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Home My WebLink About20211149.tiffThornton Water Project Weld County Use by Special Review for Pipeline — Domestic Water Second Supplemental Permit Application — Appendixes Volume 2 of a C�_Thornton WATER PROJECT Submitted to: Weld County Department of Planning Services 1555 N. 17th Avenue Greeley, CO 80631 Dated: February 11, 2021 Prepared By: CH2M HILL 9191 South Jamaica Street CH2M'HILL Englewood, Co 80112 idefr Prepared For: City of Thornton of Thornton 950o Civic Center Drive`�. CityThornton, CO 80229 lY� Thornton Water Project --Weld County USR Second Supplemental Permit Application Table of Contents Thornton Water Project Weld County Use by Special Review for Pipeline - Domestic Water Second Supplemental Permit Application, Volume 1 of 4 Cover Letter Cover Table of Contents ii Acronyms and Abbreviations xi IntroductionI-1 Purpose and Need P-1 USR Procedural Guide Checklist USR Procedural Guide Checklist . PG -1 Section 1 Application Form ....,.....1-1 Section 2 Authorization Form, If Applicable 2-1 Section 3 Incorporation or Trust Document 3-1 Section 4 USR Questionnaire 4-1 Section 5 List of Property Owners 5-1 Section 6 Irrigation Ditch, Lateral, or Pipeline Owners 6-1 Section 7 Mineral Owners Agreement, If Applicable 7-1 Section 8 Recent Deed 8-1 Section 9 Certificate of Conveyances Form 9-1 Section 10 Statement of Taxes 10-1 Section 11 USR Map 11-1 Section 12 Notice of Inquiry, If Applicable 12-1 Section 13 Pre -application Meeting Minutes 13-1 Section 14 Evidence of Adequate Water Supply 14-1 Section 1 Evidence of Adequate Sewage Disposal 15-1 Section 16 Drainage 16-1 *Drainage Narrative Thornton Water Project Water Pipeline Exceptions to Stormwater Detention WP -1 *Preliminary Drainage Report Thornton Water Project Pump Station 1 SitePS1-1 *Preliminary Drainage Report Thornton Water Project Pump Station 2 Site PS2-1 Section 17 Traffic Narrative 17-1 Section 18 Sign Plan, If Applicable.., 18-1 Section 19 Nuisance Abatement Plan, If Applicable19-1 Section 20 Landscape and Screening Plan, If Applicable 20-1 Section 21 Decommissioning Plan, If Applicable 21-1 Section 22 Draft Emergency Incident Action Plan, If Applicable 22-1 TVVP USR SUPPLEMENT 2 TABLE OF CONTENTS ii *DRAFT Thornton Water Project Emergency Incident Action Plan For Weld County 1 Section 23 Noise Study, If Applicable 23-1 *Wave Engineering Noise Study 23-2 Section 24 Soils Report 24-1 Section 25 Community Meeting (Optional) 25-1 Section 26 Application Fee 26-1 Section 27 Investigation Fee 27-1 Procedural Guide 2021 Procedural Guide 2021 ... Planning Requirement Checklist Public Works Requirement Checklist Environmental Health Requirement Checklist Planning Questionnaire Public Works Questionnaire Environmental Health Questionnaire WCC Section 23-2-510 PG2021-1 PG2021-1 ...... , PG 2021-3 PG2021-3 PG 2021-4 PG2021-6 PG 2021-8 Section A Applicant's Name and Telephone Number A-1 Section B Address of the Applicant B-1 Section C Summary Statement of the Project C-1 C.1 Source, capacity, size destination and type of facilities, support STRUCTURES, lines, etc., involvedC-1 C.2 A detailed report shall be submitted which includes information on the following Items. C-1 C.2.a A description of the PIPELINE — DOMESTIC WATER C-1 C.2.b A description of the preferred route or location of the PIPELINE — DOMESTIC WATER and reasons for its selection C-9 C.2.c Procedures to be employed in mitigating any adverse impacts of the proposed routes or sites. C-16 C.2.d An outline of the planned construction, including startup and commissioning schedule, to include the number of stages and timing of eachC-27 C.2.e Information of any public meeting conducted, to include the location, date, time, attendance and method of advertising. C-36 C.2.f A description of the hazards, if any, of fire, explosion and other dangers to the health, safety and welfare of employees and the general PUBLIC. C-38 C.2.g A description of emergency procedures to be followed in case of a reported failure or accident involving the proposed PIPELINE — DOMESTIC WATER. Such outline shall include actions, if any, required of PUBLIC officials, including fire and police officials, and the names and telephone numbers of appropriate Company officials to notify in an accident or failure should occurC-41 C.2.h A description of the method or procedures to be employed to avoid or minimize the impacts on irrigated agricultural landC-42 C.2.i A discussion of how the proposal conforms with the guidelines of Chapter 22 of this code and any other applicable code provision or ordinance in effectC-43 C.2.j A Decommissioning Plan C-85 C.2.k A traffic narrative describing construction traffic and permanent or temporary access points. C-85 TWP USR SUPPLEMENT 2 TABLE OF CONTENTS iii References C.2.I A description of any haul routes to be used during construction, identifying roads and bridges involved and the weight of the loads. C-86 C.2.m Soils Reports Required for Pipeline Crossings or Any Pipeline Encroaching