)13817.05 21079.60 3.36 Top Width (ft)3290.17 Top Width (ft)2463.58 822.80 3.79 Vel Total (ft/s)3.24 Avg. Vel. (ft/s)1.99 5.53 0.90 Max Chl Dpth (ft)6.11 Hydr. Depth (ft)2.82 4.63 0.99 Conv. Total (cfs) 743889.4 Conv. (cfs)294508.8 449309.1 71.5 Length Wtd. (ft) 1444.67 Wetted Per. (ft)2464.64 824.45 4.37 Min Ch El (ft)5383.97 Shear (lb/sq ft)0.39 0.64 0.12 Alpha 1.91 Stream Power (lb/ft s)0.77 3.51 0.11 Frctn Loss (ft)4.42 Cum Volume (acre-ft) 1671.17 735.26 0.38 C & E Loss (ft)0.00 Cum SA (acres)538.77 214.75 0.38 Floodplain Engineering Report - Appendix A May 2022 Plan: FwayM1 Colorado River Site 1 RS: 22688.22 Profile: PF 1 E.G. Elev (ft)5385.76 Element Left OB Channel Right OB Vel Head (ft)0.33 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5385.43 Reach Len. (ft)1763.00 1957.55 2135.00 Crit W.S. (ft) Flow Area (sq ft)8428.58 1688.44 1.39 E.G. Slope (ft/ft) 0.004527 Area (sq ft)8428.58 1688.44 1.39 Q Total (cfs)34900.00 Flow (cfs)23165.64 11732.96 1.40 Top Width (ft)3654.56 Top Width (ft)3208.84 444.13 1.59 Vel Total (ft/s)3.45 Avg. Vel. (ft/s)2.75 6.95 1.00 Max Chl Dpth (ft)5.43 Hydr. Depth (ft)2.63 3.80 0.88 Conv. Total (cfs) 518707.7 Conv. (cfs)344303.6 174383.3 20.8 Length Wtd. (ft) 1819.93 Wetted Per. (ft)3211.26 444.98 2.37 Min Ch El (ft)5380.75 Shear (lb/sq ft)0.74 1.07 0.17 Alpha 1.79 Stream Power (lb/ft s)2.04 7.45 0.17 Frctn Loss (ft)6.45 Cum Volume (acre-ft) 1411.14 646.05 0.32 C & E Loss (ft)0.04 Cum SA (acres)442.86 194.21 0.31 Plan: FwayM1 Colorado River Site 1 RS: 20730.67 Profile: PF 1 E.G. Elev (ft)5379.28 Element Left OB Channel Right OB Vel Head (ft)0.19 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5379.09 Reach Len. (ft)1430.00 1332.44 1200.00 Crit W.S. (ft) Flow Area (sq ft)9719.50 1675.51 1.65 E.G. Slope (ft/ft) 0.002846 Area (sq ft)9719.50 1675.51 1.65 Q Total (cfs)34900.00 Flow (cfs)26213.27 8685.40 1.33 Top Width (ft)3504.97 Top Width (ft)3018.75 483.75 2.47 Vel Total (ft/s)3.06 Avg. Vel. (ft/s)2.70 5.18 0.80 Max Chl Dpth (ft)7.09 Hydr. Depth (ft)3.22 3.46 0.67 Conv. Total (cfs) 654172.5 Conv. (cfs)491346.7 162800.9 24.9 Length Wtd. (ft) 1408.01 Wetted Per. (ft)3020.93 483.92 2.75 Min Ch El (ft)5374.88 Shear (lb/sq ft)0.57 0.62 0.11 Alpha 1.30 Stream Power (lb/ft s)1.54 3.19 0.09 Frctn Loss (ft)3.62 Cum Volume (acre-ft) 1043.89 570.47 0.24 C & E Loss (ft)0.02 Cum SA (acres)316.84 173.36 0.21 Plan: FwayM1 Colorado River Site 1 RS: 19398.23 Profile: PF 1 E.G. Elev (ft)5375.64 Element Left OB Channel Right OB Vel Head (ft)0.12 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5375.52 Reach Len. (ft)1603.00 1689.97 1773.00 Crit W.S. (ft) Flow Area (sq ft)11872.55 1707.28 1.89 E.G. Slope (ft/ft) 0.002332 Area (sq ft)11872.55 1707.28 1.89 Q Total (cfs)34900.00 Flow (cfs)27855.12 7043.32 1.56 Top Width (ft)4022.92 Top Width (ft)3423.79 597.33 1.80 Vel Total (ft/s)2.57 Avg. Vel. (ft/s)2.35 4.13 0.83 Max Chl Dpth (ft)7.52 Hydr. Depth (ft)3.47 2.86 1.05 Conv. Total (cfs) 722726.4 Conv. (cfs)576837.4 145856.6 32.3 Length Wtd. (ft) 1627.56 Wetted Per. (ft)3428.88 598.09 2.61 Min Ch El (ft)5372.00 Shear (lb/sq ft)0.50 0.42 0.11 Alpha 1.19 Stream Power (lb/ft s)1.18 1.71 0.09 Frctn Loss (ft)3.64 Cum Volume (acre-ft) 689.47 518.73 0.19 C & E Loss (ft)0.01 Cum SA (acres)211.09 156.82 0.15 Floodplain Engineering Report - Appendix A May 2022 Plan: FwayM1 Colorado River Site 1 RS: 17708.26 Profile: PF 1 E.G. Elev (ft)5372.00 Element Left OB Channel Right OB Vel Head (ft)0.20 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5371.79 Reach Len. (ft)2036.00 1873.91 2008.00 Crit W.S. (ft) Flow Area (sq ft)8368.25 2601.75 2.56 E.G. Slope (ft/ft) 0.002145 Area (sq ft)8368.25 2601.75 2.56 Q Total (cfs)34900.00 Flow (cfs)22240.22 12657.77 2.01 Top Width (ft)2550.16 Top Width (ft)1880.86 667.70 1.60 Vel Total (ft/s)3.18 Avg. Vel. (ft/s)2.66 4.87 0.79 Max Chl Dpth (ft)7.76 Hydr. Depth (ft)4.45 3.90 1.60 Conv. Total (cfs) 753635.3 Conv. (cfs)480258.2 273333.6 43.4 Length Wtd. (ft) 1933.26 Wetted Per. (ft)1882.44 668.37 3.57 Min Ch El (ft)5366.00 Shear (lb/sq ft)0.60 0.52 0.10 Alpha 1.29 Stream Power (lb/ft s)1.58 2.54 0.08 Frctn Loss (ft)5.87 Cum Volume (acre-ft) 317.04 435.14 0.10 C & E Loss (ft)0.03 Cum SA (acres)113.49 132.29 0.08 Plan: FwayM1 Colorado River Site 1 RS: 15834.35 Profile: PF 1 E.G. Elev (ft)5366.09 Element Left OB Channel Right OB Vel Head (ft)0.50 Wt. n-Val. 0.070 0.035 W.S. Elev (ft)5365.59 Reach Len. (ft)2339.00 1918.66 1085.00 Crit W.S. (ft) Flow Area (sq ft)1638.93 5324.94 E.G. Slope (ft/ft) 0.004620 Area (sq ft)1638.93 5324.94 Q Total (cfs)34900.00 Flow (cfs)3317.35 31582.65 Top Width (ft)2814.29 Top Width (ft)1009.03 1805.26 Vel Total (ft/s)5.01 Avg. Vel. (ft/s)2.02 5.93 Max Chl Dpth (ft)3.68 Hydr. Depth (ft)1.62 2.95 Conv. Total (cfs) 513440.2 Conv. (cfs)48804.0 464636.2 Length Wtd. (ft) 1953.01 Wetted Per. (ft)1009.59 1807.21 Min Ch El (ft)5361.91 Shear (lb/sq ft)0.47 0.85 Alpha 1.28 Stream Power (lb/ft s)0.95 5.04 Frctn Loss (ft)6.10 Cum Volume (acre-ft)83.18 264.64 0.04 C & E Loss (ft)0.05 Cum SA (acres)45.95 79.09 0.05 Plan: FwayM1 Colorado River Site 1 RS: 13915.69 Profile: PF 1 E.G. Elev (ft)5359.94 Element Left OB Channel Right OB Vel Head (ft)0.34 Wt. n-Val. 0.070 0.035 0.070 W.S. Elev (ft)5359.60 Reach Len. (ft) Crit W.S. (ft)5358.10 Flow Area (sq ft)1459.11 6691.67 3.55 E.G. Slope (ft/ft) 0.002251 Area (sq ft)1459.11 6691.67 3.55 Q Total (cfs)34900.00 Flow (cfs)2392.54 32504.24 3.22 Top Width (ft)2492.14 Top Width (ft)702.41 1786.08 3.65 Vel Total (ft/s)4.28 Avg. Vel. (ft/s)1.64 4.86 0.91 Max Chl Dpth (ft)5.91 Hydr. Depth (ft)2.08 3.75 0.97 Conv. Total (cfs) 735527.1 Conv. (cfs)50423.4 685035.7 67.9 Length Wtd. (ft) Wetted Per. (ft)702.45 1787.14 4.16 Min Ch El (ft)5353.69 Shear (lb/sq ft)0.29 0.53 0.12 Alpha 1.21 Stream Power (lb/ft s)0.48 2.56 0.11 Frctn Loss (ft) Cum Volume (acre-ft) C & E Loss (ft) Cum SA (acres) Floodplain Engineering Report - Appendix A May 2022 01000200030004000535053555360536553705375538053855390Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 (ft) (ft)LegendEG PF 2 - FwayM1WS PF 2 - FwayM1EG PF 1 - Existing2EG PF 1 - FwayM1WS PF 1 - Existing2WS PF 1 - FwayM1Crit PF 2 - FwayM1Crit PF 1 - FwayM1Crit PF 1 - Existing2GroundBank StaEncroachment.07.035.07Floodplain Engineering Report - Appendix AMay 2022 05001000150020002500300035005404540654085410541254145416541854205422Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 (ft) (ft)LegendEG PF 2 - FwayM1WS PF 2 - FwayM1EG PF 1 - FwayM1EG PF 1 - Existing2WS PF 1 - FwayM1WS PF 1 - Existing2GroundBank StaEncroachment.07.035.07Floodplain Engineering Report - Appendix AMay 2022 0200400600800100012001400540054025404540654085410541254145416Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 (ft) (ft)LegendEG PF 1 - Existing2EG PF 1 - FwayM1EG PF 2 - FwayM1WS PF 1 - FwayM1WS PF 1 - Existing2WS PF 2 - FwayM1Crit PF 1 - Existing2Crit PF 1 - FwayM1Crit PF 2 - FwayM1GroundBank Sta.07.035.07Floodplain Engineering Report - Appendix AMay 2022 020040060080010001200140054005405541054155420Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 I-70 Bridge over Colorado River (ft) (ft)LegendEG PF 2 - FwayM1EG PF 1 - Existing2EG PF 1 - FwayM1WS PF 2 - FwayM1WS PF 1 - FwayM1WS PF 1 - Existing2Crit PF 1 - Existing2Crit PF 1 - FwayM1Crit PF 2 - FwayM1GroundBank Sta.07.035.07Floodplain Engineering Report - Appendix AMay 2022 02004006008001000120014005400540254045406540854105412541454165418Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 I-70 Bridge over Colorado River (ft) (ft)LegendEG PF 1 - Existing2EG PF 1 - FwayM1EG PF 2 - FwayM1WS PF 1 - Existing2WS PF 1 - FwayM1WS PF 2 - FwayM1Crit PF 1 - FwayM1Crit PF 2 - FwayM1Crit PF 1 - Existing2GroundBank StaEncroachment.07.035.07Floodplain Engineering Report - Appendix AMay 2022 020040060080010001200140054005402540454065408541054125414Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 (ft) (ft)LegendEG PF 1 - Existing2EG PF 1 - FwayM1EG PF 2 - FwayM1WS PF 1 - FwayM1Crit PF 1 - FwayM1WS PF 2 - FwayM1Crit PF 2 - FwayM1Crit PF 1 - Existing2WS PF 1 - Existing2GroundBank Sta.07.035.07Floodplain Engineering Report - Appendix AMay 2022 050010001500200025005390540054105420543054405450Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 (ft) (ft)LegendEG PF 2 - FwayM1WS PF 2 - FwayM1EG PF 1 - Existing2EG PF 1 - FwayM1WS PF 1 - Existing2WS PF 1 - FwayM1GroundBank StaEncroachment.07.035.07Floodplain Engineering Report - Appendix AMay 2022 0500100015002000250030003500539054005410542054305440Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 (ft) (ft)LegendEG PF 2 - FwayM1EG PF 1 - Existing2EG PF 1 - FwayM1WS PF 2 - FwayM1WS PF 1 - Existing2WS PF 1 - FwayM1GroundBank StaEncroachment.07.035.07Floodplain Engineering Report - Appendix AMay 2022 01000200030004000538053905400541054205430Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 (ft) (ft)LegendEG PF 2 - FwayM1EG PF 1 - Existing2EG PF 1 - FwayM1WS PF 2 - FwayM1WS PF 1 - Existing2WS PF 1 - FwayM1GroundBank StaEncroachment.07.035.07Floodplain Engineering Report - Appendix AMay 2022 010002000300040005000538053905400541054205430Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 (ft) (ft)LegendEG PF 2 - FwayM1WS PF 2 - FwayM1EG PF 1 - FwayM1EG PF 1 - Existing2WS PF 1 - FwayM1WS PF 1 - Existing2GroundBank StaEncroachment.07.035.07Floodplain Engineering Report - Appendix AMay 2022 0100020003000400050006000535053605370538053905400541054205430Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 (ft) (ft)LegendEG PF 2 - FwayM1WS PF 2 - FwayM1EG PF 1 - FwayM1EG PF 1 - Existing2WS PF 1 - Existing2WS PF 1 - FwayM1GroundBank StaEncroachment.07.035.07Floodplain Engineering Report - Appendix AMay 2022 0100020003000400050006000534053605380540054205440Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 (ft) (ft)LegendEG PF 2 - FwayM1WS PF 2 - FwayM1EG PF 1 - Existing2EG PF 1 - FwayM1WS PF 1 - Existing2WS PF 1 - FwayM1GroundBank StaEncroachment.07.035.07Floodplain Engineering Report - Appendix AMay 2022 0100020003000400050006000700053605370538053905400541054205430Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 (ft) (ft)LegendEG PF 2 - FwayM1WS PF 2 - FwayM1EG PF 1 - Existing2EG PF 1 - FwayM1WS PF 1 - Existing2WS PF 1 - FwayM1GroundBank StaEncroachment.07.035.07Floodplain Engineering Report - Appendix AMay 2022 01000200030004000500060007000535053605370538053905400541054205430Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 (ft) (ft)LegendEG PF 2 - FwayM1WS PF 2 - FwayM1EG PF 1 - Existing2EG PF 1 - FwayM1WS PF 1 - Existing2WS PF 1 - FwayM1GroundBank StaEncroachment.07.035.07Floodplain Engineering Report - Appendix AMay 2022 010002000300040005000536053655370537553805385Colorado River Plan: 1) Existing2 5/14/2020 2) FwayM1 9/14/2020 (ft) (ft)LegendEG PF 2 - FwayM1EG PF 1 - Existing2EG PF 1 - FwayM1WS PF 1 - Existing2WS PF 1 - FwayM1WS PF 2 - FwayM1GroundBank StaEncroachment.07.035.07Floodplain Engineering Report - Appendix AMay 2022 Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 C Attachment C Proof of Ownership Proof of Mineral Rights Research Neighbor Mailing List 1 (( Community Development Department 108 8th Street, Suite 401 Glenwood Springs, CO 81601 (970) 945-8212 www.garfield-county.com PRE-APPLICATION CONFERENCE SUMMARY TAX PARCEL NUMBER: 2179-083-00-103 PRE-APP DATE: 7/15/20, Updated 5/5/22 PROJECT: Rifle Gravel Pit #1 - Scott Contracting - Floodplain Permit OWNER/APPLICANT Scott Contracting Inc. REPRESENTATIVE: Angie Fowler, SGM PRACTICAL LOCATION: Address tbd, approximately 1 mile northeast of the Rifle – Garfield County Airport off of the I-70 north frontage road SITE INFORMATION: The site is approximately 57.9 acres in size and located adjacent to the Colorado River ZONING: Rural TYPE OF APPLICATION: Floodplain Development Permit I. GENERAL PROJECT DESCRIPTION The Applicant is in the process of seeking a Land Use Change Permit for a commercial gravel pit on the 57.9 acre site. A portion of the site has been identified as being with the 100 year floodplain. Development of the site including grading and earth moving associated with the gravel pit requires approval of a Floodplain Development Permit and compliance with the Garfield County Land Use and Development Code (LUDC) standards and requirements. Issues anticipated to be addressed include floodplain, wetlands, and water body setbacks. Site specific detailed floodplain mapping shall be required (consistent with previous submittals ). Revisions to the mining plan are anticipated to eliminate dewatering issues so updates to the floodplain narrative and studies to reflect the new mining plan need to be provided. These should include information on material storage and stockpiles. II. REGULATORY PROVISIONS APPLICANT IS REQUIRED TO ADDRESS The following Sections of the Garfield Land Use and Development Code as amended apply to the proposed Application: 2 • Section 3-301 – Floodplain Overlay Regulations to include 3-301(E)(3). • Section 4-109 – Development in the 100 Year Floodplain, including review criteria. • Table 4-102 – Common Review Procedures and Required Notice • Table 4-201 – Submittal Requirements • Section 4-203 – Submittal Requirements as appropriate • Section 4-203 (O) – Flood Plain Analysis • Section 4-118 – Waiver from Standards (if needed) • Section 7-203(B) & (C) – Protection of Water Bodies III. ADMINISTRATIVE REVIEW PROCESS The review process shall follow a modified version of the steps contained in Table 4-102 and Section 4-103, Administrative Review (see attached flow chart). IV. SUBMITTAL REQUIREMENTS – KEY TOPICS As a convenience, outlined below is a list of information typically required for this type of application. Staff anticipates much of the information will be consistent with the overall gravel pit Land Use Change Permit which has recently been submitted. • General Application Materials o Completed application form o Completed Payment Agreement form o Authorization to represent as appropriate o Proof of Ownership (title work and deed) o Names and mailing addresses of property owners within 200 ft. of the property. o Completed Certification of Mineral Owner Research form o Project description – narrative • Copy of the pre-application summary • A Vicinity Map within approximately 3 miles • Site Plan – to applicable scale, including all proposed improvements and significant features. • Floodplain Analysis meeting the requirements of the LUDC including Sections 3-301 and 4- 203(O) as applicable. Section 3-301(E)(3) needs to be addressed confirming no drainage impacts on adjacent properties. The Flood Plain Analysis/memo needs to be completed by a qualified licensed professional engineer. Some elements may not be applicable based on the type of project. An explanation/justification in those cases should be provided. • The Application will need to include details and plans for the proposed improvements. • The Analysis will need to address the lack of any impacts from the proposed improvements (i.e. no impact on flooding potential – Zero Rise) • The Analysis will need to include information on construction practices including staging areas, stock piling areas, protection of water quality from sediment or erosion potential, equipment to be used, and revegetation plans as appropriate. • The submittals need to address compliance with the Review Criteria contained in S ection 4- 109 (attached) as applicable. • The submittals need to include any other existing reports, studies, and perm its including but not limited to any past review by the Army Corp of Engineers and wetlands analyses. 