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Home My WebLink About1.00 General Application Materials 85 South 200 East Vernal, Utah 84078 o: 435.789.1017. x: 435.789.1813 www.uintahgroup.com UTAH | COLORADO | WYOMING | NORTH DAKOTA | MONTANA | KANSAS | OKLAHOMA | TEXAS | NEW MEXICO November 27, 2023 Garfield County Community Development Planning Division Attn: Philip Berry 108 8th Street, Suite 401 Glenwood Springs, CO 81601 Re: Administrative Review Land Use Change Permit Chevron U.S.A. Inc. – Skinner Ridge Laydown Yard Sec. 36, T5S, R98W, 6th PM AIN: 2137-321-00-0008 Dear Mr. Berry, Our company, Uintah Engineering & Land Surveying (UELS, LLC), on behalf of Chevron U.S.A., Inc. submits the enclosed Administrative Review Land Use Change Permit for the proposed Skinner Ridge Laydown Yard within unincorporated Garfield County. The project will consist of the construction and use of a storage/laydown yard to support oil & gas drilling and development activities in the Skinner Ridge area. The well pad is located approximately 19.6 miles north of De Beque, CO along Clear Creek Road (CR 211) in unincorporated Arapahoe County. The proposed laydown yard will be located in the west one-half of Section 36, Township 5 South, Range 98 West, 6th P.M. on privately owned land by Chevron U.S.A., Inc. The current zoning for the parcel is Resource Lands. The existing land use is grazing-land and agriculture-land. Enclosed in this submittal, please find three (3) copies of all application forms and supporting documents. An electronic version of this application has been submitted via email to your attention to the following address: pberry@garfield-county.com. If you have any concerns or comments regarding this pre-submittal, please call me at (435) 789-1017. Sincerely, Amy Doebele Director of Permitting Services UELS, LLC 85 S 200 E Vernal, UT 84078 o. (435) 789-1017 d. (435) 247-1401 adoebele@uintahgroup.com enclosures AD/ad CERTIFICATION OF MINERAL OWNER RESEARCH This form is to be completed and submitted with any application for a Land Use Change Permit. Mineral interests may be severed from surface right interests in real property. C.R.S. § 24-65.5-101, et seq, requires notification to mineral owners when a landowner applies for an application for development from a local government. As such, the landowner must research the current owners of mineral interests for the property. The Garfield County Land Use and Development Code of 2013 (“LUDC”) Section 4-101(E)(1)(b)(4) requires written notice to owners of mineral interests in the subject property in accordance with C.R.S. § 24-65.5-101, et seq, “as such owners can be identified through the records in the office of the Clerk and Recorder or Assessor, or through other means.” This form is proof of applicant’s compliance with the Colorado Revised Statutes and the LUDC. The undersigned applicant certifies that mineral owners have been researched for the subject property as required pursuant to C.R.S. § 24-65.5-101, et seq, and Section 4-101 (E)(1)(b)(4) of the Garfield County Land Use and Development Code, as amended. As a result of that research, the undersigned applicant certifies the following (Please initial on the blank line next to the statement that accurately reflects the result of research): I own the entire mineral estate relative to the subject property; or Minerals are owned by the parties listed below The names and addresses of any and all mineral owners identified are provided below (attach additional pages as necessary): Name of Mineral Owner Mailing Address of Mineral Owner I acknowledge I reviewed C.R.S. § 24-65.5-101, et seq, and I am in compliance with said statue and the LUDC. _____________________________________________ _________________________________ Applicant’s Signature Date X 2/2/2024 Gareld County, CO Developed by Date created: 1/10/2024 Last Data Uploaded: 1/10/2024 2:10:47 AM 1.4 mi Overview Legend Parcels Roads Highways Limited Access Highway Major Road Local Road Minor Road Other Road Ramp Ferry Pedestrian Way Lakes & Rivers County Boundary Line GARFIELD COUNTY COMMUNITY DEVELOPMENT DEPARTMENT Administrative Land Use Change Permit CHEVRON U.S.A. INC. SKINNER RIDGE LAYDOWN YARD ADMINISTRATIVE REVIEW LAND USE CHANGE PERMIT W ½, SECTION 36, TOWNSHIP 5 SOUTH, RANGE 98 WEST, 6TH P.M. GARFIELD COUNTY, COLORADO Prepared For: Chevron U.S.A. Inc. Contact: Doug Dennison 2115 117th Ave Greeley, CO 80634 Phone: (970) 304-5057 Prepared By: Uintah Engineering & Land Surveying, LLC 85 South 200 East Vernal, UT 84078 Phone: (435) 789-1017 Uintah Engineering & Land Surveying, LLC 85 South 200 East, Vernal, Utah 84078 Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 1 TABLE OF CONTENTS Table of Contents ....................................................................................................................................... 1 I. Introduction & Narrative .................................................................................................................... 4 Introduction ........................................................................................................................................... 4 Purpose & Need ..................................................................................................................................... 4 Location ................................................................................................................................................. 4 Section 4-118 Waiver of Standards ....................................................................................................... 4 Section 4-202 Waiver of Submission Requirements .............................................................................. 4 II. Section 4-203. Application Submittal Requirements .......................................................................... 5 Section 4-203.B. General Application Materials .................................................................................... 5 1. Application Form.................................................................................................................................... 5 2. Ownership .............................................................................................................................................. 5 3. Adjacent Property Landowners ............................................................................................................. 5 4. Fees ........................................................................................................................................................ 6 Section 4-203.C. Vicinity Map ................................................................................................................ 6 Section 4-203.D. Site Plan ...................................................................................................................... 6 Section 4-203.E. Grading Plan ................................................................................................................ 6 Section 4-203.F. Landscape Plan............................................................................................................ 6 Section 4-203.G. Impacts Analysis ......................................................................................................... 6 1. Adjacent Land Use ................................................................................................................................. 6 2. Site Features .......................................................................................................................................... 7 3. Soil Characteristics ................................................................................................................................. 7 4. Geology & Hazards ................................................................................................................................. 7 5. Groundwater & Aquifer Recharge Areas ............................................................................................... 8 6. Environmental Impacts .......................................................................................................................... 8 7. Nuisance ................................................................................................................................................ 8 8. Hours of Operations............................................................................................................................... 8 Section 4-203.J. Development Agreement ............................................................................................ 8 Section 4-203.K. Improvements Agreement ......................................................................................... 8 Section 4-203. Traffic Study ................................................................................................................... 8 Section 4-203.M. Water Supply & Distribution Plan ............................................................................. 9 Section 4-203.N. Wastewater Management & System Plan ................................................................. 9 III. Section 7 - General Approval Standards ............................................................................................. 10 7-101. Zone District Use Regulations ................................................................................................... 10 Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 2 7-102. Comprehensive Plan and Intergovernmental Agreements ...................................................... 10 7-103. Compatibility ............................................................................................................................ 10 7-104. Source of Water ........................................................................................................................ 10 7-105. Central Water Distribution and Wastewater Systems ............................................................. 10 7-106. Public Utilities ........................................................................................................................... 10 7-107. Access and Roadways ............................................................................................................... 11 7-108. Use of Land Subject to Natural Hazards ................................................................................... 11 7-109. Fire Protection .......................................................................................................................... 11 IV. General Resource Protection Standards. ........................................................................................... 12 7-201. Agricultural Lands ..................................................................................................................... 12 7-202. Wildlife Habitat Areas ............................................................................................................... 12 7-203. Protection of Waterbodies ....................................................................................................... 12 7-204. Drainage and Erosion ................................................................................................................ 12 7-205. Environmental Quality .............................................................................................................. 13 7-206. Wildfire Hazards ....................................................................................................................... 13 7-207. Natural and Geologic Hazards .................................................................................................. 13 7-208. Reclamation .............................................................................................................................. 13 V. Site Planing and Development .......................................................................................................... 14 7.301. Compatible Design .................................................................................................................... 14 7-302. Off-Street Parking and Locating Standards .............................................................................. 14 7-303. Landscaping Standards ............................................................................................................. 14 7-304. Lighting Standards .................................................................................................................... 14 7-305. Snow Storage Standards ........................................................................................................... 14 7-306. Trail and Walkway Standards ................................................................................................... 14 VI. Industrial Use ..................................................................................................................................... 15 7-1001. Industrial Use .......................................................................................................................... 15 7-1001.A. Residential Subdivisions ...................................................................................................... 15 7-1001.B. Setbacks ............................................................................................................................... 15 7-1001.C. Concealing and Screening.................................................................................................... 15 7-1001.D. Storing ................................................................................................................................. 15 7-1001.E. Industrial Wastes ................................................................................................................. 15 7-1001.F. Noise .................................................................................................................................... 15 7-1001.G. Ground Vibration ................................................................................................................ 15 7-1001.H. Hours of Operation ............................................................................................................. 15 7-1001.I. Interference, Nuisance, or Hazard ........................................................................................ 16 Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 3 VII. Appendix ............................................................................................................................................ 17 Appendix A – Vicinity Map ........................................................................................................................... 18 Appendix B – Site Plan ................................................................................................................................. 19 Appendix C – Grading Plan .......................................................................................................................... 20 Appendix D – Grading Permit ...................................................................................................................... 21 Appendix E – Landscape Plan, Seed Mix and Fertilizer Procedure .............................................................. 22 Appendix F.1 – Impact Analysis: Soils Report .............................................................................................. 23 Appendix F.2 – Impacts Analysis: Natural Resources Report ...................................................................... 24 Appendix F.3 – Impacts Analysis Aquatic Resources Inventory Report ....................................................... 25 Appendix G – Pre-Application Conference Summary .................................................................................. 26 Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 4 I. INTRODUCTION & NARRATIVE INTRODUCTION This Administrative Review Land Use Change Permit is being prepared for the Chevron U.S.A. Inc.’s (Chevron) Skinner Ridge Laydown Yard. This application is being prepared with the intent to replace the current storage yard, SKR #698-10-BV, which Chevron is currently in the process of permitting as an Oil & Gas Location through the Colorado Energy and Carbon Management Commission and Garfield County. The Skinner Ridge Laydown Yard will be utilized as a storage and staging location to assist with equipment storage and transport within Chevron’s Skinner Ridge Field. The purpose of this report is to demonstrate compliance with the applicable Garfield County Land Use and Development Codes. The parcel is currently zoned Resource Lands, and the existing land-use is grazing-land and irrigated-land. PURPOSE & NEED The proposed Skinner Ridge Laydown Yard will result in the replacement of the existing SKR 698-10-BV Laydown Yard location, permitted under Garfield County LIPA #6428, in Sections 10 & 15, T6S, R98W. The proposed site is located on Chevron’s property and within the Skinner Ridge Field. The Skinner Ridge Laydown Yard is critical to Chevon’s ability to store necessary field equipment in proximity to its operations, while reducing truck & vehicle traffic associated with the potential transportation of such equipment in and out of the field. LOCATION The Skinner Ridge Laydown Yard is located on a 4,311-acre parcel of land (Parcel ID: 2137-321-00-008) owned by Chevron U.S.A. Inc. in the W ½, Section 36, Township 5 South, Range 98 West, 6th P.M. The site will be located along a private section of CR 211 (Clear Creek Road), approximately 0.1 miles southwest of the intersection of CR 211 and an existing collector road. The parcel is currently zoned Resource Lands, and the existing land-use is grazing-land, irrigated- land, and natural resource extraction. The Skinner Ridge Laydown Yard is located 19.6 miles north of De Beque, CO and directly southwest of the Chevron Skinner Ridge Central Production Facility (CPF). The Skinner Ridge Laydown Yard area will be 4.003- acres, and the total limits of disturbance area will be 7.310-acres. SECTION 4-118 WAIVER OF STANDARDS 1. Fire Protection (7-109) 2. Off-Street Parking & Loading Standards (7-302) 3. Lighting Standards (7-304) 4. Trail & Walkway Standards (7-306) Each specific waiver request will be addressed in III. Section 4-203. Application Submittal Requirements. SECTION 4-202 WAIVER OF SUBMISSION REQUIREMENTS Chevron is requesting waivers for the following Article & Standards under Administrative Review according to Table 4-201. 1. Impacts Analysis – Geology & Hazards (4-203.G.4.) 2. Impacts Analysis – Groundwater and Aquifer Recharge Areas (4-203.G.5.) Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 5 3. Development Agreement (4-203.J) 4. Improvements Agreement (4-203.K) 5. Traffic Study (4-203.L) 6. Water Supply & Distribution Plan (4-203.M) 7. Wastewater Management/Treatment Plan (4-203.N) Each specific waiver request will be addressed in III. Section 4-203. Application Submittal Requirements. II. SECTION 4-203. APPLICATION SUBMITTAL REQUIREMENTS SECTION 4-203.B. GENERAL APPLICATION MATERIALS Table 1: Table 4-201 Application Materials Section 4-103 Administrative Review Included in Application Wavier Requested General Application Materials X Vicinity Map X Site Plan X Grading & Drainage X Landscape Plan X Impact Analysis X In Partial X In Partial Development Agreement X Improvement Agreement X Traffic Study X Water Supply/Distribution Plan X Wastewater Management & System Plan X 1. APPLICATION FORM See 1. Application – Land Use Change Permit Executed 2. OWNERSHIP Chevron U.S.A. Inc, the applicant, is the sole owner of the property. Recorded deeds are provided in the associated attachment: 8. Parcel Detail. In accordance with C.R.S. § 24-65.5-101, an executed copy of the Mineral Owner Research Memo of the subject property is included in the attachment: 8. Parcel Detail. 3. ADJACENT PROPERTY LANDOWNERS An address list of real property owners within 100’ of the parcel boundary to Parcel ID: 2137-321-00- 008, the mailing address for each of the property owners and the appropriate portion of a Garfield County Assessor’s Map showing the project site location and all public and private landowners adjacent to the subject parcel are provided below and in the associated attachment: 8. Parcel Detail. Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 6 Table 1: Adjacent Property Owners within 100’ of Parcel Boundary Property Owner Parcel Number Mailing Address Chevron U.S.A. Inc. 2137-153-00-009 PO BOX 285 Houston, TX 77001 Chevron U.S.A. Inc. 2137-153-00-009 PO BOX 285 Houston, TX 77001 Chevron U.S.A. Inc. 2137-283-00-004 PO BOX 285 Houston, TX 77001 Chevron U.S.A. Inc. 2137-722-00-003 PO BOX 285 Houston, TX 77001 Chevron U.S.A. Inc. 2139-163-00-014 PO BOX 285 Houston, TX 77001 Chevron U.S.A. Inc. 2167-081-00-002 PO BOX 285 Houston, TX 77001 Chevron U.S.A. Inc. 2167-161-00-007 PO BOX 285 Houston, TX 77001 Chevron U.S.A. Inc. 2167-212-00-008 PO BOX 285 Houston, TX 77001 Chevron U.S.A. Inc. 2167-151-00-022 PO BOX 285 Houston, TX 77001 Chevron U.S.A. Inc. 2167-014-00-020 PO BOX 285 Houston, TX 77001 Bureau of Land Management 2167-044-00-952 2300 River Frontage Road, Silt, CO 81653 Bureau of Land Management 2167-094-00-953 2300 River Frontage Road, Silt, CO 81653 Bureau of Land Management 2167-033-00-951 2300 River Frontage Road, Silt, CO 81653 Mahogany Energy Resources, LLC 2167-362-00-023 420 5TH Ave, 5th Floor, New York, NY 10018 4. FEES Fees associated with this Administrative Review Application have been paid in full in the amount of $250.00, authorized by receipt #GAPA-11-23-8990. SECTION 4-203.C. VICINITY MAP See Appendix A: Vicinity Map SECTION 4-203.D. SITE PLAN See Appendix B. Site Plan SECTION 4-203.E. GRADING PLAN See Appendix C: Grading Plan & Appendix D: Grading Permit SECTION 4-203.F. LANDSCAPE PLAN See Appendix E: Landscape Plan SECTION 4-203.G. IMPACTS ANALYSIS 1. ADJACENT LAND USE Existing use of adjacent properties within 1,500 feet of the Skinner Ridge Laydown Yard are grazing- land, irrigated-land, and natural resource extraction. Adjacent parcels are zoned resource lands. No additional impact would occur to the abutting property owners, which is also the Applicant, from grading activities and/or operations of the Skinner Ridge Laydown Yard. The proposed site is located on a 4,311-acre parcel. Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 7 2. SITE FEATURES The proposed Skinner Ridge Laydown Yard is located in the Skinner Ridge oil & gas field. The proposed site mainly consists of shrub/scrub habitat. The primary land uses surrounding the Skinner Ridge Laydown Yard include shrub/scrub land, grazing-land, irrigated- land, and natural resource extraction. There are 0 existing oil & gas wells within the Skinner Ridge Laydown Yard, and 65 existing oil & gas wells within 0.5 miles of the Skinner Ridge Laydown Yard. Based on a field survey conducted by SWCA Environmental Consultants (SWCA), the site area is dominated by big sagebrush, smooth brome, cheatgrass, western wheatgrass, mountain mahogany, crested wheatgrass, tall wheatgrass, and kochia. The Natural Resources Report, detailing plant, wildlife, and wetlands surveys, is provided as Appendix F.2. SWCA surveyed the project area for aquatic resources, including springs, seeps, wetlands and waters of the U.S. crossings that would fall under the jurisdiction of the U.S. Army Corps of Engineers in conjunction with other surveys that were conducted for this report. No waters of the U.S. features were observed by SWCA. The average annual precipitation for the area is approximately 16.65 inches. This data was collected from the Western Regional Weather Center at the Altenbern, CO weather station, which is located west of the Skinner Ridge Laydown Yard. Precipitation data was collected from 1947 to 2023. Table 3: Monthly Precipitation Average Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Average Annual Precipitation Average (Inches) 1.18 1.15 1.47 1.35 1.49 0.65 1.29 1.65 1.75 1.84 1.14 1.57 16.65 There are three (3) mapped water features present within the greater survey area for the Skinner Ridge Laydown Yard area. SWCA biologists identified one wetland (WL01) and four (4) waterbody features (WB01, WB02, WB03) within the survey area (see Appendix F.2. Natural Resources Report). None of the field verified water resources were found within the proposed development area for the Skinner Ridge Laydown Yard. The survey area is not within any Federal Emergency Management Agency 100- year flood hazard zone. Stormwater and drainage control features will be installed at the Skinner Ridge Laydown Yard to mitigate potential surface run-off. 3. SOIL CHARACTERISTICS A soils report from the Natural Resources Conservation Service (NRCS) indicates that within the area of disturbance, two (2) soil types are present. NRSC Soils Report is provided in Appendix F.1 Soils Report. 4. GEOLOGY & HAZARDS Chevron requests a waiver for the Impacts Analysis – Geology & Hazards. The Skinner Ridge Laydown Yard is not located in an area known for landslides, rockfall, collapsible soils or avalanches. The site grading will be comprised of <10,000 cubic yards of total earthwork, which will be contained to a maximum of 5.4’ of cut material and 4.5’ of fill material. Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 8 There is one existing water well in proximity to the Skinner Ridge Laydown Yard area, which will be plugged and abandoned per the standards of the Colorado State Engineer’s office and will be avoided during construction. There is also an existing water line which services that water well, which will be purged and removed from the site prior to construction. 5. GROUNDWATER & AQUIFER RECHARGE AREAS Chevron requests a waiver for the Impacts Analysis – Groundwater and Aquifer Recharge Areas. The proposed site will not have any storage or disposal of wastewater or sewage effluents. Stormwater and drainage control features will be installed at the Skinner Ridge Laydown Yard to mitigate potential surface run-off. 6. ENVIRONMENTAL IMPACTS SWCA conducted a Natural Resources Report and an Aquatic Resources Inventory Report for the Skinner Ridge Laydown Yard. See Appendix F.2: Skinner Ridge Yard Storage Natural Resources Report & Appendix F.3: Skinner Ridge Yard Storage ARIR for further reports. 7. NUISANCE Nuisance from noise, lighting, and dust is not anticipated. Smoke, vibration and vapor is not expected to occur as a result of the use of the Skinner Ridge Laydown Yard. The Skinner Ridge Laydown Yard is not located within one mile of any residential building units or designated outdoor areas. 8. HOURS OF OPERATIONS The Skinner Ridge Laydown Yard will not have personnel staffed at the site on a regular continuous basis with personnel only accessing the site occasionally to load and unload equipment. The site is not located within a one-mile radius to any residential building units or designated outdoor areas. SECTION 4-203.J. DEVELOPMENT AGREEMENT Chevron requests a waiver for the Development Plan, Section 4-203.J of the Garfield County Land Use & Development Code. The proposed site is industrial use and will solely be owned by the applicant. The Development Agreement is not appliable to the proposed site because the applicant does not seek to enter into a development agreement. SECTION 4-203.K. IMPROVEMENTS AGREEMENT Chevron requests a waiver for the Improvements Agreement, Section 4-203(K) of the Garfield County Land Use & Development Code. The proposed site will not require the installation of public utilities nor will increase demands on public facilities. The site location is remote and is currently is proposed for used for resource extraction equipment storage. The Improvements Agreement is not applicable to the proposed site because the proposed location will not require the installation of improvement to public facilities. SECTION 4-203. TRAFFIC STUDY Chevron requests a waiver for the Traffic Study, 4-203(L).1.c Study Preparation, of the Garfield County Land Use and Development Code, which states the study can be completed by a professional engineer. The development of the Skinner Ridge Laydown yard will not result in the increase of vehicle traffic in the area, as it Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 9 will be replacing an existing laydown yard in the general vicinity of the proposed site. SECTION 4-203.M. WATER SUPPLY & DISTRIBUTION PLAN Chevron requests a waiver for the Water Supply & Distribution Plan, Section 4-203(M) of the Garfield County Land Use & Development Code. The proposed site will not require the utilization or storage of water for personnel use or for the proposed use. The Skinner Ridge Laydown Yard will not have personnel staffed at the site on a regular continuous basis. During construction and interim reclamation activities, personnel will access the site daily until the site is fully functional. Once the site is functional for storage operations, the site will only be accessed during the loading and unloading of stored equipment. Due to the minimal presence of personnel onsite, drinking water will not be required onsite during operations. SECTION 4-203.N. WASTEWATER MANAGEMENT & SYSTEM PLAN Chevron requests a waiver for the Wastewater Management & System Plan, Section 4-203(N) of the Garfield County Land Use & Development Code. The proposed use, “storage yard”, is not served by an existing public collection system or treatment facility nor is an on-site wastewater treatment system proposed. During operations, personnel will not be required to be manned at the site full-time. Due to the minimal presence of personnel onsite, wastewater use will not be required. A portable toilet is located at the Skinner Ridge CPF to the north. Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 10 III. SECTION 7 - GENERAL APPROVAL STANDARDS 7-101. ZONE DISTRICT USE REGULATIONS Chevron has prepared this Administrative Review Land Use Change Permit in accordance with the following Zone District Use Regulations:  Section 4-103 Administrative Review and Section 4-101 Common Review Procedures  Table 4-201 Submission Requirements and Section 4-203 Description of Submittal Requirements  Section 4-118 and Section 4-202, as applicable  Article 7 Standards, as applicable 7-102. COMPREHENSIVE PLAN AND INTERGOVERNMENTAL AGREEMENTS Chevron is not aware of any applicable intergovernmental agency agreement. The Skinner Ridge Laydown Yard is designed to conform with the Garfield County Comprehensive Plan. The site location is within the Comprehensive Plan’s Residential Medium High land use designation. However, the adjacent and surrounding land use is Resource Production/Natural (RPN). Chevron U.S.A. Inc. submits this Land Use Change application with the intent to comply with the Garfield County Comprehensive Plan. 7-103. COMPATIBILITY Chevron has considered the existing development in the adjacent area and has designed the Skinner Ridge Laydown Yard to be of similar construction practices to the existing oil & gas locations in this area. 7-104. SOURCE OF WATER The standard “Sufficient Adequate, Legal, and Physical Source of Water”, Section 7-104 of the Garfield County Land Use Development Code, is not appliable to the propose use, storage. Water storage and use is not anticipated at the Skinner Ridge Laydown Yard location. During operations, personnel will not be required to be manned at the site full-time. Due to the minimal presence of personnel onsite, drinking water use will not be required. There is an existing water well located in the area of the Skinner Ridge Laydown Yard, which Chevron plans to abandon. 7-105. CENTRAL WATER DISTRIBUTION AND WASTEWATER SYSTEMS The standard “Adequate Central Water Distribution and Wastewater Systems”, Section 7-105 of the Garfield County Land Use Development Code, is not applicable to the proposed use. The proposed use of the site for storage, will not be served by an existing public collection system or treatment facility nor is an on-site wastewater treatment system necessary. During operations, personnel will not be required to be manned at the site full-time. Due to the minimal presence of personnel onsite, a wastewater use will not be required. A portable toilet is located at the Skinner Ridge CPF to the north. 7-106. PUBLIC UTILITIES The standard “Public Utilities”, Section 7-106 of the Garfield County Land Use Development Code, is not applicable to the proposed use. There are no public utilities within proximity to the Skinner Ridge Laydown Yard and does not require the use or installation of any public utilities. Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 11 7-107. ACCESS AND ROADWAYS Access to the Skinner Ridge Laydown Yard will be via County Road 211, Clear Creek Road, from De Beque, CO. Chevron has an established maintenance agreement with Garfield County Road & Bridge Department for winter and surface maintenance of County Road 211 & County Road 204. Access to the Skinner Ridge Laydown Yard will be restricted to only Chevron employees and their authorized contract employees and vendors. Public access via County Road 211 is restricted beginning at Chevron’s property boundary. 7-108. USE OF LAND SUBJECT TO NATURAL HAZARDS The Skinner Ridge Laydown Yard is located within proximity to Clear Creek and Tom Creek. Both creek drainages are classified as Riverine habitat. Chevron has incorporated grading and erosion control best management practices to ensure that construction material does not migrate off site to the nearby drainage system. 7-109. FIRE PROTECTION Chevron requests a waiver for the Standards Requirements – Section 7.109 Fire Protection of the Garfield County Land Use & Development Code. Chevron will ensure that the Skinner Ridge Laydown Yard is kept free of weeds and potential flammable material. Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 12 IV. GENERAL RESOURCE PROTECTION STANDARDS. 7-201. AGRICULTURAL LANDS The current land use of the parcel for the Skinner Ridge Laydown Yard site is grazing-land, irrigated-land, and natural resource extraction. However, the surrounding land development in the general area consists of oil & gas locations, infrastructure and support facilities. 7-202. WILDLIFE HABITAT AREAS The Skinner Ridge Laydown Yard is located within the following Colorado Parks and Wildlife High Priority Habitats:  Elk Severe Winter Range  Elk Winter Concentration Area  Aquatic Sportfish Management Waters In coordination with SWCA, a Natural Resources Desktop Review and Field Survey was conducted in July 2023 to review potential impacts to natural resources, included wildlife habitat, vegetative communities and nearby wetlands. Recommendations and figures related to wildlife habitat are detailed in Appendix F – Impact Analysis – Natural Resources Desktop Review and Field Survey Report. 7-203. PROTECTION OF WATERBODIES In coordination with SWCA, an Aquatic Resources Inventory Report was conducted in July 2023 with the purpose to delineate any wetlands within proximity to the Skinner Ridge Laydown Yard site. One (1) wetland and four (4) water bodies were recorded with the Skinner Ridge Laydown Yard disturbance area. Based on NWI and NHD maps, field surveys, and proximity of the proposed development to the nearest aquatic resources, disturbance from construction is not anticipated to impact potentially jurisdictional aquatic resources; therefore, the Skinner Ridge Laydown Yard construction is not expected to trigger permitting under Section 404 of the Clean Water Act (U.S. Environmental Protection Agency 2008). 7-204. DRAINAGE AND EROSION The site has been designed to adhere to the Drainage Standards stated in Section 7-204 B of the Garfield County Land Use Development Code. UELS, LLC designed the Skinner Ridge Laydown Yard with erosion control features, proper drainage and stormwater controls. The Site Engineering Design Plan is detailed in Appendix C - Grading & Drainage Plan. The site is covered by Chevron U.S.A. Inc.’s Skinner Ridge and South Canyon Stormwater Management Plan (SWMP). The cut and fill slopes of the site will be constructed and maintained at a slope of 3:1. Two (2) diversion ditches will be constructed around the site, one (1) along the west side of the Skinner Ridge Laydown Yard, and one (1) along the west side of the topsoil stockpile. Both diversion ditches will flow to the sediment basin located at the southern corner of the site. Both diversion ditches will be unlined with a minimum 12” depth, 3:1 side slopes, and 0.5% slope. The sediment basin will be constructed at the southern corner of the site at lowpoints/outfalls from the diversion ditch network. Periodic maintenance of the sediment basin may be necessary to remove accumulated silt and Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 13 debris. The sediment basin will be standard with a 4.0’ depth, bottom width 56’W x 56’L and volume of 12,918 cubic feet. 7-205. ENVIRONMENTAL QUALITY As described in Section III.C., an Aquatic Resources Inventory Report was conducted in July 2023 with the purpose to delineate any wetlands within proximity to the Skinner Ridge Laydown Yard site. Chevron has implemented the above-described Drainage and Erosion measures to mitigation any stormwater run-off that may impact the nearby wetlands. 7-206. WILDFIRE HAZARDS Chevron will ensure that the Skinner Ridge Laydown Yard is kept free of weeds and potential flammable material. 7-207. NATURAL AND GEOLOGIC HAZARDS Chevron does not anticipate to encounter any natural or geologic hazards while constructing the Skinner Ridge Laydown Yard. There is an existing buried water line located within the area of the Skinner Ridge Laydown Yard, which will be relocated outside of the proposed construction area. There is also an existing water well located within the area of the Skinner Ridge Laydown Yard. Chevron plans to abandon this water well by completing the necessary plug and abandonment procedures to ensure the well is properly sealed. 7-208. RECLAMATION Once Chevron has determined that the Skinner Ridge Laydown Yard is no longer needed, Chevron will return the disturbed area to as near as possible to the original contours and landscape of the site. All stormwater BMPs will be removed, fill slopes will be pulled back to as near as original grade and topsoil will be distributed across the site at a depth consistent with the volume that was removed during initial excavation and the location will be reseeded. Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 14 V. SITE PLANING AND DEVELOPMENT 7.301. COMPATIBLE DESIGN Chevron has considered the existing development in the adjacent area and has designed the Skinner Ridge Laydown Yard to be of similar construction practices to the existing oil & gas locations in this area. 7-302. OFF-STREET PARKING AND LOCATING STANDARDS Chevron requests a waiver for the Standards Requirements – Section 7.302 Off-Street Parking and Locating Standards of the Garfield County Land Use & Development Code. The proposed site location does not have a designated parking area due to the minimal presence of employees onsite. The site is located on private property and prohibits public access. Access to the site is restricted to Chevron employees and their authorized contract employees and vendors. Public access via County Road 211 is restricted beginning at Chevron’s property boundary. 7-303. LANDSCAPING STANDARDS All cut and fill slopes, topsoil stockpiles and areas not intended for storage use area will be seeded and mulched at the earliest available planting season. The Sediment Basin will be maintained throughout the life of the site and will be periodically inspected for structural integrity. Chevron will comply with the established Skinner Ridge and South Canyon SWMP Seed Mix and Fertilization Procedures, as outlined in Appendix E – Landscape Plan, Seed Mix and Fertilizer Procedure. 7-304. LIGHTING STANDARDS Chevron requests a waiver for the Standards Requirements – 7.304 Lighting Standards of the Garfield County Land Use & Development Code. Permanent lighting will not be utilized for the Skinner Ridge Laydown Yard. If temporary lighting is necessary during equipment loading or unloading activities, portable light generators will be utilized during those operations. 7-305. SNOW STORAGE STANDARDS Snow removal within the Skinner Ridge Laydown Yard will be completed as necessary by Chevron employees or authorized vendors in order to safely access the area. Snow may be stored around the exterior boundaries of the site away from high traffic or travel areas. Snow stockpiles will be placed in a manner that does not prohibit visibility and line of site at the site entrance and onto County Road 211. 7-306. TRAIL AND WALKWAY STANDARDS Chevron requests a waiver for the Standards Requirements – Section 7.306 Trail & Walkway Standards of the Garfield County Land Use & Development Code. Public access is prohibited as the site is located on private property. Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 15 VI. INDUSTRIAL USE 7-1001. INDUSTRIAL USE The Skinner Ridge Laydown Yard shall meet all applicable industrial standards. 7-1001.A. RESIDENTIAL SUBDIVISIONS The proposed industrial use, “storage yard”, will be located on a parcel zoned Resource Lands, and not located on a platted subdivision. 7-1001.B. SETBACKS Existing use of the adjacent property is natural resource extraction and agriculture. Adjacent parcels are zoned Resource Lands. A residential property line is not adjacent to the site boundary or the parcel line. 7-1001.C. CONCEALING AND SCREENING The proposed site is located on 4,311-acre parcel in a rural, remote area of Garfield County. There are no homes within close proximity to the site, and the site will not be visible to the public. The land surrounding the site is currently used for oil & natural gas production and agriculture activities. Site photos are located in the Appendix F – Impact Analysis. The Site Plan and Site Engineering Design Plan which depict the contours of the sites are shown in Appendix B & D, respectively. 7-1001.D. STORING Materials will be securely stored to prevent materials leaving the site by any natural cause. All products will be stored securely and in compliance with national, State, and local codes. Petroleum and hazardous products will not be stored or transported at this site. Storage will not occur within 100-feet of the adjacent property line. 7-1001.E. INDUSTRIAL WASTES Flammable, explosive and hazardous materials will not be stored at the site. Waste will be disposed of at a permitted facility. Chevron will dispose of waste in a manner consistent with Federal and State requirements. 7-1001.F. NOISE Nuisance from noise is not anticipated at the site. Permanent equipment, engines, generators and structures will not be installed at the site. 7-1001.G. GROUND VIBRATION Ground vibration will not be perceptible without instruments at any point on the property boundary line. 7-1001.H. HOURS OF OPERATION Chevron will not have personnel staffed at the site on a regular continuous basis. Personnel will only be present during the initial construction of the site and subsequent loading and unloading activities. The site is not located in close proximity to any residences and is located in and adjacent to Resource Lands zone district. Adjacent land uses include natural resource activities. Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 16 7-1001.I. INTERFERENCE, NUISANCE, OR HAZARD The subject use, “storage”, will not create nuisances or hazards to the public or adjacent properties. Heat, glare, radiation or fumes will not be generated by operations at the site. The proposed site has been designed to minimize any impacts to the adjacent parcels. The site is located on 4,311-acre parcel in the Resource Land zone district, surrounded by natural resource and agricultural activities. Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 17 VII. APPENDIX The Appendix Sections included in this application are being submitted as separate pdf files for ease of reference. Please reference the document file name in reference to each Appendix Section. Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 18 APPENDIX A – VICINITY MAP Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 19 APPENDIX B – SITE PLAN Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 20 APPENDIX C – GRADING PLAN Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 21 APPENDIX D – GRADING PERMIT Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 22 APPENDIX E – LANDSCAPE PLAN, SEED MIX AND FERTILIZER PROCEDURE Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 23 APPENDIX F.1 – IMPACT ANALYSIS: SOILS REPORT Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 24 APPENDIX F.2 – IMPACTS ANALYSIS: NATURAL RESOURCES REPORT Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 25 APPENDIX F.3 – IMPACTS ANALYSIS AQUATIC RESOURCES INVENTORY REPORT Skinner Ridge Laydown Yard Administrative Review Land Use Change Permit 2/8/2024 26 APPENDIX G – PRE-APPLICATION CONFERENCE SUMMARY ENGINEERING & LAND SURVEYING UELS, LLC Corporate Office * 85 South 200 East Vernal, UT 84078 * (435) 789-1017 VICINITY MAP LEGEND: SCALE 1 : 60,000SURVEYED BY DRAWN BY PROPOSED LOCATION: SKINNER RIDGE LAYDOWN YARD R 99 W R 98 W T6S T5S R 98 W R 97 W SKINNER RIDGE LAYDOWN YARD SECTION 36, T5S, R98W, 6th P.M.GARFIELD COUNTY, COLORADO CHEVRON U.S.A. INC. D.S.08-04-23 B.D.H.09-15-23 BLM CHEVRON U.S.A. INC. RANCH, EV LLLP BRANDED ROCK CANYON LLC MAHOGANY ENERGY RESOURCES LLC 3 MILE BUFFER X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O H P O H P O H P O H P O H P O H P OHP OHP X X X X X X X O H P O H P O H P O H P O H P O H P O H P OHP OHP OHP OHP OHP OHP OHP O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P OH P OH P OH P OH P OH P OH P OH P O H P O H P OHP O H P O H P O H P O H P X DRAWN BY: B.D.H. SCALE: DATE DRAWN: 09-15-23 PROJ.NO: CHE02-23-0018 UELS FILE NO.: C-7751 CIVIL ENGINEERING ANDLAND SURVEYING SERVICES 85 South 200 East, Vernal, UT 84078O: 435.789.1017www.uintahgroup.com - SINCE 1964 - CH E V R O N U . S . A . I N C . SK I N N E R R I D G E L A Y D O W N Y A R D GR A D I N G P L A N SE C . 3 6 , T 5 S , R 9 8 W , 6 t h P . M . GA R F I E L D C O U N T Y , C O L O R A D O DA T E B Y RE V I S I O N S FILE: E- F I L E : E: \ B A C K E D \ 2 0 2 3 \ 9 _ S E P \ C H E V R O N \ C - 7 7 5 1 S K I N N E R R I D G E L A Y D O W N Y A R D \ D W G \ C - 7 7 5 1 _ S i t e P l a n . d w g B H E N L I N E 1 0 / 1 8 / 2 0 2 3 1 : 3 0 P M U S E R D E F I N E D I M P E R I A L ( 2 4 . 0 0 X 3 6 . 0 0 I N C H E S ) RESPONSIBLE ENGINEER: RE V SHEET SITE PLAN C101 1" = 100' LEGEND: PROPOSED FENCE EXISTING EDGE OF ROAD EXISTING PAD EDGE PROPOSED PAD EDGE OHP EXISTING OVERHEAD POWER PROPOSED EDGE OF ROAD EDGE OF RIGHT OF WAY EXISTING MINOR CONTOUR (1') EXISTING MAJOR CONTOUR (5') 0000 0000 PROPOSED MINOR CONTOUR (1') PROPOSED MAJOR CONTOUR (5') 0000 0000 LIMIT OF DISTURBANCE (LOD) LAYDOWN YARD TOTAL PAD AREA: ±4.003 AC. TOPSOIL STOCKPILE MAX HEIGHT: 10' SIDE SLOPE: 3:1 7,600 CY Clear Creek Surveyed Top of Bank Existing Water Well Tom Creek Surveyed Top of Bank Existing Treeline Existing Fence Existing Pad Existing Water Trough Existing Water Line Existing Pipeline (To Be Re-Routed Around LOD)Existing 2-Track Proposed Access Road 24' Wide Proposed Fence Se c t i o n L i n e Se c t i o n 3 5 , T 5 S , R 9 8 W Se c t i o n 3 6 , T 5 S , R 9 8 W West 1/4 Corner of Sec. 36, T5S, R98W, 6th P.M. Alum. Cap S C A L E 0'50'100' 1" = 100' RECORED LEGAL DESCRIPTIONS: PARCEL: #213732100008 CHEVRON USA INC LOTS 4(39.60),5(39.60),6(39.60),7(39.60) Section: 36, Township 5 South, Range 98 West, 6th P.M. ZONING DISTRICT PROJECT AREA IS LOCATED IN RURAL (R) ZONING DISTRICT. 1/ 1 6 S e c t i o n L i n e 1/4 Section Line LIMITS OF DISTURBANCE AREA DESCRIPTION: THIS PROJECT: DISTURBANCE AREA LOCATED IN THE W 1 2 OF SECTION 36, TOWNSHIP 5 SOUTH, RANGE 98 WEST OF THE 6TH P.M., COUNTY OF GARFIELD, STATE OF COLORADO AND BEING MORE PARTICULARLY DESCRIBED AS FOLLOWS: COMMENCING AT THE WEST 1 4 CORNER OF SAID SECTION 36 FROM WHICH THE NORTHWESTCORNER OF SAID SECTION 36 BEARS N00°05'27"W 2643.62'; THENCE S39°15'24"E 524.39' TO THE POINT OF BEGINNING. THENCE N19°22'17"E 505.61'; THENCE N13°22'00"E 14.34'; THENCE N35°50'56"W 30.26'; THENCE N20°24'49"W 191.95'; THENCE N10°54'19"W 84.45'; THENCE N68°31'24"E 311.24'; THENCE S88°27'24"E 38.67'; THENCE N82°25'52"E 95.23'; THENCE S24°12'25"E 360.41'; THENCE S16°13'11"W 534.93'; THENCE S68°31'24"W 167.66' TO THE POINT OF BEGINNING. CONTAINS 7.310 ACRES MORE OR LESS. Northwest Corner of Sec. 36, T5S, R98W, 6th P.M. Brass Cap SB DD DD SEDIMENT BASINSB DIVERSION DITCHDD FILL AREA DIMENSION CORNER (NOT SET) Existing Pipeline (TYP.) Existing Pit EXISTING FENCEX EXISTING PIPELINE PROPOSED PIPELINE LIMITS OF DISTURBANCE BOUNDARY TOTAL AREA: ±7.310 AC. Existing Culvert Existing Culvert Proposed Re-Routed Pipeline DRAWN BY: B.D.H. SCALE: DATE DRAWN: 09-15-23 PROJ.NO: CHE02-23-0018 UELS FILE NO.: C-7751 CIVIL ENGINEERING ANDLAND SURVEYING SERVICES 85 South 200 East, Vernal, UT 84078O: 435.789.1017www.uintahgroup.com - SINCE 1964 - CH E V R O N U . S . A . I N C . SK I N N E R R I D G E L A Y D O W N Y A R D GR A D I N G P L A N SE C . 3 6 , T 5 S , R 9 8 W , 6 t h P . M . GA R F I E L D C O U N T Y , C O L O R A D O DA T E B Y RE V I S I O N S FILE: E- F I L E : E: \ B A C K E D \ 2 0 2 3 \ 9 _ S E P \ C H E V R O N \ C - 7 7 5 1 S K I N N E R R I D G E L A Y D O W N Y A R D \ D W G \ C - 7 7 5 1 _ G R A D I N G P L A N . d w g B H E N L I N E 1 0 / 1 8 / 2 0 2 3 1 : 2 9 P M U S E R D E F I N E D I M P E R I A L ( 2 4 . 0 0 X 3 6 . 0 0 I N C H E S ) RESPONSIBLE ENGINEER: RE V SHEET COVER SHEET C001 NOT TO SCALE VICINITY MAP SCALE: 1" = 2,000' TAKEN FROM 7.5 MIN TOPOGRAPHIC MAP PRODUCED BY THE UNITED STATES GEOLOGICAL SURVEY VICINITY MAP LEGEND PROPERTY BOUNDARY, FROM COUNTY PARCEL MAP ACCESS ROAD PROPOSED SITE 1. The contractor shall be responsible for contacting the Utility Notification Center of Colorado (Call before you dig), 811. Call two business days prior (not including the day of the call) to digging, grading or excavating for the marking of underground member utilities. 2. Prior to commencement of any construction, the contractor shall contact all utilities to coordinate schedules. 3. The contractor shall be responsible for all traffic control during construction. 4. The contractor shall restore any disturbed areas, outside of the shown disturbance area to equal or better condition than existed before construction. Drainage ditches or watercourses that are disturbed by construction shall be restored to the grades and cross-sections that existed before construction, unless otherwise shown on the construction documents. 