in Public Right -of - Way, if Required by the Department of Public Works C-89 Section D A Certified List of Names, Addresses and the Corresponding Parcel Identification Numbers Assigned by the County Assessor of Owner of Surface Properties Located Within One Hundred Fifty (150) Feet of the Pipeline — Domestic Water D-1 Section E The Names and Addresses of Any Owner, Operator, or User of Any Irrigation Ditch, Lateral, or Pipeline that Traverses the Property E-1 Section F The Application Fee F-1 WCC Sections 23-2-480 and 23-2-490 Section G WCC Approval Standards and Application Requirements.G-1 WCC Approval Standard ....,.G-1 WCC Sections 23-2-480 A.1 and WCC 23-2-490 A All reasonable efforts have been made to avoid irrigated cropland or to minimize the negative impacts on agricultural USES and lands G-1 WCC Sections 23-2-480 A.2 and 23-2-490 B The PIPELINE - DOMESTIC WATER will not have an undue adverse effect on existing and future DEVELOPMENT of the surrounding area, as set forth in applicable MASTER PLANSG-2 WCC Sections 23-2-480 A.3 and 23-2-490 C The design of the proposed PIPELINE - DOMESTIC WATER mitigates negative impacts on the surrounding area to the greatest extent feasible G-10 WCC Sections 23-2-480 A.4 and 23-2-490 D The site shall be maintained in such a manner so as to control soil erosion, dust and the growth of NOXIOUS WEEDS G-12 WCC Sections 23-2-480 A.5 and 23-2-490 E The applicant has agreed to implement any reasonable measures deemed necessary by the Board of County Commissioners to ensure that the health, safety and welfare of the inhabitants of the COUNTY will be protected, and to mitigate or minimize any potential adverse impacts from the proposed PIPELINE - DOMESTIC WATER. G-14 WCC Sections 23-2-480 A.6 and 23-2-490 F All reasonable alternatives to the proposal have been adequately assessed, and the proposed action is consistent with the best interests of the people of the COUNTY and represents a balanced use of resources in the affected area ............. G-19 WCC Sections 23-2-480 A.7 and 23-2-490 G The nature and location or expansion of the PIPELINE — DOMESTIC WATER will not unreasonably interfere with any significant wildlife habitat and will not unreasonably affect any endangered wildlife species, unique natural resource, known historic landmark or archaeological site within the affected areaG-25 WCC Sections 23-2-480 A.8 and 23-2-490 H No adverse impact from stormwater runoff to the PUBLIC RIGHTS -OF -WAY and/or surrounding properties as a result of the PIPELINE - DOMESTIC WATER.G-26 WCC Application Requirements G-27 Approval Standards and Requirements Cross -Reference G-28 R-1 TWP USR SUPPLEMENT 2 TABLE OF CONTENTS iv Thornton Water Project Weld County Use by Special Review for Pipeline - Domestic Water Second Supplemental Permit Application - Appendixes, Volume 2 of 4 Cover Table of Contents ii *Appendixes Appendix A Natural and Cultural Resources Assessment Revised Natural and Cultural Resources Assessment, Thornton Water Project — Weld County Permit Areas, Weld County, Colorado Appendix B Stakeholder Outreach Information Appendix C Best Management Practices Appendix D Soils Reports Appendix E Community Outreach Information Appendix F Alternatives Analysis Technical Report Thornton Water Project, Reach 2 Alternative Corridors Analysis Appendix G ROW Feasibility Analysis Technical Memorandum TWP Feasibility of Alternatively Locating TWP Water Pipeline within Weld County Right -of -Way Thornton Water Project Weld County Use by Special Review for Pipeline - Domestic Water Second Supplemental Permit Application - USR18-0130 Permit Maps, Volume 3 of 3 USR18-0130 Permit Maps Thornton Water Project Weld County Use by Special Review for Pipeline - Domestic Water Second Supplemental Permit Application , Drainage Narrative Water Tank Exception to Stormwater Detention, Volume 4 of 4 * Drainage Narrative Thornton Water Project Water Tank Exception to Stormwater Detention Volume 1 Figures** Figure 4.1a Figure 4.1b Figure 4.2 Figure 4.3 Figure 4.4 Figure 4.5 Figure 4.6 Figure 4.7 Figure 4.8 TWP Location Map 4-2 TWP Location Map 4-3 Example Buried Appurtenances 4-5 Example Appurtenance: Water Tank 4-6 Water Tank Preliminary Layout 4-6 Pump Station 1 Preliminary Layout 4-8 Pump Station 2 Preliminary Layout 4-9 Construction Activities 4-14 TWP Timeline 4-16 TWP USR SUPPLEMENT 2 TABLE OF CONTENTS Nl Figure 4.9a Figure 4.9b Figure 4.10a Figure 4.10b Figure 4.11a Figure 4.11b Figure 4.12a Figure 4.12b Figure 4.13a Figure 4.13b Figure 5.1 Figure 5.2 Figure 5.3 Figure 5.4 Figure 5.5 Figure 5.6 Figure 5.7 Figure 5.8 Figure 5.9 Figure 5.10 Figure 5.11 Figure 5.12 Figure 5.13 Figure 5.14 Figure 5.15 Figure 5.16 Figure 5.17 Figure 5.18 Figure 5.19 Figure 5.20 Figure 5.21 Figure 5.22 Figure 5.23 Figure 5.24 Figure 5.25 Geologic Hazards 4-30 Geologic Hazards 4-31 Floodplains ,...4-33 Floodplains 4-34 Potential Staging Locations 4-41 Potential Staging Locations Possible Haul Routes 4-42 4-52 4-53 4-56 4-57 5-20 5-21 5-22 5-23 5-24 5-25 5-26 5-27 5-28 5-29 5-30 5-31 5-32 5-33 5-34 5-35 5-36 5-37 5-38 5-39 5-40 5-41 5-42 5-43 5-44 Possible Haul Routes, Possible TWP Access Locations Possible TWP Access Locations Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area .. Adjacent Property Owner Notification Area . Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area ... Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area . Adjacent Property Owner Notification Area ... Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area Adjacent Property Owner Notification Area.., Adjacent Property Owner Notification Area TWP USR SUPPLEMENT 2 TABLE OF CONTENTS vi Figure 5.26 Adjacent Property Owner Notification Area 5-45 Figure 5.27 Adjacent Property Owner Notification Area 5-46 Figure 17.1a TWP Location Map 17-2 Figure 17.1b TWP Location Map 17-3 Figure 17.2a Railroad Crossings 17-9 Figure 17.2b Railroad Crossings 17-10 Figure 17.3a Possible TWP Access Locations 17-14 Figure 17.3a Possible TWP Access Locations 17-15 Figure 17.4a Possible Haul Routes 17-17 Figure 17.4b Possible Haul Routes 17-18 Figure 17.5 Sample Road Closure Types - (A) Road Closure with Diversion, (B) Partial Road Closure with Flaggers, (C) Road Closure with Diversion 17-21 Figure 24.1a Soils 24-3 Figure 24.1b Soils ......24-4 Figure 24.2a Geologic Hazards 24-5 Figure 24.2b Geologic Hazards 24-6 Figure C.2.a.1a TWP Location Map C-2 Figure C.2.a.lb TWP Location Map C-3 Figure C.2.a.2 Example Buried Appurtenances , C-4 Figure C.2.a.3 Example Appurtenance: Water Tank C-5 Figure C.2.a.4 Water Tank Preliminary Layout ....,C-5 Figure C.2.a.5 Pump Station 1 Preliminary Layout C-7 Figure C.2.a.6 Pump Station 2 Preliminary Layout C-8 Figure C.2.c.la Floodplains ,....... C-18 Figure C.2.c.lb Floodplains C-19 Figure C.2.c.2a Soil Erodibility C-23 Figure C.2.c..2b Soil Erodibility C-24 Figure C.2.c.3 South Platte River Basin and Associated Alluvial Aquifers C-26 Figure C.2.d.1 TWP Timeline for Weld County C-28 Figure C.2.d.2 Construction Activities C-29 Figure C.2.d.3a Potential Staging Locations C-31 Figure C.2.d.3b Potential Staging Locations C-32 Figure C.2.d.4 Example Open -Cut Construction SectionC-33 Figure C.2.ia Zoning C-48 Figure C.2.ib Zoning C-49 Figure C.2.la Possible Haul Routes C-87 TWP USR SUPPLEMENT 2 TABLE OF CONTENTS vii Figure C.2.Ib Possible Haul Routes Volume 1 Tables*** Table I Table 4.1 Table 4.2 Table 4.3 Table 4.4 Table 4.5 Table 4.6 Table 5.1 Table 5.2 Table 6.1 Table 6.2 Table 17.1 Table 17.2 Table 17.3 Table 17.4 Table 17.5 Table 17.6 Table 24.1 Table C.2,c Table C.2.d Table C.2.f Table C.2.i Table C.2.l Table G..1 Table 6.2 Table G..3 Table G.4 C-88 Summary of Minor Water Pipeline Alignment Adjustments 1-3 Anticipated Water Pipeline Construction and Restoration Times for Open -cut Method for Road Crossings 4-26 Anticipated Water Pipeline Construction and Restoration Times for Open -cut Method for Road Crossings Anticipated Construction Vehicles Anticipated Construction Vehicles Possible Construction Delivery and Commuting Routes Possible Post -construction Delivery and Commuting Routes 4-39 4-47 4-49 4-49 4-51 List of Surrounding Property Owners within Weld County within 150 feet of the Centerline of the TWP 5-3 List of Surrounding Property Owners within Larimer County within 150 feet of the Centerline of the TWP 5-18 List of Owners of Irrigation Ditches or Laterals Traversing the TWP Easements or Appurtenant Facility Sites 6-1 List of Owners of Pipelines Traversing the TWP Easements or Appurtenant Facility Sites ....6-4 Roadway Classifications and AADT 17-4 TWP Railroad Crossings 17-8 Anticipated Construction Vehicles ......, 17-12 Possible Haul, Delivery, and Commuting Routes 17-16 Structurally Deficient Bridges Near the TWP 17-19 Structures Posted for Load Restrictions Near the TWP 17-19 Summary of Very Limited Rating from the TWP NRCS Soil Reports 24-1 Impacted Existing Condition Reference to Mitigation Measures Location Supplement 2 .. C-16 Probable Water Pipeline Construction Method at Defined Existing FeaturesC-34 Anticipated Water Pipeline Construction and Restoration Times for Open -cut Method for Road Crossings C-41 Anticipated Water Pipeline Construction and Restoration Times for Open -cut Method for Road Crossing ....... C-75 Possible Haul, Delivery, and Commuting Routes C-86 Anticipated Water Pipeline Construction and Restoration Times for Open -cut Method for Road Crossings 6-9 Impacted Existing Condition Reference to Mitigation Measures Location in Supplement 2 ..G- 11 Impacted Existing Condition Reference to Mitigation Measures Location Supplement 2 .. 