3 • The submittals need to generally address compliance with Section 7-203 (B), Protection of Water Bodies, Structures Permitted in Setbacks. Any significant removal of vegetation should be addressed in the submittals with waivers requested if needed. Follow-up conversations with Staff and/or our Consulting Engineering are options if additional questions come up regarding the submittal requirements. As noted above some elements of the Flood Plain Analysis may not be applicable and the Application submittals can reflect that representation. The Application submittal needs to include 3 hard copies of the entire Application and 1 Digital PDF Copy of the entire Application (on a CD or USB Stick). Both the paper and digital copies should be split into individual sections and properly labeled. Please refer to the pre-application summary for submittal requirements that are appropriate for your Application. V. APPLICATION REVIEW a. Review by: Staff for completeness recommendation and referral agencies for additional technical review b. Public Hearing: _X_ Director Decision with notice ___ Planning Commission ___ Board of County Commissioners ___ Board of Adjustment VI. APPLICATION REVIEW FEES a. Planning Review Fees: $ 400.00 b. Referral Agency Fees: $ TBD (Fees associated with consulting engineer review) c. Total Deposit: $ 400.00 (additional hours are billed at $40.50 /hour) VII. GENERAL APPLICATION PROCESSING The foregoing summary is advisory in nature only and is not binding on the County. The summar y is based on current zoning, which is subject to change in the future, and upon factual representations that may or may not be accurate. This summary does not create a legal or vested right. The summary is valid for a six month period, after which an upda te should be requested. The Applicant is advised that the Application submittal once accepted by the County becomes public information and will be available (including electronically for review by the public. Proprietary information can be redacted from documents prior to submittal. PRE-APPLICATION SUMMARY PREPARED BY: __________________________________________________ ___5/5/22__________ Glenn Hartmann, Principal Planner Date 4 NOTE: Notice requirements is 15 days prior to the Director’s Decision North – Colorado River Ranch, LLC Property Address: 6073 346 County Road, Silt, Colorado 81652 Owner Address: 10 Mustang Drive, New Castle, Colorado 81647 West - Rex Robinson Ranch, LLC; (includes the Swanson Colorado Trust; Ilgen, Carrol Jeanne; Rosa, Linda Jane; Robinson, James Dean) Property Address: Silt, Colorado Owner Address: 5479 E Weaver Avenue, Centennial, Colorado 80121 South – Colorado Department of Transportation (CDOT) Owner Address: CDOT Region 3, 222, S. 6th Street, Room 100, Grand Junction, Colorado 81501 East – Shidelerosa LLLP [This information was obtained from the Garfield County Colorado Land Explorer (Garfield County, March 2021] Property Address: 1411 County Road 316, Silt, Colorado 81652 Owner Address: Same as property Summary of Retained Rights in Transaction History 1. USA to Sweeny A. Date: March 5, 1906 B. Grantor: United States of America C. Grantee: Laurence Sweeny D. Rights Reserved: “…subject to any vested and accrued water rights for mining, agriculture, manufacturing or other purposes, and rights to ditches and reservoirs used in connection with such water rights as may be recognized and acknowledged by the local customs, laws and decisions of Courts, and also subject to the right of the proprietor of a vein or lode to extract and remove his ore therefrom, should the same be found to penetrate or intersect the premises hereby granted, as provided by law, and there is reserved from the lands hereby granted a right of way thereon for ditches or canals constructed by the authority of the United States.” E. George Yule had conveyed the property to Sweeney in 1891 – this deed was recorded to confirm the rights reserved to the United States when the property was originally conveyed to Yule. 2. Sweeny to Gentry A. Date: March 27, 1972 B. Grantor: Sweeny’s, Inc. C. Grantee: J. Gentry and Ann F. Gentry D. Rights Reserved: “…excepting and reserving to the seller, its successors and assigns, an undivided one-half interested in and to all oil, gas and other minerals existing in connection with the above described lands…” 3. Gentry to Wilson A. Date: February 13, 1973 B. Grantor: J. Gentry and Ann F. Gentry C. Grantee: J. Cooke Wilson, Jr. D. Rights Reserved: “Excepting and reserving to the seller, his heirs and assigns all oil, gas, hydrocarbons and other minerals, together with so much of the surface as may be necessary for the convenient mining or extraction of same, and together, further, the right of ingress and egress for the purpose of prospecting for, developing and producing same.” Account Number R023405 Certificate Number 2019-00660 Parcel 217908300103 Acres 57.90 Order Number ABS63013676 Assessed To Vendor ID 4 MALONE RANCH, LLC & R&B RANCH, LLC 104 CAMPBELL LOOP HATTISBURG, MS 39401 Land Title 1317 Grand Ave #200 Glenwood Springs, CO 81601 Legal Description Situs Address Section: 8 Township: 6 Range: 92 PT OF SWSW(15.77AC), PT OF SESW(35.82AC), SEC. 17 PT OF N1/2NENW & E 248' OF N1/2NWNW(6.31AC Year Tax Interest Fees Payments Balance Tax Charge 2018 $129.52 $0.00 $0.00 ($129.52)$0.00 Total Tax Charge $0.00 Grand Total Due as of 04/18/2019 $0.00 Tax Billed at 2018 Rates for Tax Area 023 - 2HD-SF - 023 Authority Mill Levy Amount GARFIELD COUNTY 13.6550000 $27.31 COLORADO RIVER FIRE PROTECT 6.4590000 $12.92 COLO RIVER WATER CONS 0.2560000 $0.51 WEST DIVIDE WATER CON 0.0370000*$0.07 GRAND RIVER HOSPITAL 9.9450000*$19.90 SCHOOL DISTRICT RE-2 29.3300000 $58.67 COLORADO MTN COLLEGE 3.9970000 $8.00 GARFIELD COUNTY PUBLIC LIBR 1.0720000 $2.14 Taxes Billed 2018 64.7510000 $129.52 * Credit Levy Values Actual Assessed MEADOW HAY LAND -AGRICLTRL $6,900 $2,000 Total $6,900 $2,000 All Tax Lien Sale amounts are subject to change due to endorsement of current taxes by the lienholder or to advertising and distraint warrant fees. Changes may occur and the Treasurer's Office will need to be contacted prior to remittance after September 1, 2019. TAX LIEN SALE REDEMPTION AMOUNTS MUST BE PAID BY CASH OR CASHIER'S CHECK. Special taxing districts and the boundaries of such districts may be on file with the Board of County Commissioners, the County Clerk, or the County Assessor. This certificate does not include land or improvements assessed under a separate account number, personal property taxes, transfer tax or misc. tax collected on behalf of other entities, special or local improvement district assessments or mobile homes, unless specifically mentioned. I, the undersigned, do hereby certify that the entire amount of taxes due upon the above described parcels of real property and all outstanding sales for unpaid taxes as shown by the records in my office from which the same may still be redeemed with the amount required for redemption are as noted herein. In witness whereof, I have hereunto set my hand and seal. GARFIELD COUNTY TREASURER Certificate of Taxes Due Apr 18, 2019 9:41:01 AM Page 1 of 1 Land Title Guarantee Company Customer Distribution PREVENT FRAUD - Please remember to call a member of our closing team when initiating a wire transfer or providing wiring instructions. Order Number:ABS63013676-2 Date: 06/20/2019 Property Address:MALONE RANCH, SILT, CO 81650 PLEASE CONTACT YOUR CLOSER OR CLOSER'S ASSISTANT FOR WIRE TRANSFER INSTRUCTIONS For Closing Assistance Closer's Assistant For Title Assistance Leigh Renfro 102 S TEJON #760 COLORADO SPRINGS, CO 80903 (719) 572-7894 (Work) (303) 393-4774 (Work Fax) lrenfro@ltgc.com Company License: CO44565 Amy Aarons 102 S TEJON #760 COLORADO SPRINGS, CO 80903 (719) 386-0544 (Work) (877) 334-2015 (Work Fax) aaarons@ltgc.com Company License: CO44565 Nicole Hall 5975 GREENWOOD PLAZA BLVD GREENWOOD VILLAGE, CO 80111 (303) 850-4189 (Work) nhall@ltgc.com Buyer/Borrower SCOTT CONTRACTING, INC. Attention: LON SCHUMACHER 9200 E. MINERAL AVE., #400 CENTENNIAL, CO 80112 (303) 279-0900 (Work) lschumacher@scottcontracting.com Delivered via: Electronic Mail Seller/Owner MALONE RANCH, LLC, A COLORADO LIMITED LIABILITY COMPANY Attention: SIDNEY MALONE 104 CAMPBELL LOOP ROAD HATTIESBURG, MS 39401 (601) 408-9726 (Work) maloneranch@gmail.com Delivered via: Electronic Mail Seller/Owner R&B RANCH, LLC, A COLORADO LIMITED LIABILITY COMPANY Attention: ROBERT MCCONNELL 424 TURNBERRY COURT OXFORD, MS 38655 (601) 631-1067 (Work) bobbyjo03@hotmail.com Delivered via: Electronic Mail Attorney for Seller HOFFMAN NIES DAVE & MEYER Attention: MARK A MEYER 5350 S ROSLYN ST #100 GREENWOOD VILLAGE, CO 80111 (303) 860-7140 (Work) (303) 623-9222 (Work Fax) (720) 390-3458 (Other) mmeyer@hn-colaw.com Land Title Guarantee Company Estimate of Title Fees Order Number:ABS63013676-2 Date: 06/20/2019 Property Address:MALONE RANCH, SILT, CO 81650 Parties:SCOTT CONTRACTING, INC. A COLORADO CORPORATION MALONE RANCH, LLC, A COLORADO LIMITED LIABILITY COMPANY AND R & B RANCH, LLC, A COLORADO LIMITED LIABILITY COMPANY Visit Land Title's Website at www.ltgc.com for directions to any of our offices. Estimate of Title insurance Fees "ALTA" Owner's Policy 06-17-06 $4,844.00 Deletion of Standard Exception(s)$100.00 Tax Certificate $26.00 Total $4,970.00 If Land Title Guarantee Company will be closing this transaction, the fees listed above will be collected at closing. Thank you for your order! Note: The documents linked in this commitment should be reviewed carefully. These documents, such as covenants conditions and restrictions, may affect the title, ownership and use of the property. You may wish to engage legal assistance in order to fully understand and be aware of the implications of the effect of these documents on your property. Chain of Title Documents: Garfield county recorded 06/03/2009 under reception no. 769092 Property Address: MALONE RANCH, SILT, CO 81650 1. Effective Date: 05/31/2019 at 5:00 P.M. 2. Policy to be Issued and Proposed Insured: "ALTA" Owner's Policy 06-17-06 Proposed Insured: SCOTT CONTRACTING, INC. A COLORADO CORPORATION $2,700,000.00 3. The estate or interest in the land described or referred to in this Commitment and covered herein is: A FEE SIMPLE 4. Title to the estate or interest covered herein is at the effective date hereof vested in: MALONE RANCH, LLC, A COLORADO LIMITED LIABILITY COMPANY AND R & B RANCH, LLC, A COLORADO LIMITED LIABILITY COMPANY 5. The Land referred to in this Commitment is described as follows: TOWNSHIP 6 SOUTH, RANGE 92 WEST OF THE 6TH P.M.,​ SECTION 8: S1/2 SW 1/4​ SECTION 17: NE 1/4 NW 1/4 AND NW 1/4 NW 1/4​ LESS AND EXCEPTING THE FOLLOWING TRACTS OF LAND PREVIOUSLY CONVEYED AND RECORDED:​ 1. A TRACT OF LAND LOCATED IN THE SW 1/4 SW 1/4 SECTION 8, AND THE NW1/4 NW 1/4 SECTION 17, CONVEYED BY GEORGE YULE BY WARRANTY DEED RECORDED APRIL 17, 1893 IN BOOK 32 AT PAGE 425.​ 2. A TRACT OF LAND LYING IN THE SE CORNER OF THE NE 1/4 NW 1/4 OF SECTION 17 AS GRANTED TO SCHOOL DISTRICT 27 OF GARFIELD COUNTY BY WARRANTY DEED DATED OCTOBER 10, 1891, RECORDED OCTOBER 12, 1891 IN BOOK 25 AT PAGE 188.​ 3. A TRACT OF LAND LYING IN THE SE 1/4 SW 1/4 SECTION 8, AND N 1/2 NW 1/4 SECTION 17 COMPRISING INTERSTATE HIGHWAY 70 R.O.W., INCLUDING:​ THAT PART OF THE N 1/2 NW 1/4 SECTION 17 CONVEYED TO THE BOARD OF COUNTY COMMISSIONERS OF THE COUNTY OF GARFIELD, STATE OF COLORADO AND STATE DEPARTMENT OF HIGHWAYS, DIVISION OF HIGHWAYS, STATE OF COLORADO BY COURT ORDER RECORDED FEBRUARY 24, 1977 IN BOOK 493 AT PAGE 768.​ 4. THAT PORTION OF THE NE1/4NW1/4 AND NW1/4NW1/4 OF SECTION 17, TOWNSHIP 6 SOUTH, RANGE 92 WEST, SITUATE SOUTHERLY OF THE INTERSTATE HIGHWAY 70 RIGHT OF WAY, AS CONVEYED TO JACQUE COUEY BURRIS BY SPECIAL WARRANTY DEED RECORDED OCTOBER 4, 1991 IN BOOK 814 AT PAGE 812.​ COUNTY OF GARFIELD,​ ALTA COMMITMENT Old Republic National Title Insurance Company Schedule A Order Number:ABS63013676-2 Copyright 2006-2019 American Land Title Association. All rights reserved. The use of this Form is restricted to ALTA licensees and ALTA members in good standing as of the date of use. All other uses are prohibited. Reprinted under license from the American Land Title Association. STATE OF COLORADO. ALTA COMMITMENT Old Republic National Title Insurance Company Schedule A Order Number:ABS63013676-2 ALTA COMMITMENT Old Republic National Title Insurance Company Schedule B, Part I (Requirements) Order Number: ABS63013676-2 All of the following Requirements must be met: This proposed Insured must notify the Company in writing of the name of any party not referred to in this Commitment who will obtain an interest in the Land or who will make a loan on the Land. The Company may then make additional Requirements or Exceptions. Pay the agreed amount for the estate or interest to be insured. Pay the premiums, fees, and charges for the Policy to the Company. Documents satisfactory to the Company that convey the Title or create the Mortgage to be insured, or both, must be properly authorized, executed, delivered, and recorded in the Public Records. 1. PROVIDE LAND TITLE GUARANTEE COMPANY WITH A CURRENT ALTA/NSPS LAND TITLE SURVEY OF SUBJECT PROPERTY. UPON REVIEW, ADDITIONAL REQUIREMENTS AND/OR EXCEPTIONS MAY BE NECESSARY. LAND TITLE IS NOT RESPONSIBLE FOR ORDERING SAID ALTA/NSPS LAND TITLE SURVEY. SAID SURVEY MUST BE CERTIFIED TO LAND TITLE GUARANTEE COMPANY AND OLD REPUBLIC NATIONAL TITLE INSURANCE COMPANY. 2. A FULL COPY OF THE FULLY EXECUTED OPERATING AGREEMENT AND ANY AND ALL AMENDMENTS THERETO FOR MALONE RANCH, LLC, A COLORADO LIMITED LIABILITY COMPANY MUST BE FURNISHED TO LAND TITLE GUARANTEE COMPANY. SAID AGREEMENT MUST DISCLOSE WHO MAY CONVEY, ACQUIRE, ENCUMBER, LEASE OR OTHERWISE DEAL WITH INTERESTS IN REAL PROPERTY FOR SAID ENTITY. NOTE: ADDITIONAL REQUIREMENTS MAY BE NECESSARY UPON REVIEW OF THIS DOCUMENTATION. 3. WRITTEN CONFIRMATION THAT THE INFORMATION CONTAINED IN STATEMENT OF AUTHORITY FOR MALONE RANCH, LLC, A COLORADO LIMITED LIABILITY COMPANY RECORDED DECEMBER 28, 2015 AT RECEPTION NO. 871810 IS CURRENT. NOTE: SAID INSTRUMENT DISCLOSES SIDNEY E. MALONE AND ANN RICHELLE MALONE AS THE MANAGERS AUTHORIZED TO EXECUTE INSTRUMENTS CONVEYING, ENCUMBERING OR OTHERWISE AFFECTING TITLE TO REAL PROPERTY ON BEHALF OF SAID ENTITY. IF THIS INFORMATION IS NOT ACCURATE, A CURRENT STATEMENT OF AUTHORITY MUST BE RECORDED. 4. A FULL COPY OF THE FULLY EXECUTED OPERATING AGREEMENT AND ANY AND ALL AMENDMENTS THERETO FOR R & B RANCH, LLC, A COLORADO LIMITED LIABILITY COMPANY MUST BE FURNISHED TO LAND TITLE GUARANTEE COMPANY. SAID AGREEMENT MUST DISCLOSE WHO MAY CONVEY, ACQUIRE, ENCUMBER, LEASE OR OTHERWISE DEAL WITH INTERESTS IN REAL PROPERTY FOR SAID ENTITY. NOTE: ADDITIONAL REQUIREMENTS MAY BE NECESSARY UPON REVIEW OF THIS DOCUMENTATION. 5. WRITTEN CONFIRMATION THAT THE INFORMATION CONTAINED IN STATEMENT OF AUTHORITY FOR R & B RANCH, LLC, A COLORADO LIMITED LIABILITY COMPANY RECORDED AUGUST 11, 2016 AT RECEPTION NO. 880935 IS CURRENT. NOTE: SAID INSTRUMENT DISCLOSES ROBERT MCCONNELL AS THE MANAGER AUTHORIZED TO EXECUTE INSTRUMENTS CONVEYING, ENCUMBERING OR OTHERWISE AFFECTING TITLE TO REAL PROPERTY ON BEHALF OF SAID ENTITY. IF THIS INFORMATION IS NOT ACCURATE, A CURRENT STATEMENT OF AUTHORITY MUST BE RECORDED. 6. (THIS ITEM WAS INTENTIONALLY DELETED) 7. (THIS ITEM WAS INTENTIONALLY DELETED) 8. GENERAL WARRANTY DEED FROM MALONE RANCH, LLC, A COLORADO LIMITED LIABILITY COMPANY AND R & B RANCH, LLC, A COLORADO LIMITED LIABILITY COMPANY TO SCOTT CONTRACTING, INC. A COLORADO CORPORATION CONVEYING SUBJECT PROPERTY. REQUIREMENTS TO DELETE THE PRE-PRINTED EXCEPTIONS IN THE OWNER'S POLICY TO BE ISSUED A. ITEMS 1-3 OF THE PRE-PRINTED EXCEPTIONS WILL BE DELETED UPON RECEIPT OF AN APPROVED ALTA/NSPS LAND TITLE SURVEY. MATTERS DISCLOSED BY SAID ALTA/NSPS LAND TITLE SURVEY MAY BE ADDED TO SCHEDULE B, PART II HEREOF. B. UPON THE APPROVAL OF THE COMPANY AND THE RECEIPT OF A NOTARIZED FINAL LIEN AFFIDAVIT, ITEM 4 OF THE PRE-PRINTED EXCEPTIONS, WILL BE AMENDED TO READ: ITEM 4 OF THE PRE-PRINTED EXCEPTIONS IS DELETED AS TO ANY LIENS OR FUTURE LIENS RESULTING FROM WORK OR MATERIAL FURNISHED AT THE SPECIFIC, DIRECT REQUEST, AND WITH THE ACTUAL KNOWLEDGE OF MALONE RANCH, LLC, A COLORADO LIMITED LIABILITY COMPANY AND R & B RANCH, LLC, A COLORADO LIMITED LIABILITY COMPANY. OLD REPUBLIC NATIONAL TITLE INSURANCE COMPANY SHALL HAVE NO LIABILITY FOR ANY LIENS ARISING FROM WORK OR MATERIAL FURNISHED AT THE SPECIFIC, DIRECT REQUEST, AND WITH THE ACTUAL KNOWLEDGE OF SCOTT CONTRACTING, INC. A COLORADO CORPORATION. C. ITEM 5 OF THE PRE-PRINTED EXCEPTIONS WILL BE DELETED IF LAND TITLE GUARANTEE COMPANY CONDUCTS THE CLOSING OF THE CONTEMPLATED TRANSACTION(S) AND RECORDS THE DOCUMENTS IN CONNECTION THEREWITH. D. UPON PROOF OF PAYMENT OF 2018 TAXES AND ASSESSMENTS, ITEM 6 OF THE PRE-PRINTED EXCEPTIONS WILL BE AMENDED TO READ: TAXES AND ASSESSMENTS FOR THE YEAR 2019 AND SUBSEQUENT YEARS. ALTA COMMITMENT Old Republic National Title Insurance Company Schedule B, Part I (Requirements) Order Number: ABS63013676-2 All of the following Requirements must be met: This commitment does not republish any covenants, condition, restriction, or limitation contained in any document referred to in this commitment to the extent that the specific covenant, conditions, restriction, or limitation violates state or federal law based on race, color, religion, sex, sexual orientation, gender identity, handicap, familial status, or national origin. 