5. The contractor shall carefully preserve benchmarks, property corners, reference points, stakes and other survey reference monuments or markers. In case of willful or careless destruction, the contractor shall be responsible for restorations. Resetting of markers shall be performed under the direction of a Colorado licensed Professional Land Surveyor. 6. The contractor shall immediately remove any construction debris and mud tracked onto existing roadways. The contractor shall repair any excavation or pavement failures caused by the construction. 7. All damaged existing curb, gutter, and sidewalk shall be repaired prior to acceptance of completed improvements. 8. The type, size, location and number of all known underground utilities are approximate when shown on these construction drawings. It shall be the responsibility of the contractor to verify the existence and location of all underground utilities along the route of the work prior to commencing any new construction. The contractor shall be responsible of any unknown underground utilities. 9. The Owner/Developer shall be responsible for providing all required lot staking and construction staking. The Contractor shall coordinate through the Owner's designated representative to assure that the surveyor is given adequate notice and instruction in order to complete the survey requirements for the various phases of work. The Contractor shall be responsible for the cost of re-surveying required due to the Contractor's, or subcontractor's, activities. The Contractor shall be responsible for the costs associated with rescheduling the surveyor to accommodate the Contractor's requests for unscheduled staking. 10. If required, the Contractor shall provide and implement a “Traffic Control Plan” related to all construction activities for this project. 11. The Contractor shall perform all work according to all Town, County, State and Federal safety and health regulations. In particular, the trenching and open excavation operations shall comply with all current O.S.H.A. regulatory requirements. 12. All construction activities must comply with the State of Colorado permitting process for “Stormwater Discharges Associated with Construction Activity.” For information contact the Colorado Department of Health, Water Quality Control Division, WQCD-PE-B2, 4300 Cherry Creek Drive South, Denver, Colorado, 80246. Attention: Permits and Enforcement Section. Phone (303) 692-3500. 13. When discharging groundwater, all dewatering methods shall be in conformance with all laws and regulations of the State - including a Colorado Discharge Permit System for Construction Dewatering Wastewater Discharge. The contractor shall take all necessary and proper precautions to protect adjacent properties from any and all damage that may occur from stormwater runoff and /or deposition of debris resulting from any and all work. 14. The contractor shall have a registered land surveyor tie out and reset any property corners or section corners planned to be disturbed by construction of this project, and shall have a registered land surveyor reestablish any property corners or section corners inadvertently disturbed during construction of this project. 15. The contractor is responsible for placing, maintaining, and removing all stormwater BMP for the entire length of the project. CONTACT INFORMATION OPERATOR CHEVRON U.S.A. INC. ADDRESS City, State Zip O: PHONE NUMBER CIVIL ENGINEER / SURVEYOR Uintah Engineering & Land Surveying, LLC Headquarters 85 South 200 East Vernal, Utah 84078 (435) 789-1017 Colorado Branch 3313 35th Ave. #B Evans, CO 80620 (970) 506-1544 CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU DIG, GRADE, OR EXCAVATE FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES. CALL UTILITY NOTIFICATION CENTER OF COLORADO Know what's below.before you dig.Call R CHEVRON U.S.A. INC. SKINNER RIDGE LAYDOWN YARD GRADING PLAN LOCATED IN THE W 1/2 OF SECTION 36, TOWNSHIP 5S, RANGE 98W OF THE 6th P.M. COUNTY OF GARFIELD, STATE OF COLORADO SHEET INDEX INDEX NO. SHEET NO.DESCRIPTION COVER AND GENERAL NOTES 1 C001 COVER SHEET 3 C102 EROSION CONTROL PLAN5C104 GRADING PLAN 4 C103 PAD CROSS SECTIONS STANDARD GENERAL NOTES FOR GRADING PLAN T6S T5S R 98 W R 97 W C R 2 1 1 ( C L E A R C R E E K R O A D ) LIMITS OF DISTURBANCE (LOD) BOUNDARY CHEVRON U.S.A. INC. 2 C101 5 C501 LANDSCAPE PLAN5L101 SITE PLAN CONSTRUCTION DETAILS X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P OH P OH P OH P OH P OH P OH P OH P OH P OH P OH P OH P X X SEDIMENT DIVERSION DITCH-1: L - 800 FT DEPTH - 12" MIN. 3:1 SIDE SLOPES, SLOPE: MIN. 0.5% UNLINED DRAWN BY: B.D.H. SCALE: DATE DRAWN: 09-15-23 PROJ.NO: CHE02-23-0018 UELS FILE NO.: C-7751 CIVIL ENGINEERING ANDLAND SURVEYING SERVICES 85 South 200 East, Vernal, UT 84078O: 435.789.1017www.uintahgroup.com - SINCE 1964 - CH E V R O N U . S . A . I N C . SK I N N E R R I D G E L A Y D O W N Y A R D GR A D I N G P L A N SE C . 3 6 , T 5 S , R 9 8 W , 6 t h P . M . GA R F I E L D C O U N T Y , C O L O R A D O DA T E B Y RE V I S I O N S FILE: E- F I L E : E: \ B A C K E D \ 2 0 2 3 \ 9 _ S E P \ C H E V R O N \ C - 7 7 5 1 S K I N N E R R I D G E L A Y D O W N Y A R D \ D W G \ C - 7 7 5 1 _ G R A D I N G P L A N . d w g B H E N L I N E 1 0 / 1 8 / 2 0 2 3 1 : 3 2 P M U S E R D E F I N E D I M P E R I A L ( 2 4 . 0 0 X 3 6 . 0 0 I N C H E S ) RESPONSIBLE ENGINEER: RE V SHEET GRADING PLAN C102 1" = 50' CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU DIG, GRADE, OR EXCAVATE FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES. CALL UTILITY NOTIFICATION CENTER OF COLORADO Know what's below.before you dig.Call R S C A L E 0'25'50' 1" = 50' NOTES: 1. THE SIZE, TYPE AND LOCATION OF ALL KNOWN UNDERGROUND UTILITIES ARE APPROXIMATE WHEN SHOWN ON THESE DRAWINGS. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFY THE EXISTENCE OF ALL UNDERGROUND UTILITIES IN THE AREA OF THE WORK. BEFORE COMMENCING NEW CONSTRUCTION, THE CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING ALL UNDERGROUND UTILITIES. 2. CONTRACTOR SHALL BE RESPONSIBLE FOR COORDINATING DEMOLITION, REMOVAL, REPLACEMENT, AND DISPOSAL OF ALL FACILITIES AND MATERIAL. 3. ALL SYMBOLS ARE ONLY GRAPHICALLY REPRESENTED AND ARE NOT TO SCALE. 4. CONTACT THE PROJECT SURVEYOR FOR ANY INQUIRIES RELATED TO THE EXISTING SITE SURVEY. 5. PROPOSED GRADING PLAN IS BASED ON EXISTING SITE CONTOURS. 6. THE PROPERTY OWNER SHALL CONTROL NOXIOUS WEEDS ON THE SITE POST CONSTURCTION. 7. THE HISTORICAL FLOW PATTERNS AND RUNOFF AMOUNTS ON THE SITE WILL BE MAINTAINED. 8. REFER TO DETAIL SHEETS FOR EROSION CONTROL BMP DETAILS. (6") TOPSOIL STRIPPING REMAINING LOCATION EXCESS MATERIAL EARTHWORK BALANCE APPROXIMATE EARTHWORK QUANTITIES TOTAL CUT FILL TOPSOIL **ESTIMATE ONLY** 3,520 Cu. Yds. 6,140 Cu. Yds. 3,520 Cu. Yds. 6,140 Cu. Yds. 9,660 Cu. Yds. 0 Cu. Yds. 3,520 Cu. Yds. GRADING DETAILS: 8 Round Corner (35'R) TOPSOIL STOCKPILE MAX HEIGHT: 10' SIDE SLOPE: 3:1 7,600 CY C-5.1'FG-5991.5'EG-5996.6' 3:1 DD SEDIMENT DIVERSION DITCH-1: L - 800 FT DEPTH - 12" MIN. 3:1 SIDE SLOPES, SLOPE: MIN. 0.5% UNLINED 3:1 3:1 3:1 3:1 3:1 3 : 1 3:1 3 : 1 3:1 3 : 1 3 : 1 3:1 9 C-1.2'FG-5990.5'EG-5991.7' 10 F-1.7'FG-5989.7'EG-5988.0' 11 1 F-1.8'FG-5988.4'EG-5986.6' 2 F-0.1'FG-5988.4'EG-5988.3' 3C-1.9'FG-5989.7'EG-5991.6' 4 C-2.5'FG-5990.1'EG-5992.6' 5 C-2.3'FG-5990.1'EG-5992.4' C-4.5'FG-5991.2'EG-5995.7' C-5.4'FG-5991.5'EG-5996.9' 6 7 C-4.2'FG-5991.5'EG-5995.7' F-4.0'FG-5988.8'EG-5984.8' F-4.5'FG-5988.4'EG-5983.9' DD Round Corner (35'R) Clear Creek Surveyed Top of Bank Existing Water Well (To be Abandoned) Tom Creek Surveyed Top of Bank Existing Treeline Existing Fence Existing Pad Existing Water Trough Existing Water Line Existing Buried Water Line (To Be Re-Routed Around LOD) PAD DIMENSION POINT C-0.8'EG-5989.7'FG-5990.5' Existing 2-Track (To be Removed) Proposed Access Road 24' Wide Proposed Fence TOTAL LIMITS OF DISTURBANCE WORKING PAD SURFACE ±7.310 ±4.003 ACRES APPROXIMATE PROJECT AREAS NOTES: ·Fill quantity includes 10% for compaction. ·Calculations based on 6" of topsoil stripping. ·Cut/Fill slopes 3:1 (Typ. except where noted). Se c t i o n L i n e Se c t i o n 3 5 Se c t i o n 3 6 A A B B C C D D LEGEND: PROPOSED FENCE EXISTING EDGE OF ROAD EXISTING PAD EDGE PROPOSED PAD EDGE OHP EXISTING OVERHEAD POWER PROPOSED EDGE OF ROAD EDGE OF RIGHT OF WAY EXISTING MINOR CONTOUR (1') EXISTING MAJOR CONTOUR (5') 0000 0000 PROPOSED MINOR CONTOUR (1') PROPOSED MAJOR CONTOUR (5') 0000 0000 LIMIT OF DISTURBANCE (LOD) EXISTING FENCEX EXISTING PIPELINE PROPOSED PIPELINE Proposed Buried Water Line (To be Field Layed) Existing Culvert Existing Culvert Existing Culvert Install Cattle Guard LAYDOWN YARD TOTAL PAD AREA: ±4.003 AC. LIMITS OF DISTURBANCE BOUNDARY TOTAL AREA: ±7.310 AC. DRAWN BY: B.D.H. SCALE: DATE DRAWN: 09-15-23 PROJ.NO: CHE02-23-0018 UELS FILE NO.: C-7751 CIVIL ENGINEERING ANDLAND SURVEYING SERVICES 85 South 200 East, Vernal, UT 84078O: 435.789.1017www.uintahgroup.com - SINCE 1964 - CH E V R O N U . S . A . I N C . SK I N N E R R I D G E L A Y D O W N Y A R D GR A D I N G P L A N SE C . 3 6 , T 5 S , R 9 8 W , 6 t h P . M . GA R F I E L D C O U N T Y , C O L O R A D O DA T E B Y RE V I S I O N S FILE: E- F I L E : E: \ B A C K E D \ 2 0 2 3 \ 9 _ S E P \ C H E V R O N \ C - 7 7 5 1 S K I N N E R R I D G E L A Y D O W N Y A R D \ D W G \ C - 7 7 5 1 _ G R A D I N G P L A N . d w g B H E N L I N E 1 0 / 1 8 / 2 0 2 3 1 : 3 2 P M U S E R D E F I N E D I M P E R I A L ( 2 4 . 0 0 X 3 6 . 0 0 I N C H E S ) RESPONSIBLE ENGINEER: RE V SHEET PAD CROSS SECTIONS C103 NOT TO SCALE A - A B - B C - C D - D X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P OH P OH P OH P OH P OH P OH P OH P OH P OH P OH P OH P X X SEDIMENT DIVERSION DITCH-1: L - 800 FT DEPTH - 12" MIN. 3:1 SIDE SLOPES, SLOPE: MIN. 0.5% UNLINED DRAWN BY: B.D.H. SCALE: DATE DRAWN: 09-15-23 PROJ.NO: CHE02-23-0018 UELS FILE NO.: C-7751 CIVIL ENGINEERING ANDLAND SURVEYING SERVICES 85 South 200 East, Vernal, UT 84078O: 435.789.1017www.uintahgroup.com - SINCE 1964 - CH E V R O N U . S . A . I N C . SK I N N E R R I D G E L A Y D O W N Y A R D GR A D I N G P L A N SE C . 3 6 , T 5 S , R 9 8 W , 6 t h P . M . GA R F I E L D C O U N T Y , C O L O R A D O DA T E B Y RE V I S I O N S FILE: E- F I L E : E: \ B A C K E D \ 2 0 2 3 \ 9 _ S E P \ C H E V R O N \ C - 7 7 5 1 S K I N N E R R I D G E L A Y D O W N Y A R D \ D W G \ C - 7 7 5 1 _ G R A D I N G P L A N . d w g B H E N L I N E 1 0 / 1 8 / 2 0 2 3 1 : 3 3 P M U S E R D E F I N E D I M P E R I A L ( 2 4 . 0 0 X 3 6 . 0 0 I N C H E S ) RESPONSIBLE ENGINEER: RE V SHEET C104 1" = 50' CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU DIG, GRADE, OR EXCAVATE FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES. CALL UTILITY NOTIFICATION CENTER OF COLORADO Know what's below.before you dig.Call R S C A L E 0'25'50' 1" = 50' NOTES: 1. THE SIZE, TYPE AND LOCATION OF ALL KNOWN UNDERGROUND UTILITIES ARE APPROXIMATE WHEN SHOWN ON THESE DRAWINGS. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFY THE EXISTENCE OF ALL UNDERGROUND UTILITIES IN THE AREA OF THE WORK. BEFORE COMMENCING NEW CONSTRUCTION, THE CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING ALL UNDERGROUND UTILITIES. 2. CONTRACTOR SHALL BE RESPONSIBLE FOR COORDINATING DEMOLITION, REMOVAL, REPLACEMENT, AND DISPOSAL OF ALL FACILITIES AND MATERIAL. 3. ALL SYMBOLS ARE ONLY GRAPHICALLY REPRESENTED AND ARE NOT TO SCALE. 4. CONTACT THE PROJECT SURVEYOR FOR ANY INQUIRIES RELATED TO THE EXISTING SITE SURVEY. 5. PROPOSED GRADING PLAN IS BASED ON EXISTING SITE CONTOURS. 6. THE PROPERTY OWNER SHALL CONTROL NOXIOUS WEEDS ON THE SITE POST CONSTURCTION. 7. THE HISTORICAL FLOW PATTERNS AND RUNOFF AMOUNTS ON THE SITE WILL BE MAINTAINED. 8. REFER TO DETAIL SHEETS FOR EROSION CONTROL BMP DETAILS. (6") TOPSOIL STRIPPING REMAINING LOCATION EXCESS MATERIAL EARTHWORK BALANCE APPROXIMATE EARTHWORK QUANTITIES TOTAL CUT FILL TOPSOIL **ESTIMATE ONLY** 3,520 Cu. Yds. 6,140 Cu. Yds. 3,520 Cu. Yds. 6,140 Cu. Yds. 9,660 Cu. Yds. 0 Cu. Yds. 3,520 Cu. Yds. GRADING DETAILS: 8 Round Corner (35'R) TOPSOIL STOCKPILE MAX HEIGHT: 10' SIDE SLOPE: 3:1 7,600 CY C-5.1'FG-5991.5'EG-5996.6' 3:1 DD SEDIMENT DIVERSION DITCH-1: L - 800 FT DEPTH - 12" MIN. 3:1 SIDE SLOPES, SLOPE: MIN. 0.5% UNLINED 3:1 3:1 3:1 3:1 3:1 3 : 1 3:1 3 : 1 3:1 3 : 1 3 : 1 3:1 9 C-1.2'FG-5990.5'EG-5991.7' 10 F-1.7'FG-5989.7'EG-5988.0' 11 1 F-1.8'FG-5988.4'EG-5986.6' 2 F-0.1'FG-5988.4'EG-5988.3' 3C-1.9'FG-5989.7'EG-5991.6' 4 C-2.5'FG-5990.1'EG-5992.6' 5 C-2.3'FG-5990.1'EG-5992.4' C-4.5'FG-5991.2'EG-5995.7' C-5.4'FG-5991.5'EG-5996.9' 6 7 C-4.2'FG-5991.5'EG-5995.7' F-4.0'FG-5988.8'EG-5984.8' F-4.5'FG-5988.4'EG-5983.9' DD A A B B C C D LEGEND: PROPOSED FENCE EXISTING EDGE OF ROAD EXISTING PAD EDGE PROPOSED PAD EDGE OHP EXISTING OVERHEAD POWER PROPOSED EDGE OF ROAD EDGE OF RIGHT OF WAY EXISTING MINOR CONTOUR (1') EXISTING MAJOR CONTOUR (5') 0000 0000 PROPOSED MINOR CONTOUR (1') PROPOSED MAJOR CONTOUR (5') 0000 0000 LIMIT OF DISTURBANCE (LOD) EXISTING FENCEX EXISTING PIPELINE PROPOSED PIPELINE Proposed Buried Water Line (To be Field Layed) Existing Culvert Existing Culvert Existing Culvert Install Cattle Guard Round Corner (35'R) Clear Creek Surveyed Top of Bank Existing Water Well (To be Abandoned) Tom Creek Surveyed Top of Bank Existing Treeline Existing Fence Existing Pad Existing Water Trough Existing Water Line Existing Buried Water Line (To Be Re-Routed Around LOD) PAD DIMENSION POINT C-0.8'EG-5989.7'FG-5990.5' Existing 2-Track (To be Removed) Proposed Access Road 24' Wide Proposed Fence TOTAL LIMITS OF DISTURBANCE WORKING PAD SURFACE ±7.310 ±4.003 ACRES APPROXIMATE PROJECT AREAS NOTES: ·Fill quantity includes 10% for compaction. ·Calculations based on 6" of topsoil stripping. ·Cut/Fill slopes 3:1 (Typ. except where noted). Se c t i o n L i n e Se c t i o n 3 5 Se c t i o n 3 6 LAYDOWN YARD TOTAL PAD AREA: ±4.003 AC. LIMITS OF DISTURBANCE BOUNDARY TOTAL AREA: ±7.310 AC. DIVERSION DITCHDD EROSION CONTROL BLANKETECB REINFORCED ROCK BERMRRB RRB FOR CULVERT PROTECTIONRRC SEDIMENT BASINSB SEDIMENT CONTROL LOGSCL SEDIMENT TRAPST SEEDING AND MULCHINGSM BMP LEGEND: SILT FENCESF STABILIZED STAGING AREASSA VTC LIMITS OF CONSTRUCTION, LOCLOD X VEHICLE TRACKOUT CONTROL (FODS MAT OR EQUIVALENT) FILL AREA EROSION CONTROL PLAN SB SM VTC TOTAL SEED AND MULCH AREA ±3.307 D DRAWN BY: B.D.H. SCALE: DATE DRAWN: 09-15-23 PROJ.NO: CHE02-23-0018 UELS FILE NO.: C-7751 CIVIL ENGINEERING ANDLAND SURVEYING SERVICES 85 South 200 East, Vernal, UT 84078O: 435.789.1017www.uintahgroup.com - SINCE 1964 - CH E V R O N U . S . A . I N C . SK I N N E R R I D G E L A Y D O W N Y A R D GR A D I N G P L A N SE C . 3 6 , T 5 S , R 9 8 W , 6 t h P . M . GA R F I E L D C O U N T Y , C O L O R A D O DA T E B Y RE V I S I O N S FILE: E- F I L E : E: \ B A C K E D \ 2 0 2 3 \ 9 _ S E P \ C H E V R O N \ C - 7 7 5 1 S K I N N E R R I D G E L A Y D O W N Y A R D \ D W G \ C - 7 7 5 1 _ G R A D I N G P L A N . d w g B H E N L I N E 1 0 / 1 8 / 2 0 2 3 1 : 3 3 P M U S E R D E F I N E D I M P E R I A L ( 2 4 . 0 0 X 3 6 . 0 0 I N C H E S ) RESPONSIBLE ENGINEER: RE V SHEET CL 12'-0"12'-0" 24-0" ROADWAY ROAD FILL 3:1 CUT 3:1 DITCH 4" LAYER CDOT CLASS 6 AGGREGATE BASE 3:1 SCARIFY, MOISTURE CONDITION, AND RE-COMPACT SUBGRADE TO A DEPTH OF 12 INCHES COMPACTION SPECIFICATIONS: 1. COMPACT SUBGRADE AND SURFACING TO 95% OF MAXIMUM DRY DENSITY, ACCORDING TO MATERIAL PROCTOR. 2. MOISTURE CONDITION TO WITHIN ±2% OF THE OPTIMUM MOISTURE CONTENT, AS DETERMINED BY THE MATERIAL PROCTOR. 3:1 3' MIN.3' MIN. TYPICAL OFF-SITE DIVERSION DITCH 12" MIN. SWALE DEPTH (MIN.) 3:1 CL 2%2% 1'-6"1'-6" 3 NO SCALE TYPICAL ROADWAY CROSS-SECTION 4 NO SCALE TYPICAL DIVERSION DITCH SCALE: SEEDING AND MULCHING DETAILS NO SCALE5 MATCH EXISTING GRADE SEEDING AND MULCHING INSTALLATION NOTES: 1. SEE PLAN VIEW FOR: - AREA OF SEEDING AND MULCHING - TYPE OF SEED MIX (PERMANENT, TEMPORARY OR LOW-GROWTH). 2. ALL BRANDS FURNISHED SHALL BE FREE FROM SUCH NOXIOUS WEEDS AS RUSSIAN OR CANADIAN THISTLE, COURSE FESCUE, EUROPEAN BINDWEED, JOHNSON GRASS, KNAP WEED AND LEAFY SPURGE. 3. THE SEEDER SHALL FURNISH TO THE CONTRACTOR A SIGNED STATEMENT CERTIFYING THAT THE SEED FURNISHED IS FROM A LOT THAT HAS BEEN TESTED BY A RECOGNIZED LABORATORY. SEED WHICH AS BECOME WET, MOLDY OR OTHERWISE DAMAGED IN TRANSIT OR IN STORAGE WILL NOT BE ACCEPTABLE. 4. DRILL SEED MIX SHALL CONFORM TO THE TABLE ON THE RIGHT UNLESS OTHEWISE APPROVED BY THE COUNTY. 5. IF THE SEED AVAILABEL ON THE MARKET DOES NOT MEET THE MINIMUM PURITY AND GERMINATION PERCENTAGES SPECIFIED, THE SUBCONTRACTOR MUST COMPENSATE FOR A LESSER PERCENTAGE OF PURITY OR GERMINATION BY FURNISHING SUFFICIENT ADDITIONAL SEED TO EQUAL THE SPECIFIED PRODUCT. THE TAGS FROM THE SEED MIXES MUST BE SUPPLIED TO CONTRACTOR AND FORWARDED TO THE COUNTY GESC INSPECTOR. 6. THE FORMULA USED FOR DETERMINING THE QUANTITY OF PURE LIVE SEED (PLS) SHALL BE (POUNDS OF SEED) X (PURITY) X (GERMINATION) = POUNDS OF PURE LIVE SEED (PLS). 7. PERMANENT SEED MIX SHALL BE USED UNLESS OTHERWISE APPROVED BY THE COUNTY. 8. ALL AREAS TO BE SEEDED AND MULCHED SHALL HAVE NATIVE TOPSOIL OR APPROVED SOIL AMMENDMENTS SPREAD TO A DEPTH OF AT LEAST 6 INCHES (LOOSE DEPTH). HAUL ROADS AND OTHER COMPACTED AREAS SHALL BE LOOSENED TO A DEPTH OF 6 INCHES PRIOR TO SPREADING TOPSOIL. 9. SOIL IS TO BE THOROUGHLY LOOSENED (TILLED) TO A DEPTH OF AT LEAST 6 INCHES PRIOR TO SEEDING. THE TOP 6 INCHES OF THE SEED BED SHALL BE FREE OF ROCKS GREATER THAN 4 INCHES AND SOIL CLODS GREATER THAN 2 INCHES. SEEDING OVER ANY COMPACTED AREAS THAT HAVEN'T BEEN THOROUGHLY LOOSENED SHALL BE REJECTED. 10. SEED IS TO BE APPLIED USING A MECHANICAL DRILL TO A DEPTH OF 1/4 INCH. ROW SPACING SHALL BE NO MORE THAN 6 INCHES. MATERIAL USED FOR MULCH SHALL CONSIST OF LONG-STEMMED STRAW. AT LEAST 50 PERCENT OF THE MULCH, BY WEIGHT, SHALL BE 10 INCHES OR MORE IN LENGTH. MULCH SHALL BE APPLIED AND MECHANICALLY ANCHORED TO A DEPTH OF AT LEAST 2 INCHES. MULCH SHALL BE APPLIED AT A RATE OF 4000 LB. OF STRAW PER ACRE. 11. IF THE PERMITTEE DEMONSTRATES TO THE COUNTY THAT IT IS NOT POSSIBLE TO DRILL SEED, SEED IS TO BE UNIFORMLY BROADCAST AT TWO TIMES THE DRILLED RATE, THEN LIGHTLY HARROWED TO PROVIDE A SEED DEPTH OF APPROXIMATELY 1/4 INCH, THEN ROLLED TO COMPACT, THEN MULCHED AS SPECIFIED ABOVE. 12. WHEN SEEDING AND MULCHING IS USED TO STABILIZE DISTURBED AREAS, ALL DISTURBED AREAS WHICH ARE EITHER FINAL GRADED, OR WILL REMAIN INACTIVE FOR A PERIOD OF MORE THAN 30 DAYS SHALL BE REQUIRED TO BE STABILIZED WITHIN 14 DAY OF THE COMPLETION OF THE GRADING ACTIVITIES. THIS MAY REQUIRE MULTIPLE MOBILIZATIONS FOR SEEDING AND MULCHING. 13. MULCH SHALL BE APPLIED WITHIN 24 HOURS OF SEEDING. 14. TRACKIFIER SHOULD BE UTILIZED TO HELP WITH STRAW DISPLACEMENT. SEEDING AND MULCHING MAINTENANCE NOTES: 1. SEEDED AND MULCHED AREAS SHALL BE INSPECTED FOR REQUIRED COVERAGE MONTHLY FOR A PERIOD OF TWO YEARS FOLLOWING INITIAL SEEDING. REPAIRS AND RE-SEEDING AND MULCHING SHALL BE UNDERTAKEN AFTER THE FIRST GROWING SEASON FOR ANY AREAS FAILING TO MEET THE REQUIRED COVERAGE. 2. REQUIRED COVERAGE FOR STANDARD, OPEN SPACE AND LOW GROWTH SEED MIXES SHALL BE AS FOLLOWS: 2.1. THREE (3) PLANTS PER SQUARE FOOT WITH A MINIMUM HEIGHT OF 3 INCHES. THE 3 PLANTS PER SQUARE FOOT SHALL BE OF THE VARIETY AND SPECIES FOUND IN THE APPROVED SEED MIX. 2.2. NO BARE AREAS LARGER THAN 4 SQUARE FEET (TWO-FEET BY TWO-FEET OR EQUIVALENT) 2.3. FREE OF ERODED AREAS. 2.4. FREE FROM INFESTATION OF NOXIOUS WEEDS. 3. REQUIRED COVERAGE FOR TURF GRASS AREAS SHALL BE DEFINED AS FOLLOWS: 3.1. AT LEAST 80% VEGATATIVE COVER OF GRASS SPECIES PLANTED. 3.2. NO BARE AREAS LARGER THAN 4 SQUARE FEET (TWO-FEET BY TWO-FEET OR EQUIVALENT) 3.3. FREE OF ERODED AREAS. 3.4. FREE FROM INFESTATION OF NOXIOUS WEEDS. 4. RILL AND GULLY EROSION SHALL BE FILLED WITH TOPSOIL PRIOR TO RESEEDING, THE RESEEDING METHOD SHALL BE APPROVED BY THE COUNTY. SEED MIX: GALLETA, VIVA 6.999 LB PLS/ACRE INDIAN RICEGRASS, NEZPAR 6.812 LB PLS/ACRE STEAMBANK WHEATGRASS, SODAR 5.817 LB PLS/ACRE ALKALI SACATON, VNS 0.825 LB PLS/ACRE 4-WING SALTBUSH, VNS 0.766 LB PLS/ACRE SHADSCALE SALTBUSH, VNS 0.412 LB PLS/ACRE TOTAL: 26.63 POUNDS PLS/ACRE 2: 1 M A X . 6" (CENTER OF RIPRAP 6" LOWER THAN ENDS) 6" MINIMUM FREEBOARD 12' MIN. SECTION A SECTION B FLOW B 1'3" MIN.2'6' 1'3" MIN. 36" B A PLAN VIEW FLOW A FLO W FL O W SCALE: TYPICAL SEDIMENT TRAP DETAIL NO SCALE6 RIPRAP, TYPE M (D50 3-4") TYP. SMALLER ROCK SIZE MAY BE ALLOWABLE FOR SMALLER TRAPS IF APPROVED BY LOCAL JURISDICTION CHANNEL GRADE MATCH EXISTING GRADE TRANSITION DITCH(ES) INTO SEDIMENT TRAP TOP OF EARTHEN BERM NO SCALE CONSTRUCTION DETAILS C501 2' PRECAST CONCRETE 2' 2' 3' 6" GRANULAR BORROW 3' MIN.TRAVEL SURFACE WIDTH TRAVEL SURFACE NOTES: PREFABRICATED CATTLE GUARD SHALL BE DESIGNED TO WITHSTAND AN HS30 LOADING. PRE-CAST BASE SHALL BE PLACED ON COMPACTED GRANULAR BORROW. COMPACT BACKFILL AGAINST SIDES OF PRE-CAST BASE. ALL CONNECTIONS, HANGERS, FASTENERS, ETC., SHALL BE SUPPLIED BY MANUFACTURER. 2 NO SCALE CATTLE GUARD DETAIL GAT E END PANEL-TYPE II END PANEL-TYPE I FENCE CORNER FENCE CORNER & GATE 8'8' 4'-8" 4'-4" WOOD BRACES TO BE 4" X 4" SQUARE OR 5" DIAMETER ROUND 1 NO SCALE FENCE DETAIL (Applicant’s Copy) Community Development Department 108 8th Street, Suite 401 Glenwood Springs, CO 81601 (970) 945-8212 www.garfield-county.com GRADING PERMIT APPLICATION CHECKLIST GRADING PERMIT REQUIREMENTS A permit is required for any excavation, grading, or earthwork construction including fills and embankments. A grading permit does not permit the construction of retaining walls or other structures. EXEMPTION FROM GRADING PERMIT: • Agricultural Land: Grading, excavation and earthwork, including fills and embankments that are constructed solely for agricultural purposes on lands that are farms or ranches. • Small Projects: Grading that does not exceed 50 cu. yds of earthwork material or 6000 sq.ft. of graded area as long as grading does not change drainage patterns with respect to adjacent properties. • See Amended IBC Appendix J for other exemptions. TYPES OF GRADING PERMITS AND FEES: Payment is due at time of submittal. Make Check payable to: Garfield County Treasurer • Major grading: over 20,000 sq. ft. or over 5000 cubic yards……………………..$400.00 • Minor grading: less than 20,000 sq. ft. and under 5000 cubic yards...……….