6-18 WCC Standards and Application Requirements Cross Reference Guide 6-29 TWP USR SUPPLEMENT 2 TABLE OF CONTENTS viii Volume 1 Exhibits**** Exhibit PG.1a Exhibit PG.lb Exhibit PG.1c Exhibit PG.1d Exhibit PG.2 Exhibit PG.3 Exhibit PG -4a Exhibit PG -4b Exhibit 12.1 Exhibit 12.2 Exhibit 12.3 Exhibit 12..4a Exhibit 12.4b Exhibit 12.5 Exhibit 12.6 Exhibit 12.7 Exhibit 12.8a Exhibit 12.8b Exhibit 12.9a Exhibit 12.9b Exhibit 12.10a Exhibit 12.10b Exhibit 12.11a Exhibit 12.11b Exhibit 12.12a Exhibit 12.12b Exhibit 12.13a Exhibit 12.13b Exhibit 12.14a Exhibit 12.14b Exhibit 12.15a Exhibit 12.15b Exhibit 12.16a Exhibit 12.16b February 6, 2020 Telephone Conversation (page 1 of 4) PG -2 February 6, 2020 Telephone Conversation (page 2 of 4) PG -3 February 6, 2020 Telephone Conversation (page 3 of 4) PG -4 February 6, 2020 Telephone Conversation (page 4 of 4) PG -5 February 6, 2020 Telephone Conversation E-mail Transmittal PG -6 February 6, 2020 Telephone Conversation E-mail Confirmation from Weld County PG -6 USR Procedural Guide (page 1 of 2) PG -7 USR Procedural Guide (page 1 of 2) PG -8 Berthoud Response to Weld County Planning 12-2 Firestone Signed Notice of Inquiry 12-3 Frederick Signed Notice of Inquiry 12-4 Mead Signed Notice of Inquiry 12-S Mead Response to Notice of Inquiry 12-6 Milliken Signed Notice of Inquiry 12-7 Platteville Signed Notice of Inquiry 12-8 Severance Signed Notice of Inquiry 12-9 Windsor Response to Notice of Inquiry Request (page 1 of 2) 12-10 Windsor Response to Notice of Inquiry Request (page 1 of 2) 12-11 Notice of Inquiry Email Request to Berthoud .....12-12 Notice of Inquiry Email Request Attachment to Berthoud ...........12-13 Notice of Inquiry Email Request to Dacono 12-14 Notice of Inquiry Email Request Attachment to Dacono 12-15 Notice of Inquiry Email Request to Firestone 12-16 Notice of Inquiry Email Request Attachment to Firestone 12-17 Notice of Inquiry Email Request to Fort Lupton 12-18 Notice of Inquiry Email Request Attachment to Fort Lupton 12-19 Notice of Inquiry Email Request to Frederick 12-20 Notice of Inquiry Email Request Attachment to Frederick 12-21 Notice of Inquiry Email Request to Johnstown .12-22 Notice of Inquiry Email Request Attachment to Johnstown ...12-23 Notice of Inquiry Email Request to Mead ,12-24 Notice of Inquiry Email Request Attachment to Mead 12-25 Notice of Inquiry Email Request to Milliken .......12-26 Notice of Inquiry Email Request Attachment to Milliken 12-27 TWP USR SUPPLEMENT 2 TABLE OF CONTENTS ix Exhibit 12.17a Exhibit 12.17b Exhibit 12.18a Exhibit 12.18b Exhibit 12.19a Exhibit 12.19b Exhibit 12.20a Exhibit 12.20b Exhibit 12.21 Notice of Inquiry Email Request to Platteville 12-28 Notice of Inquiry► Email Request Attachment to Platteville 12-29 Notice of Inquiry Email Request to Severance12-30 Notice of Inquiry Email Request Attachment to Severance 12-31 Notice of Inquiry Email Request to Timnath ....12-32 Notice of Inquiry Email Request Attachment to Timnath ..,12-33 Notice of Inquiry Email Request to Windsor 12-34 Notice of Inquiry Email Request Attachment to Windsor..12-35 Notice of Inquiry Email Request Attachment for All Requests .12-36 *Note: Attached report. **Note: Figures included in attached reports* are not included in table of contents list. ***Note: Tables included in attached reports* are not included in table of contents list. ****Note: Exhibits included in attached reports* are not included in table of contents list. TWP USR SUPPLEMENT 2 TABLE OF CONTENTS x Appendix A Natural and Cultural Resources Assessment ERA Consultants in Natural Resources and the Environment Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Prepared for City of Thornton 12450 Washington Street Thornton, Colorado 80241 Prepared by ERO Resources Corporation 1842 Clarkson Street Denver, Colorado 80218 (303) 830-1188 ERO Project #5241 January 26, 2021 Denver • Durango • Hotchkiss • Idaho www.eroresources.com Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Contents Overview of the Proposed Project .1 Project Corridor Description 2 Environmental Impact Analysis 2 Open Waters, Wetlands, and Riparian Areas 2 Description 2 Open Waters, Wetlands, and Riparian Impacts 6 Terrestrial and Aquatic Animals and Habitat 6 Federal Threatened, Endangered, and Candidate Animal Species 7 State Animal Species of Concern 9 Raptors and Other Migratory Birds 23 Big Game 'Large Mammals 26 Other Game and Nongame Species 28 Aquatic Species and Habitat 29 Terrestrial and Aquatic Plant Life 29 Vegetation Communities 29 Federal Threatened, Endangered, and Candidate Plant Species 31 Rare and Sensitive Plant Species 33 Areas of Historic or Archaeological Importance 34 Description 34 Impacts 35 Monitoring and Mitigation Plan 35 Open Waters, Wetlands, and Riparian Areas 35 Terrestrial and Aquatic Animals and Habitat 36 Terrestrial and Aquatic Plant Life 36 Noxious Weed Management 37 Areas of Historic or Archaeological Importance 37 References 38 Tables Table 1. Federally threatened, endangered, and candidate wildlife species potentially found in Weld County or potentially affected by projects in Weld County. .... 7 Table 2. State animal species of concern potentially found in the TWP study buffer or with potential to be affected by the TWP..10 Table 3. Raptor nest locations in or near the TWP study buffer. 