1. Any facts, rights, interests, or claims thereof, not shown by the Public Records but that could be ascertained by an inspection of the Land or that may be asserted by persons in possession of the Land. 2. Easements, liens or encumbrances, or claims thereof, not shown by the Public Records. 3. Any encroachment, encumbrance, violation, variation, or adverse circumstance affecting the Title that would be disclosed by an accurate and complete land survey of the Land and not shown by the Public Records. 4. Any lien, or right to a lien, for services, labor or material heretofore or hereafter furnished, imposed by law and not shown by the Public Records. 5. Defects, liens, encumbrances, adverse claims or other matters, if any, created, first appearing in the public records or attaching subsequent to the effective date hereof but prior to the date of the proposed insured acquires of record for value the estate or interest or mortgage thereon covered by this Commitment. 6. (a) Taxes or assessments that are not shown as existing liens by the records of any taxing authority that levies taxes or assessments on real property or by the Public Records; (b) proceedings by a public agency that may result in taxes or assessments, or notices of such proceedings, whether or not shown by the records of such agency or by the Public Records. 7. (a) Unpatented mining claims; (b) reservations or exceptions in patents or in Acts authorizing the issuance thereof; (c) water rights, claims or title to water. 8. EXISTING LEASES AND TENANCIES, IF ANY. 9. ANY AND ALL RIGHTS OF A DITCH COMPANY RELATING TO THE UNNAMED DITCHES TRAVERSING SUBJECT PROPERTY, INCLUDING BUT NOT LIMITED TO DITCH MAINTENANCE AND ACCESS RIGHTS TO LANDS ADJOINING THE DITCH OR CANAL. 10. NOTWITHSTANDING THE INSURING CLAUSES OF THE POLICY, THE COMPANY DOES NOT INSURE AGAINST LOSS OR DAMAGE BY REASON OF A LACK OF A RIGHT OF PHYSICAL ACCESS TO AND FROM THE LAND. 11. RIGHT OF THE PROPRIETOR OF A VEIN OR LODE TO EXTRACT AND REMOVE HIS ORE THEREFROM, SHOULD THE SAME BE FOUND TO PENETRATE OR INTERSECT THE PREMISES HEREBY GRANTED, AND A RIGHT OF WAY FOR DITCHES OR CANALS CONSTRUCTED BY THE AUTHORITY OF THE UNITED STATES, AS RESERVED IN UNITED STATES PATENT RECORDED MARCH 05, 1906 IN BOOK 56 AT PAGE 537. 12. RESERVATION OF ONE-HALF INTEREST IN ALL OIL, GAS AND OTHER MINERALS AS EVIDENCED IN INSTRUMENT RECORDED MARCH 27, 1972 IN BOOK 428 AT PAGE 459, AND ANY AND ALL ASSIGNMENTS THEREOF OR INTERESTS THEREIN. ALTA COMMITMENT Old Republic National Title Insurance Company Schedule B, Part II (Exceptions) Order Number: ABS63013676-2 13. ALL OIL, GAS, HYDROCARBONS AND OTHER MINERALS, TOGETHER WITH SO MUCH OF THE SURFACE AS MAY BE NECESSARY FOR THE CONVENIENT MINING OR EXTRACTION OF SAME, AND TOGETHER, FURTHER, THE RIGHT OF INGRESS AND EGRESS FOR THE PURPOSES OF PROSPECTING FOR, DEVELOPING AND PRODUCING SAME, AS RESERVED IN INSTRUMENTS RECORDED FEBRUARY 13, 1973 IN BOOK 440 AT PAGE 469, AND ANY AND ALL ASSIGNMENTS THEREOF OR INTERESTS THEREIN. 14. NO RIGHT OR RIGHTS OF ACCESS TO AND FROM THE HIGHWAY AS EVIDENCED IN RULE AND ORDER RECORDED FEBRUARY 24, 1977 IN BOOK 493 AT PAGE 768. 15. OIL AND GAS LEASE RECORDED NOVEMBER 02, 1982, IN BOOK 612 AT PAGE 973, AND ANY AND ALL ASSIGNMENTS THEREOF OR INTERESTS THEREIN. 16. RESERVATION OF ALL OIL SHALE, KEROGEN, SHALE OIL, COAL, OIL, GAS, FISSIONABLE MATERIAL AN ALL OTHER MINERALS OF ANY KIND OR NATURE AS EVIDENCED BY SPECIAL WARRANTY DEED RECORDED NOVEMBER 03, 1989 IN BOOK 766 AT PAGE 317, AND ANY AND ALL ASSIGNMENTS THEREOF OR INTERESTS THEREIN. 17. TERMS, CONDITIONS, PROVISIONS, BURDENS AND OBLIGATIONS AS SET FORTH IN WATER WELL SHARING AGREEMENT RECORDED JUNE 05, 2009 UNDER RECEPTION NO. 769089. ALTA COMMITMENT Old Republic National Title Insurance Company Schedule B, Part II (Exceptions) Order Number: ABS63013676-2 LAND TITLE GUARANTEE COMPANY DISCLOSURE STATEMENTS Note: Pursuant to CRS 10-11-122, notice is hereby given that: Note: Effective September 1, 1997, CRS 30-10-406 requires that all documents received for recording or filing in the clerk and recorder's office shall contain a top margin of at least one inch and a left, right and bottom margin of at least one half of an inch. The clerk and recorder may refuse to record or file any document that does not conform, except that, the requirement for the top margin shall not apply to documents using forms on which space is provided for recording or filing information at the top margin of the document. Note: Colorado Division of Insurance Regulations 8-1-2 requires that "Every title entity shall be responsible for all matters which appear of record prior to the time of recording whenever the title entity conducts the closing and is responsible for recording or filing of legal documents resulting from the transaction which was closed". Provided that Land Title Guarantee Company conducts the closing of the insured transaction and is responsible for recording the legal documents from the transaction, exception number 5 will not appear on the Owner's Title Policy and the Lenders Policy when issued. Note: Affirmative mechanic's lien protection for the Owner may be available (typically by deletion of Exception no. 4 of Schedule B, Section 2 of the Commitment from the Owner's Policy to be issued) upon compliance with the following conditions: No coverage will be given under any circumstances for labor or material for which the insured has contracted for or agreed to pay. The Subject real property may be located in a special taxing district.(A) A certificate of taxes due listing each taxing jurisdiction will be obtained from the county treasurer of the county in which the real property is located or that county treasurer's authorized agent unless the proposed insured provides written instructions to the contrary. (for an Owner's Policy of Title Insurance pertaining to a sale of residential real property). (B) The information regarding special districts and the boundaries of such districts may be obtained from the Board of County Commissioners, the County Clerk and Recorder, or the County Assessor. (C) The land described in Schedule A of this commitment must be a single family residence which includes a condominium or townhouse unit. (A) No labor or materials have been furnished by mechanics or material-men for purposes of construction on the land described in Schedule A of this Commitment within the past 6 months. (B) The Company must receive an appropriate affidavit indemnifying the Company against un-filed mechanic's and material-men's liens. (C) The Company must receive payment of the appropriate premium.(D) If there has been construction, improvements or major repairs undertaken on the property to be purchased within six months prior to the Date of Commitment, the requirements to obtain coverage for unrecorded liens will include: disclosure of certain construction information; financial information as to the seller, the builder and or the contractor; payment of the appropriate premium fully executed Indemnity Agreements satisfactory to the company, and, any additional requirements as may be necessary after an examination of the aforesaid information by the Company. (E) Note: Pursuant to CRS 10-11-123, notice is hereby given: This notice applies to owner's policy commitments disclosing that a mineral estate has been severed from the surface estate, in Schedule B-2. Note: Pursuant to CRS 10-1-128(6)(a), It is unlawful to knowingly provide false, incomplete, or misleading facts or information to an insurance company for the purpose of defrauding or attempting to defraud the company. Penalties may include imprisonment, fines, denial of insurance, and civil damages. Any insurance company or agent of an insurance company who knowingly provides false, incomplete, or misleading facts or information to a policyholder or claimant for the purpose of defrauding or attempting to defraud the policyholder or claimant with regard to a settlement or award payable from insurance proceeds shall be reported to the Colorado Division of Insurance within the Department of Regulatory Agencies. Note: Pursuant to Colorado Division of Insurance Regulations 8-1-3, notice is hereby given of the availability of a closing protection letter for the lender, purchaser, lessee or seller in connection with this transaction. That there is recorded evidence that a mineral estate has been severed, leased, or otherwise conveyed from the surface estate and that there is substantial likelihood that a third party holds some or all interest in oil, gas, other minerals, or geothermal energy in the property; and (A) That such mineral estate may include the right to enter and use the property without the surface owner's permission. (B) JOINT NOTICE OF PRIVACY POLICY OF LAND TITLE GUARANTEE COMPANY, LAND TITLE GUARANTEE COMPANY OF SUMMIT COUNTY LAND TITLE INSURANCE CORPORATION AND OLD REPUBLIC NATIONAL TITLE INSURANCE COMPANY This Statement is provided to you as a customer of Land Title Guarantee Company as agent for Land Title Insurance Corporation and Old Republic National Title Insurance Company. We want you to know that we recognize and respect your privacy expectations and the requirements of federal and state privacy laws. Information security is one of our highest priorities. We recognize that maintaining your trust and confidence is the bedrock of our business. We maintain and regularly review internal and external safeguards against unauthorized access to your non-public personal information ("Personal Information"). In the course of our business, we may collect Personal Information about you from: applications or other forms we receive from you, including communications sent through TMX, our web-based transaction management system; your transactions with, or from the services being performed by us, our affiliates, or others; a consumer reporting agency, if such information is provided to us in connection with your transaction; and The public records maintained by governmental entities that we obtain either directly from those entities, or from our affiliates and non-affiliates. Our policies regarding the protection of the confidentiality and security of your Personal Information are as follows: We restrict access to all Personal Information about you to those employees who need to know that information in order to provide products and services to you. We may share your Personal Information with affiliated contractors or service providers who provide services in the course of our business, but only to the extent necessary for these providers to perform their services and to provide these services to you as may be required by your transaction. We maintain physical, electronic and procedural safeguards that comply with federal standards to protect your Personal Information from unauthorized access or intrusion. Employees who violate our strict policies and procedures regarding privacy are subject to disciplinary action. We regularly assess security standards and procedures to protect against unauthorized access to Personal Information. WE DO NOT DISCLOSE ANY PERSONAL INFORMATION ABOUT YOU WITH ANYONE FOR ANY PURPOSE THAT IS NOT STATED ABOVE OR PERMITTED BY LAW. Consistent with applicable privacy laws, there are some situations in which Personal Information may be disclosed. We may disclose your Personal Information when you direct or give us permission; when we are required by law to do so, for example, if we are served a subpoena; or when we suspect fraudulent or criminal activities. We also may disclose your Personal Information when otherwise permitted by applicable privacy laws such as, for example, when disclosure is needed to enforce our rights arising out of any agreement, transaction or relationship with you. Our policy regarding dispute resolution is as follows: Any controversy or claim arising out of or relating to our privacy policy, or the breach thereof, shall be settled by arbitration in accordance with the rules of the American Arbitration Association, and judgment upon the award rendered by the arbitrator(s) may be entered in any court having jurisdiction thereof. Commitment For Title Insurance Issued by Old Republic National Title Insurance Corporation NOTICE IMPORTANT—READ CAREFULLY: THIS COMMITMENT IS AN OFFER TO ISSUE ONE OR MORE TITLE INSURANCE POLICIES. ALL CLAIMS OR REMEDIES SOUGHT AGAINST THE COMPANY INVOLVING THE CONTENT OF THIS COMMITMENT OR THE POLICY MUST BE BASED SOLELY IN CONTRACT. THIS COMMITMENT IS NOT AN ABSTRACT OF TITLE, REPORT OF THE CONDITION OF TITLE, LEGAL OPINION, OPINION OF TITLE, OR OTHER REPRESENTATION OF THE STATUS OF TITLE. THE PROCEDURES USED BY THE COMPANY TO DETERMINE INSURABILITY OF THE TITLE, INCLUDING ANY SEARCH AND EXAMINATION, ARE PROPRIETARY TO THE COMPANY, WERE PERFORMED SOLELY FOR THE BENEFIT OF THE COMPANY, AND CREATE NO EXTRACONTRACTUAL LIABILITY TO ANY PERSON, INCLUDING A PROPOSED INSURED. THE COMPANY’S OBLIGATION UNDER THIS COMMITMENT IS TO ISSUE A POLICY TO A PROPOSED INSURED IDENTIFIED IN SCHEDULE A IN ACCORDANCE WITH THE TERMS AND PROVISIONS OF THIS COMMITMENT. THE COMPANY HAS NO LIABILITY OR OBLIGATION INVOLVING THE CONTENT OF THIS COMMITMENT TO ANY OTHER PERSON. . COMMITMENT TO ISSUE POLICY Subject to the Notice; Schedule B, Part I—Requirements; Schedule B, Part II—Exceptions; and the Commitment Conditions, Old Republic National Title Insurance Company, a Minnesota corporation (the “Company”), commits to issue the Policy according to the terms and provisions of this Commitment. This Commitment is effective as of the Commitment Date shown in Schedule A for each Policy described in Schedule A, only when the Company has entered in Schedule A both the specified dollar amount as the Proposed Policy Amount and the name of the Proposed Insured. If all of the Schedule B, Part I—Requirements have not been met within 6 months after the Commitment Date, this Commitment terminates and the Company’s liability and obligation end. COMMITMENT CONDITIONS 1. DEFINITIONS 2. If all of the Schedule B, Part I—Requirements have not been met within the time period specified in the Commitment to Issue Policy, Comitment terminates and the Company’s liability and obligation end. 3. The Company’s liability and obligation is limited by and this Commitment is not valid without: 4. COMPANY’S RIGHT TO AMEND The Company may amend this Commitment at any time. If the Company amends this Commitment to add a defect, lien, encumbrance, adverse claim, or other matter recorded in the Public Records prior to the Commitment Date, any liability of the Company is limited by Commitment Condition 5. The Company shall not be liable for any other amendment to this Commitment. 5. LIMITATIONS OF LIABILITY i. comply with the Schedule B, Part I—Requirements; ii. eliminate, with the Company’s written consent, any Schedule B, Part II—Exceptions; or iii. acquire the Title or create the Mortgage covered by this Commitment. “Knowledge” or “Known”: Actual or imputed knowledge, but not constructive notice imparted by the Public Records.(a) “Land”: The land described in Schedule A and affixed improvements that by law constitute real property. The term “Land” does not include any property beyond the lines of the area described in Schedule A, nor any right, title, interest, estate, or easement in abutting streets, roads, avenues, alleys, lanes, ways, or waterways, but this does not modify or limit the extent that a right of access to and from the Land is to be insured by the Policy. (b) “Mortgage”: A mortgage, deed of trust, or other security instrument, including one evidenced by electronic means authorized by law.(c) “Policy”: Each contract of title insurance, in a form adopted by the American Land Title Association, issued or to be issued by the Company pursuant to this Commitment. (d) “Proposed Insured”: Each person identified in Schedule A as the Proposed Insured of each Policy to be issued pursuant to this Commitment.