…$100.00 PERMIT APPLICATION & SUBMITTAL REQUIREMENTS (1 copy required): • Complete application (a one page form is available from the County) • Vicinity Map indicating section, township and range of site, proposed location of grading, and the site’s relation to surrounding roads, municipal boundaries, and water bodies. • Site plan that shows the following within 100 feet of the proposed grading: i. Existing and proposed contours (see exemption below for pipelines) ii. Delineation of area to be disturbed by grading activities iii. Existing structures iv. Existing and proposed roads and driveway v. Property boundaries, right-of-ways and easements vi. Floodplains, intermittent streams, wetlands and other bodies of water • Erosion Control Plan and Details. Plan shows the location of all erosion control measures. • MAJOR GRADING PERMIT ONLY: i. Revegetation and Reclamation Plan. See attached requirements. ii. Financial security for site reclamation. Please allow County to review reclamation cost estimate before providing security. iii. For major grading permits, the plans must be prepared and stamped by a qualified Colorado Professional engineer. • PIPELINES ONLY: The site plan does not need to show topographic contours if the installation of pipeline will not result in changes to the surface grade. • Approved State Stormwater Permit if area disturbed by grading is greater than one acre. • Soils Report: A soils report may not be required if the maximum depth of cut or fill depth is less than 15 feet and native slopes are less than 25%. • Drainage Report: will be required if the County believes that grading may change drainage patterns with regard to adjacent properties, wetlands/water bodies or slopes greater than 25% (Applicant’s Copy) ALL PERMITS MUST COMPLY WITH THE FOLLOWING REQUIREMENTS: • Appendix J- International Building Code as amended. • Garfield County Land Use Code. • Applicable Colorado Department of Public Health and Environment, Water Quality Control Division requirements. • UTILITY LOCTION IS REQUIRED PRIOR TO ANY GRADING. Garfield County Vegetation & Site Reclamation Requirements (Long-Term Disturbed Areas, One Acre or More) Overview: Grading Permits typically require the submission of: • A Site Specific Inventory and Map of county and State Listed Noxious Weeds. • A Weed Management Plan. • A Revegetation and Reclamation Plan. • A Cost Estimate • A Financial Security. The purpose of the plan is to ensure that the development does not result in: (i) erosion and dust generation, (ii) t he propagation of noxious weeds, (iii) the excessive loss of wildlife habitat and food sources, and (iv) long-term visual eyesores. The financial security allows the County to perform reclamation in the case that the developer abandons the project or does not perform adequate reclamation. Required Elements of Vegetation and Reclamation Plan: Section 1 - Soil Handling. Includes: (i) provisions for salvaging on-site topsoil, (ii) a timetable for eliminating topsoil and/or aggregate piles, (iii) plan that provides for soil cover if any disturbances or stockpiles sit exposed for a period of 90 days or more, and (iv) erosion control barriers and dust suppression measures. Section 2 – Weed Management Plan. Includes: (i) a site specific weed inventory along with a site plan showing County Listed Noxious Weeds and Colorado Listed A & B Noxious Weeds (Contact Garfield County Vegetation Management for updated list), (ii) weed management plan that addresses inventoried weeds in a timely and effective manner. (Note: Garfield County may require the submittal for treatment records.) Section 3 – Site Revegetation and Restoration. Includes: (i) plant material list (be specific, scientific and common names require), (ii) planting schedule (to include timing, methods, and provisions for watering, if applicable.) Section 4 – Cost Estimate. Cost estimate is used to determine the amount of the financial security. Line items within the cost estimate include: (i) mobilization, (ii) earthmoving, (iii) seed and planting, (iv) weed- free mulch, erosion control, and dust suppression, (v) irrigation, and (vi) weed management. (Note: For pipelines and projects in which existing grade is the same as final grade, a cost of $2,500/acre can used to determine the financial security.) Financial Security; Bonds, Letter of Credit valid for a minimum of 2 years or Cash. County Inspection and Release of Financial Security: When grading has been completed and vegetation reestablished, the developer (permit holder) phones County Vegetation Manager (970-945-1377 Ext. 4305) and requests an inspection. If restoration is determined to be adequate, the county will inform the development and release the financial security. APPENDIXJ GRADING The provisions contained in this appendix are not mandatory unless specifically referenced in the adopting ordinance. User note: Code change proposals to this chapter will be considered by the IBC- Structural Code Development Committee during the 2016 (Group B) Code Development Cycle. See explanation on page iv. SECTION J101 GENERAL JlOl.l Scope. The provisions of this chapter apply to grad- ing, excavation and earthwork construction, including fills and embankments. Where conflicts occur between the techni- cal requirements of this chapter and the geotechnical report, the geotechnical report shall govern. J101.2 Flood hazard areas. Unless the applicant has submit- ted an engineering analysis , prepared in accordance with standard engineering practice by a registered design profes- sional, that demonstrates the proposed work will not result in any increase in the level of the base flood, grading, excava- tion and earthwork construction, including fills and embank- ments, shall not be permitted in floodways that are in flood hazard areas established in Section 1612.3 or inflood hazard areas where design flood elevations are specified but flood- ways have not been designated. SECTION J102 DEFINITIONS J102.1 Definitions. The following words and terms shall, for the purposes of this appendix, have the meanings shown herein. Refer to Chapter 2 of this code for general definitions. BENCH. A relatively level step excavated into earth material on which fill is to be placed. COMPACTION. The densification of a fill by mechanical means. CUT. See "Excavation." DOWN DRAIN. A device for collecting water from a swale or ditch located on or above a slope, and safely delivering it to an approved drainage facility. EROSION. The wearing away of the ground surface as a result of the movement of wind, water or ice. EXCAVATION. The removal of earth material by artificial means, also referred to as a cut. FILL. Deposition of earth materials by artificial means. GRADE. The vertical location of the ground surface. GRADE, EXISTING. The grade prior to grading. GRADE, FINISHED. The grade of the site at the conclusion of all grading efforts. GRADING. An excavation or fill or combination thereof. 20151NTERNATIONAL BUILDING CODE® KEY. A compacted fill placed in a trench excavated in earth material beneath the toe of a slope. SLOPE. An inclined surface, the inclination of which is expressed as a ratio of horizontal distance to vertical distance. TERRACE. A relatively level step constructed in the face of a graded slope for drainage and maintenance purposes . SECTION J103 PERMITS REQUIRED J103.1 Permits required. Except as exempted in Section 1103.2, no grading shall be performed without first having obtained a pe rmit therefor from the buildin g official. A grad- ing permit does not include the construction of retaining walls or other structures. (See amendment.) Jl03.2 Exemptions. A grading pe rmit shall not be required for the following: 1. Grading in an isolated, self-contained area, provided there is no danger to the public and that such grading will not adversely affect adjoining properties. (See amendment.) 2. Excavation for construction of a structure permitted under this code. 3. Cemetery graves. 4. Refuse disposal sites controlled by other regulations. 5. Excavations for wells, or trenches for utilities. 6. Mining, quarrying, excavating, processing or stockpil- ing rock, sand, gravel, aggregate or clay controlled by other regulations, provided such operations do not affect the lateral support of, or significantly increase stresses in, soil on adjoining properties. 7. Exploratory excavations performed under the direction of a regi stered d e sign professional. Exemption from the permit requirements of this appendix shall not be deemed to grant authorization for any work to be done in any manner in violation of the provisions of this code or any other laws or ordinances of this jurisdiction. 8. Grading that does not exceed 50 cubic yards of earthwork material or 6000 square feet of graded area, whichever is greater. (See amendment.) SECTION J104 PERMIT APPLICATION AND SUBMITTALS J104.1 Submittal requirements. In addition to the provi- sions of Section I 05 .3, the applicant shall state the estimated quantities of excavation and fill. 651 I APPENDIXJ J104.2 Site plan requirements. In addition to the provisions of Section 107, a gradi n g plan haU how the ex i sting g rade and fini hed grad in contour intervals of ufficienl Jarity to indicate the natl.lre and ex tent of the work a nd how in detail that it complies with the requirements of this code. The plans shall show the existing grade on adjoining properties in suffi- cient detail to identify how grade changes will conform to the requirements of this code. Jl04.3 Geotechnical report. A ge technical r port prepared by a registered design professional shall be provided. The report shall contain at least the following: 1. The nature and distribution of existing soils. 2. Conclusions and recommendations for grading proce- dures. 3. Soil design criteria for any structures or embankments required to accomplish the proposed grading. 4. Where necessary, slope stability studies, and recom- mendations and conclusions regarding site geology. Exception: A geotechnical report is not required where the building official determines that the nature of the work applied for is such that a report is not necessary. Jl04.4 Liquefaction study. For sites with mapped maximum considered earthquake spectral response accelerations at short periods (Ss) greater than 0.5g as determined by Section 1613, a study of the liquefaction potential of the site shall be provided and the recommendations incorporated in the plans. Exception: A liquefaction study is not required where the building official determines from established local data that the liquefaction potential is low. SECTION J105 INSPECTIONS JlOS.l General. Inspections shall be governed by Section 110 of this code. Jl05.2 Special inspections. The special inspection require- ments of Section 1705.6 shall apply to work performed under a grading permit where required by the building official. SECTION J106 EXCAVATIONS Jl06.1 Maximum slope. The slope of cut surfaces shall be no steeper than is safe for the intended use, and shall be not more than one unit verlical in two llnits h tizontal (50-per- cent s lope) unle lhe own r or the owner' authorized agent f urnishes a geotech nical report ju tifying a Leeper sl ope. Exceptions: 1. A cut surface shall be permitted to be at a slope of 1.5 units horizontal to one unit vertical (67-percent slope) provided that all of the following are met: 1.1. It is not intended to support structures or surcharges. 1.2. It is adequately protected against erosion. 652 1.3. It is no more than 8 feet (2438 mm) in height. 1.4. It is approved by the building code official. 1.5. Ground water is not encountered. 2. A cut surface in bedrock shall be permitted to be at a slope of one unit horizontal to one unit vertical (1DO- percent slope). SECTION J107 FILLS J107.1 General. Unless otherwise recommended in the geo- technical report, fills shall comply with the provisions of this section. J107.2 Surface preparation. The ground surface shall be prepared to receive fill by removing vegetation, topsoil and other unsuitable materials, and scarifying the ground to pro- vide a bond with the fill material. J107.3 Benching. Where existing grade is at a slope steeper than one unit vertical in .five units horizontal (20-percent slope) and the depth of the fill exceeds 5 feet (1524 mm) benching shall be provided in accordance with Figure 1107.3. A key shall be provided that is at least 10 feet (3048 mm) in width and 2 feet (610 mm) in depth. J107.4 Fill material. Fill material shall not include organic, frozen or other deleterious materials. No rock or similar irre- ducible material greater than 12 inches (305 mm) in any dimension ·hall be included in fills. J107.5 Compaction. All fill material shall be compacted to 90 percent of maximum density as determined by ASTM D 1557, Modified Proctor, in lifts not exceeding 12 inches (305 mm) in depth. Jl07.6 Maximum slope. The slope of fill surfaces shall be no steeper than is safe for the intended use. Fill slopes steeper than one unit vertical in two units horizontal (50-percent slope) shall be justified by a geotechnical report or engineer- ing data. SECTION J108 SETBACKS Jl08.1 General. Cut and fill slopes shall be set back from the property lines in accordance with this section. Setback dimensions shall be measured perpendicular to the property line and shall be as shown in Figure 1108.1, unless substanti- ating data is submitted justifying reduced setbacks. Jl08.2 Top of slope. The setback at the top of a cut slope . hall be not less than that shown in Figure 1108.1, or than is required to accommodate any required interceptor drains, whichever is greater. Jl08.3 Slope protection. Where required to protect adjacent properties at the toe of a slope from adverse effects of the grading, additional protection, approved by the building offi- cial, shall be included. Such protection may include but shall not be limited to: 1. Setbacks greater than those required by Figure 1108.1. 2015 INTERNATIONAL BUILDING CODE® f \ I APPENDIXJ TOP OF FILL - 5 FT. OR GREATER NATURAL SLOPE ,.,. ,.,. ,.,.,. ,.,." 2 FT. MINIMUM ""-10FT. MINIMUM REMOVE UNSUITABLE MATERIAL For SI: 1 foot= 304.8 mm. FIGURE J107.3 BENCHING DETAILS Property Line Property Line H/5 but 2ft.minimum and need not exceed 10ft. maximum I I H/5 but 2ft. minimum' IfP of and need not exceed '• ope 20 ft. maximum 1 I h j , ':% . -- Natural or Finish Grade Natural or Finish Grade Interceptor Drain (if required) For SI: I foot = 304.8 mm. FIGURE J108.1 DRAINAGE DIMENSIONS 20151NTERNATIONAL BUILDING CODE® 653 ) APPENDIXJ 2. Provisions for retaining walls or similar construction. 3. Erosion protection of the fill slopes. 4. Provision for the control of surface waters. SECTION J109 DRAINAGE AND TERRACING Jl09.1 General. Unles otherwi se recomme nded by a reg is· tered desig n professional , drainage faciliti es a nd ten·acing shall be provided in accordance with th requireme nts of rhi · section. Exception: Drainage facilities and terracing need not be provided wh re the gr0und slope is not steeper than one unit verticaJ in three unit hori zontal (33-percent slope). Jl09.2 Terraces. Terraces at least 6 feet (1829 mm) in width shall be established at not more than 30-foot (9144 mm) ver- tical intervals on all cut or fill slopes to control surface drain- SECTION J110 EROSION CONTROL JUO.l General. The faces of cut and fill slopes shall be pre- pared a nd maintained to control erosion. Thi control shall be permitted to consist of effective planting. Exception: Ero ion control measures need not be pro- vided on cut slope not ·ubject to erosion due to the ero- sion-resistant character of the materials. Erosion control for the slopes shall be installed as soon as practicable and prior to calling for final inspection. J110.2 Other devices. Where necessary, check dams, crib- bing, riprap or other devices or methods shall be employed to control erosion and provide safety. SECTION J111 REFERENCED STANDARDS age and debris. Suitable access shall be provided to allow for cleaning and maintenance. Where more than two terraces are required, one terrace, located at approximately mid-height, shall be at least 12 feet (3658 mm) in width. Swal e or ditches . ha ll be provided on terraces. They shall have a minimum gradient of one unit vertical in 20 units hori- zontal (5-percent slope) and shall be paved with concrete not less than 3 inches (76 mm) in thickness, or with other materi- als suitable to the application. They h.all have a depth not less than 12 inches (305 mm and a width not less than 5 feet (1524 mm). A single run of swale or ditch shall not collect runoff from a tributary area e xceeding 13,500 squ are feet (1256 m2) (pro- ject ed ) without di sc harging into a down dra jn. J109.3 Interceptor drains. Interceptor drains shall be in tailed along the top of cut slopes receiving drainage from a tributary width greate r than 40 feet (12 192 mm ) mea ured horizontally. They shall have a minimum depth of 1 foot (305 mm) and a minimum width of 3 fee t (915 mm). The slope shall be approved by the building o.f ficial, but shall be not less than on unit vertical in 50 units horizontal (2-percent sl0pe). The drrun shall be paved with conc re te not less than 3 inche (76 mm) in thickness, or by other materials suitable to the appllcation . Di scharge from the drain shall be accompli hed in a manner to prevent e rosion and shall be approved by the buildi11g official . J109.4 Drainage across property lines. Drainage across pr pert y Jine shall not exceed tha t which existed prior to grading. Exce s or conce ntrated drrunage shall be cont ained on ite or direcled to an approved drainage facility . Eros ion of the g round in !he area of djscharge hall e prevented by instaUation of noneriove d wn drain o r other devices. ASTMD 1557-12 Test Method for Laboratory Compaclion Characteri stics of Soil Using Modified Effort [56,000 ft-lb/ft3 (2,700kN-m/m3 ]. 1107.5 654 20151NTERNATIONAL BUILDING CODE® Amendments to Appendix J lnternational Building Code ltems 40,41,42 Resolution 2016-26 40. Section J103.1 is amended to read as follow: J103.1 Permits required, Except as exempled in Section J103.2, no grading shall be performed without first having obtained a permit from the Garfield County Community Development Department. A grading permit does not include the construction of retaining walls or other structures. Security deposits in a form and amount approved by the Building Official or designee, based upon recommendations from the County Vegetation management Office and the county's designated engineer shall be established prior to issuance of a major grading permit. 41. Section J103.2 (1,) is amended to read as follows: 1. Grading, excavation and earthwork construction, including fills and embankments that are constructed solely for agricultural purposes on lands that are farms or ranches. 42. Section J103,2 is amended to add an Sttt exemption from permit as follows: L Grading that does not exceed 50 cubic yards of earthwork material or 6000 Square Feet of graded area, whichever is greater, X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P O H P OH P OH P OH P OH P OH P OH P OH P OH P OH P OH P OH P X X DRAWN BY: B.D.H. SCALE: DATE DRAWN: 09-15-23 PROJ.NO: CHE02-23-0018 UELS FILE NO.: C-7751 CIVIL ENGINEERING ANDLAND SURVEYING SERVICES 85 South 200 East, Vernal, UT 84078O: 435.789.1017www.uintahgroup.com - SINCE 1964 - CH E V R O N U . S . A . I N C . SK I N N E R R I D G E L A Y D O W N Y A R D GR A D I N G P L A N SE C . 3 6 , T 5 S , R 9 8 W , 6 t h P . M . GA R F I E L D C O U N T Y , C O L O R A D O DA T E B Y RE V I S I O N S FILE: E- F I L E : E: \ B A C K E D \ 2 0 2 3 \ 9 _ S E P \ C H E V R O N \ C - 7 7 5 1 S K I N N E R R I D G E L A Y D O W N Y A R D \ D W G \ C - 7 7 5 1 _ G R A D I N G P L A N . d w g B H E N L I N E 1 0 / 1 8 / 2 0 2 3 1 : 3 4 P M U S E R D E F I N E D I M P E R I A L ( 2 4 . 0 0 X 3 6 . 0 0 I N C H E S ) RESPONSIBLE ENGINEER: RE V SHEET LANDSCAPE PLAN L101 1" = 50' CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU DIG, GRADE, OR EXCAVATE FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES. CALL UTILITY NOTIFICATION CENTER OF COLORADO Know what's below.before you dig.Call R LEGEND: S C A L E 0'25'50' 1" = 50' BARBED WIRE FENCE (FIELD FENCE)X EXISTING EDGE OF ROAD EXISTING PAD EDGE PROPOSED PAD EDGE OHP EXISTING OVERHEAD POWER PROPOSED EDGE OF ROAD EDGE OF RIGHT OF WAY EXISTING MINOR CONTOUR (1') EXISTING MAJOR CONTOUR (5') 0000 0000 PROPOSED MINOR CONTOUR (1') PROPOSED MAJOR CONTOUR (5') 0000 0000 LIMITS OF CONSTRUCTION, LOC LAYDOWN YARD (LOD) SEDIMENT DIVERSION DITCH-1: L - 800 FT DEPTH - 12" MIN. 3:1 SIDE SLOPES, SLOPE: MIN. 0.5% UNLINED TOPSOIL STOCKPILE MAX HEIGHT: 10' SIDE SLOPE: 3:1 7,600 CY 3:1 DD SEDIMENT DIVERSION DITCH-1: L - 800 FT DEPTH - 12" MIN. 3:1 SIDE SLOPES, SLOPE: MIN. 0.5% UNLINED 3:1 3:1 3 : 1 3 : 1 1 F-1.8'FG-5988.4'EG-5986.6' DD Proposed Buried Water Line (To be Field Layed) Existing Culvert Existing Culvert Existing Culvert Install Cattle Guard Clear Creek Surveyed Top of Bank Existing Water Well (To be Abandoned) Tom Creek Existing Top of Bank Existing Treeline Existing Fence Existing Pad Existing Water Trough Existing Water Line Existing 2-Track (To be Removed) Proposed Access Road 24' Wide Proposed Fence Se c t i o n L i n e Se c t i o n 3 5 Se c t i o n 3 6 LAYDOWN YARD TOTAL PAD AREA: ±4.003 AC. LIMITS OF DISTURBANCE BOUNDARY TOTAL AREA: ±7.310 AC. SB SM VTC OVERALL SITE LANDSCAPING DETAILS 174,370 SFPAD AREA REQUIREMENT QTY LANDSCAPE AREA 144,053 SF COUNTY LANDSCAPE REQUIREMENTS: SEED MIX SCHEDULE MIX CONTENTS APPLICATION RATE NATIVE SEED CHEVRON SKINNER RIDGE PIT CLOSE (26.30%) GALLETA, VIVA (25.61%) INDIAN RICEGRASS, NEXPAR (21.87%) STEAMBANK WHEATGRASS, SODAR (3.10%) ALKALI SACATON, VNS (2.88%) 4-WING SALTBUSH, VNS (1.55%) SHADSCALE SALTBUSH, VNS LIMIT OF DISTURBANCE 26.6 LBS OF PLS PER ACRE QTY PLANTING NOTES: SM 4 . FINAL STABILIZATION AND LONG-TERM STORMWATER MANAGEMENT A site is co ns idered finally stabilized when all ground surface d isturbing acti vities at the site have been completed and all disturbed areas have been either built on , compacted, covered, paved, or otherwise stabilized in such a way as to minimize erosion to the extent practicable, or a uniform vegetative cover has been established that reflects a total percent plant cover of at least seventy percent (70%) of pre-disturbance levels or reference areas. Typical seed mix and application rates for Skinner Ridge and Sout h Canyon are present ed below in Tabl e 3 . Table 3 -Approved S eed Mixtures *Ele vations up to 7,000ft* Nat ive M ixture/Variety: Speci es Stream bank Wheatgrass Ga lleta Grass (floret) Alkali Sacation Vari et y Viva Sandy Dropseed (If sandy) Indian Ricegrass Paloma Native a nd Introduced Mixture/Variety: Sp ecies Variety Crested Wheatgrass Ephriam Galleta Grass (floret) Viva Alkali Sacation Sandy Dropseed (If sandy) Indian Ricegrass Paloma Russian Wil drye Bozoisky *Elevations 7,000ft to 9,000ft * Native M ixture/Variet y: Spe ci es V ariet y Chevron U.S.A. Inc. Skinner Ridge and South Canyon SWMP %in mix 25 25 25 25 %i n mix 25 10 15 25 25 %in mix 15 Ra t e (PLS•lb/acre) Drilled Broadcast 2.8 5.6 2.8 5.6 0.4 0.8 3.0 6.0 Rate (PLS•l b/acre) Drille d Broad cast 1.5 3.0 1.1 2.2 0.2 0.4 3.0 6.0 2.5 5.0 Rat e (PLS•lb/acre) Dr illed Broadcast Entrada Consulting Group Thickspike Wheatgrass Western WheatGrass Green Needlegrass Prairie Junegrass Rocky Mtn. Penstemon Fourwing Sa ltbrush Critana Arriba Bandera Native and Introduced Mixture/Variety: Species Pubescent Wheatgrass Western Whatgrass Russian Wildrye Alfalfa Small Burnet Fourwing Saltbrush •PLS = Pure Live Seed Variety Luna Arriba Bozoisky Ladak Delar 25 2.5 5.0 25 4.0 8.0 25 2.5 5.0 15 0.2 0.4 10 0.6 1.2 add on 1.0 2.0 %in mix Rate (PLS•lb/acre) Drilled Broadcast 25 3.5 7.0 25 4.0 8.0 25 2.5 5.0 15 1.2 2 .4 10 3.0 0.0 add on 1.0 2.0 Specific control measures for soil preparation and amendment, soil stabilization , and sediment control during final stabilization will be chosen on a site by site basis, based on soil condition and slope . The control measures chosen will be shown on the site specific maps. The general practices for achieving revegetation are described in EC-2 Temporary and Permanent Seeding in Appendix D. Sites are considered finally stabilized once site preparation and interim reclamation (COGCC Rule 1003) are complete and the above stabilization criteria have been met, even though the site will be disturbed again in the future for final reclamation . Chevron U .S.A. Inc. 16 Entrada Consulting Group Skinner Ridge and South Canyon SWMP United States Department of Agriculture A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa CountiesNatural Resources Conservation Service January 4, 2024 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/nrcs/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/? cid=nrcs142p2_053951). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents Preface....................................................................................................................2 How Soil Surveys Are Made..................................................................................5 Soil Map..................................................................................................................8 Soil Map................................................................................................................9 Legend................................................................................................................10 Map Unit Legend................................................................................................12 Map Unit Descriptions........................................................................................12 Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties........14 28—Cumulic Haploborolls, 1 to 3 percent slopes.......................................14 45—Happle very channery sandy loam, 12 to 25 percent slopes...............15 References............................................................................................................17 4 How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA. The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape. Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil-vegetation-landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries. Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units). Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil 5 scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research. The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas. Soil scientists make many field observations in the process of producing a soil map. The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil-landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil-landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded. These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape. Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties. While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field-observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil. Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date. After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and Custom Soil Resource Report 6 identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately. Custom Soil Resource Report 7 Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 8 9 Custom Soil Resource Report Soil Map 43 8 3 2 5 0 43 8 3 2 9 0 43 8 3 3 3 0 43 8 3 3 7 0 43 8 3 4 1 0 43 8 3 4 5 0 43 8 3 4 9 0 43 8 3 5 3 0 43 8 3 5 7 0 43 8 3 2 5 0 43 8 3 2 9 0 43 8 3 3 3 0 43 8 3 3 7 0 43 8 3 4 1 0 43 8 3 4 5 0 43 8 3 4 9 0 43 8 3 5 3 0 43 8 3 5 7 0 727750 727790 727830 727870 727910 727950 727990 727750 727790 727830 727870 727910 727950 727990 39° 34' 18'' N 10 8 ° 2 0 ' 5 5 ' ' W 39° 34' 18'' N 10 8 ° 2 0 ' 4 4 ' ' W 39° 34' 6'' N 10 8 ° 2 0 ' 5 5 ' ' W 39° 34' 6'' N 10 8 ° 2 0 ' 4 4 ' ' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 12N WGS84 0 50 100 200 300Feet 0 25 50 100 150Meters Map Scale: 1:1,770 if printed on A portrait (8.5" x 11") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties Survey Area Data: Version 16, Aug 22, 2023 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 24, 2020—Jul 8, 2020 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background Custom Soil Resource Report 10 MAP LEGEND MAP INFORMATION imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Custom Soil Resource Report 11 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 28 Cumulic Haploborolls, 1 to 3 percent slopes 0.3 4.5% 45 Happle very channery sandy loam, 12 to 25 percent slopes 6.9 95.5% Totals for Area of Interest 7.2 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, Custom Soil Resource Report 12 onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. Custom Soil Resource Report 13 Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties 28—Cumulic Haploborolls, 1 to 3 percent slopes Map Unit Setting National map unit symbol: jnv6 Elevation: 5,800 to 7,400 feet Mean annual precipitation: 12 to 18 inches Mean annual air temperature: 40 to 46 degrees F Frost-free period: 80 to 110 days Farmland classification: Prime farmland if irrigated and either protected from flooding or not frequently flooded during the growing season Map Unit Composition Cumulic haploborolls and similar soils:90 percent Minor components:10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Cumulic Haploborolls Setting Landform:Flood plains Down-slope shape:Linear Across-slope shape:Linear Parent material:Wasatch shale formation alluvium and/or green river shale formation alluvium Typical profile H1 - 0 to 8 inches: gravelly sandy clay loam H2 - 8 to 20 inches: very channery sandy clay loam H3 - 20 to 28 inches: clay loam H4 - 28 to 60 inches: stratified very gravelly sand to extremely gravelly loamy sand Properties and qualities Slope:1 to 3 percent Depth to restrictive feature:More than 80 inches Drainage class:Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high (0.20 to 1.98 in/hr) Depth to water table:About 36 to 72 inches Frequency of flooding:Occasional Frequency of ponding:None Calcium carbonate, maximum content:10 percent Maximum salinity:Nonsaline to slightly saline (0.0 to 4.0 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 4.6 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: R048AY285CO - Foothill Swale Hydric soil rating: No Custom Soil Resource Report 14 Minor Components Other soils Percent of map unit:10 percent Landform:Flood plains Down-slope shape:Linear Across-slope shape:Linear Hydric soil rating: No 45—Happle very channery sandy loam, 12 to 25 percent slopes Map Unit Setting National map unit symbol: jnvt Elevation: 5,400 to 6,200 feet Mean annual precipitation: 12 to 15 inches Mean annual air temperature: 46 to 52 degrees F Frost-free period: 100 to 150 days Farmland classification: Not prime farmland Map Unit Composition Happle and similar soils:80 percent Minor components:20 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Happle Setting Landform:Mountains, alluvial fans Landform position (two-dimensional):Toeslope Landform position (three-dimensional):Mountainflank Down-slope shape:Convex Across-slope shape:Linear Parent material:Green river formation alluvium derived from shale and/or green river formation colluvium derived from shale Typical profile H1 - 0 to 7 inches: very channery sandy loam H2 - 7 to 14 inches: very channery sandy loam H3 - 14 to 32 inches: very channery sandy clay loam H4 - 32 to 60 inches: extremely channery sandy loam Properties and qualities Slope:12 to 25 percent Depth to restrictive feature:More than 80 inches Drainage class:Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high (0.57 to 2.00 in/hr) Depth to water table:More than 80 inches Frequency of flooding:None Custom Soil Resource Report 15 Frequency of ponding:None Calcium carbonate, maximum content:10 percent Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: Low (about 3.4 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6e Hydrologic Soil Group: B Ecological site: R048AY303CO - Loamy Slopes Hydric soil rating: No Minor Components Toska Percent of map unit:10 percent Hydric soil rating: No Debeque Percent of map unit:10 percent Hydric soil rating: No Custom Soil Resource Report 16 References American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydric soils of the United States. Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States. National Research Council. 1995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/ nrcs/detail/national/soils/?cid=nrcs142p2_054262 Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:// www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053577 Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http:// www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053580 Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. United States Department of Agriculture, Natural Resources Conservation Service. National forestry manual. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/ home/?cid=nrcs142p2_053374 United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/ detail/national/landuse/rangepasture/?cid=stelprdb1043084 17 United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430-VI. http://www.nrcs.usda.gov/wps/portal/ nrcs/detail/soils/scientists/?cid=nrcs142p2_054242 United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/? cid=nrcs142p2_053624 United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. http:// www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf Custom Soil Resource Report 18 Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado JULY 2023 PREPARED FOR Chevron Rockies Business Unit PREPARED BY SWCA Environmental Consultants NATURAL RESOURCES DESKTOP REVIEW AND FIELD SURVEY FOR THE PROPOSED DEVELOPMENT OF SKINNER RIDGE YARD STORAGE, GARFIELD COUNTY, COLORADO Prepared for Chevron Rockies Business Unit 1625 Broadway Street, Suite 2200 Denver, Colorado 80202 Prepared by SWCA Environmental Consultants 295 Interlocken Boulevard, Suite 300 Broomfield, Colorado 80021 (303) 487-1183 www.swca.com July 2023 Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado i EXECUTIVE SUMMARY Chevron Rockies Business Unit contracted SWCA Environmental Consultants (SWCA) to complete a natural resources desktop review and field survey for the proposed development area for Skinner Ridge Yard Storage in Garfield County, Colorado. The proposed development will consist of one yard storage. The field survey consisted of a 500-foot buffer around the proposed yard storage (survey area), a 0.25- mile (1,320-foot) buffer around the proposed development for burrowing owl (Athene cunicularia) (burrowing owl survey area), and a 0.5-mile buffer for raptor nests (raptor survey area). The purpose of this desktop review and field survey was to identify any significant natural resources constraints or risks associated with the proposed development. The survey area is dominated by herbaceous vegetation, rangeland, and oil and gas development. Three National Hydrography Dataset–mapped features are present within the survey area. During the field survey, SWCA identified one wetland, one pond, and three stream features within the survey area. Shrub/scrub and rock cliff faces within 0.5 mile of the survey area provide suitable foraging and breeding habitat for 15 state-listed species and Bureau of Land Management species of concern: American peregrine falcon (Falco peregrinus anatum), bald eagle (Haliaeetus leucocephalus), ferruginous hawk (Buteo regalis), greater sage-grouse (Centrocercus urophasianus), northern goshawk (Accipiter gentilis), western yellow-billed cuckoo (Coccyzus americanus occidentalis), Canada lynx (Lynx canadensis), fringed myotis (Myotis thysanodes), spotted bat (Euderma maculatum), Townsend’s big-eared bat (Corynorhinus townsendii pallescens), white-tailed prairie dog (Cynomys leucurus), midget faded rattlesnake (Crotalus organus concolor), Colorado hookless cactus (Sclerocactus glaucus), and sun- loving meadowrue (Thalictrum heliophilum). There are no previously recorded raptor nests within the raptor survey area. One inactive nest was identified during the field survey, but surrounding areas are suitable habitat for raptor nesting. The potential natural resources constraints or risks associated with the proposed development as described in this report are summarized in Table ES-1. Table ES-1. Summary of Potential Constraints Resource Occurrence in Survey Area Constraint Wetlands and waters of the United States One wetland (WL01) and four waterbodies (WB01-WB04) were identified within the survey area. Avoid identified potential waters of the United States. If unable to avoid, impacts or fill to these features may trigger jurisdictional determination or Clean Water Act Section 404 permitting. Playas Not present within the survey area. None. Federal Emergency Management Agency floodplain Not present within the survey area. None. Groundwater wells None present within the survey area. None. American peregrine falcon (Falco peregrinus anatum) Within expected range of the species, and surrounding rock outcroppings provide suitable habitat. If construction occurs during the breeding season (April 1–July 31), SWCA recommends an additional survey to document that no active nests are present within 0.25 mile of the proposed development prior to ground-disturbing activities. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado ii Resource Occurrence in Survey Area Constraint Bald eagle (Haliaeetus leucocephalus) No mapped nesting or roosting habitat. If construction occurs during the breeding season (December 1–July 31), SWCA recommends an additional survey to document that no active nests are present within 0.5 mile of proposed development prior to ground-disturbing activities. Ferruginous hawk (Buteo regalis) Within expected range of the species, and surrounding rock outcroppings provide suitable habitat. If construction occurs during the breeding season (February 1–July 15), SWCA recommends an additional survey to document that no active nests are present within 0.5 mile of proposed development prior to ground-disturbing activities. Greater sage-grouse (Centrocercus urophasianus) Within expected range of the species, and surrounding shrub/scrub provides suitable habitat. If construction occurs during the breeding season (March 15–August 1), SWCA recommends an additional survey to document that no active leks are present within 0.25 mile of proposed development prior to ground-disturbing activities. Northern goshawk (Accipiter gentilis) Within expected range of the species, and surrounding rock outcroppings provide suitable habitat. If construction occurs during the breeding season (April 1–August 31), SWCA recommends an additional survey to document that no active nests are present within 0.5 mile of proposed development prior to ground-disturbing activities. Western yellow-billed cuckoo (Coccyzus americanus occidentalis) Within expected range of the species, and surrounding riparian areas provide suitable habitat. If construction occurs during the breeding season (June 1–August 31), SWCA recommends an additional survey to document that no active nests are present within the proposed development prior to ground-disturbing activities. Canada lynx (Lynx canadensis) Within species expected range. Surrounding areas have suitable habitat. None. Fringed myotis (Myotis thysanodes) Within expected range of the species, and surrounding rock outcroppings provide suitable habitat. Avoid impacts to surrounding trees, rock faces, and caves. Spotted bat (Euderma maculatum) Within expected range of the species, and surrounding rock outcroppings provide suitable habitat. Avoid impacts to surrounding trees, rock faces, and caves. Townsend’s big-eared bat (Corynorhinus townsendii pallescens) Within expected range of the species, and surrounding rock outcroppings provide suitable habitat. Avoid impacts to surrounding trees, rock faces, and caves. White-tailed prairie dog (Cynomys leucurus) No prairie dog colonies within the survey area. Additionally, potential prairie dog colonies were identified during desktop review that will require field verification. Avoid impacting prairie dog burrows from March 15 to August 31. Midget faded rattlesnake (Crotalus organus concolor) Within expected range of the species, and surrounding rock outcroppings provide suitable habitat. Suitable habitat surrounds proposed development, avoid impacts to rock outcrops. Colorado hookless cactus (Sclerocactus glaucus) Within species expected range, but no known populations within proposed development. Limited risk of impacts expected. Sun-loving meadowrue (Thalictrum heliophilum) Within species expected range, but no known populations within proposed development. Limited risk of impacts expected. Raptor nests One inactive nest within 0.5 mile of survey area. Not at this time. Critical habitat for threatened and endangered species Not present within the survey area. None. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado iii Resource Occurrence in Survey Area Constraint Colorado Parks and Wildlife high priority habitats The proposed yard storage and associated survey area fall within Sportfish Management Waters (1202.c), Elk Severe Winter Range (1202.d), and Elk Winter Concentration Area (1202.d). Proposed development triggers consultation with Colorado Parks and Wildlife under Energy and Carbon Management Commission 1200-series rules. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado iv This page intentionally left blank. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado v CONTENTS 1 Introduction .......................................................................................................................................... 1 1.1 Location ........................................................................................................................................ 1 2 Methods ................................................................................................................................................. 4 2.1 Wetlands and Waters of the United States .................................................................................... 4 2.2 Natural Resources ......................................................................................................................... 4 2.2.1 Wildlife Habitat and Listed Species .................................................................................... 5 3 Results.................................................................................................................................................... 5 3.1 Land Use and Habitat ................................................................................................................... 5 3.2 Wetlands and Waters of the United States .................................................................................... 6 3.3 Natural Resources ......................................................................................................................... 9 3.3.1 Playa Lakes and Ponds ....................................................................................................... 9 3.3.2 Groundwater ....................................................................................................................... 9 3.3.3 Special-Status Species ...................................................................................................... 11 3.3.4 High Priority Habitats ....................................................................................................... 16 3.3.5 Raptors and Migratory Birds ............................................................................................ 19 4 Summary and Conclusion .................................................................................................................. 19 5 Literature Cited .................................................................................................................................. 21 Appendices Appendix A. Natural Resource Survey Record Form Appendix B. Photographs of the Survey Area Figures Figure 1. Proposed development overview. .................................................................................................. 2 Figure 2. Proposed development overview, aerial. ....................................................................................... 3 Figure 3. Delineated aquatic resources within the survey area. .................................................................... 7 Figure 4. Federal Emergency Management Agency 100-year floodplains and probable playas. ................. 8 Figure 5. Mapped aquatic resources within the survey area. ...................................................................... 10 Figure 6. Field-verified biological resources within the survey areas. ....................................................... 17 Figure 7. High priority habitats within the survey areas. ............................................................................ 18 Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado vi Tables Table 1. Waterbody Features Delineated within the Survey Area ................................................................ 6 Table 2. Special-Status Species for Garfield County and Their Potential to Occur in the Survey Area .......................................................................................................................................... 11 Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 1 1 INTRODUCTION Chevron Rockies Business Unit contracted SWCA Environmental Consultants (SWCA) to complete a natural resources desktop review and field survey for the proposed development area for Skinner Ridge Yard Storage in Garfield County, Colorado (Figures 1 and 2). The proposed development will consist of one yard storage. The field survey consisted of a 500-foot buffer around the proposed yard storage (survey area), a 0.25- mile (1,320-foot) buffer around the proposed development for burrowing owl (Athene cunicularia) (burrowing owl survey area), and a 0.5-mile buffer for raptor nests (raptor survey area). The purpose of this desktop review and field survey was to identify any significant natural resources constraints or risks associated with the proposed development. 1.1 Location The survey area is located approximately 18.3 miles northwest of De Beque, Colorado. The center of the survey area is in Sections 25, 26, 35, and 36 of Township (T) 5 South (S), Range (R) 98 West (W); Sections 4 and 5 of T6S R98W and is located 6.0 miles north-northwest of the intersection of Road 211 and Road 204 in Garfield County, Colorado. The approximate center of the survey area is at latitude 39.570549, longitude -108.347024 (see Figure 2). Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 2 Figure 1. Proposed development overview. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 3 Figure 2. Proposed development overview, aerial. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 4 2 METHODS 2.1 Wetlands and Waters of the United States A field survey was conducted within the survey area to visually observe the presence/absence of aquatic resources, including wetlands, perennial and ephemeral streams, and other waterbodies. All National Wetlands Inventory (NWI)–mapped wetlands and National Hydrography Dataset (NHD)–mapped flowlines were evaluated in the field to determine if they are potential waters of the United States (WOTUS). Additionally, features not mapped by the NWI or NHD that are within or directly adjacent to the proposed development area and that exhibit all three wetland parameters (see paragraph below) or an ordinary high-water mark were delineated. SWCA evaluated the potential jurisdictional status of each delineated aquatic resource following the current pre-2015 approach, which was developed following the consolidated U.S. Supreme Court cases, Rapanos v. United States and Carabell v. United States (U.S. Environmental Protection Agency 2008). In general, SWCA’s evaluation of jurisdictional features includes an assessment of feature hydrologic regime (e.g., ephemeral vs. intermittent or perennial), connectivity to downstream waters (e.g., whether the feature would contribute flow to a downstream water in a typical year), proximity (and hydrologic interconnectedness) to the closest WOTUS, and other characteristics that are germane to U.S. Army Corps of Engineers’ jurisdictional determinations. For an area to be considered a wetland, it must contain the following three parameters under normal circumstances: 1) the presence of hydrology showing regular inundation, 2) a predominance of hydrophytic (water-loving) vegetation, and 3) soils characteristic of frequent saturation (i.e., hydric soils). The presence/absence of lotic systems (e.g., creeks, rivers, arroyos, human-made ditches—collectively, streams) is determined by the presence of an ordinary high-water mark, which is a defining element for identifying the lateral limits of non-wetland waters. 2.2 Natural Resources Prior to visiting the proposed development area, SWCA conducted a desktop review of natural resources within 0.5 mile of the survey area using existing data sources. Data sources included aerial photographs, U.S. Geological Survey (USGS) quadrangles, USGS Gap Analysis Project data (USGS 2011), Natural Resources Conservation Service soil survey maps and hydric soils lists (U.S. Department of Agriculture 2023), U.S. Fish and Wildlife Service (USFWS) NWI maps (USFWS 2023a), the NHD (USGS 2023), USFWS lists of threatened and endangered species and state-listed species (USFWS 2023b), Colorado Parks and Wildlife (CPW) range maps and high priority habitats (CPW 2022a, 2022b), Colorado Natural Heritage Program (2022) tracking lists, Energy and Carbon Management Commission (ECMC) (formerly the Colorado Oil and Gas Conservation Commission) well data (ECMC 2023), and Colorado Division of Water Resources (2023) groundwater well data. SWCA biologists conducted the on-site field survey on July 21, 2023, to document general habitat, vegetation, noxious weeds, wildlife, raptor nests, and special-status species within the survey area. The survey did not include any species-specific protocol surveys; however, the presence/absence of suitable habitat for any listed species known to occur in the area was evaluated. Biologists also identified and mapped potential WOTUS, including wetlands, during the on-site survey and performed formal wetland and waterbody delineations within 500 feet of the survey area. The natural resource survey record form is provided in Appendix A, and representative photographs of the survey area are provided in Appendix B. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 5 2.2.1 Wildlife Habitat and Listed Species Biologists recorded general wildlife habitat, vegetation communities, and habitat suitable for special - status species within the survey area. The special-status species evaluated typically consist of 1) all federally protected (i.e., endangered and threatened) species, 2) additional species listed by the USFWS as candidate and proposed species, 3) state-protected species, and 4) migratory birds and raptors. The potential for wildlife species occurrence is based on existing information on distribution and qualitative comparisons of the habitat requirements of each species with vegetation communities, landscape features, and/or water quality conditions in the survey area. The potential for occurrence is summarized according to the following categories: • Known to occur: The species was documented either during or prior to the field survey by a reliable observer. • May occur: The proposed development is within the species’ currently known range, and vegetation communities, soils, and water quality conditions, etc., resemble those known to be used by the species. • Unlikely to occur: The proposed development is within the species’ currently known range, but vegetation communities, soils, and water quality conditions, etc., do not resemble those known to be used by the species. • None: The proposed development is clearly outside the species’ currently known range, and vegetation communities, soils, and water quality conditions, etc., do not resemble those known to be used by the species. Possible impacts to these species are evaluated based on reasonably foreseeable project-related activities and the temporary loss of habitat. 3 RESULTS 3.1 Land Use and Habitat USGS Gap Analysis Project data (USGS 2011) show that the primary land cover class type in the survey area is shrub/scrub. The primary land uses surrounding the survey area include shrub/scrub land and oil and gas development. There are 0 existing oil and gas wells within the survey area and 65 oil and gas wells within 0.5 mile of the survey area (ECMC 2023). Based on our field survey, the survey area primarily consists of oil and gas development and is dominated by big sagebrush (Artemisia tridentata), smooth brome (Bromus inermis), cheatgrass (Bromus tectorum), western wheatgrass (Pascopyrum smithii), mountain mahogany (Cerocarpus montanus), crested wheatgrass (Agropyron cristatum), tall wheatgrass (Thinopyrum ponticum), and kochia (Bassia scoparia). No Class A or Class B noxious weeds are present within the survey area; however, one Class B noxious weed, hardheads (Acroptilon repens), and three Class C noxious weeds, cheatgrass, field bindweed (Convolvulus arvensis), and halogeton (Halogeton glomeratus) are present within the survey area, predominately along oil and gas access roads (Colorado Department of Agriculture 2020). Photographs of the habitat within the proposed development area are provided in Appendix B. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 6 3.2 Wetlands and Waters of the United States NWI- and NHD-mapped features within the survey area were evaluated in the field to determine whether they have the potential to meet current criteria as WOTUS. There are three NHD-mapped features present within the survey area. SWCA biologists identified one wetland (WL01) and four waterbody features (WB01, WB02, WB03, and WB04) during the July 2023 survey (Table 1; Figures 3 and B-3 through B- 7). None of the field-verified water resources were found within the proposed development area. The survey area is not within any Federal Emergency Management Agency 100-year flood hazard zone; the nearest is 15 miles southeast of the survey area (ECMC 2023; Federal Emergency Management Agency 2023) (Figure 4). Table 1. Waterbody Features Delineated within the Survey Area Feature Identification Waterbody Type Mapped by NHD/NWI? Survey Type Acres within Survey Area WL01 Wetland Yes Delineated 0.42 WB01 Pond Yes Delineated 1.03 WB02 Stream Yes Delineated 1.06 WB03 Stream No Delineated 0.03 WB04 Stream Yes Delineated 0.13 Total 2.66 Note: WB = waterbody. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 7 Figure 3. Delineated aquatic resources within the survey area. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 8 Figure 4. Federal Emergency Management Agency 100-year floodplains and probable playas. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 9 3.3 Natural Resources 3.3.1 Playa Lakes and Ponds Playa lakes or ponds are shallow depressions that intermittently fill with water during the spring or as a result of precipitation events, but they are often dry during other parts of the year. Common indicators of playa lakes or ponds are areas devoid of vegetation, areas containing salt crusts (white covering) on the soil surface, or both. Playas can provide important habitat for migratory birds and other wildlife (Rocky Mountain Bird Observatory 2008). No potential playas are mapped within the survey area (Playa Lakes Joint Venture 2019) (see Figure 4). 3.3.2 Groundwater Two permitted groundwater well is mapped within the proposed development area, and 19 groundwater wells are mapped within 0.5 mile of the survey area (Colorado Division of Water Resources 2023) (Figure 5). The survey area was determined to be outside any designated groundwater management areas, designated basins, or Colorado Department of Public Health and Environment Regulation 42–specified areas (ECMC 2023). Groundwater well data (ECMC 2023) for groundwater wells near the survey area show only one groundwater well located within the proposed development area (Permit No. 67473-F), which has a static water depth of 19 feet (see Figure 5). Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 10 Figure 5. Mapped aquatic resources within the survey area. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 11 3.3.3 Special-Status Species Endangered Species Act–listed species (USFWS 2023b) and Colorado State–listed species for Garfield County (Colorado Natural Heritage Program 2022) are summarized in Table 2. SWCA reviewed these lists and considered the habitats that were observed during the field survey to determine if the listed species could occur in the survey area. Those species with the potential to occur within the survey area are further described in the subsections below. Table 2. Special-Status Species for Garfield County and Their Potential to Occur in the Survey Area Common Name (scientific name) Status* Potential to Occur in the Survey Area Amphibians Boreal toad (Anaxyrus boreas) SE Unlikely. Outside species overall range; proposed development occurs too low in elevation for this species to occur. No impacts expected. Great Basin spadefoot (Spea intermontane) BLM sensitive Unlikely. Outside species overall range. No impacts expected. Northern leopard frog (Lithobates pipiens) SC, BLM sensitive Unlikely. Outside species overall range. No impacts expected. Birds American peregrine falcon (Falco peregrinus anatum) SC, BLM sensitive May occur. Within species expected range. No impacts expected unless nesting in close proximity. State Special Concern species (not a statutory category). Bald eagle (Haliaeetus leucocephalus) SC, BLM sensitive May occur. No mapped nesting or roosting habitat. No impacts expected unless nesting in close proximity. Closest mapped eagle nest is 7.8 miles northeast and the closest mapped eagle roost is 16.9 miles southeast along the Colorado River. Black swift (Cypseloides niger) BLM sensitive Unlikely. Outside species overall range; proposed development occurs too low in elevation for this species to occur. No impacts expected. Columbian sharp-tailed grouse (Tympanuchus phasianellus columbianus) SC, BLM sensitive Unlikely. Proposed development is within historical range. No impacts expected. State Special Concern species (not a statutory category). Ferruginous hawk (Buteo regalis) SC, BLM sensitive May occur. Within species expected range. No impacts expected unless nesting in close proximity. State Special Concern species (not a statutory category). Greater sage-grouse (Centrocercus urophasianus) SC, BLM sensitive May occur. Within species expected range. Potential for impacts during breeding season. State Special Concern species (not a statutory category). Greater sandhill crane (Antigone canadensis tabida) SC Unlikely. Outside species overall range. No impacts expected. Mexican spotted owl (Strix occidentalis lucida) FT Unlikely. Lack of suitable old-growth forested habitat. No impacts expected. Northern goshawk (Accipiter gentilis) BLM sensitive May occur. Within species expected range. Potential for impacts during breeding season. Western yellow-billed cuckoo (Coccyzus americanus occidentalis) FT, SC, BLM sensitive May occur. Within species expected range. No impacts expected if riparian areas are avoided. White-faced ibis (Plegadis chihi) BLM sensitive Unlikely. Outside species overall range. No impacts expected. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 12 Common Name (scientific name) Status* Potential to Occur in the Survey Area Fishes Bonytail (Gila elegans) FE Unlikely. Clear Creek unlikely to provide suitable habitat. No impacts expected. Colorado pikeminnow (Ptychocheilus lucius) FE Unlikely. Clear Creek unlikely to provide suitable habitat. No impacts expected. Colorado River cutthroat trout (Oncorhynchus clarkia pleuriticus) SC, BLM sensitive Unlikely. Clear Creek unlikely to provide suitable habitat. No impacts expected. State Special Concern species (not a statutory category). Flannelmouth sucker (Catostomus latipinnis) BLM sensitive Unlikely. Clear Creek unlikely to provide suitable habitat. No impacts expected. Humpback chub (Gila cypha) FT Unlikely. Clear Creek unlikely to provide suitable habitat. No impacts expected. Razorback sucker (Xyrauchen texanus) FE, SE Unlikely. Clear Creek unlikely to provide suitable habitat. No impacts expected. Roundtail chub (Gila robusta) SC, BLM sensitive Unlikely. Clear Creek unlikely to provide suitable habitat. No impacts expected. Mammals Canada lynx (Lynx canadensis) FT, SE May occur. Within species expected range. Surrounding areas have suitable habitat. Fringed myotis (Myotis thysanodes) BLM sensitive May occur. Within species expected range. Suitable habitat surrounds proposed development; avoid impacts to surrounding trees. Gray wolf (Canis lupus) FT None. Extirpated within Colorado. Only potential for lone, dispersing individuals. No impacts expected. Kit fox (Vulpes macrotis) SE, BLM sensitive Unlikely. Outside species overall range. No impacts expected. Spotted bat (Euderma maculatum) BLM sensitive May occur. Within species expected range. Suitable habitat surrounds proposed development; avoid impacts to surrounding trees. Townsend’s big-eared bat (Corynorhinus townsendii pallescens) SC, BLM sensitive May occur. Within species expected range. Suitable habitat surrounds proposed development; avoid impacts to surrounding trees. White-tailed prairie dog (Cynomys leucurus) BLM sensitive May occur. Within species expected range. Suitable habitat within close proximity to proposed development. No colonies were observed within 0.5 mile of proposed development. Wolverine (Gulo gulo) SE Unlikely. Outside species overall range. Only potential for lone, dispersing individuals. No impacts expected. Reptiles Longnose leopard lizard (Gambelia wislizenii) SC, BLM sensitive Unlikely. Outside species overall range. No impacts expected. Midget faded rattlesnake (Crotalus organus concolor) SC, BLM sensitive May occur. Within species expected range. Suitable habitat surrounds proposed development; avoid impacts to rock outcrops. Plants Colorado hookless cactus (Sclerocactus glaucus) FT May occur. Within species expected range, but no known populations within proposed development. Limited risk of impacts expected. DeBeque milkvetch (Astragalus debequaeus) BLM sensitive Unlikely. No suitable habitat within proposed development or surrounding area. No impacts expected. DeBeque phacelia (Phacelia submutica) FT Unlikely. Outside expected range for species. No impacts expected. Eastwood evening-primrose (Chylismia eastwoodiae) BLM sensitive Unlikely. Outside expected range for species. No impacts expected. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 13 Common Name (scientific name) Status* Potential to Occur in the Survey Area Ferron’s milkvetch (Astragalus musiniensis) BLM sensitive Unlikely. Outside expected range for species. No impacts expected. Grand buckwheat (Eriogonum contortum) BLM sensitive Unlikely. Outside expected range for species. No impacts expected. Harrington beardtongue (Penstemon harringtonii) BLM sensitive Unlikely. Within species expected range, but no known populations within proposed development. No impacts expected if suitable habitat is avoided. Montrose bladderpod (Physaria vicina) BLM sensitive Unlikely. Outside expected range for species. No impacts expected. Naturita milkvetch (Astragalus naturitensis) BLM sensitive Unlikely. Outside expected range for species. No impacts expected. Parachute beardtongue (Penstemon debilis) FT Unlikely. Within species expected range, but no known populations within proposed development. No impacts expected if suitable habitat is avoided. Piceance bladderpod (Physaria parviflora) BLM sensitive Unlikely. Within species expected range, but proposed development occurs below the elevations at which this species is known to exist. Roan Cliffs blazingstar (Mentzelia rhizomata) BLM sensitive Unlikely. Within species expected range, but no known populations within proposed development. No suitable habitat was found within the survey area. Rollins’ cat’s-eye (Oreocarya rollinsii) BLM sensitive Unlikely. Outside expected range for species. No impacts expected. Slender rock-brake (Cryptogramma stelleri) BLM sensitive Unlikely. Outside expected range for species. No impacts expected. Sun-loving meadowrue (Thalictrum heliophilum) BLM sensitive May occur. Within species expected range, but no known populations within proposed development. Limited risk of impacts expected. Ute ladies’-tresses (Spiranthes diluvialis) FT Unlikely. Clear Creek fringe wetlands likely provide suitable habitat. Closest know populations are more than 50 miles east on the Colorado River. Source: USFWS (2023b). * FE = federally endangered; FT = federally threatened; SC = state special concern; SE = state endangered; ST = state threatened. 3.3.3.1 AMERICAN PEREGRINE FALCON American peregrine falcon (Falco peregrinus anatum) inhabit open spaces usually associated with high cliffs and bluffs near rivers (CPW 2004). They nest in high cliffs from April 1 through July 31 throughout all elevations in the western half of Colorado (CPW 2004). Their diets consist of small rodents and small to medium-sized birds (CPW 2004). No American peregrine falcon nests were observed within 0.5 mile of the survey area. American peregrine falcon suitable nesting areas were observed within 0.5 mile of the proposed development; however, this species may forage in the surrounding areas. 3.3.3.2 BALD EAGLE Bald eagle (Haliaeetus leucocephalus) feed on fish and carrion and typically roost in large trees near a water source (USFWS 2007). In Colorado, they are often found near reservoirs, especially in areas with abundant fish (USFWS 2007). CPW recommends no surface occupancy within 0.25 mile of bald eagle nests and roosts. If active, nests should be avoided by 0.5 mile from December 1 through July 31, and roosts should be avoided by 0.5 mile from November 15 through March 15 (CPW 2020). The closest known eagle roosting habitat is associated with the Colorado River and is approximately 16.9 miles southeast of the proposed development. The closest known nesting location is approximately 7.8 miles northeast of the proposed development. Individuals may occasionally fly over or forage within the survey area (CPW 2022b). Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 14 3.3.3.3 CANADA LYNX Canada lynx (Lynx canadensis) are closely associated with subalpine forests in the Rocky Mountain ranges. They are likely found in areas with deep snow and dense horizontal forest cover that support their primary prey, snowshoe hare (Lepus americanus) (USFWS 2005). Lynx can disperse long distances when prey becomes scarce (USFWS 2005). The survey area is within mapped overall range for Canada lynx. Subalpine forests in surrounding areas contain foraging habitat for the species, but the species is unlikely to be associated with development. This species is unlikely to occur within the survey area. Individuals may occur while moving from different patches of forested habitat, although this is unlikely. 3.3.3.4 COLORADO HOOKLESS CACTUS Colorado hookless cactus (Sclerocactus glaucus) occur along the Colorado River, Gunnison River, and their tributaries (Spackman et al. 1997). They generally occur on gravelly or rocky slopes with soils that are coarse, above the river floodplains, and in Mancos shale (Spackman et al. 1997). Associated vegetation is typically desert scrub. The survey area is within mapped overall range for Colorado hookless cactus (Spackman et al. 1997). There is suitable habitat within the survey area, but there are no known populations within 0.5 mile of the survey area. During the July 2023 survey, no Colorado hookless cactus were identified within the survey area. 3.3.3.5 FERRUGINOUS HAWK Ferruginous hawks (Buteo regalis) inhabit open grasslands and shrub steppe communities (Colorado Division of Wildlife 2003). They nest in isolated trees, on rock outcrops, or on the ground from February 1 through July 15. Migrants and winter residents may also occur in shrublands and agricultural areas (Colorado Division of Wildlife 2003). Black-tailed prairie dog (Cynomys ludovicianus) is an important prey species for the hawk in Colorado, and ferruginous hawks winter in areas with prairie dog colonies (Colorado Division of Wildlife 2003). No ferruginous hawk nests were observed within 0.5 mile of the survey area. Ferruginous hawk suitable nesting areas were observed within 0.5 mile of the proposed development; however, this species may forage in the surrounding agricultural lands and grasslands. 3.3.3.6 FRINGED MYOTIS Fringed myotis (Myotis thysanodes) forage in fir-pine forests, ponderosa pine forests, and lowland scrubland (Adams 2003). They roost in rock crevices, abandoned mines, caves, and abandoned buildings (Adams 2003). The survey area is within mapped overall range for fringed myotis. Rock crevices and caves are found in close proximity to the survey area. Given this, this species may be found to roost in the rock cliffs and outcroppings; therefore, impacts to these areas should be avoided. 3.3.3.7 GREATER SAGE-GROUSE Greater sage-grouse (Centrocercus urophasianus) occur in big sagebrush and sagebrush shrub-steppe (Wickersham 2016). They utilize grasslands, wet meadows, hay meadows, montane shrublands, and aspen groves (Wickersham 2016). They form leks to breed and nest on the ground under sagebrush or other shrub from mid-March through early May (Wickersham 2016). The survey area is within mapped overall range for greater sage-grouse. There is no suitable habitat within the survey area but there is known sage grouse habitat within 0.5 mile of the survey area along the sage steppes. Impacts to these sage steppes should be avoided; if they cannot be avoided, clearance surveys should occur for this species. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 15 3.3.3.8 MIDGET FADED RATTLESNAKE Midget faded rattlesnake (Crotalus organus concolor) are closely associated with river-carved canyon habitat and areas created by the Colorado River and its tributaries (Schuett et al. 2016). They can occur in arid high grasslands, sagebrush steppe, arid and rocky habitat (Schuett et al. 2016). They forage in rocks and sagebrush steppe, and breeding occurs from mid-July through late August (Schuett et al. 2016). They overwinter together in rocky, south-facing denning structures (Schuett et al. 2016). The survey area is within mapped overall range for midget faded rattlesnakes. Suitable foraging habitat was observed within the survey area. No individuals were observed during the site survey, but if they are observed frequently before construction, surveys should be conducted to determine if a den is within the survey area. 3.3.3.9 NORTHERN GOSHAWK Northern goshawk (Accipiter gentilis) are habitat generalists but are found mostly in conifer and mixed conifer-aspen forests (Wickersham 2016). They forage in forests, sagebrush-steppe, and riparian areas (Wickersham 2016). They usually nest in mature forest stands, including aspen, piñon-juniper woodlands, pine, or fir trees from April 1 through August 31 (Wickersham 2016). No northern goshawk nests were observed within 0.5 mile of the survey area. Suitable nesting and foraging areas were observed within 0.5 mile of the proposed development; however, this species may also forage in the surrounding sagebrush- steppe. 3.3.3.10 SPOTTED BAT Spotted bat (Euderma maculatum) forage in desert scrub, semi-desert scrub, and piñon-juniper woodlands (Adams 2003). They roost in rock crevices located on high cliffs (Adams 2003). The survey area is within mapped overall range for spotted bat. Surrounding habitat includes semi-desert scrub, and rock crevices, and cliff faces are found in close proximity to the survey area. Given this, this species may be found to forage and roost in the surrounding habitat and rock cliffs, and impacts to these areas should be avoided. 3.3.3.11 SUN-LOVING MEADOWRUE Sun-loving meadowrue (Thalictrum heliophilum) occur in open sunny sites on sparsely vegetated and dry shale slopes (Spackman et al. 1997). Soils are usually made from the Green River Shale Formation (Spackman et al. 1997). The survey area is within mapped overall range for sun-loving meadowrue. There is suitable habitat within the survey area, but there are no known populations within 0.5 mile of the survey area. During the July 2023 survey, no sun-loving meadowrue were identified within the survey area. 3.3.3.12 TOWNSEND’S BIG-EARED BAT Townsend’s big-eared bat (Corynorhinus townsendii pallescens) forage in mixed coniferous forest, semi- desert scrub, and piñon-juniper woodlands (Adams 2003). They roost in caves and abandoned mines, and abandoned buildings (Adams 2003). The survey area is within mapped overall range for Townsend’s big- eared bat. Surrounding habitat includes semi-desert scrub, and caves are found in close proximity to the survey area. Given this, this species may be found to forage and roost in the surrounding habitat and caves, and impacts to these areas should be avoided. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 16 3.3.3.13 WESTERN YELLOW-BILLED CUCKOO Western yellow-billed cuckoo (Coccyzus americanus occidentalis) inhabit mature riparian woodlands with dense, woody understory vegetation (Wickersham 2016). They nest in willow (Salix sp.), cottonwood (Populus sp.), hackberry (Celtis sp.), soapberry (Sapindus sp.), and cultivated fruit trees (Wickersham 2016). They breed from June to August. No western yellow-billed cuckoo nests were observed within the survey area. Suitable nesting areas were observed within 0.5 mile of the proposed development; riparian areas should be avoided. 3.3.3.14 WHITE-TAILED PRAIRIE DOG In Colorado, white-tailed prairie dog (Cynomys leucurus) occur in open shrublands, semi-desert grasslands, and mountain valleys (Armstrong et al. 2011). These burrowing mammals live in colonies consisting of territorial family groups. Prairie dog colonies can provide habitat for other sensitive species, including black-footed ferret (Mustela nigripes), mountain plover (Charadrius montanus), and burrowing owl. Based on field survey results, there were no prairie dog colonies within the survey area. In addition to the July 2023 field survey, SWCA performed a desktop analysis for prairie dog colonies visible on aerial imagery within 0.5 mile of the proposed development. The results of the desktop analysis did not identify areas that exhibited aerial signatures indicative of potential prairie dog colonies within the 0.5 mile of the survey area (Figure 6). 3.3.4 High Priority Habitats High priority habitats are areas designated by CPW based on listed species, species spatial data, and developed best management practices to reduce impacts to sensitive species, time frames, and habitats. These areas are designated to ensure that land use development recommendations are consistent statewide. The survey area falls within three high priority habitats. The survey area falls within the Sportfish Management Waters (1202.c); CPW states that there should be no surface occupancy or disturbance within 500 feet of these aquatic resources (Figure 7) (CPW 2022a). The survey area also falls within the Elk Severe Winter Range (1202.d) and Elk Winter Concentration Area (1202.d); therefore, activities cannot occur between December 1 through April 30 (see Figure 7) (CPW 2022a). Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 17 Figure 6. Field-verified biological resources within the survey areas. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 18 Figure 7. High priority habitats within the survey areas. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 19 3.3.5 Raptors and Migratory Birds The USFWS protects several avian species under the Migratory Bird Treaty Act of 1918 (MBTA). The MBTA makes it illegal for anyone to take, possess, import, export, transport, sell, purchase, barter, or offer for sale any migratory bird or the parts, nests, or eggs of such a bird except under the terms of a valid permit issued by the USFWS. Some raptors may potentially forage or nest in the raptor survey areas, including the American peregrine falcon, bald eagle, ferruginous hawk, and northern goshawk, as discussed above. In addition, the Cooper’s hawk (Accipiter cooperii), northern harrier (Circus cyaneus), red-tailed hawk (Buteo jamaicensis), and sharp-shinned hawk (Accipiter striatus) commonly nest in Garfield County. During the field survey, one inactive raptor nest was recorded within the raptor survey area (see Figure 6). Suitable nesting habitat was identified within the survey area. If construction occurs from February 1 through August 31, a raptor nest survey should be conducted to identify any active nests. Ground-nesting species protected by the MBTA likely nest in the survey area during the nesting season (approximately April 1–July 31) due to the presence of grassland habitat. The U.S. Southern District Court of New York vacated the Department of Interior’s Solicitor’s M-37041 Opinion on Migratory Birds in 2020. This change means that incidental take (pursue, hunt, take, capture or kill and/or attempt to take, capture, kill, or possess) is again prohibited under the MBTA, and any impacts to nesting bird species during construction of the proposed development would be in violation of the MBTA. If construction occurs during the migratory bird nesting season (approximately April 1–July), SWCA recommends that the proposed development area be maintained and mowed regularly. Additionally, a preconstruction survey should be conducted to clear the proposed development area before construction initiation. MBTA clearance surveys would involve chain or rope dragging or systematic pedestrian surveys within the proposed development area to document the presence/absence of ground-nesting birds. 