24 Table 4. Total acreages of vegetation communities in the TWP study buffer and work limits31 Table S. Federally threatened and endangered plant species potentially found in Weld County or potentially affected by projects in Weld County31 Table 6. Areas in the TWP study buffer with potential habitat for ULTO33 Table 7. Plant species considered rare or imperiled by the CNHP that potentially occur in the TWP study buffer 33 ERO Project #5241 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Figures Figure 1. Vicinity Map Figure 2. Map Index Figures 3.01-3.66. Vegetation Communities. Figure 4. Special Status Wildlife Overview Figures 5.01-5.66. Wildlife Figure 6. General Wildlife Overview Figure 7. Mule Deer and White -Tailed Deer Overview Figures 8.01-8.17. OAHP File Search Results Appendices Appendix A Photo Log Appendix B Summary of Water Features in the TWP Study Buffer and Work Limits Appendix C Cultural Resources in the TWP Study Buffer Appendix D Figures ERO Project #5241 ii ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project Weld County Permit Areas Weld County, Colorado January 26, 2021 Overview of the Proposed Project The city of Thornton (Thornton) retained ERO Resources Corporation (ERO) to provide a natural and cultural resources assessment to assist Thornton's planning for the Thornton Water Project (TWP), a proposed domestic water transmission pipeline project in Weld County, Colorado. This revised report is intended to support the major land use permits Thornton is seeking from Weld County and to aid in the future development of the final alignment for the water pipeline by detailing the natural and cultural resources found along the proposed work limits of the TWP alignment in Weld County. Within Weld County, the TWP begins northeast of Fort Collins at the Larimer/Weld County Line, east of the intersection of Weld County Road 13 and Weld County Road 92 and extends south to the Adams County line at Weld County Road 2 (Figure 1). ERO assessed a stud► buffer along the TWP alignment, which is an average of 0.20 mile wide and approximately 48 miles long in Weld County. The study buffer was developed to typically include 500 feet either side of the permanent and temporary construction easements for the water pipeline and 500 feet surrounding the water tank and pump station sites within Weld County. The typical permanent easement width is 50 feet wide, and the typical temporary construction easement is an additional 40 -feet in width. Work limits is defined as the area where construction activities are anticipated to occur and include the permanent and temporary construction easements and any Weld County approved right-of-way (ROW). ERO conducted surveys in the TWP study buffer in May and July in 2016, in August/ September, and December in 2017, in January 2018, in April 2019, and in March, July, and November 2020 (2016 through 2020 site visits) adjacent to public roads, on Thornton -owned property, or where access had been granted, and assessed natural resources via aerial imagery for areas that were inaccessible. For this revised report, the TWP study buffer is limited to the areas within Weld County. ERO also conducted a Class I File Search and Literature Review for cultural resources for the TWP study buffer. This revised report provides information on existing site conditions, including natural and cultural resources in the TWP study buffer, anticipated impacts from the TWP, and a list of monitoring and mitigation measures to minimize or eliminate potential impacts. This revised report includes an environmental impact analysis and a monitoring and mitigation plan for the following four resources: (1) open waters, wetlands, and riparian areas; (2) terrestrial and aquatic animals and habitat; (3) terrestrial and aquatic plant life; and (4) areas of historic or archaeological importance. Thornton is proposing to use trenchless construction methods to cross jurisdictional waters of the U.S. and suitable habitat for federally threatened and endangered species. Based on this approach, it is anticipated that the TWP would not require any federal approvals such as a Clean Water Act 404 permit ERO Project #5241 1 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado or consultation under the Endangered Species Act (ESA). Thornton has been in discussions with the U.S. Army Corps of Engineers (Corps) and has been submitting requests for approved jurisdictional determinations to the Corps to determine which areas in the TWP study buffer are jurisdictional. Project Corridor Description The TWP study buffer and work limits are in Weld County, Colorado (Figure 1). TWP begins northeast of Fort Collins at the Larimer/Weld County Line, east of the intersection of Weld County Road 13 and Weld County Road 92, and extends south to the Adams County line at Weld County Road 2. Most of the TWP study buffer is located along municipal and county roads and contains upland vegetation (Appendix A, Photo 1). Sections of the TWP study buffer occur within undeveloped grasslands, agricultural fields, and housing subdivisions and along ponds, reservoirs, and wetlands. Environmental Impact Analysis Open Waters, Wetlands, and Riparian Areas Description The information