(e) “Proposed Policy Amount”: Each dollar amount specified in Schedule A as the Proposed Policy Amount of each Policy to be issued pursuant to this Commitment. (f) “Public Records”: Records established under state statutes at the Commitment Date for the purpose of imparting constructive notice of matters relating to real property to purchasers for value and without Knowledge. (g) “Title”: The estate or interest described in Schedule A.(h) the Notice;(a) the Commitment to Issue Policy;(b) the Commitment Conditions;(c) Schedule A;(d) Schedule B, Part I—Requirements; and(e) Schedule B, Part II—Exceptions; and(f) a counter-signature by the Company or its issuing agent that may be in electronic form.(g) The Company’s liability under Commitment Condition 4 is limited to the Proposed Insured’s actual expense incurred in the interval between the Company’s delivery to the Proposed Insured of the Commitment and the delivery of the amended Commitment, resulting from the Proposed Insured’s good faith reliance to: (a) The Company shall not be liable under Commitment Condition 5(a) if the Proposed Insured requested the amendment or had Knowledge of the matter and did not notify the Company about it in writing. (b) The Company will only have liability under Commitment Condition 4 if the Proposed Insured would not have incurred the expense had the Commitment included the added matter when the Commitment was first delivered to the Proposed Insured. (c) The Company’s liability shall not exceed the lesser of the Proposed Insured’s actual expense incurred in good faith and described in Commitment Conditions 5(a)(i) through 5(a)(iii) or the Proposed Policy Amount. (d) The Company shall not be liable for the content of the Transaction Identification Data, if any.(e) 6. LIABILITY OF THE COMPANY MUST BE BASED ON THIS COMMITMENT 7. IF THIS COMMITMENT HAS BEEN ISSUED BY AN ISSUING AGENT The issuing agent is the Company’s agent only for the limited purpose of issuing title insurance commitments and policies. The issuing agent is not the Company’s agent for the purpose of providing closing or settlement services. 8. PRO-FORMA POLICY The Company may provide, at the request of a Proposed Insured, a pro-forma policy illustrating the coverage that the Company may provide. A pro-forma policy neither reflects the status of Title at the time that the pro-forma policy is delivered to a Proposed Insured, nor is it a commitment to insure. 9. ARBITRATION The Policy contains an arbitration clause. All arbitrable matters when the Proposed Policy Amount is $2,000,000 or less shall be arbitrated at the option of either the Company or the Proposed Insured as the exclusive remedy of the parties. A Proposed Insured may review a copy of the arbitration rules at http://www.alta.org/arbitration. IN WITNESS WHEREOF, Land Title Insurance Corporation has caused its corporate name and seal to be affixed by its duly authorized officers on the date shown in Schedule A to be valid when countersigned by a validating officer or other authorized signatory. Issued by: Land Title Guarantee Company 3033 East First Avenue Suite 600 Denver, Colorado 80206 303-321-1880 President Old Republic National Title Insurance Company, a Stock Company 400 Second Avenue South Minneapolis, Minnesota 55401 (612)371-1111 Mark Bilbrey, President Rande Yeager, Secretary This page is only a part of a 2016 ALTA® Commitment for Title Insurance issued by Land Title Insurance Corporation. This Commitment is not valid without the Notice; the Commitment to Issue Policy; the Commitment Conditions; Schedule A; Schedule B, Part I—Requirements; and Schedule B, Part II—Exceptions; and a counter-signature by the Company or its issuing agent that may be in electronic form. Copyright 2006-2016 American Land Title Association. All rights reserved. The use of this Form (or any derivative thereof) is restricted to ALTA licensees and ALTA members in good standing as of the date of use. All other uses are prohibited. Reprinted under license from the American Land Title Association. In no event shall the Company be obligated to issue the Policy referred to in this Commitment unless all of the Schedule B, Part I—Requirements have been met to the satisfaction of the Company. (f) In any event, the Company’s liability is limited by the terms and provisions of the Policy.(g) Only a Proposed Insured identified in Schedule A, and no other person, may make a claim under this Commitment.(a) Any claim must be based in contract and must be restricted solely to the terms and provisions of this Commitment.(b) Until the Policy is issued, this Commitment, as last revised, is the exclusive and entire agreement between the parties with respect to the subject matter of this Commitment and supersedes all prior commitment negotiations, representations, and proposals of any kind, whether written or oral, express or implied, relating to the subject matter of this Commitment. (c) The deletion or modification of any Schedule B, Part II—Exception does not constitute an agreement or obligation to provide coverage beyond the terms and provisions of this Commitment or the Policy. (d) Any amendment or endorsement to this Commitment must be in writing and authenticated by a person authorized by the Company.(e) When the Policy is issued, all liability and obligation under this Commitment will end and the Company’s only liability will be under the Policy.(f) Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 D Attachment D CDOT Access Permit #320024 PROJECT LOCATION MAP Section 8 & 17, Township 6 South, Range 92 West 6th Prime Meridian SCOTT CONTRACTING INC. CDOT ACCESS PERMIT #320024 RIFLE GRAVEL PIT NO. 1 JANUARY 2021 CONSTRUCTION PLANS N.T.S. Drawing File Name: RiflePit-Rdwy-Admin 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Project Engineer: PROJECT STARTED: / / Comments: Project No./Code 1 -- -- Sheet Number No Revisions: Revised: Void: Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/2021 Last Modification Date: 1/26/2021 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 As Constructed Resident Engineer: Contract Information Contractor: ACCEPTED: / /Scale: As Shown Quality Control: SHEET NO.INDEX OF SHEETS 1 TITLE SHEET 2 STANDARD PLANS 3-5 GENERAL NOTES 6 SUMMARY OF APPROXIMATE QUANTITIES (SAQ) 7 TYPICAL SECTIONS 8 DETAILS 9-11 GEOMETRY PLAN 12-16 PLAN & PROFILE 17 DRIVEWAY PLAN AND PROFILE 18-20 TRAFFIC CONTROL 21-25 STORM WATER MANAGEMENT PLAN (SWMP) 26-28 EROSION CONTROL 29 SIGNING & STRIPING 30-31 CROSS SECTIONS 32 WB-50 TURNING MOVEMENT TABULATION OF LENGTH 01-27-21 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 STANDARD PLANS ADMIN 2 of 6 Project No./Code 2 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Admin Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 1/26/2021 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 GENERAL NOTES (1) ADMIN 3 of 6 Project No./Code 3 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Admin Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 1/26/2021 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 GENERAL NOTES (2) ADMIN 4 of 6 Project No./Code 4 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Admin Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 1/26/2021 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 “” ” 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 GENERAL NOTES (3) ---- of -- Project No./Code 5 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Admin Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 1/26/2021 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 SAQ SAQ 1 of 1 Project No./Code 6 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Admin Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 1/26/2021 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 TYPICAL SECTIONS ADMIN 5 of 6 Project No./Code 7 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Admin Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 1/26/2021 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 DETAILS ADMIN 6 of 6 Project No./Code 8 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Admin Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 1/26/2021 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 Graphic Scale In Feet: 1" = 100' 0 50 100 200 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 GEOMETRY PLAN (1) GEOM 1 of 3 Project No./Code 9 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Geom Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 Graphic Scale In Feet: 1" = 100' 0 50 100 200 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 GEOMETRY PLAN (2) GEOM 2 of 3 Project No./Code 10 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Geom Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 Graphic Scale In Feet: 1" = 100' 0 50 100 200 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 GEOMETRY PLAN (3) GEOM 3 of 3 Project No./Code 11 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Geom Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 Graphic Scale In Feet: 1" = 50' 0 25 50 100 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 PLAN & PROFILE (1) PP 1 of 5 Project No./Code 12 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-PP Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 Graphic Scale In Feet: 1" = 50' 0 25 50 100 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 PLAN & PROFILE (2) PP 2 of 5 Project No./Code 13 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-PP Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 Graphic Scale In Feet: 1" = 50' 0 25 50 100 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 PLAN & PROFILE (3) PP 3 of 5 Project No./Code 14 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-PP Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 Graphic Scale In Feet: 1" = 50' 0 25 50 100 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 PLAN & PROFILE (4) PP 4 of 5 Project No./Code 15 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-PP Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 Graphic Scale In Feet: 1" = 50' 0 25 50 100 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 PLAN & PROFILE (5) PP 5 of 5 Project No./Code 16 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-PP Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 RiflePit-DwayPP118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Engineer:Drawn By:Sheet Subset:JJLJJLStructureNumbers17____--CDOT ACCESS PERMIT #320024DRIVEWAY PLAN & PROFILESubset Sheets:No.:Code:Sheet Number:No Revisions:Revised:Void:DateCommentsInit.Rev.Computer File InformationPrint Date: 1/26/21Last Modification Date: 12/7/2020Quality Control: RNDrawing File Name:SGM Project No.: 2019-341.002Graphic ScaleIn Feet: 1" = 40'0 20 4080---Project No./CodeSheet RevisionsAutocad Ver. 2020 Scale: As Shown Units: EnglishDWAY PP1 of 1------As Constructed01-27-21 Graphic Scale In Feet: 1" = 50' 0 25 50 100 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 TRAFFIC CONTROL (1) TC 1 of 3 Project No./Code 18 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Traffic Control Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/10/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 Graphic Scale In Feet: 1" = 50' 0 25 50 100 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 TRAFFIC CONTROL (2) TC 2 of 3 Project No./Code 19 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Traffic Control Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/10/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 Graphic Scale In Feet: 1" = 50' 0 25 50 100 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 TRAFFIC CONTROL (3) TC 3 of 3 Project No./Code 20 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Traffic Control Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/10/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 SWMP (1) SWMP 1 of 5 Project No./Code 21 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-SWMP Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 1.SITE DESCRIPTION The Contractor shall comply with all CDOT contractual requirements associated with the CDPS-SCP on this project. The SWMP Administrator shall update to reflect current project site conditions. A.PROJECT SITE LOCATION: S. Midland Ave. from 27th Street to 4-Mile Rd. Glenwood Springs, Garfield County, CO PROJECT SITE DESCRIPTION: The project includes road reconstruction, and construction of a new access driveway on the north side of CR 346. The existing gravel roadway will be replaced in kind with concrete pavement. B.PROPOSED SEQUENCING FOR MAJOR ACTIVITIES: Clearing and grubbing (driveway) Roadway Excavation/Grading Roadway Concrete Paving Driveway Concrete Paving Shouldering Restoration C.ACRES OF DISTURBANCE: Total area of construction site (LOC): 4.0 acres Total area of proposed disturbance (LDA): 3.19 acres Total area of seeding:0.94 acres Total area of impervious surface:2.23 acres Total area of NEW impervious surface: 2.25 acres (0.02 acre increase) EXISTING SOIL DATA: From USDA Web Soil Survey: Halaquepts (19.2%), Heldt Clay Loam (47.7%, Olney Loam(33.1%) D.EXISTING VEGETATION, INCLUDING PERCENT COVER: During design the SWMP Administrator for Design in consultation with the Engineer will determine if the SWMP Administrator for Design or the SWMP Administrator will conduct the Vegetation Transects as outlined in Chapter 4.11.2 of the CDOT Erosion Control and Stormwater Quality Guide. Pre-Construction Date of survey: ______________ %Density: ______________ Description of existing vegetation: Map or table showing transect locations in SWMP notebook tab 17: Post-Construction Date of survey: ______________ %Density: ______________ Description of existing vegetation: Date of CDPS-SCP Closure: ______________ Map or table showing transect locations in SWMP notebook tab 17: E.POTENTIAL POLLUTANTS SOURCES: See First Construction Activities under Potential Pollutant Sources. The SWMP Administrator shall prepare a list of all potential pollutants and their locations in accordance with subsection 107.25. F.RECEIVING WATER: Outfall locations: Colorado River For a complete list of all stormwater outfalls see the drainage tabulation sheets within the plan set. 2. Names of receiving water(s) on site: NA 3. Ultimate receiving water: Colorado River Horizontal distance nearest water of the state is from project: 3100 feet I.NON-STORMWATER DISCHARGES: Potential dewatering* of excavations for construction of retaining walls and culvert extensions ALLOWABLE: Refer to CDPHE Low Risk Discharge Guidance Document of Uncontaminated Groundwater to Land https://www.colorado.gov/pacific/sites/default/files/WQ%20LOW%20RISK%20GW.pdf *If groundwater does not meet water quality standards for receiving water a separate CDPS Dewatering permit shall be obtained by the Contractor from CDPHE in accordance with subsections 107.02 and 107.25. 