4 SUMMARY AND CONCLUSION In July 2023, SWCA conducted a desktop review and on-site field surveys to determine if protected natural resources occur within or near the proposed development area. The dominant land cover in the survey area is shrub/scrub and includes oil and gas development. SWCA delineated one wetland (WL01) and four waterbody features (WB01, WB02, WB03, and WB04) totaling 2.66 acres within the Skinner Ridge Yard Storage survey area (see Table 1, see Figure 3). Based on NWI and NHD maps, field surveys, and proximity of the proposed development to the nearest aquatic resources, disturbance from construction is not anticipated to impact potentially jurisdictional aquatic resources; therefore, proposed yard storage construction is not expected to trigger permitting under Section 404 of the Clean Water Act (U.S. Environmental Protection Agency 2008). These aquatic resources are likely to be considered WOTUS, and it is recommended that impacts are avoided, where possible. The findings presented in this report should be considered preliminary pending review and confirmation by the U.S. Army Corps of Engineers. ECMC permitting is still expected to include consultation regarding Rule 1202(3) because the proposed pad will likely include chemical storage facilities within 500 feet of an aquatic resource (see Table 1; see Figures 3–6). The current process requires operators to submit a variance request through a formal hearings application. Variance applications must demonstrate the following under Rule 502.c: 1) that the operator has made a good faith effort or is unable to comply with the rule; 2) that the requested variance will not violate the basic intent of the Act; 3) that the requested variance is necessary to avoid an undue hardship; 4) that granting the variance will result in no adverse impact to public health, safety, welfare, the environment, or wildlife Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 20 resources; and 5) that the requested variance contains reasonable mitigation measures to avoid, minimize, or mitigate adverse impacts to public health, safety, welfare, the environment, and wildlife resources. Rock outcroppings provide suitable foraging habitat for American peregrine falcons, bald eagles, ferruginous hawks, northern goshawk, and other raptors. Surrounding shrub/scrub and riparian habitat provides suitable nesting habitat for greater sage-grouse and western yellow-billed cuckoo. Shrub/scrub habitat that may provide suitable nesting habitat for migratory birds is present within and adjacent to the proposed development. Additionally, suitable habitat for raptor species (e.g., trees) was observed within the raptor survey areas and 0.5 mile of the survey area. One inactive raptor nest was observed within 0.5 mile of the survey area. The field survey was conducted within the CPW-recognized breeding season for some common raptor species in Garfield County (i.e., bald eagles, ferruginous hawks and northern goshawks) (CPW 2020). If planned activities are prolonged several weeks beyond their initiation date, SWCA recommends subsequent nest checks to clear the area of any new nesting activity. No migratory bird nests were recorded during the July 2023 survey; however, if construction is to occur in the spring or summer during the migratory bird nesting season, SWCA recommends preconstruction nest surveys to identify and avoid impacts to migratory birds. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 21 5 LITERATURE CITED Adams, R.A. 2003. Bats of the Rocky Mountain West: Natural History, Ecology, and Conservation. Boulder, Colorado; The University Press of Colorado. Armstrong, D.M., J.P Fitzgerald, and C.A. Meaney. 2011. Mammals of Colorado: Second Edition. Louisville, Colorado; University Press of Colorado. Colorado Department of Agriculture. 2020. Noxious Weed Species ID. Available at: https://colorado.gov/pacific/agconservation/noxious-weed-species. Accessed July 2023. Colorado Division of Water Resources. 2023. Colorado’s Well Permit Search. Available at: https://dwr.state.co.us/Tools/WellPermits. Accessed July 2023. Colorado Division of Wildlife. 2003. Conservation Plan for Grassland Species in Colorado. 205 pp. Available at: https://cpw.state.co.us/Documents/WildlifeSpecies/Grasslands/wholeplan.pdf. Accessed July 2023. Colorado Natural Heritage Program. 2022. Tracking List. Available at: https://cnhp.colostate.edu/ourdata/trackinglist/custom-tracking/. Accessed July 2023. Colorado Parks and Wildlife (CPW). 2004. Peregrine Falcon Biology and Management in Colorado. Available at: https://cpw.state.co.us/Documents/WildlifeSpecies/Profiles/PEREGRINE.pdf. Accessed July 2023. ———. 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#search=seasonal%20restrictions. Accessed July 2023. ———. 2022a. Colorado Parks and Wildlife – HPH COGCC SB181 Data. Available at: https://www.arcgis.com/home/group.html?id=280f7c0420604edaa66ed6c0311d31d9#overview. Accessed July 2023. ———. 2022b. Species Activity Data. Available at: http://arcg.is/UtvBHE. Accessed July 2023. Energy and Carbon Management Commission (ECMC). 2023. ECMC Interactive Map. Available at: https://ecmc.state.co.us/maps.html#/gisonline. Accessed July 31, 2023. Federal Emergency Management Agency. 2023. National Flood Hazard Layer. Available at: https://www.fema.gov/national-flood-hazard-layer-nfhl. Accessed July 2023. Playa Lakes Joint Venture. 2019. Maps of Probable Playas. Available at: http://pljv.org/for-habitat- partners/maps-and-data/maps-of-probable-playas/. Accessed July 2023. Reveal, J.L. 2002. Mentzelia rhizomata (Loasaceae: Mentzelioideae), a new species from western Colorado. Systematic Botany 27(4):763-767. Rocky Mountain Bird Observatory. 2008. Assessment and Conservation of Playas in Eastern Colorado. Final report to the Colorado Division of Wildlife, Playa Lakes Joint Venture, U.S. Environmental Protection Agency, and the U.S. Fish and Wildlife Service. Natural Resources Desktop Review and Field Survey for the Proposed Development of Skinner Ridge Yard Storage, Garfield County, Colorado 22 Spackman, S., B. Jennings, J. Coles, C. Dawson, M. Minton, A. Kratz, and C. Spurrier. 1997. Colorado rare plant field guide. Prepared for Bureau of Land Management, U.S. Forest Service and U.S. Fish and Wildlife Service by Colorado Heritage Program. Schuett, G.W., M.J. Feldner, C.F. Smith, and R.S. Reiserer. 2016. Rattlesnakes of Arizona. Rodeo, New Mexico; Eco Publishing. U.S. Department of Agriculture. 2023. Web Soil Survey. Available at: https://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx. Accessed July 2023. U.S. Environmental Protection Agency. 2008. Clean Water Act Jurisdiction Following the U.S. Supreme Court’s Decision in Rapanos v. United States and Carabell v. United States. Available at: https://www.epa.gov/sites/default/files/2016- 02/documents/cwa_jurisdiction_following_rapanos120208.pdf. Accessed July 2023. U.S. Fish and Wildlife Service (USFWS). 2005. Recovery Outline: Contiguous State Distinct Population Segment of the Canada Lynx. Available at: https://ecos.fws.gov/docs/recovery_plan/final%20draft%20Lynx%20Recovery%20Outline%209 -05.pdf. Accessed July 2023. ———. 2007. National Bald Eagle Management Guidelines. Available at: https://www.fws.gov/sites/default/files/documents/national-bald-eagle-management- guidelines_0.pdf. Accessed July 2023. ———. 2023a. National Wetlands Inventory. Available at: https://www.fws.gov/program/national- wetlands-inventory/data-download. Accessed July 2023. ———. 2023b. IPaC, Information for Planning and Consultation, Garfield County, Colorado, Natural Resources of Concern. Available at: http://ecos.fws.gov/ipac. Accessed July 2023. U.S. Geological Survey (USGS). 2011. GAP/LANDFIRE National Terrestrial Ecosystems 2011. Available at: https://gapanalysis.usgs.gov/gaplandcover/viewer/. Accessed July 2023. ———. 2023. National Hydrography Dataset. Available at: http://nhd.usgs.gov/data.html. Accessed July 2023. Wickersham, L.E. (Ed.). 2016. The Second Colorado Breeding Bird Atlas. Denver, Colorado; Colorado Bird Atlas Partnership. APPENDIX A Natural Resource Survey Record Form A-1 Table A-1. Natural Resource Survey Record Form Natural Resource Survey Record Survey Date(s): 7/21/2023 Surveyor(s): Chase Westbrook and Peter Gordon Project Name: Skinner Ridge Yard Storage Project type (well pad, facility, pipeline): Yard Storage Location: Garfield County, Colorado Project staked? No Full access to location? If no, explain: Yes Land use(s): Rangeland, oil and gas Vegetation Community (include dominant vegetation and major species present): Big sagebrush, smooth brome, cheatgrass, western wheatgrass, mountain mahogany, crested wheatgrass, tall wheatgrass, and kochia. Resource Yes No Notes Waters of the United States (wetland, stream, ditch, other) X 1 wetland, 1 pond, 3 streams Playas X Riparian/Preble’s jumping mouse habitat X Ute ladies’-tresses/Colorado butterfly plant habitat X Raptor nest or habitat X 1 inactive nest, rock outcrops Bald eagle nest or roost X Other migratory bird nest X Prairie dog/burrowing owl X Mountain plover or habitat X A-2 Natural Resource Survey Record Plains sharp-tailed grouse lek X Great blue heron rookery X Swift fox den or habitat X Big game X Noxious weeds X Hardheads, cheatgrass, field bindweed, and halogeton Other APPENDIX B Photographs of the Survey Area B-1 Figure B-1. Overview of the landscape within the survey area; view facing south. Figure B-2. Overview of the landscape within the survey area; view facing south. B-2 Figure B-3. Overview of WL01; view facing north. Figure B-4. Overview of WB01; view facing north. B-3 Figure B-5. Overview of WB02; view facing south. Figure B-6. Overview of WB03; view facing west. B-4 Figure B-7. Overview of WB04; view facing west. Aquatic Resources Inventory Report for the Proposed Development of the Skinner Ridge Yard Storage, Garfield County, Colorado JULY 2023 PREPARED FOR Chevron Rockies Business Unit PREPARED BY SWCA Environmental Consultants AQUATIC RESOURCES INVENTORY REPORT FOR THE PROPOSED DEVELOPMENT OF THE SKINNER RIDGE YARD STORAGE, GARFIELD COUNTY, COLORADO Prepared for Chevron Rockies Business Unit 1625 Broadway Street, Suite 2200 Denver, Colorado 80202 Prepared by SWCA Environmental Consultants 295 Interlocken Boulevard, Suite 300 Broomfield, Colorado 80021 (303) 487-1183 www.swca.com July 2023 Aquatic Resources Inventory Report for the Proposed Development of the Skinner Ridge Yard Storage, Garfield County, Colorado i CONTENTS 1 Introduction .......................................................................................................................................... 1 2 Methods ................................................................................................................................................. 1 2.1 Desktop Review ............................................................................................................................ 1 2.2 Field Survey .................................................................................................................................. 1 2.2.1 Mapping .............................................................................................................................. 2 2.2.2 Wetlands ............................................................................................................................. 2 2.2.3 Non-wetland Waters ........................................................................................................... 2 3 Results.................................................................................................................................................... 2 3.1 General Observations and Desktop Review ................................................................................. 3 3.2 Field Survey .................................................................................................................................. 3 3.2.1 Wetlands ............................................................................................................................. 4 3.2.2 Non-wetland Waters ........................................................................................................... 4 4 Summary and Recommendations ....................................................................................................... 5 5 Literature Cited .................................................................................................................................... 6 Appendices Appendix A. Aquatic Resources Inventory Maps Appendix B. Wetland Determination Data Forms Appendix C. Photographs of the Survey Area Appendix D. Natural Resources Conservation Service Soil Report for the Survey Area Tables Table 1. Monthly Recorded Precipitation at the Grand Junction, Colorado, Weather Station ..................... 3 Table 2. Wetlands Identified within the Survey Area ................................................................................... 4 Table 3. Waterbodies Identified within the Survey Area .............................................................................. 4 Aquatic Resources Inventory Report for the Proposed Development of the Skinner Ridge Yard Storage, Garfield County, Colorado ii This page intentionally left blank. Aquatic Resources Inventory Report for the Proposed Development of the Skinner Ridge Yard Storage, Garfield County, Colorado 1 1 INTRODUCTION On behalf of Chevron Rockies Business Unit (Chevron), SWCA Environmental Consultants (SWCA) completed an aquatic resources inventory, commonly referred to as a wetland delineation, for the proposed development of the Skinner Ridge Yard Storage in Garfield County, Colorado (Figure A-1 in Appendix A). SWCA evaluated and delineated wetlands and other aquatic resources that are within 500 feet of the proposed yard storage area (survey area). The approximate center point of the proposed development is at latitude 39.570582°, longitude - 108.346939° (see Figure A-1). The goal of this aquatic resources inventory is to identify aquatic resources containing an ordinary high-water mark (OHWM) or wetland within 500 feet of the proposed development in order to comply with the Energy & Carbon Management Commission’s (ECMC’s; formerly Colorado Oil and Gas Conservation Commission) Rule 1202(3). The aquatic resources inventory included the identification and recording of features that may be determined to be waters of the United States (WOTUS) by the U.S. Army Corps of Engineers (USACE). WOTUS include waterbodies, such as rivers, creeks, streams, arroyos, lakes, and associated wetlands that have connectivity to downstream navigable waters or tidal seas. Under the Clean Water Act, wetlands are aquatic resources that are inundated or saturated by surface water or groundwater at a frequency and duration sufficient to support, and under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions (USACE 1987). Non-wetland waters are generally identified and delineated by the presence of an OHWM, which is a defined boundary on the shore or bank of an aquatic resource established by water fluctuations and movement. 2 METHODS The aquatic resources inventory included a desktop review of existing data and a field survey. The following sections provide a summary of the methods used to collect data and generate aquatic resource mapping. 2.1 Desktop Review SWCA conducted a desktop review of existing spatial data prior to the field survey to identify areas with the greatest potential for aquatic resources. Sources used during the desktop review included U.S. Geological Survey (USGS) 7.5-minute quadrangles, U.S. Fish and Wildlife Service (USFWS) National Wetlands Inventory (NWI) maps (USFWS 2023), the National Hydrography Dataset (NHD) (USGS 2023), the USGS StreamStats tool (Version 4.14.0) (USGS 2020), Natural Resources Conservation Service (NRCS) soil survey maps (NRCS 2023a), and historic and current aerial photographs of the survey area (Google Earth 2023; NETROnline 2023). 2.2 Field Survey SWCA conducted the aquatic resources field survey on July 21, 2023. SWCA biologists performed formal wetland and waterbody delineations within 500 feet of the proposed oil and gas location on accessible parcels crossed by the proposed development. The following sections provide a summary of the methods used during the field survey to collect data and generate aquatic resource mapping. Aquatic Resources Inventory Report for the Proposed Development of the Skinner Ridge Yard Storage, Garfield County, Colorado 2 2.2.1 Mapping A handheld global positioning system (GPS) receiver with sub-meter accuracy was used to record delineated wetland and waterbody boundaries and geographically reference data points during the field survey. Geographic information system (GIS) software was used to analyze recorded features, calculate areas, and generate the survey area maps. When potential wetland or non-wetland waters within the survey area were located on adjacent land for which Chevron did not have access permission or extended outside of accessible parcels, SWCA visually confirmed these resources from available access points and digitized boundaries using the best available aerial imagery. 2.2.2 Wetlands The presence/absence of wetlands was determined in the field using delineation methods provided in the Corps of Engineers Wetlands Delineation Manual (Manual) (USACE 1987) and the Regional Supplement to the Corps of Engineers Wetlands Delineation Manual: Great Plains Region (Version 2.0) (Regional Supplement) (USACE 2010). Data at each potential wetland were recorded on the Regional Supplement wetland determination data forms. Determination of wetland habitat (type) is based on the classification system developed by Cowardin et al. (1979). Per the Manual and Regional Supplement, wetlands are present in areas where three wetland parameters (i.e., wetland hydrology, hydric soils, and hydrophytic vegetation community) are present under normal circumstances. The presence of these wetland parameters is determined using the indicators provided in the Regional Supplement. One data point is recorded within each potential wetland (or wetland type for proximate, similar wetlands) along with a corresponding upland data point. These data provided the basis for mapped wetland-upland boundaries. 2.2.3 Non-wetland Waters The presence and extent of non-wetland waters (e.g., constructed ditches and reservoirs, active channels, and ponds) was determined in the field using the guidance and methods provided in the USACE Regulatory Guidance Letter No. 05-05 (USACE 2005) and the USACE’s A Field Guide to the Identification of the Ordinary High Water Mark (OHWM) in the Arid West Region of the Western United States (USACE 2008) (Technical Guidance). An OHWM is the line on a shore established by fluctuations of water and is typically identified by physical characteristics, such as a clear, natural line impressed on the bank; shelving; changes in the character of soil; destruction of terrestrial vegetation; the presence of litter and debris; or other appropriate means that consider the characteristics of the surrounding areas. The spatial extent of non-wetland waters is delineated using the identified OHWM for each feature. Non-wetland waters were characterized hydrologically as ephemeral, intermittent, or perennial waters. Ephemeral features flow only in direct response to precipitation or snowfall and flow for a brief period of time. Intermittent waters have prolonged flow that is sustained (at least in part) by melting snowpack or a groundwater source. Perennial waters flow continuously but may have periods of less flow. According to the USACE Manual and Technical Guidance (USACE 1987, 2008), erosional features that lack an OHWM or a continuous OHWM are not WOTUS. 3 RESULTS The results of the desktop review and field survey for the Skinner Ridge Yard Storage are presented in the following sections. Maps of the survey area are provided in Appendix A, copies of the wetland determination data forms are provided in Appendix B, representative photographs of the survey area are provided in Appendix C, and the NRCS soil report for the survey area is provided in Appendix D. Aquatic Resources Inventory Report for the Proposed Development of the Skinner Ridge Yard Storage, Garfield County, Colorado 3 3.1 General Observations and Desktop Review The Skinner Ridge Yard Storage survey area is in the Colorado Headwaters-Plateau (14010005), roughly 5,840 feet above sea level (see Figure A-1). The survey area terrain is flat, generally sloping to the southwest, and primarily consists of oil and gas development (Figures C-1–4 in Appendix C). Based on data provided by the USGS StreamStats tool, the survey area is in an approximately 99.5-square-mile drainage basin that receives approximately 20.6 inches of mean annual precipitation (USGS 2020). The survey area is not located within a 100-year floodplain. The closest 100-year floodplain is associated with Roan Creek, approximately 12.6 miles southeast of the storage yard boundary (ECMC 2023; Federal Emergency Management Agency 2023). Geologic mapping for this area indicates that the survey area is in the lower part shale, sandstone, marlstone, and limestone known as the Green River Formation (Tweto 1979). According to the NRCS soil surveys for Garfield County, Colorado, none of the soil map units within the survey area have the potential to fulfill the hydric soil criteria (NRCS 2023b). The dominant soil map units present within the survey area are Cumulic Haploborolls, 1 to 3 percent slopes, Grobutte very channery loam, 30 to 60 percent slopes, and Happle very channery sandy loam, 12 to 25 percent slopes; all of these are described as well drained and have recorded depths to groundwater greater than 80 inches (NRCS 2023a) (see Appendix D). The latest NHD and NWI maps indicate that there are three potentially jurisdictional waterbody features within the survey area of the proposed Skinner Ridge Yard Storage (USFWS 2023). The mapped features are southeast (Tom Creek), southwest (Clear Creek), and north of the proposed development. No aquatic resources were mapped or identified within the disturbance boundary of the proposed yard storage. Based on SWCA’s review of available data and observations made at the time of the survey, hydrologic conditions in the vicinity of the survey area are generally representative of typical conditions for this time of year. The recorded rainfall amounts for May to July 2023 are compared with normal rainfall amounts for these months in Table 1. According to data obtained from Weather Underground (2023), in the 3- month period preceding SWCA’s site visit, the survey area received less-than-normal rainfall, with less- than-normal precipitation in all 3 months assessed. Table 1. Monthly Recorded Precipitation at the Grand Junction, Colorado, Weather Station Month Recorded Rainfall (inches) Normal Rainfall (inches) Difference (inches) May 2023 0.04 0.88 0.84 June 2023 0.23 0.46 0.23 July 2023 0.04 0.61 0.57 Total 0.31 1.95 1.64 Sources: U.S. Climate Data (2023); Weather Underground (2023). 3.2 Field Survey Qualified SWCA biologists conducted the on-site field survey on July 21, 2023. SWCA biologists performed formal wetland and waterbody delineations within 500 feet of the proposed oil and gas location on accessible parcels crossed by the proposed development; visual wetland assessments followed by desktop delineations are conducted on parcels not crossed by a project for which Chevron does not have permission for pedestrian access. Aquatic Resources Inventory Report for the Proposed Development of the Skinner Ridge Yard Storage, Garfield County, Colorado 4 3.2.1 Wetlands SWCA identified and delineated approximately 0.42 acre of a wetland within the survey area (Table 2; see Figure A-2). Table 2 lists the size of the delineated wetland feature within the survey area and the distance from the wetland feature to the proposed Skinner Ridge Yard Storage. Table 2. Wetlands Identified within the Survey Area Wetland ID Size within the Survey Area (acres) Distance to Pad (feet) Direction to Pad WL01 0.419 167.02 East 3.2.1.1 FLOODPLAIN WETLAND (WL01) SWCA identified approximately 0.25 acre of emergent scrub/shrub wetland within the survey area (see Figure A-2). WL01 is an emergent scrub/shrub (PEM/PSS) wetland that has formed within the floodplain of Clear Creek (WB02) west of the proposed Skinner Ridge Yard Storage. The portion of WL01 located west and slightly downgradient of the proposed development relies on intermittent-perennial flows of Clear Creek (Figure C-5; see Figure A-2; see Appendix B; see Appendix D). Vegetation: The dominant plant species present within the floodplain wetland is narrow-leaf cottonwood (Populus angustifolia), American-brooklime (Veronica americana), rocky mountain buttercup (Ranunculus macauleyi), and rocky mountain maple (Acer glabrum). Soils: Soils are characterized as sandy gravel in composition, showing indicators for problematic hydric soils. Hydrology: SWCA observed the primary indicator, Inundation Visible on Aerial Imagery (B7), and secondary indicators, Geomorphic Position (D2) and FAC-Neutral Test (D5), associated with wetland hydrology. 3.2.2 Non-wetland Waters SWCA identified and delineated approximately 2.25 acres of non-wetland waterbodies within the survey area (Table 3; see Figure A-2). Table 3 lists the size of each delineated waterbody feature within the survey area and the distance from each feature to the proposed Skinner Ridge Yard Storage. Table 3. Waterbodies Identified within the Survey Area Waterbody ID Size within the Survey Area (acres) Distance to Pad (feet) Direction to Pad WB01 1.027 283.74 South WB02 (Clear Creek) 1.056 71.54 East WB03 0.029 10.98 Northwest WB04 (Tom Creek) 0.133 69.81 Northwest 3.2.2.1 HOLDING POND (WB01) SWCA delineated approximately 1.03 acres of a holding pond containing an OHWM. The results of the field survey confirmed that this holding pond feature exhibited no characteristics typical of a wetland, including no hydrophytic vegetation. The pond feature is likely dry most of the year and relies on water Aquatic Resources Inventory Report for the Proposed Development of the Skinner Ridge Yard Storage, Garfield County, Colorado 5 allocations from the oil and gas facility (Figure C-6 and C-7; see Figure A-2). The waterbody is located slightly upgradient of the proposed Skinner Ridge Yard Storage, approximately 284 feet north of the proposed development. 3.2.2.2 CLEAR CREEK (WB02) SWCA delineated approximately 1.06 acres of a stream feature, Clear Creek, containing an OHWM (Figure C-8 and C-9; see Figure A-2). The stream receives waters primarily from runoff from the snowpack melt. The waterbody is located slightly downgradient of the proposed Skinner Ridge Yard Storage, with the closest segment of the stream feature approximately 72 feet west of the disturbance boundary of the proposed Skinner Ridge Yard Storage. 