on waters and wetlands presented in this revised report focuses on waters and wetlands subject to the Corps' jurisdiction under Section 404 of the Clean Water Act. These waters and wetlands are referred to as "jurisdictional," "waters of the U.S.," "potential waters of the U.S.," or "potential wetlands" in this revised report. ERO is conducting ongoing jurisdictional wetland delineations to refine the boundaries of the wetlands and open water identified in this revised report. An approved jurisdictional determination from the Corps is needed to clarify each feature's jurisdictional status. Thornton previously submitted four approved jurisdictional determination requests for several features identified in Weld County (NWO- 2018-00759-DEN, NWo-2019-00835-DEN, and NWo-2019-02108-DEN; Corps 2018, 2019a, 2019b, 2020) and is currently coordinating with the Corps on a fifth approved jurisdictional determination for the TWP (December 2020 jurisdictional request). On April 21, 2020, the Environmental Protection Agency (EPA) and Corps published the "Navigable Waters Protection Rule" in the FR. The final rule became effective on June 22, 2020 in 49 states and in all U.S. territories. A preliminary injunction has been granted for Colorado. As such, this report and the 2020 jurisdictional request have been prepared following the 2008 Rapanos guidelines for defining waters of the U.S. If regulations change that could affect any feature identified in the 2020 jurisdictional request, Thornton will coordinate with the Corps to discuss reevaluating the feature under new regulations. Based on the 2016 through 2020 site visits/ ERO mapped broad vegetation communities within the TWP study buffer, including the general boundaries of potential isolated wetlands, jurisdictional wetlands, and other waters of the U.S. Prior to the site visits, ERO reviewed National Wetland Inventory mapping and the U.S. Geological Survey National Hydrography Dataset (NHD) within the TWP study buffer, as ERO Project #5241 2 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado well as aerial photographs and Google Earth imagery, to identify mapped streams and areas of open water that could indicate wetlands or waters of the U.S. The determination on whether a wetland or open water area is a potential water of the U.S. was based on reviewing NHD mapping to determine if the area has a possible connection to any known waters of the U.S. ERO mapped 40 wetlands and 67 potential waters of the U.S. (44 open water areas and 23 ditches and canals) in the TWP study buffer. About 64.05 acres of potential wetlands and 101.06 acres of potential other waters of the U.S. (91.63 acres of open water areas and 9.43 acres of ditches and canals) were mapped inside the TWP study buffer in unincorporated Weld County. About 13.83 acres of potential wetlands and 12.14 acres of potential other waters of the U.S. (8.30 acres of open water areas and 3.84 acres of ditches and canals) were mapped inside the TWP study buffer in incorporated areas of Weld County. Inside the work limits in unincorporated Weld County, about 6.76 acres of potential wetlands and 2.11 acres of potential other waters of the U.S. (1.58 acres of open water areas and 0.53 acre of ditches and canals) were mapped. About 0.32 acre of potential wetlands and 0.29 acre of potential other waters of the U.S. (0.12 acre of open water areas and 0.17 acre of ditches and canals) were mapped inside the work limits in incorporated areas of Weld County. Below are descriptions of the potential waters of the U.S. found in the TWP study buffer. The general boundaries of the wetlands and waters with the potential to be jurisdictional are shown on Figures 3.01-3.66. Acreages shown on the figures represent total area within the TWP study buffer. Appendix B provides a summary of wetland and water features, including potential waters of the U.S., identified during the 2016 through 2020 site visits, with general descriptions, proximity to traditional navigable waters (TNWs), locations, acreages in the TWP study buffer and work limits, and determined jurisdictional statuses. Information on proximity is important in determining the jurisdictional status of a water or wetland. The Corps currently considers TNWs and tributaries to TNWs that are relatively permanent waters (RPWs) to be jurisdictional, as well as wetlands that connect to TNWs or are adjacent to RPWs. Waters and wetlands that lack a surface hydrologic connection to a TNW or RPW are typically considered isolated and nonjurisdictional. Perennial Streams Big Dry Creek Big Dry Creek runs from southwest to northeast across the TWP study buffer (Figures 3.02 and 3.03). Big Dry Creek appears on the NHD as a perennial stream and runs through the corridor just north of Weld County Road 4. Big Dry Creek ranges from 4 to 15 feet wide and has wetland fringes. The wetlands were dominated by redtop (Agrostis gigantea). Other vegetation observed included reed canarygrass (Phalaris arundinacea), spiny cocklebur (Xanthium sprnosum), prairie