2.SITE MAP COMPONENTS: Pre-construction A.PROJECT CONSTRUCTION POTENTIAL SITE BOUNDARIES Construction boundaries are generally contained within the limits of disturbance areas. Equipment and material staging may also occur on existing graveled and disturbed areas within the property limits. See the erosion control and site layout plans for additional information. B.ALL AREAS OF GROUND SURFACE DISTURBANCE See the erosion control and site layout plans for limits of disturbance. C.AREAS OF CUT AND FILL See the erosion control and site layout plans for limits of disturbance. D.LOCATION OF ALL STRUCTURAL BMPs IDENTIFIED IN THE SWMP Structural BMP's are located on the erosion control plans. E.LOCATION OF NON-STRUCTURAL BMPs AS APPLICABLE IN THE SWMP Non-Structural BMP's are located on the erosion control plans. F.SPRINGS, STREAMS, WETLANDS AND OTHER SURFACE WATER NA G.PROTECTION OF TREES, SHRUBS, CULTURAL RESOURCES AND MATURE VEGETATION Trees and vegetation to be protected will be as directed by CDOT and will be identified at the preconstruction conference or initial construction meeting. H.AREAS USED FOR STORING AND STOCKPILING OF MATERIALS, STAGING AREAS (field trailer,fueling,etc) and BATCH PLANTS These areas will be identified by the contractor and subject to approval by CDOT. 3.QUALIFIED STORMWATER MANAGERS: A.SWMP ADMINISTRATOR FOR DESIGN: B.SWMP Administrator for Construction: (As defined in Subsection 208) The Contractor shall designate a SWMP Administrator for Construction upon co-permitee of the permit. The SWMP Administrator shall become the operator for the SWMP and assume responsibility for all design changes to the SWMP implementation and maintenance in accordance to 208.03, the SWMP shall remain the property of CDOT. The SWMP Administrator for Construction shall be responsible for implementing, maintaining and revising SWMP, including the title and contact information. The activities and responsibilities of the SWMP Administrator for Construction shall address all aspects of the project's SWMP. (Update the information below for each new SWMP Administrator for Construction) (Copy of TECS Certification must also be included in the SWMP.) C.EROSION CONTROL INSPECTOR: (As defined in Subsection 208) The Contractor may designate an Erosion Control Inspector. The Erosion Control Inspector shall complete duties in accordance with subsection 208.03 (c) (Copy of TECS Certification must also be included in the SWMP.) 4.STORMWATER MANAGEMENT CONTROLS FIRST CONSTRUCTION ACTIVITIES THE CONTRACTOR SHALL PERFORM THE FOLLOWING: A.POTENTIAL POLLUTANT SOURCES Evaluate, identify locate and describe all potential sources of pollutants at the site in accordance with subsection 107.25 CDPS-SCP and place in the SWMP notebook. All control measures related to potential pollutants shall be shown on the SWMP site map by the Contractor's SWMP Administrator for Construction. B.OFFSITE DRAINAGE (RUN ON WATER) Describe and record control measures on the SWMP Site Map that have been implemented to address off site run-on water in accordance with subsection 208.03. C.VEHICLE TRACKING PAD/VEHICLE TRACKING CONTROL Control measures shall be implemented in accordance with subsection 208.04. Name/Title Contact Information Angie Fowler, P.E. / Water Quality Engineer 970-945-1004 / angief@sgm-inc.com Name/Title Contact Information (phone & email)Certification #Start Date Engineer Approval 01-27-21 118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 SWMP (2) SWMP 2 of 5 Project No./Code 22 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-SWMP Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: D.PERIMETER CONTROL 1. Perimeter control shall be established as the first item on the SWMP to prevent the potential for pollutants leaving the construction site boundaries, entering the stormwater drainage system, or discharging to state waters. Perimeter control shall be in accordance with subsection 208.04. 2. Perimeter control may consist of berms, silt fence, erosion logs, existing landforms, or other control measures as approved. 5.DURING CONSTRUCTION RESPONSIBILITIES OF THE SWMP Administrator for Construction The SWMP is a "living document" that is continuously reviewed and modified throughout the construction phasing. During construction, the following items shall be added, updated, or amended as needed by the SWMP Administrator for Construction in accordance with subsection 208.03. During construction, indicate how items that have not been addressed during design are being handled in construction. If items are covered in the template or other sections of the SWMP, indicate below what section the discussion takes place. A.STOCKPILE MANAGEMENT: Shall be done in accordance with subsection 107.25 and 208.07. B.CONCRETE WASHOUT: Concrete wash out water or waste from field laboratories and paving equipment shall be contained in accordance with subsection 208.05. C.SAW CUTTING: shall be done in accordance with subsection 107.25, 208.04, 208.05. D.STREET SWEEPING: shall be done in accordance with subsection 208.04. 6. INSPECTIONS A. Inspections shall be in accordance with subsection 208.03 (c). 7. CONTROL MEASURE MAINTENANCE A. Maintenance shall be in accordance with subsection 208.04 (f). 8. RECORD KEEPING A. Records shall be kept in accordance with subsection 208.03 (d). 9. INTERIM, PERMANENT STABILIZATION and LONG TERM STORMWATER MANAGEMENT The Contractor shall comply with all interim stabilization and permanent stabilization requirements in accordance with subsection 208.04(e). A.SEEDING PLAN Seeding will be required for an estimated 0.94 acres of disturbed area within the project limits which are not surfaced. The following seeding mixture is based on Garfield County Specifications. The Contractor shall verify with the County that this seeding mix is appropriate for project. The following types and rates shall be used: B.SEEDING APPLICATION: Drill seed 0.25 inch to 0.5 inch into the soil. In small areas not accessible to a drill, hand broadcast or hydroseed at double the rate and rake 0.25 inch to 0.5 inch into the soil per subsection 212. Soil compaction shall be minimized for areas where permanent stabilization will be achieved through vegetative cover. C.MULCHING APPLICATION: Apply a minimum of 2 tons of certified weed free native hay or 2 1/2 tons of certified weed free straw per acre and in accordance with Section 213, and mechanically crimp it into the soil in combination with an organic mulch tackifier. 1. Prior to winter shutdown or the summer seeding window closure: Uncompleted slopes shall be mulched with 2 tons of mulching (weed free) per acre, mechanically crimped into the topsoil in combination with an organic mulch tackifier per subsections 208 and 213. D.SPECIAL REQUIREMENTS: 1. Due to high failure rates, hydroseeding will not be allowed for permanent stabilization. E.SOIL CONDITIONING AND FERTILIZER REQUIREMENTS: Minimum requirements for all disturbances to receive seeding (native). *Biological nutrient shall not exceed 8-8-8 (N-P-K). Humate shall be in accordance to 212.02. Humate and compost shall also be approved by Garfield County. F.SOIL RETENTION COVERING: On slopes and ditches requiring a blanket or turf reinforcement mat (trm), the blanket/trm shall be placed in lieu of mulch and mulch tackifier and placed after seeding (native). See Erosion Control Plan for blanket/trm locations. G.RESEEDING OPERATIONS/CORRECTIVE STABILIZATION Prior to partial acceptance. 1. Seeded areas shall be reviewed during the 7 day inspections by the SWMP Administrator for Construction and or Erosion Control Inspector for bare soils caused by surface or wind erosion. Bare areas caused by surface or gully erosion, blown away mulch, etc. shall be re-graded, seeded, and have the designated mulching applied as necessary, at no additional cost to the project. 2. The Contractor shall maintain seeding/mulch/tackifier/blanket/TRM, mow to control weeds or apply herbicide to control weeds in the seeded areas until Partial Acceptance of the stormwater construction work. 10. PRIOR TO PROJECT FINAL ACCEPTANCE A. Partial Acceptance shall be in accordance with subsection 107.25 (d), 208.10 and 214.04. At the Partial Acceptance of the project, it shall be determined by the SWMP Administrator for Construction and the Engineer which temporary control measures shall remain until 70% revegetation is established or which shall be removed. B. At the end of the project, all ditch checks shall either consist of temporary erosion logs (or equivalent) or permanent rip-rap. C. All storm drains shall be cleaned prior to the Final Acceptance of the project. Work shall be included in 202 Clean Culvert. 11. NARRATIVES Control Measure Matrixes During Construction: 1.Control measure narratives have been included for the CDOT Standard Specifications and Standard Plan M-208 and M-216 along with any non-standard control measures approved during the design process. If a Non-Standard Control Measure not included in the SWMP is proposed and approved by the Engineer the SWMP Administrator for Construction shall do the following: Place an “X” in the column for non-standard and complete a Non-Standard Control Measure Specification and Narrative covering the what, when, where and why the control measure is being used shall be add to the SWMP. The appropriate “X” shall also be added to the implementation phase(s). 2. The SWMP Administrator for Construction shall place an “X” in the column In Use On Site when the control measure has been installed. 3. A “P” in the Initial Activities Column indicates that the control measure shall be installed before construction activity starts. Locations and quantities will be discussed during the Environmental Pre-construction Conference with the Regional Water Pollution Control Manager. Soil conditioner paid for as Item 212-Soil Conditioning (Acre) Biological nutrient organic based fertilizer (lbs/acre)* Humate (lbs/acre) Compost (cys/acre) All areas <2:1 (1/2 inch depth) Spray on Amendment (lbs/acre) >2:1 slopes only 300 200 65 3500 COMMON NAME BOTANICAL NAME LBS. PLS PER ACRE Bluebunch Wheatgrass Western Wheatgrass Pascopyrum Smithii Basin Wildrye Leymus Cinereus Mountain Sage Artemesia Tridentata Sandberg's Bluegrass Poa Secunda Side-Oats Grama Boutelous Curtipendula Needle and Thread Stipa Comata Blue Grama Bouteloua Gracilis Galleta Hilaria Jamesii TOTAL 01-27-21 118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 SWMP (3) SWMP 3 of 5 Project No./Code 23 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-SWMP Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: APPLICATION, CONTROL MEASURE NARRATIVE M- STANDARD or "X" for NON- STANDARD IN USE ON SITE CONTROL MEASURE IMPLEMENTATION PHASE INITIAL ACTIVITIES INTERIM ACTIVITIES PERMANENT STABILIZATION PROTECTION OF EXISTING WETLANDS Fence (plastic) and erosion logs Fence (plastic) shall be placed in combination with erosion logs to prevent encroachment of construction traffic and sediment into state waters prior to start of construction disturbances. Fence (plastic) shall be placed adjacent to the wetlands; erosion logs shall be placed between the plastic fence and disturbance area. Logs shall be placed to direct flows away from or filter water running into wetlands from disturbance areas. PROTECTION OF EXISTING TREES/LANDSCAPING Fence (plastic) Fence (plastic) shall be used in areas indicated in the plans to prevent encroachment of construction traffic and sediment for the protection of mature trees and/or existing landscaping prior to start of construction disturbances. CHECK DAM/DITCH CHECK Erosion log, silt berm, silt dike, rock check dam Placed in ditches immediately upon completion of ditch grading to reduce velocity of runoff in ditch. For existing ditches, place prior to start of construction disturbances. M-208 Storm Drain Inlet Protection In Paved Roadways (Type 1, 2 and 3 as shown on M-208-1, sheet 5 of 11) Manufactured storm drain inlet protection placed prior to construction disturbances as detailed in M-208-1, to protect existing inlets or immediately upon completion of new inlets to prevent sediment from entering the inlet throughout construction. M-208 Storm Drain Inlet Protection In Native Seed Areas (M-604 Standard Inlets Type C and D) Erosion logs or aggregate bags placed around inlet grate to prevent sediment from entering inlet. Place prior to construction disturbances to protect existing inlets or immediately upon completion of new inlets. M-208 CULVERT INLET/OUTLET PROTECTION Erosion logs, aggregate bags Placed at mouth of culvert inlets and over top of culvert at inlet and outlet where disturbance may be occurring adjacent to pipe to prevent sediment laden water from entering pipe or drainage. Place prior to start of construction disturbances. M-208 TYPE C, TYPE D AND TYPE 13 PROTECTION Erosion logs, aggregate bags, erosion bales Placed around inlet grate or slope and ditch paving to prevent sediment from entering inlet. Place prior to start of construction disturbances. M-208 STOCKPILE PROTECTION Temporary berm, erosion logs, aggregate bags* Placed within specified distance, in accordance with subsection 208.06, from toe to contain sediment around stockpile. *Aggregate bags are easily moved and replaced for access during the work day. Place prior to start of stockpile, increase control as stockpile increases size. M-208 TOE OF FILL PROTECTION Erosion logs, temporary berm, silt fence, topsoil windrow* Place prior to slope/embankment work to capture sediment and protect and delineate undisturbed areas. *Can be used to stockpile topsoil for salvage. M-208 PERIMETER CONTROL Erosion logs, silt fence, temporary berm, topsoil windrow* Placed prior to construction commencing to address potential run-on water from off site, and to divert around disturbed area. *Can be used to stockpile topsoil for salvage. M-208 X X SEDIMENT CONTROL/SLOPE CONTROL Silt fence, erosion logs Placed on the contour of a slope to contain and slow down construction runoff. Place prior to start of construction disturbances.M-208 X X TEMPORARY SEDIMENT TRAP Used to capture sediment laden runoff from disturbed areas < 5 acres during construction. Place prior to start of construction disturbances. Outlets that withdraw water from or near the surface may be installed when discharging from basins and impoundments. M-208 EMBANKMENT PROTECTION OR TEMPORARY SLOPE DRAIN Placed as a conduit or chute to drain runoff down slope and to prevent erosion of slope.M-208 OUTLET PROTECTION Riprap, or approved other Material placed as energy dissipator to prevent erosion at outlet structure.M-601-12 CONCRETE WASHOUT In-ground or fabricated Construction control, used for waste management of concrete and concrete equipment cleaning. Place prior to start of concrete activities. M-208 X X VEHICLE TRACKING PAD Source control, placed to prevent tracking of sediment from disturbed area to offsite surface. Place prior to start of construction disturbances. M-208 X X Engineered SEDIMENT BASIN Constructed early in project, prior to storm sewer/ditches and in accordance with 208.05(p) to capture storm flow. Outlet structure and/or outfall shall be modified for temporary sediment control using an approved non-standard detail. Outlets that withdraw water from or near the surface shall be installed when discharging from basins and impoundments, unless infeasible DEWATERING (Contractor is responsible for obtaining a permit from Colorado Department of Health and Environment.) Shall be done in such a manner to prevent potential pollutants from entering state waters.TBD TEMPORARY STREAM CROSSING Constructed over stream or drainage to prevent discharge of pollutants from construction equipment into water. CLEAN WATER DIVERSION Placed to divert clean surface or ground water around disturbance area to prevent it from mixing with construction runoff. OTHER STRUCTURAL Control Measures that may be potentially used on the project for erosion and sediment control; practices may include, but are not limited to: 01-27-21 118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 SWMP (4) SWMP 4 of 5 Project No./Code 24 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-SWMP Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: APPLICATION, BMP/CONTROL MEASURE NARRATIVE M- STANDARD or "X" for NON- STANDARD IN USE ON SITE BMP/CONTROL MEASURE PHASING INITIAL ACTIVITIES INTERIM ACTIVITIES PERMANENT STABILIZATION * VEGETATIVE BUFFER STRIP Fence (plastic) Finishing component for filtering sediment-laden runoff from disturbance area. Area within CDOT ROW or temporary easement to be identified on SWMP prior to construction starting. GRADING APPLICATIONS (LANDFORM) Existing or created landforms may be used as a control measure if they prevent sediment from entering or leaving the disturbance area. If a landform directs flow of water to a concentrated outfall point, the outfall point shall be protected to prevent erosion. Area to be identified on SWMP prior to construction starting. M-208 TOPSOIL MANAGEMENT STOCKPILE/SALVAGE Windrow or stockpile Prior to embankment work commencing, existing topsoil shall be scraped to a depth of 4 inches or as specified, and placed in stockpiles or windrows. Upon completion of final grading, topsoil shall be evenly distributed over embankment to a depth of 4 inches or as specified. M-208 X X X SURFACE ROUGHENING / GRADING TECHNIQUES Temporary stabilization of disturbance and to minimize wind and erosion. SEEDING (TEMPORARY)Temporary stabilization used for over wintering of disturbance or used to control erosion for areas scheduled for future construction. BONDED FIBER MATRIX or MULCHING (HYDRAULIC) Not to be used in areas of concentrated flows, i.e. ditch lines. To be for either Interim or Permanent Stabilization placed as a surface cover for erosion control. May be used as surface cover when work is temporarily halted and as approved by the Engineer for stockpiles.X Straw or Hay MULCH/MULCH TACKIFIER Interim or Permanent