3.2.2.3 DRAINAGE DITCH (WB03) SWCA delineated approximately 0.03 acre of a drainage ditch containing an OHWM. The ditch is an ephemeral drainage feature that flows generally north to south and crosses the eastern portion of the survey area, continuing south and draining into Tom Creek (WB04) (Figure C-10; see Figure A-2). The ditch receives waters primarily from runoff from the oil and gas access roads and adjacent facility. The waterbody is located slightly upgradient of the proposed Skinner Ridge Yard Storage, with the closest segment of the ditch approximately 11 feet southeast of the proposed development. 3.2.2.4 TOM CREEK (WB04) SWCA delineated approximately 0.13 acre of a stream feature, Tom Creek, containing an OHWM. The stream is an intermittent drainage feature that is a tributary to Clear Creek (WB02) (Figure C-11 and C- 12; see Figure A-2). The stream receives waters primarily from runoff from the snowpack melt. The waterbody is located slightly upgradient of the proposed Skinner Ridge Yard Storage, with the closest segment of the stream feature approximately 70 feet southeast of the disturbance boundary of the proposed Skinner Ridge Yard Storage. 4 SUMMARY AND RECOMMENDATIONS One wetland and four waterbodies, totaling 2.66 acres, were recorded within the proposed Skinner Ridge Yard Storage survey area. Based on NWI and NHD maps, field surveys, and proximity of the proposed development to the nearest aquatic resources, disturbance from construction is not anticipated to impact potentially jurisdictional aquatic resources; therefore, proposed production facility construction is not expected to trigger permitting under Section 404 of the Clean Water Act (U.S. Environmental Protection Agency 2008). ECMC permitting is still expected to include consultation regarding Rule 1202(3) because the proposed Skinner Ridge Yard Storage will likely include chemical storage facilities within 500 feet of an aquatic resource. It is assumed that a variance application will be required. The current process requires operators to submit a variance request through a formal hearings application. Variance applications must demonstrate the following under Rule 502.c: 1) that the operator has made a good faith effort or is unable to comply with the rule; 2) that the requested variance will not violate the basic intent of the Act; 3) that the requested variance is necessary to avoid an undue hardship; 4) that granting the variance will result in no adverse impact to public health, safety, welfare, the environment, or wildlife resources; and 5) that the requested variance contains reasonable mitigation measures to avoid, minimize, or mitigate adverse impacts to public health, safety, welfare, the environment, and wildlife resources. Based on SWCA’s experience, reasonable mitigation measures include an engineering design incorporating protective berms and stormwater management to avoid and minimize risk of potential impacts. Aquatic Resources Inventory Report for the Proposed Development of the Skinner Ridge Yard Storage, Garfield County, Colorado 6 5 LITERATURE CITED Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of Wetlands and Deepwater Habitats of the United States. FWS/OBS-79/31. Washington, D.C.: U.S. Fish and Wildlife Service. Energy & Carbon Management Commission (ECMC). 2023. ECMC Interactive Map. Available at: https://ecmc.state.co.us/maps.html#/gisonline. Accessed July 2023. Federal Emergency Management Agency. 2023. FEMA Flood Map Service Center. Available at: https://msc.fema.gov/portal/home. Accessed July 2023. Google Earth. 2023. Available at: https://www.google.com/earth/. Accessed July 2023. Natural Resources Conservation Service (NRCS). 2023a. Soil Survey of Garfield County Northern Part, Colorado. Available at: http://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx. Accessed July 2023. ———. 2023b. Natural Resources Conservation Service, National Lists of Hydric Soils (December 2015). Available at: http://www.nrcs.usda.gov/wps/portal/nrcs/main/soils/use/hydric/. Accessed July 2023. NETROnline. 2023. Historic Aerials. Historic Aerial Image Database Viewer. Available at: https://www.historicaerials.com/viewer. Accessed July 2023. Tweto, O. 1979. Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000. Available at: https://ngmdb.usgs.gov/Prodesc/proddesc_68589.htm. Accessed July 2023. U.S. Army Corps of Engineers (USACE). 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report Y-87-1. Vicksburg, Mississippi: U.S. Army Engineers Waterways Experiment Station. ———. 2005. Regulatory Guidance Letter No. 05-05, Subject: Ordinary High Water Mark Identification. Signed by Major General Don T. Riley, Director of Civil Works. ———. 2008. A Field Guide to the Identification of the Ordinary High Water Mark (OHWM) in the Arid West Region of the Western United States, edited by R.W. Lichvar and S.M. McColley. ERDC/CRREL TR-08-12. Hanover, New Hampshire: U.S. Army Engineer Research and Development Center. ———. 2010. Regional Supplement to the Corps of Engineers Wetlands Delineation Manual: Great Plains Region (Version 2.0), edited by J.S. Wakeley, R.W. Lichvar, and C.V. Noble. ERDC/EL TR-08-12. Vicksburg, Mississippi: U.S. Army Engineer Research and Development Center. U.S. Climate Data. 2023. Climate Grand Junction – Colorado. Available at: https://www.usclimatedata.com/climate/grand-junction/colorado/united-states/usco0166. Accessed July 2023. U.S. Environmental Protection Agency. 2008. 2008 Rapanos Guidance and Related Documents under CWA Section 404. Available at: https://www.epa.gov/cwa-404/2008-rapanos-guidance-and- related-documents-under-cwa-section-404. Accessed July 2023. Aquatic Resources Inventory Report for the Proposed Development of the Skinner Ridge Yard Storage, Garfield County, Colorado 7 U.S. Fish and Wildlife Service (USFWS). 2023. National Wetlands Inventory. U.S. Fish and Wildlife Service Ecological Services. Available at: http://www.fws.gov/wetlands/Data/State- Downloads.html. Accessed July 2023. U.S. Geological Survey (USGS). 2020. StreamStats Web Tool. Available at: https://streamstats.usgs.gov/ss/. Accessed July 2023. ———. 2023. National Hydrography Dataset. Available at: http://nhd.usgs.gov/index.html. Accessed July 2023. Weather Underground. 2023. Forecast for Grand Junction, CO. Available at: https://www.wunderground.com/history/monthly/us/co/grand-junction/KGJT/date/2023-7. Accessed July 2023. Aquatic Resources Inventory Report for the Proposed Development of the Skinner Ridge Yard Storage, Garfield County, Colorado 8 This page intentionally left blank. APPENDIX A Aquatic Resources Inventory Maps A-1 Figure A-1. Overview of the Skinner Ridge Yard Storage survey area. A-2 Figure A-2. Aerial overview of the Skinner Ridge Yard Storage survey area. APPENDIX B Wetland Determination Data Forms US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0 WETLAND DETERMINATION DATA FORM – Western Mountains, Valleys, and Coast Region Project/Site: City/County: Sampling Date: Applicant/Owner: State: Sampling Point: Investigator(s): Section, Township, Range: Landform (hillslope, terrace, etc.): Local relief (concave, convex, none): Slope (%): Subregion (LRR): Lat: Long: Datum: Soil Map Unit Name: NWI classification: Are climatic / hydrologic conditions on the site typical for this time of year? Yes No (If no, explain in Remarks.) Are Vegetation , Soil , or Hydrology significantly disturbed? Are “Normal Circumstances” present? Yes No Are Vegetation , Soil , or Hydrology naturally problematic? (If needed, explain any answers in Remarks.) SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes No Hydric Soil Present? Yes No Wetland Hydrology Present? Yes No Is the Sampled Area within a Wetland? Yes No Remarks: VEGETATION – Use scientific names of plants. Dominance Test worksheet: Number of Dominant Species That Are OBL, FACW, or FAC: (A) Total Number of Dominant Species Across All Strata: (B) Percent of Dominant Species That Are OBL, FACW, or FAC: (A/B) Prevalence Index worksheet: Total % Cover of: Multiply by: OBL species x 1 = FACW species x 2 = FAC species x 3 = FACU species x 4 = UPL species x 5 = Column Totals: (A) (B) Prevalence Index = B/A = Hydrophytic Vegetation Indicators: 1 - Rapid Test for Hydrophytic Vegetation 2 - Dominance Test is >50% 3 - Prevalence Index is ≤3.01 4 - Morphological Adaptations1 (Provide supporting data in Remarks or on a separate sheet) 5 - Wetland Non-Vascular Plants1 Problematic Hydrophytic Vegetation1 (Explain) 1Indicators of hydric soil and wetland hydrology must be present, unless disturbed or problematic. Absolute Dominant Indicator Tree Stratum (Plot size: ) % Cover Species? Status 1. 2. 3. 4. = Total Cover Sapling/Shrub Stratum (Plot size: ) 1. 2. 3. 4. 5. = Total Cover Herb Stratum (Plot size: ) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. = Total Cover Woody Vine Stratum (Plot size: ) 1. 2. = Total Cover % Bare Ground in Herb Stratum Hydrophytic Vegetation Present? Yes No Remarks: Skinner Ridge Yard Storage Garfield County 7/21/2023 Chevron Rockies Business Unit CO DP01 P. Gordon and C. Westbrook S36, T5S, R98W floodplain concave 1-5 Central Rocky Mountains 39.571189 -108.348337 NAD83 Cumulic Haploborolls, 1 to 3 percent slopes PEM/PSS 44 4 30 ft. Acer glabrum 25 10 35 Yes No FACW FACU Populus angustifolia 3 4 15 ft. 75 None 5 ft. Veronica americana Ranunculus macauleyi 4 30 20 50 Yes Yes OBL FACW 4 30 ft. None 4 50 US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0 SOIL Sampling Point: Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks 1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3: Histosol (A1) Sandy Redox (S5) 2 cm Muck (A10) Histic Epipedon (A2) Stripped Matrix (S6) Red Parent Material (TF2) Black Histic (A3) Loamy Mucky Mineral (F1) (except MLRA 1) Very Shallow Dark Surface (TF12) Hydrogen Sulfide (A4) Loamy Gleyed Matrix (F2) Other (Explain in Remarks) Depleted Below Dark Surface (A11) Depleted Matrix (F3) Thick Dark Surface (A12) Redox Dark Surface (F6) 3Indicators of hydrophytic vegetation and Sandy Mucky Mineral (S1) Depleted Dark Surface (F7) wetland hydrology must be present, Sandy Gleyed Matrix (S4) Redox Depressions (F8) unless disturbed or problematic. Restrictive Layer (if present): Type: Depth (inches): Hydric Soil Present? Yes No Remarks: HYDROLOGY Wetland Hydrology Indicators: Primary Indicators (minimum of one required; check all that apply) Secondary Indicators (2 or more required) Surface Water (A1) Water-Stained Leaves (B9) (except Water-Stained Leaves (B9) (MLRA 1, 2, High Water Table (A2) MLRA 1, 2, 4A, and 4B) 4A, and 4B) Saturation (A3) Salt Crust (B11) Drainage Patterns (B10) Water Marks (B1) Aquatic Invertebrates (B13) Dry-Season Water Table (C2) Sediment Deposits (B2) Hydrogen Sulfide Odor (C1) Saturation Visible on Aerial Imagery (C9) Drift Deposits (B3) Oxidized Rhizospheres along Living Roots (C3) Geomorphic Position (D2) Algal Mat or Crust (B4) Presence of Reduced Iron (C4) Shallow Aquitard (D3) Iron Deposits (B5) Recent Iron Reduction in Tilled Soils (C6) FAC-Neutral Test (D5) Surface Soil Cracks (B6) Stunted or Stressed Plants (D1) (LRR A) Raised Ant Mounds (D6) (LRR A) Inundation Visible on Aerial Imagery (B7) Other (Explain in Remarks) Frost-Heave Hummocks (D7) Sparsely Vegetated Concave Surface (B8) Field Observations: Surface Water Present? Yes No Depth (inches): Water Table Present? Yes No Depth (inches): Saturation Present? Yes No Depth (inches): (includes capillary fringe) Wetland Hydrology Present? Yes No Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: DP01 4 Problematic soils caused by damming and channelization of Clear Creek 4 4 4 4 0 4 0 4 Appendix C Photographs of the Survey Area C-3 Figure C-1. Overview of the proposed Skinner Ridge Yard Storage location; view facing north. Figure C-2. Overview of the proposed Skinner Ridge Yard Storage location; view facing south. C-4 Figure C-3. Overview of the proposed Skinner Ridge Yard Storage location; view facing east. Figure C-4. Overview of the proposed Skinner Ridge Yard Storage location; view facing west. C-5 Figure C-5. Overview of Clear Creek (WB02) and the associated floodplain wetland (WL01); view facing south. Figure C-6. Overview of the holding pond (WB01); view facing northeast. C-6 Figure C-7. Overview of the holding pond (WB01); view facing northwest. Figure C-8. Overview of Clear Creek (WB02); view facing north. C-7 Figure C-9. Overview of Clear Creek (WB02); view facing south. Figure C-10. Overview of the drainage ditch feature (WB03); view facing southwest. C-8 Figure C-11. Overview of Tom Creek (WB04); view facing north. Figure C-12. Overview of Tom Creek (WB04); view facing south. APPENDIX D Natural Resources Conservation Service Soil Report for the Survey Area Hydric Rating by Map Unit—Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties (Skinner Ridge Yard Storage Survey Area) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 7/31/2023 Page 1 of 5 43 8 3 1 3 0 43 8 3 2 2 0 43 8 3 3 1 0 43 8 3 4 0 0 43 8 3 4 9 0 43 8 3 5 8 0 43 8 3 6 7 0 43 8 3 7 6 0 43 8 3 1 3 0 43 8 3 2 2 0 43 8 3 3 1 0 43 8 3 4 0 0 43 8 3 4 9 0 43 8 3 5 8 0 43 8 3 6 7 0 43 8 3 7 6 0 727650 727740 727830 727920 728010 728100 727650 727740 727830 727920 728010 728100 39° 34' 25'' N 10 8 ° 2 1 ' 1 ' ' W 39° 34' 25'' N 10 8 ° 2 0 ' 3 8 ' ' W 39° 34' 1'' N 10 8 ° 2 1 ' 1 ' ' W 39° 34' 1'' N 10 8 ° 2 0 ' 3 8 ' ' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 12N WGS84 0 150 300 600 900Feet 0 50 100 200 300Meters Map Scale: 1:3,490 if printed on A portrait (8.5" x 11") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Rating Polygons Hydric (100%) Hydric (66 to 99%) Hydric (33 to 65%) Hydric (1 to 32%) Not Hydric (0%) Not rated or not available Soil Rating Lines Hydric (100%) Hydric (66 to 99%) Hydric (33 to 65%) Hydric (1 to 32%) Not Hydric (0%) Not rated or not available Soil Rating Points Hydric (100%) Hydric (66 to 99%) Hydric (33 to 65%) Hydric (1 to 32%) Not Hydric (0%) Not rated or not available Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties Survey Area Data: Version 15, Sep 6, 2022 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 24, 2020—Jul 8, 2020 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Hydric Rating by Map Unit—Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties (Skinner Ridge Yard Storage Survey Area) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 7/31/2023 Page 2 of 5 Hydric Rating by Map Unit Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 28 Cumulic Haploborolls, 1 to 3 percent slopes 0 13.8 30.8% 42 Grobutte very channery loam, 30 to 60 percent slopes 0 3.9 8.8% 45 Happle very channery sandy loam, 12 to 25 percent slopes 0 26.9 60.4% Totals for Area of Interest 44.6 100.0% Hydric Rating by Map Unit—Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties Skinner Ridge Yard Storage Survey Area Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 7/31/2023 Page 3 of 5 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: 213732100008 DATE: 6/23/2023 PROJECT: Chevron Storage Yard OWNERS: Chevron USA, INC CONTACT/REPRESENTATIVE: Doug Dennison ENGINEER/SURVEYOR/OTHER: if different from above PRACTICAL LOCATION: North of De Beque along CR 211 TYPE OF APPLICATION: Administrative Review ZONING: Resource Lands COMPREHENSIVE PLAN: Residential Medium High, Resource Lands I. GENERAL PROJECT DESCRIPTION Full copy of the Land Use and Development Code can be found here: https://www.garfield- county.com/community-development/ The applicant wants to replace the current storage yard with a new one approximately 2.5 miles further up CR 211. The area along CR 211 is essentially a canyon along Clear Creek. The public access portion of the CR ends within the applicant’s property, and they have maintenance agreements with Garfield County Road and Bridge regarding this road. The current pad is going to be repurposed and re-permitted as an Oil and Gas Location. A sketch site plan was provided by the applicant and included on the next page. With Resource Land Zone District, storage yards (which include laydown yards) are considered an Administrative Review Land Use Change permit. A list of submittal requirements is included below. Waiver of Submittal requirements should address the review criteria of 4-202. The site plan should show all necessary setbacks, including waterbodies. The applicant mentioned a helipad north of the proposed lot. Typically, helistops require Major Impact Review Land Use Change Permits. Information related to this use should be provided to staff prior to the application being submitted. 2 The application will need to explain the access agreement with Road and Bridge. Steps should be taken to protect natural features near the storage yard. Notice will have to be mailed to all property owners within 200 feet of the parcel boundaries. The mineral rights owners of the property will receive mailed notice also. II. COMPREHENSIVE PLAN There are several comprehensive plan future land use designations on the parcel. III. REGULATORY PROVISIONS APPLICANT IS REQUIRED TO ADDRESS The following Sections of the Garfield Land Use and Development Code as amended apply to the Application: • Section 4-103 Administrative Review and Section 4-101 Common Review Procedures • Table 4-201 Submission Requirements and Section 4-203 Description of Submittal Requirements. • Section 4-118 and Section 4-202, as applicable. • Article 7 Standards , as applicable 3 IV. SUBMITTAL REQUIREMENTS As a convenience outlined below is a list of information typically required for this type of application. Table 4-201 outlines the specific application submittal criteria. The following list can function as a checklist for your submittal. General Application Materials including the Application Form (signed), payment of Fees and signed Payment Agreement Form (see attached). o A narrative describing the request and related information. o Proof of ownership. o A Statement of Authority is required if the property is owned by an LLC or similar entity. o A Letter of Authorization is required if an owner intends to have a representative complete the Application and processing. o Names and mailing addresses of property owners within 200 ft. of the subject property from Assessor’s Office Records. o Mineral rights ownership for the subject property including mailing address and/or statement on mineral rights research (see attached). o Copy of the Preapplication Summary needs to be submitted with the Application. Vicinity Map. Site Plan. Grading and Drainage Plan. Landscape Plan. Impact Analysis. Development agreement, if applicable. Improvement agreement, if applicable. Traffic Study. Water Supply/Distribution Plan. Wastewater Management/Treatment Plan. Affordable Housing Plan, if applicable. The Application should demonstrate compliance with Article 7 Standards, as applicable. he Application should include a waiver request from submittal requirements according to 4- 202, specifically addressing the review criteria for each waiver request. The Application should include any waivers from Article 7 Standards that the applicant wishes to pursue, in accordance with 4-118. Three hard copies and one digital copy (on a USB drive, for example) of the application are required. Both versions should be split into individual sections. Community Development Staff is available to meet with the Applicant to provide additional information and clarification on any of the submittal requirements and waiver requests. 4 V. REVIEW PROCESS Call-Up for review by the Board in accordance with the procedures and review process contained in Section 4-112. Staff will review the application for completeness, and when complete, refer it to appropriate agencies for technical review. Staff will create a report to be submitted to the Director for their decision. Public Hearing(s): X No Public Hearing, Directors Decision (with notice per code) Planning Commission Board of County Commissioners Board of Adjustment 5 Referral Agencies: May include but is not limited to: Garfield County Surveyor, Garfield County Attorney, Garfield County Building Department, Garfield Road and Bridge, Garfield County Consulting Engineer, Homeowners Association, Fire District . VI. APPLICATION REVIEW FEES Planning Review Fees: $250 Referral Agency Fees: $na Total Deposit: $250(additional hours are billed at hourly rate of $40.50) VII. GENERAL APPLICATION PROCESSING The foregoing summary is advisory in nature only and is not binding on the County. The summary 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 update 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: 6/23/2023 Philip Berry, Planner III Date 6 7 8 85 South 200 East Vernal, Utah 84078 o: 435.789.1017. x: 435.789.1813 www.uintahgroup.com UTAH | COLORADO | WYOMING | NORTH DAKOTA | MONTANA | KANSAS | OKLAHOMA | TEXAS | NEW MEXICO January 10, 2024 Garfield County Community Development Planning Division Attn: Philip Berry 108 8th Street, Suite 401 Glenwood Springs, CO 81601 Re: Response to “Not Technically Complete Letter (GAPA 11-23-8990) Administrative Review Land Use Change Permit Chevron U.S.A. Inc. – Skinner Ridge Laydown Yard Sec. 36, T5S, R98W, 6th PM AIN: 2137-321-00-0008 Dear Mr. Berry, The intent of this letter is to provide a Response to the “Not Technically Complete Letter (GAPA 11-23-8990) received for the Skinner Ridge Laydown Yard, dated December 13, 2023. Below are the comments that were received with the associated response to those comments from Chevron U.S.A. LLC and Uintah Engineering & Land Surveying (UELS). 1. A recorded Statement of Authority designating Gina Lee as an authorized agent for Chevron is required. A recorded Statement of Authority designated Ryan Antonio as an authorized agent for Chevron has been included in the resubmittal documents. 2. A list of all property owners of record within 100 feet of the parcel’s boundaries are required. A list of all property owners of record within 100 feet of the parcel’s boundaries has been prepared and included as Table 1 in Section II. Application Submittal Requirements – 3. Adjacent Property Landowners. 3. A complete Mineral Owner Research Memo identifying the mineral rights owners is required. A complete Mineral Owner Research Memo has been prepared and completed by Mr. Ryan Antonio and is included in the resubmittal documents. 4. The file “0. Chevron - Skinner Ridge Laydown Yard - Standards Docs - Rev 11-15-23” will not open. Please resubmit a digital copy of this file to staff via email or similar method. An updated electronic file of “0. Chevron – Skinner Ridge Laydown Yard – Standards Docs – Rev 01-08-2024” is included in the resubmittal documents. 5. Please provide an Impact Analysis that addresses the topics in Section 4.203.G. This may be included in the application’s narrative and refer to other sections of the application instead of repeating information. The Impacts Analysis topics are outlined in Section II – Application Submittal Requirements – F. Section 4-203.G.: Impacts Analysis of the “0. Chevron – Skinner Ridge Laydown Yard – Standards Docs – Rev 01-08-2024” document, and associated Appendices include: 85 South 200 East Vernal, Utah 84078 o: 435.789.1017. x: 435.789.1813 www.uintahgroup.com UTAH | COLORADO | WYOMING | NORTH DAKOTA | MONTANA | KANSAS | OKLAHOMA | TEXAS | NEW MEXICO • Appendix F.1 – Impact Analysis: Soils Report • Appendix F.2 – Impact Analysis: Natural Resources Report • Appendix F.3 – Impact Analysis: Aquatic Resources Inventory Report Chevron has included requests for waivers for the following Impacts Analysis, and further waiver request information is included in Section I. Introduction and Narrative – E. Section 4-202 Waiver Submission of Requirements: • Impacts Analysis – Geology & Hazards (4.203.G.4) • Impacts Analysis – Groundwater & Aquifer Recharge Area (4.203.G.5) 6. The application should provide a Traffic Study, Water Supply Distribution Plan, and Wastewater Management/Treatment Plan or waiver requests from these requirements. Chevron has included requests for waivers for the following Article & Standards, and further waiver request information is included in Section I. Introduction and Narrative – E. Section 4-202: Waiver Submission of Requirements of the “0. Chevron – Skinner Ridge Laydown Yard – Standards Docs – Rev 01-08-2024” document: • Development Agreement (4.203.J) • Improvements Agreement (4.203.K) • Traffic Study (4.203.l) • Water Supply & Distribution Plan (4.203.M) • Wastewater Management/Treatment Plan (4.203.N) 7. The application’s narrative mentions requesting a change to the Future Land Use Map Designation. That would need to be a separate application and the applicant should reach out to schedule a preapplication conference if they want to move ahead with that update. The narrative has been revised to exclude the request for a change to the Future Land Use Map Designation. Through communication with Community Development Staff, Chevron will not be requesting this change as part of this Land Use Change Application. Enclosed in this submittal, please find electronic files for the following updated documents: This concludes the response to the “Not Technically Complete Letter” received for the Skinner Ridge Laydown Yard, dated December 13, 2013. If you have any concerns or comments regarding these comments or the accompanying documents, please call me at (435) 789-1017. Sincerely, Amy Doebele Director of Permitting Services UELS, LLC 85 S 200 E Vernal, UT 84078 o. (435) 789-1017 d. (435) 247-1401 adoebele@uintahgroup.com enclosures AD/ad