cordgrass (Sparirna pectinata), barnyardgrass (Echinochloa crus-galli), common spikerush (Eleocharis palustris), annual rabbitsfoot grass (Polypogon monspeliensis), Torrey's rush (Juncos torreyi), corn speedwell (Veronica arvensis), and dotted smartweed (Polygonum punctatum). Big Dry Creek is a tributary to the South ERO Project #5241 3 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Platte River, a TNW (Appendix A, Photo 2). Due to its perennial flow and connection to a TNW, Big Dry Creek is considered a jurisdictional water of the U.S. by the Corps. Little Dry Creek Little Dry Creek is a perennial stream flowing from southwest to northeast through the TWP study buffer (Figures 3.07 and 3.08). ERO did not have access to Little Dry Creek during their site visits to this area in 2016. Based on aerial imagery, Little Dry Creek may contain abutting wetlands in the TWP study buffer. Little Dry Creek flows northeast to the South Platte River, a TNW. Due to its perennial flow and connection to the South Platte River, Little Dry Creek is considered a jurisdictional water of the U.S. by the Corps. St. Vrain Creek St. Vrain Creek flows south to north through the TWP study buffer at Highway 66 (Figures 3.20 and 3.21). St. Vrain Creek is a perennial stream with a 120- to 200 -foot -wide channel through the corridor. St. Vrain Creek has an eventual connection to the South Platte River, a TNW. St. Vrain Creek has previously been determined a jurisdictional water of the U.S. Wetlands occur along the east bank of the creek. The wetlands are dominated by switchgrass (Panicum virgaturn) and sandbar willow (Salix exigua). North of Highway 66, the west bank of the creek is incised and does not contain any wetland vegetation. Little Thompson River The Little Thompson River is a perennial stream flowing from west to east through the TWP study buffer (Figures 3.32 and 3.33). The Little Thompson River is about 13 feet wide with 4 -foot -wide wetland fringes on either side of the river within the TWP study buffer (Appendix A, Photo 3). The Little Thompson River is a tributary to the South Platte River, a TNW. Due to its perennial flow and connection to a TNW, the Little Thompson River is considered a jurisdictional water of the U.S. by the Corps. Big Thompson River The Big Thompson River is a perennial stream flowing from west to east through the TWP study buffer (Figure 3.40). The Big Thompson River is about 18 to 22 feet wide in the TWP study buffer and is a tributary to the South Platte River, a TNW. Wetlands dominated by sandbar willow, broadleaf cattail (Typha iatifoira), and reed canarygrass occur along the banks of the Big Thompson River in the TWP study buffer. Due to its perennial flow and connection to a TNW, the Big Thompson River is considered a jurisdictional water of the U.S. by the Corps. Cache la Poudre River (Poudre River) The Poudre River is a perennial stream flowing from northwest to southeast through the TWP study buffer (Figure 3.49). The Poudre River ranges from 25 to 90 feet wide in the TWP study buffer and is a tributary to the South Platte River, a TNW. Wetlands dominated by sandbar willow occur along the banks of the Poudre River in the TWP study buffer. Due to its perennial flow and connection to a TNW, the Poudre River is considered a jurisdictional water of the U.S. by the Corps. ERO Project #5241 4 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas ►+'eld County, Colorado Intermittent Streams Four unnamed intermittent streams enter the TWP study buffer at several locations, including Unnamed Drainage 1, Unnamed Drainage 2, Unnamed Drainage 3, and Unnamed Drainage 7 (Figures 3.01, 3.29, 3.36, 3.37, 3.38, and 3.39). Unnamed Drainage 1 is bordered by wetlands (W20) consisting of broadleaf cattails and Baltic rush (Juncus balticus) and flows into Hillsboro Ditch, which was previous determined to be nonjurisdictional (Corps 2019). A wetland vegetated swale (W64) occurs immediately south of Weld County Road 42 and has a downstream connection to Unnamed Drainage 1 (Figure 3.29). Based on observations during the 2017 field surveys, Unnamed Drainage 2 did not contain an ordinary high water mark or bed and bank and was mostly vegetated with upland species, with small patches of wetlands (Figure 3.01). Unnamed Drainage 3 is an intermittent drainage with a potential connection to Big Thompson River northeast of the study buffer. Unnamed Drainage 3 consists of a wetland vegetated swale (W87) within the work limits and TWP study buffer (Figure 3.38). Unnamed Drainage 3 may also have a connection to W86, which appears to be an artificially constructed wetland areas between Unnamed Ponds 72, 73, and 74 (Figure 3.39). Unnamed Drainage 7 is an intermittent drainage with abutting wetlands (W18) that connects to an unnamed intermittent drainage ditch, which flows into the Big Thompson River northeast of the TWP study buffer (Figures 3.36 and 3.37). The known jurisdictional status and potential connections of the intermittent and ephemeral drainages to known