Stabilization placed as a surface cover for erosion control and or seeding establishment. To be installed as Interim Stabilization as a surface cover when work is temporarily halted and as approved by the Engineer X SPRAY-ON MULCH BLANKET (Not to be used in areas of concentrated flows, i.e. ditch lines.) Interim or Final Stabilization placed as a surface cover for erosion control and or seeding establishment. To be installed as temporary surface cover when work is temporarily halted and as approved by the Engineer SEEDING PERMANENT (NATIVE)Final Stabilization of disturbance and to reduce runoff and control erosion on disturbed areas.X SOIL RETENTION BLANKET (SRB)Final Stabilization of disturbance and to reduce runoff and control erosion on disturbed areas.M-216 TURF REINFORCEMENT MAT (TRM)Final Stabilization of disturbance and to reduce runoff and control erosion on disturbed areas. Placed in channels or on slopes for erosion control, channel liner and seeding establishment. M-216 Sweeping Source control, used to remove sediment tracked onto paved surfaces and to prevent sediment from entering drainage system. Sweep daily and at the end of the construction shift as needed. Kick brooms shall not be permitted. OTHER NON-STRUCTURAL Control Measures that may be potentially used on the project for erosion and sediment control; practices may include, but are not limited to: Erosion control devices are used to limit the amount of soil loss on site. Sediment control devices are designed to capture sediment on the project site. Construction controls are control measures related to construction access and staging. Control Measure locations are indicated on the SWMP Site Map * Use of vegetative buffer strip requirements. The CDPHE Water Quality Control Division Technical Memorandum dated August 27, 2015 clarifies the requirements for utilization of existing vegetation as a buffer type of sediment control measure, while maintaining compliance with the CDPS permit for Stormwater Discharges Associated with Construction Activity - CDPS Permit No. COR4000000. In general, the division does not recommend that vegetated buffers be implemented as a sediment removal control measure for runoff from disturbed areas at construction sites, unless implemented as a “finishing” component of a treatment train comprised of additional, adequate up-gradient Control Measures. The entire memorandum can be found at: https://www.colorado.gov/pacific/sites/default/files/Vegetative%20Buffer%20Memo.pdf 01-27-21 118 West Sixth Street, Suite 200Glenwood Springs, CO 81601970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 SWMP (5) SWMP 5 of 5 Project No./Code 25 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-SWMP Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 12.TABULATION OF STORMWATER QUANTITIES A. BMP sediment removal and disposal but shall be paid for as: 208 Removal and Disposal of Sediment (Equipment) and 2018 Removal and Disposal of Sediment (Labor). All other BMP maintenance shall be included in the cost of the BMP Device. B. It is estimated that 5 hours combination loader (80-125 horsepower) may be required for miscellaneous erosion control work as directed by the Engineer. Work shall be paid for as: 203 Combination Loader. C. Establishment of seeded areas will not be paid for separately, but shall be included in the work. This shall include weed control, reseeding/mulch/tackifier. *It is anticipated that additional control measures and control measure quantities not shown on the SWMP Site Maps shall be required on the project for unforeseen conditions and replacement of items that are beyond their useful service life, see subsection 208.03 and 208.04. Quantities for all control measures shown above are estimated, and have been increased for unforeseen conditions and normal control measure life expectancy. Quantities shall be adjusted according to the conditions encountered in the field as directed and approved by the Engineer. Payment shall be for the actual work completed and material used. **Pay Item 208-00071 is included for anticipated maintenance of vehicle tracking pads based on the service life of the control measure in the field. The use of the material shall be directed and approved by the Engineer. *** F/A refers to CDOT's Force Account Pay Items. 13. BIOLOGIC IMPACTS and DEWATERING A.ENVIRONMENTAL IMPACTS: 1. Wetland Impacts: NO 2. Stream Impacts: NO 3. Threatened and Endangered Species: None B.DEWATERING (Not Covered Under the CDPHE Low Risk Guidance Document of Uncontaminated Groundwater to Land): 1. Dewatering: Refer to other environmental permits in accordance with subsection 107.02 and the permits contained in Tab 16 of the SWMP. 14. NOTES A. Tracked vehicles will not be allowed onto the paved portion of CR 346 or paved roads. Tires of vehicles that will use the the paved portion of CR346 shall be cleaned before traveling on asphalt surfaces. Sweeping shall be performed to maintain clean paved surfaces. Pay Item Description Pay Unit Initial Const. Interim Const. Permanent Stabilization *Total Quantity 203-01594 Combination Loader Hour 5 5 207-00205 Topsoil CY 500 500 207-00210 Stockpile Topsoil CY 500 500 208-00002 Erosion Log Type 1 (12 inch)LF 6824 6824 208-00045 Concrete Washout Structure Each 2 2 208-00207 Erosion Control Management (ECM)Day 45 60 212-00006 Seeding (Native)Acre 0.94 0.94 212-00032 Soil Conditioning Acre 0.94 0.94 213-00003 Mulching (Weed Free)Acre 0.94 0.94 213-00061 Mulch Tackifier LB 188 188 01-27-21 Graphic Scale In Feet: 1" = 50' 0 25 50 100 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 EROSION CONTROL (1) EC 1 of 3 Project No./Code 26 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Erosion Control Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 Graphic Scale In Feet: 1" = 50' 0 25 50 100 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 EROSION CONTROL (2) EC 2 of 3 Project No./Code 27 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Erosion Control Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 Graphic Scale In Feet: 1" = 50' 0 25 50 100 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 EROSION CONTROL (3) EC 3 of 3 Project No./Code 28 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-Erosion Control Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 RiflePit-Signing 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers ____ -- CDOT ACCESS PERMIT #320024 SIGNING & STRIPING Subset Sheets: No.: Code: Sheet Number: No Revisions: Revised: Void: Date Comments Init.Rev. Computer File Information Print Date: 1/26/21 Last Modification Date: 1/25/2021 Quality Control: RN Drawing File Name: SGM Project No.: 2019-341.002 Graphic Scale In Feet: 1" = 50' 0 25 50 100 - - - Project No./CodeSheet Revisions Autocad Ver. 2020 Scale: As Shown Units: English --- --- As Constructed 29SS1 of 1 01-27-21 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 CROSS SECTIONS (1) XSECT 1 of 2 Project No./Code 30 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-XSECT Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers CDOT ACCESS PERMIT #320024 CROSS SECTIONS (2) XSECT 2 of 2 Project No./Code 31 -- -- Sheet Number No Revisions: Revised: Void: As Constructed Drawing File Name: RiflePit-Rdwy-XSECT Date Comments Init.Rev. Sheet RevisionsComputer File Information Print Date: 1/26/21 Last Modification Date: 12/7/2020 RN Autocad Ver. 2020 SGM Project No.: 2019-341.002 Scale: As Shown Quality Control:Subset Sheets: 01-27-21 RiflePit-DwayAT 118 West Sixth Street, Suite 200 Glenwood Springs, CO 81601 970.945.1004 www.sgm-inc.com Engineer: Drawn By: Sheet Subset: JJL JJL Structure Numbers 26 ____ -- CDOT ACCESS PERMIT #320024 WB-50 TURNING MOVEMENT Subset Sheets: No.: Code: Sheet Number: No Revisions: Revised: Void: Date Comments Init.Rev. Computer File Information Print Date: 1/26/21 Last Modification Date: 12/11/2020 Quality Control: RN Drawing File Name: SGM Project No.: 2019-341.002 Graphic Scale In Feet: 1" = 30' 0 15 30 60 - - - Project No./CodeSheet Revisions Autocad Ver. 2020 Scale: As Shown Units: English TURN 1 of 1 --- --- As Constructed 01-27-21 Floodplain Development Permit Narrative for Rifle Pit #1 May 2022 E Attachment E Comprehensive Wetland Delineation Report & Request for Boundary Confirmation SPK# 2020-00172 Prepared for: U.S. Army Corps of Engineers Colorado West Regulatory Office IHC Scott Albuquerque District, Regulatory Division 9200 East Mineral Ave, Suite 400 400 Rood Avenue, Room 224 Centennial, CO 80112 Grand Junction, Colorado 81501-2563 Prepared by: SGM, Inc. 259 Grand Avenue, Suite 200 Grand Junction, CO 81501 2019-341.002 February 28, 2022 www.sgm-inc.com Comprehensive Wetland Delineation Report & Request for Boundary Confirmation Rifle Gravel Pit #1 Garfield County, Colorado Wetland Delineation Report Rifle Gravel Pit #1 February 2022 i Comprehensive Wetland Delineation Report & Request for Boundary Confirmation Rifle Gravel Pit #1 (SPK# 2020-00172) Garfield County, Colorado Prepared for: U.S. Army Corps of Engineers Colorado West Regulatory Office IHC Scott Albuquerque District, Regulatory Division 9200 East Mineral Ave, Suite 400 400 Rood Avenue, Room 224 Centennial, CO 80112 Grand Junction, Colorado 81501-2563 Prepared by: SGM, Inc. 259 Grand Avenue, Suite 200 Grand Junction, CO 81501 Submitted to: Colorado West Regulatory Office U.S. Army Corps of Engineers 400 Rood Avenue, Room 224 Grand Junction, Colorado 81501-2563 Wetland Delineation Report Rifle Gravel Pit #1 February 2022 ii Contents 1. APPLICANT AND SITE INFORMATION ........................................................................................................... 1 Wetland Delineation Report Rifle Gravel Pit #1 February 2022 1 1. APPLICANT AND SITE INFORMATION IHC Scott (formerly Scott Contracting Inc.) requested that SGM delineate all potential wetlands and other Waters of the U.S. for a gravel pit development project in Garfield County, Colorado. The project would be new development, located on the site of an existing cattle pasture which has been irrigated up until 2021. The parcel is divided by an irrigation tailwater ditch that carries agricultural return flows to a discharge point on the Colorado River. IHC Scott is proposing partial development of the parcel, with the intention of confining the pit infrastructure to upland portions of the property and entirely avoiding direct impacts to jurisdictional wetlands and Waters of the U.S. (WoUS) on the property. There are anticipated to be no regulated impacts as a result of the proposed activity. The conceptual outline of the proposed development is discussed in this report, but is not addressed in depth report. This report has been prepared in accordance with regulatory guidance for submittal to the U.S. Army Corps of Engineers (USACE) to request a wetland boundary confirmation without accompanying jurisdictional determination. A No Permit Required letter is not requested at this time. This report has been submitted to assist in planning and communication between IHC Scott and regulatory agencies, primarily the USACE, but also Garfield County. Wetland Delineation Report Rifle Gravel Pit #1 February 2022 2 · The findings of the August 13, 2021 ARDR were rejected, and a resubmittal was requested that would use the transect-based approach and incorporate Problematic Hydric Soils procedure into the boundary determinations. Wetland Delineation Report Rifle Gravel Pit #1 February 2022 3 Wetland Delineation Report Rifle Gravel Pit #1 February 2022 4 2. PROJECT DESCRIPTION IHC Scott is proposing to construct a new gravel pit development project in Garfield County, Colorado. The project would be new development, located on the site of a cattle pasture receiving irrigation return flows; the pastures are not intentionally irrigated at this time but have been in the recent past (Figures 1 and 2). The applicant is proposing partial development of the parcel, with the intention of confining the pit infrastructure only to upland portions of the property (generally the eastern portion), and entirely avoiding direct impacts to jurisdictional wetlands and WoUS (generally on the western portion of the property). The subsurface conditions are typical of gravel pits and aggregate mines in the Colorado River floodplain: the surface layer consists of between one and seven feet of alluvially-deposited fine sediments (primarily silts and clays), overlying 17-22 feet of alluvial gravels. Shallow groundwater, connected to the water table of the Colorado River, saturates the gravels and is generally present throughout the project site at a depth of between one and five feet. These assessments are based on exploratory subsurface drilling work from 2008 (Appendix E). The proposed development would be a wet mining operation. In wet mining operations of the type IHC Scott proposes, the overburden is removed and stockpiled for onsite use or sale as topsoil, and the saturated alluvial gravels are excavated in their saturated state using a long-reach excavator. No dewatering activity or groundwater pumping occurs, and the excavated pit fills with groundwater to become a pond as mining progresses through the site. This is in contrast to a typical aggregate mine operation, where dewatering (generally through pumping) lowers the groundwater and then the pit is excavated with machinery in the bottom of the pit, and after operations are complete the dewatering stops and the pit is allowed to fill with groundwater to become a pond. A very brief conceptual description of the proposed mining plan is included here for reference. Note that permit applications with the Division of Reclamation, Mining, and Safety (DRMS) and Garfield County Community Development are both in process and specific operational details of this project may be subject to change based on feedback from these agencies. · A paved access apron would be constructed to access the project site from the Interstate- 70 frontage road. CDOT has reviewed the plans and issued an access permit to allow for this construction. · A processing and sales facility (scale house) would be constructed at the entrance to the project site. This would include the material stockpiles, loading chute and processor, the scale house, vehicle parking, and the minimal facilities needed onsite staff (portable toilets, water tank, work trailer). · The overburden (1-7 ft of fine sediments) would be removed from the mine area. The overburden would be used to construct a 5-ft tall perimeter berm around the mine area, to control visual and noise impacts in accordance with Garfield County Land Use Code (LUC) standards. The outer edge of the perimeter berm would be located 25 feet from the boundary of any wetland areas, pending approval of a variance from the 35-foot wetland setback in the LUC. The berm surface would be stabilized and re-seeded to control erosion. Any remaining overburden material would be stockpiled at the processing facility for sale as topsoil. Wetland Delineation Report Rifle Gravel Pit #1 February 2022 5 · The working surface of the mine would consist of the exposed alluvial gravel surface. A long- reach excavator stationed on the edge of the pit would excavate material to a depth of approximately 20 feet. The pit would be full of water, forming a pond that expands as the excavator continues to remove material, and which is in direct contact with the water table of the Colorado River via lateral migration through the underlying permeable gravels. Excavated material would be piled on the edge of the pond for approximately 24 hours, to allow drainage of free water from the material and back into the pond. · Sideload dump trucks would travel to the pond edge, and would be loaded with the dried material on a daily basis. The dump trucks would transport the dried material from the active excavation area to the processing facility, where the material would be stockpiled for washing, processing, and subsequent sale. · Any agricultural return flows in the tailwater ditch, which are estimated at less than 2 cfs during peak irrigation season, would be discharged into the pond. The discharge would mix with the alluvial aquifer waters which are exposed in the pond, and the combined waters would migrate laterally through the underlying permeable gravels into the larger Colorado River water table. Given the minimal flows in the ditch, the large size of the pond (estimated at 6 acres within the first year of operation), and the highly-permeable nature of the gravel, the agricultural return flows would have a negligible effect on water levels in the pond. As excavation proceeds, the eastern portions of the tailwater ditch, which is artificially excavated in an upland area, would be subsumed into the expanding pond boundaries, until under final conditions the discharge point would be where the ditch enters the eastern boundary of the property. · Reclamation would proceed in concert with the excavation. A six-foot wide fringe of gentle slopes (e.g., 5:1 slopes) would be left at the inner edge of the perimeter berm, and planted with wetland reclamation species. The intention is for the six-foot wide fringe to be nearly inundated during high-water periods as the water table rises, and then to be progressively exposed as the water table drops during the course of the growing season. Note that this draft reclamation effort is in compliance with Garfield County LUC standards, and is not intended to serve as formal wetland mitigation per USACE standards. · At this time, the proposed mine would operate daily, with excavation and processing occurring eight months of the year (roughly April – May) and with material sales occurring year-round. Total recoverable volume is estimated at approximately 300,000 cubic yards of aggregate, which is expected to support operations for between three and five years. Details of the proposed operation have been provided to both Garfield County and the Colorado Division of Reclamation, Mining, and Safety (DRMS). The final planning for the project is still being developed with a land use development permit currently in review with Garfield County and a mining plan in review with DRMS. However, under no foreseeable circumstances would the operating area of the mine be extended into areas that have been mapped as wetlands. To determine regulatory authority over the proposed project, a delineation of wetlands and Waters of the US was conducted in accordance with the USACE 1987 Wetland Delineation Manual and the Arid West regional supplement. The site assessment included the entire parcel, although the focus Wetland Delineation Report Rifle Gravel Pit #1 February 2022 6 and the Comprehensive Delineation was on the portion of the site where development could potentially occur, and did not extend to the small “panhandle” on the northeast corner of the property. There are a total of 1.13 acres of non-wetland open water within the parcel (all associated with the artificially-excavated tailwater ditch), and a total of 18.28 acres of wetlands were delineated within the parcel. Irrigation waters from the ditch clearly provide some portion of the hydrology supporting the wetland complex. However, shallow groundwater associated with the Colorado River floodplain and water table are also assumed to be partially supporting wetland conditions. No attempt has been made to conclusively determine the extent of agricultural water support of the wetlands on the parcel, and no discussion of jurisdictional status is included in this report. This request is solely for a Boundary Confirmation of the mapped wetland areas, irrespective of potential jurisdictional status, and IHC Scott intends to avoid direct impacts to all wetlands regardless of jurisdictional status. Note that IHC Scott’s proposed development plan does involve impacts to the tailwater ditch (see Appendix A). These impacts would qualify as exempt activities under the Clean Water Act (CWA) Section 404(f)(1)(C) exemptions for the construction and maintenance of jurisdictional ditches. This contention is based on the following points: · The tailwater ditch is a “constructed or excavated channel used to convey water,” in this case one that conveys irrigation waters from their place of use to a discharge point into natural waters (the Colorado River). It therefore qualifies as an irrigation ditch under 85 FR 22250. · The purpose of IHC Scott’s diversion of the ditch waters into their excavated pond is to ensure the continued function of the ditch, which is the discharge of irrigation return flows to receiving waters. There are no downstream users or water right holders on the ditch; IHC Scott’s obligation as owner of the ditch is to ensure that the irrigation return flows reach the Colorado River. · IHC Scott’s revision of the ditch design would not include any areas of the ditch that currently host abutting or adjacent wetlands. This is in recognition of the fact that the wetlands may also be supported by natural hydrology. IHC Scott intends to alter only that portion of the ditch that is clearly an artificial channel excavated in uplands with no adjacent wetlands (see Appendix A). No direct impacts to any wetlands would occur as a result of the ditch work. · Part 1 of the recapture provision (CWA Section 404(f)(2)) would not apply to this work because there is no intention to convert any area of WoUS to a use to which it was not previously subject. There are no impacts to wetlands, no conversions of wetlands to new uses, and no degree of piping the ditch. In fact, the express purpose of the ditch alterations is to avoid impacts to the wetlands while continuing to fulfill the requirement to discharge the irrigation return flows. · In addition, Part 2 of the recapture provision (CWA Section 404(f)(2)) would not apply to this work because there would be no impairment to the flow or circulation of WoUS. The natural hydrology supporting the wetlands on the western portion of the property would not be altered, since the proposed mine would not alter the current conditions under which shallow groundwater passes under the site, through permeable gravels, and proceeds to Wetland Delineation Report Rifle Gravel Pit #1 February 2022 7 downstream waters. In addition, the existing agricultural waters that may be partially supporting the wetlands would continue to be available, given their discharge into the pond and incorporation into the shallow groundwater on the site. This discussion tiers to and relies upon the definitions and procedures jointly laid out by the USACE and the U.S. Environmental Protection Agency concerning the applicability of ditch exemptions (EPA 2020). This report has been prepared in accordance with regulatory guidance for submittal to the USACE to request a wetland boundary confirmation. No nationwide permit is requested at this time. This report has been submitted to assist in planning and communication between IHC Scott and the regulatory agencies, primarily the USACE, but also Garfield County. Wetland Delineation Report Rifle Gravel Pit #1 February 2022 8 3. PROJECT AREA DESCRIPTION The primary vegetation type across the Project area is historically irrigated pasturelands. Historic aerial photography shows the parcel had been flood irrigated for many years. With changes in utilization of the agricultural land, the extent and amount of irrigation has expanded and contracted over the past several decades. There are irrigation ditches and irrigation flows on the parcel that at one time were directed toward supporting pasture vegetation, and they have not been consistently used in the last two seasons since IHC Scott acquired the property. There are also discharges from the irrigation tailwater ditch which terminates on the property, where it discharges agricultural water to flow in a naturalized channel to an eventual confluence with the Colorado River. These surface inputs are contributing to the extent of wetlands on the property. However, the surface of the parcel is also elevationally very close to the Colorado River, and it is assumed that elevated ground waters are contributing to the support of wetlands as well. The pasturelands are dominated by agricultural graminoids and ruderal weeds. There is minimal evidence of recent seeding or other direct management, and some representative dominant species include common timothy (Phleum pratense – FACU), inland saltgrass (Distichlis spicata – FAC), alkali sacaton (Sporobolus airoides – FAC), white goosefoot (Chenopodium album - FACU), and chicory (Cichorium intybus – FACU). Russian olive (Elaeagnus angustifolia – FAC) is a dominant component in portions of the parcel, generally in transition areas between pastures and wetlands. The wetland communities grade generally from east to west, from occasionally saturated areas dominated by arctic rush (Juncus balticus – FACW), timothy, and saltgrass, through seasonally saturated wetland meadows dominated by sedges (Carex spp.) and arrowgrass (Triglochin maritima – OBL), and into perennially flooded marshes dominated by obligate emergent species such as bulrush (Schoenoplectus spp.) and cattail (Typha latifolia). Using data from the nearest weather station (Rifle), recorded temperatures for the reporting period (1910 to 2009) range from an average low of 9 degree Fahrenheit (˚F) in January to an average high of 90˚F in July. Average annual precipitation of 11.6 inches consists primarily of winter snows, and summertime rain precipitation events (Western Regional Climate Center [WRCC] 2021). Typical conditions in the upland part of the property. Bulrush and Juncus wetlands on the property. Wetland Delineation Report Rifle Gravel Pit #1 February 2022 9 Wetland Delineation Report Rifle Gravel Pit #1 February 2022 10 Figure 1: Vicinity Map Wetland Delineation Report Rifle Gravel Pit #1 February 2022 11 Figure 2: Topographic Map Wetland Delineation Report Rifle Gravel Pit #1 February 2022 12 4. WETLAND & WATERS DELINEATION IHC Scott contracted with SGM for the delineation of all potential wetlands and WoUS on the parcel to assist with project planning and development. As summarized in Section 1 and described in more detail below, a comprehensive delineation has been performed at the request of the USACE, incorporating 18 transects spaced at 100-ft intervals, resulting in collection of 188 WDDF data points. All delineations and assessments were completed by SGM’s Senior Ecologist Alex Nees, a certified wetland delineator, with the assistance of SGM’s Eric Petterson, also a certified wetland delineator Wetland Delineation Report Rifle Gravel Pit #1 February 2022 13 NWI. Due to the subtle and variable conditions of surface water conditions, all wetlands were categorized simply as PEM wetland type. In addition to the PEM wetlands, one other WoUS type was delineated on the parcel: · R3UBHx (Riverine, Upper Perennial, Unconsolidated Bottom, Permanently Flooded, Excavated) o This feature is the open water found in the tailwater ditch. The ditch was mapped in NWI as PEM1F, but it appears that ongoing maintenance dredging has continually removed emergent vegetation in the majority of the channel and preserved open- water conditions. See Figure 3: National Wetland Indicator Map, and Figure 6: Delineated Wetlands to compare NWI mapping to the field delineation. SSURGO Soil Review SGM reviewed the Soil Survey Geographic Database (SSURGO, Figure 4) which indicated the presence of four soil types within the parcel. The mapped soil unit boundaries were found to be roughly accurate, although soil texture did vary widely, likely as a result of the combination of past agricultural treatments and historic flood deposition/scouring events. · Halaquepts, nearly level: This soil type dominates the western half of the property. It is a saline soil type that experiences both a seasonal high water table and a period in which evapotranspiration brings salts to the soil surface (USDA 2015). It is classed as moderately to strongly saline, and is a hydric soil type. The halaquepts on the site are likely derived from the local loams and sandy loams, but have been modified by the high water table and evapotranspirative demand. The reported alkalinity of this soil is Moderately to Strongly Alkaline, qualifying it as a problematic hydric soil per the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Arid West (USACE 2010). · Wann sandy loam, 1-3% slopes: This soil type surrounds the eastern portion of the tailwater ditch on the property. It is a poorly-drained alluvial deposit that is non-saline to slightly saline. It is similar to the halaquepts, but does not experience the seasonal high water table and evapotranspiration necessary to concentrate salts at the soil surface. It is a hydric soil type. · Kim loam, 3-6% slopes: This soil type is limited to the northeast corner of the property. It is also an alluvial deposit, but is well drained and does not have a high water table. Salinity is negligible and it is not a hydric soil type. · Olney loam, 1-3% slopes: This soil type is limited to the southeast corner of the property. It is very similar to Kim loam, being an alluvial deposit that is well drained and does not have a high water table. It may be very slightly saline. It is not a hydric soil type. In summary, the soil review indicated that the project site is entirely dominated by loam deposits overlying the alluvial gravels. The low-lying areas on the west end of the property are moderately to strongly saline due to seasonal saturation/inundation and a strong evapotranspirative pump that brings salts to the surface. Other portions of the site that do not experience Wetland Delineation Report Rifle Gravel Pit #1 February 2022 14 saturation/inundation are not notably saline. These mapping results were generally confirmed by field investigations, and also correspond to the findings of some investigatory sub-surface drilling logs (Appendix E). Wetland Delineation Report Rifle Gravel Pit #1 February 2022 15 b. The pH of the soil was measured at depths of 2-inches, 6-inches, and occasionally 12-inches if more conclusive results were needed. Measurements were taken using a digital pH meter with a resolution of 0.1 pH and automatic temperature calibration (Bluelab Soil pH Pen). The pen was calibrated using reference pH solutions on a weekly basis during the delineation effort, and was stored in pH-neutral storage solution when not in use. pH measurements are recorded on all WDDFs. c. Data points where the soil returned a pH value of 7.9 or higher qualified as “Moderately to Very Strongly Alkaline Soils” per the Arid West Manual. In these settings hydric indicators may not form because the alkalinity reduces the ability of iron and manganese to enter solution and form recognizable indicators. At these data points, the “Other” indicator under Problematic Hydric Soils was marked, and soils were not further evaluated, as they were assumed to be Hydric. d. The procedure for Problematic Hydric Soils determination was followed (USACE 2010). Data points where soil pH was 7.9 or greater were considered to be wetlands if hydrophytic vegetation and wetland hydrology indicators were present, regardless of the observed presence of hydric soil indicators. e. For data points with soil pH of less than 7.9, the standard wetland delineation protocol was followed. The soil column excavated by the auger was evaluated for the presence of hydric indicators. The plant species at the data point were recorded and used to determine whether hydrophytic vegetation was present, and hydrology was evaluated using direct observation of the auger hole, in combination with evaluation of the primary and secondary hydrology indicators. f. In summary, data points that indicated the presence of hydrophytic vegetation, hydric soils OR a pH of 7.9 or greater, and wetland hydrology, were coded as wetlands. 5. Based on the WDDF findings, the data points were coded as Wetland or Non-wetland in the GIS. The delineation team then mapped the wetland boundaries displayed in Figure 6 in the field using a sub-meter accuracy GPS, accounting for the data point findings and the totality of observations from the site. This mapping is presented in Figure 6, and represents the wetland boundaries for which SGM is seeking a Boundary Confirmation, based on compliance with the Comprehensive Determination method as modified per the guidance in the Arid West Regional Supplement. Of note, alpha, alpha-dipyridyl dye was applied to saturated soils on a test basis, on numerous occasions. In no case was the dye found to be a reliable indicator of the presence of reduced iron in the soil, either in high-pH situations or in cases of obvious reducing conditions. Wetland Delineation Report Rifle Gravel Pit #1 February 2022 16 Figure 3: National Wetlands Inventory Wetland Delineation Report Rifle Gravel Pit #1 February 2022 17 Figure 4: SSURGO Soil Type Wetland Delineation Report Rifle Gravel Pit #1 February 2022 18 Wetland Delineation Report Rifle Gravel Pit #1 February 2022 19 were delineated within the parcel, all of which are considered potentially jurisdictional and would be avoided by IHC Scott’s development plan (Figure 6, and Appendix A). 1.13 acres of non-wetland WoUS associated with the open water of the tailwater ditch were also delineated. The tailwater ditch is artificially excavated and carries irrigation waters from their point of entry on the eastern edge of the parcel towards the discharge point along the western edge of the parcel. However the ditch is set within the floodplain of the Colorado River and has a discharge to the Colorado River. Based on these factors the tailwater ditch has a nexus to a WoUS and Traditionally Navigable Waterway (TNW), and is considered to be potentially jurisdictional. A wetland delineation map (Figure 6) depicts the Investigation Area (i.e., the parcel boundaries), the wetland boundaries, and the location of all aquatic resources noted during the survey. 188 WDDF points were established during the survey to clarify and support the wetland boundary delineations, and the data forms are included in Appendix B. Tailwater Ditch (R3UBHx) The tailwater ditch in this area supports and abuts a wetland fringe as shown on Figure 6; the wetland fringe generally occurs in the western portions of the property. Where no abutting wetlands are mapped, ongoing dredging/maintenance activities, and steep banks along the irrigation ditch have prevented the establishment of wetland vegetation in the ditch. The banks are clearly defined by the artificial excavation line, transitioning directly from open water to mesic pasture conditions. Therefore, the ordinary high water mark (OHWM) was delineated as the boundary for this non-wetland WoUS feature. Emergent Wetlands (PEM) Areas of emergent wetlands (PEM) within the Investigation Area are associated with irrigation waters and with low-lying areas that may have natural subsurface hydrology (Figure 6). Wetland Delineation Report Rifle Gravel Pit #1 February 2022 20 Vegetation: The wetland communities grade generally from east to west, from mesic and occasionally saturated areas dominated by arctic rush (Juncus balticus – FACW), common timothy (Phleum pratense – FACU), and inland saltgrass (Distichlis spicata – FAC), through seasonally saturated wetland meadows dominated by a number of sedges (Carex spp.) and arrowgrass (Triglochin maritima – OBL). Western portions of the parcel are perennially flooded marshes dominated by obligate emergents such as bulrush (Schoenoplectus spp.) and cattail (Typha latifolia). Soils: The soil conditions have been described in detail in Section 4.1.2 and Section 4.2. In general, the soil pits associated with each data point generally corresponded to the SSURGO mapping. The majority of the mapped wetland areas are within the halaquept zone or adjacent to it. However, the soil pH was not consistently 7.9 or greater within the halaquept zone, and a large portion of the data point determinations rested on typical hydric soil indicator presence. In general, soils pits inside the wetland boundary showed evidence of anaerobic, redox conditions, most commonly with a depleted soil matrix consistent with the Depleted Matrix indicator (Indicator F3). Soil pits outside the wetland boundary generally lacked hydric soil indicators within the upper 12 inches of soil, although redox traces were commonly observed at greater depths. The observed conditions strongly suggest that the mapped wetlands on the property are saturated or have standing water for a significant portion of the growing season. Soils outside the wetland boundaries have seasonally shallow groundwater, but not for a sufficient period to generate redox conditions within the upper 12 inches of the soil. Hydrology: At the boundary of the wetland areas, hydrology indicators were generally secondary indicators only, including visible saturation on imagery, dry-season water table, and a positive FAC- Neutral Test. Hydrology was obvious in areas with soil saturation and standing water. During the course of several visits to the site, surface water and saturation was observed to be relatively stable and constant in extent (aside from where trespass irrigation waters discharged from the property to the north were halted when the ditches were maintained). Some areas that were mapped as wetlands displayed cracked soils and salt crusts consistent with depressional ponding and Indicators B6 and B11. Wetland Delineation Report Rifle Gravel Pit #1 February 2022 21 Table 1. Summary of Waters of the U.S. and Wetlands in Investigation Area Name Jurisdiction Flow Frequency Receiving Water Proximity Size (acres) Last Chance Tailwater Ditch WoUS – R3UBHx Potentially Jurisdictional Perennial Colorado River Tributary 1.13 TOTAL NON-WETLAND WoUS 1.13 Wetland A PEM Potentially Jurisdictional Semipermanent Colorado River Adjacent 2.05 Wetland B PEM Potentially Jurisdictional Seasonal Colorado River Adjacent 0.14 Wetland C PEM Potentially Jurisdictional Seasonal Colorado River Adjacent 0.02 Wetland D PEM Potentially Jurisdictional Seasonal to Semipermanent Colorado River Adjacent 6.00 Wetland E PEM Potentially Jurisdictional Semipermanent Colorado River Adjacent 9.86 Wetland F PEM Potentially Jurisdictional Ephemeral Colorado River Adjacent 0.21 TOTAL WETLANDS 18.28 Wetland Delineation Report Rifle Gravel Pit #1 February 2022 22 Figure 5: Comprehensive Delineation Study Design Wetland Delineation Report Rifle Gravel Pit #1 February 2022 23 Figure 6: Delineated Aquatic Resources Wetland Delineation Report Rifle Gravel Pit #1 February 2022 24 5. FEDERALLY LISTED THREATENED OR ENDANGERED SPECIES At this time, IHC Scott is only requesting a Boundary Confirmation, with the intention of completely avoiding impacts to the wetlands on the property. Based on this avoidance directive from IHC Scott, SGM has not identified any other federal nexus for the project at this time. A brief discussion of federally listed species follows here, to inform the USACE and the planning process. Seven federally listed species and one Candidate species were evaluated for their occurrence on or adjacent to the parcel, per the USFWS Threatened and Endangered species list provided by the IPaC database (USFWS 2022). Based on this analysis, the USFWS identified the Mexican spotted owl (Strix occidentalis lucida), yellow-billed cuckoo (Coccyzus americanus), bonytail chub (Gila elegans), Colorado pikeminnow (Ptychocheilus lucius), humpback chub (Gila cypha), razorback sucker (Xyrauchen texanus), monarch butterfly (Danaus plexippus), and Ute Ladies’-tresses (Spiranthes diluvialis) as potentially occurring in the area. Mexican Spotted Owl – Threatened. This species occurs in closed canopy conifer forests and deeply incised canyons in desert habitats. The project area is outside of the range of this species, and there are no canyons or coniferous habitats in the project area. There is no likelihood that Mexican spotted owls forage in the project area, given a lack of suitable habitat of any type. This project would have no effect on the Mexican spotted owl or their habitats. Yellow-billed Cuckoo - Threatened. This species occurs in dense riparian habitats with cottonwood (Populus deltoides) overstories with dense understory shrubs near rivers. The project area occurs at the edges of the general range of yellow-billed cuckoo but is located outside any mature riparian woodland habitats. The site is dominated by Russian olive and pasture conditions, and is heavily grazed with minimal shrub cover. No mature riparian woodland/shrubland habitat suitable for the species occurs on the parcel. There are no known occupied habitats in the near vicinity and no records of cuckoo occurring in the greater area; it is highly unlikely that cuckoos forage in the project area, given a lack of suitable riparian habitats. This project would have no effect on the cuckoo or their habitats. Colorado River Endangered Fish - Endangered. The USFWS identified the bonytail chub, Colorado pikeminnow, humpback chub and the razorback sucker as potentially occurring or being affected from activities on the parcel. These species occur in lower elevation, larger rivers associated with the Colorado River. The Colorado pikeminnow and razorback sucker have mapped Critical Habitat extending up the Colorado River to the Highway 13 bridge in Rifle. Potential activities on the parcel would not occur in the Colorado River and would not discharge sediments into the river; the parcel is approximately five river miles upstream from designated Critical Habitat. The project would result in minor water depletions as a result of increased evaporative losses from the surface of the dredged pond as compared to current conditions. IHC Scott is required to develop a Supplementary Water Supply Plan (SWSP), which would replace those losses with releases to the Colorado River from other water rights held by IHC Scott. As a result of the SWSP, there would be no indirect loss in in-stream flows as a result of the project. The project would also be required to implement a stormwater management plan, in compliance with DRMS regulations Wetland Delineation Report Rifle Gravel Pit #1 February 2022 25 as well as for Garfield County LUC standards. This would mitigate the risk of significant sedimentation impacts to these fish. Due to the requirement to provide supplementary water to offset evaporative losses, as well as implementation of stormwater controls, it is not anticipated that the project would result in any measurable or meaningful impacts to occupied habitats downstream or would measurably or meaningfully impact the listed fish. Given these factors, activities on the parcel would have no effect for the listed Colorado River endangered fish species and their Critical Habitats. Monarch butterfly – Candidate. Candidate species are not afforded full protection under the ESA; however, the USFWS encourages their consideration in environmental planning, and the USFWS regulatory guidance indicates that Candidate species should be treated similarly to Proposed Species with regard to inter-agency consultation requirements. Informal consultation is requested when a provisional “is likely to jeopardize” determination is reached for a Candidate species (USFWS 1998). Monarch butterfly adults feed (gather nectar) from a variety of flowering plant species. However, the monarch butterfly only lays eggs and larvae only feed on milkweeds (Asclepias spp.). The western population overwinters in various coastal sites in central and southern California, and central populations overwinter in Mexico. Monarchs have multiple generations during their migrations; the second, third and fourth generations return to their northern locations in the United States and Canada in the spring. The project area contains migratory and overwintering habitat for the monarch butterfly. Showy milkweed (Asclepias speciosa) is an abundant component of the vegetation in the transitional zones along the boundaries of the wetland areas. Adult butterflies and several monarch caterpillars were observed feeding on milkweeds at the western edge of the property. Western Colorado is not part of a major monarch migration corridor, but the site is being used by migrating adults and as a potential overwintering site for the dispersed population in the area. Proposed development would mostly occur outside the mesic/wetland meadows where the majority of milkweed is located, therefore direct impacts to host plants and habitats would be mostly avoided. The project would result in the complete loss of vegetation from approximately 20 acres of the property, which would result in potential direct impacts to chrysalis and caterpillars and reduce the foraging vegetation available to adult butterflies. This may result in minor, localized impacts to migrating monarch butterflies, and may reduce the attractiveness of the site as an egg- laying site. Development of the parcel is not likely to jeopardize this Candidate species, as the project may affect individuals but is not expected to alter the species’ overall range and life history patterns. USFWS consultation is not required by ESA for Candidate species where an action is not likely to jeopardize the species’ existence. Ute Ladies’-Tresses - Threatened. The project area occurs outside the known range of the Ute ladies’-tresses orchid, and is a significant distance from the nearest known populations in the Roaring Fork Valley. The parcel does contain wet meadow conditions that are potentially suitable habitat for the species, although similar habitats in the Colorado River valley have been searched Wetland Delineation Report Rifle Gravel Pit #1 February 2022 26 repeatedly and no orchids have ever been located. The potential habitats on the parcel have been incidentally evaluated by a trained and experienced orchid surveyor in the course of wetland assessments, and no orchids have been located. However, no systematic survey meeting USFWS standards has been undertaken on the parcel at this time. Activities on the parcel are not expected to directly impact effective habitats since the wetland areas would be avoided, and as previously discussed the project would not substantially change the existing hydrology that supports these wetlands. Given the location outside of the known range, and the avoidance of impacts to potentially-suitable habitat, activities on the parcel would have no effect on the Ute ladies’-tresses orchid. Wetland Delineation Report Rifle Gravel Pit #1 February 2022 27 6. REFERENCES Colorado Parks and Wildlife (CPW). 2020. Recommended Buffer Zones and Seasonal Restrictions for Colorado Raptors (2020). Available at: https://cpw.state.co.us/Documents/WildlifeSpecies/LivingWithWildlife/Raptor-Buffer- Guidelines.pdf Environmental Protection Agency (EPA). 2020. Joint Memorandum to the Field between the U.S. Department of the Army, Corps of Engineers and the U.S. Environmental Protection Agency concerning exempt construction or maintenance of irrigation ditches and exempt maintenance of drainage ditches under Section 404 of the Clean Water Act. Available at: https://www.epa.gov/sites/default/files/2020- 07/documents/final_ditch_exemption_memo_july_2020_with_epa.pdf Lichvar, R.W., D.L. Banks, W.N. Kirchner, and N.C. Melvin. 2016. The National Wetland Plant List: 2016 wetland ratings. Phytoneuron 2016-30: 1-17. Published 28 April 2016. ISSN 2153 733X Natural Resource Conservation Service. 2017. SSUGO Database. National Resource Conservation Service (NRCS). 2021. Web Soil Survey. Available at: https://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/?cid=nrcs142p2_053627 United States Army Corps of Engineers (USACE), Environmental Laboratory. 1987. Corps of Engineers Wetland Delineation Manual. Wetlands Research Program Technical Report Y-87-1. USACE. 2008. Environmental Laboratory, Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Arid West Region (V.2, ERDC/EL TR-08-28). US Army Engineer Research and Development Center. Vicksburg, MS. USACE. 2005. Regulatory Guidance Letter No. 05-05. Ordinary High Water Mark Identification. December 7, 2005. United States Department of Agriculture (USDA), Soil Survey Staff. 2015. Illustrated guide to soil taxonomy, version 2. U.S. Department of Agriculture, Natural Resources Conservation Service, National Soil Survey Center, Lincoln, Nebraska. USDA. 2021. U.S. Drought Monitor, July 20, 2021. Available at: https://droughtmonitor.unl.edu/Maps/MapArchive.aspx. Accessed August 2021. U.S. Fish and Wildlife Service (USFWS). 1998. Endangered Species Consultation Handbook: procedures for conducting consultation and conference activities under Section 7 of the Endangered Species Act. Washington, D.C. Published March 1998. United States Fish and Wildlife Service (USFWS). 2022. Information for Planning and Consultation (IPaC). Available at: https://ecos.fws.gov/ipac/. Accessed January 2022. Western Regional Climate Center. 2019. Regional Climate Summaries. Available at: http://www.wrcc.dri.edu/. Accessed August 2021.