waters of the U.S. are discussed in Appendix B. Canals and Ditches Approximately 23 ditches and canals are located in the TWP study buffer, of which 22 have been determined nonjurisdictional by the Corps (N1 O -2019 -02108 -DEN; Appendix B). Home Supply Ditch is located in the TWP study buffer and has not yet received an approved jurisdictional determination from the Corps to clarify its jurisdictional status (Figure 3.35). The canals and ditches generally range from 2 to 15 feet wide in the TWP study buffer, and the banks typically consist of bare dirt, riprap, or concrete. Potential wetland fringes or patches occur along several of the canals and ditches, and wetland vegetation in these areas typically consists of broadleaf cattail and reed canarygrass. The Corps considers canals and ditches that convey water from a water of the U.S. to a water of the U.S., or that intercept a water of the U.S., jurisdictional. The approved jurisdictional status and potential connections of the canals and ditches to any known waters of the U.S. are discussed in Appendix B. Roadside Swales Several roadside swales with wetland vegetation are located in the TWP study buffer (Figures 3.01- 3.66). The wetland vegetation consists primarily of intermittent patches of broadleaf cattail. The Corps typically does not consider roadside ditches and swales jurisdictional due to isolation from known waters of the U.S. Reservoirs and Ponds Four reservoirs, consisting of German Reservoir No. 12 (Figure 3.02), Diamond Reservoir (Figures 3.23 and 3.24), Koenig Reservoir (Figure 3.42), and Oklahoma Reservoir (Figure 3.45), occur in the TWP study buffer. Additionally, 29 unnamed ponds occur in the TWP study buffer. Wetland fringes abut or occur ERO Project #5241 5 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado along German Reservoir No. 12 (W38), Diamond Reservoir (W23), Oklahoma Reservoir (W15), and several of the unnamed ponds (Appendix A, Photo 4). Wetland vegetation in these areas consists primarily of broadleaf cattail, Nebraska sedge (Carex nebrascensis), and Baltic rush. The Corps typically does not consider artificial lakes or ponds created by excavating and/or diking dry land to collect and retain water, and which are used exclusively for purposes such as stock watering, irrigation, settling basins, or rice growing, jurisdictional. However, several of the unnamed ponds are part of an intermittent drainage system, some of which have downstream connections to other waters of the U.S. The jurisdictional status and potential connections of the ponds, lakes, and reservoirs to any known waters of the U.S. are discussed in Appendix B. Wetlands ERO mapped 40 potential wetlands in the TWP study buffer (Figures 3.01-3.66). Wetlands occur along several of the water features identified above, and vegetation in the wetlands largely consists of broadleaf cattail, Baltic rush, and reed canarygrass. More details on wetland vegetation are provided in the Vegetation Communities section of this revised report and the known jurisdictional status and potential connections of wetlands to any known waters of the U.S. are discussed in Appendix B. Open Waters, Wetlands, and Riparian Impacts The proposed water pipeline would cross several open waters, wetlands, and riparian areas; however, construction of the TWP has been designed to minimize impacts on wetlands and waters by avoiding the discharge of dredged or fill material into jurisdictional waters and wetlands. Any jurisdictional open waters or wetlands would be crossed using trenchless construction methods. Thornton has met with the Corps to discuss the proposed approach of avoiding impacts on jurisdictional open waters or wetlands. Open waters and wetlands determined to be nonjurisdictional and any riparian areas would be temporarily impacted by open -cut trenching activities. During construction, the trench would be as narrow as safely practicable when crossing nonjurisdictional waters and wetlands or any riparian areas. All temporary impacts would be returned to preproject conditions after completion of the proposed activities. Best management practices (BMPs) would be implemented during construction, which would help minimize or eliminate impacts on the TWP study buffer. These BMPs include installing temporary fencing to deter access to sensitive areas outside the TWP study buffer limits, placing staging areas in previously disturbed upland areas, and installing sediment- and erosion -control devices to minimize surface runoff in disturbed areas. All temporarily disturbed areas would be returned to preconstruction grades, planted with native seed mixes or as reasonably specified by the property owner, and mulched. Terrestrial and Aquatic Animals and Habitat Information on terrestrial and aquatic animals was obtained from various sources including Colorado Parks and Wildlife (CPW), CPW All Species Activity Mapping data, the Colorado Natural Heritage Program (CNHP), the U.S. Fish and Wildlife Service (Service), published literature, and field surveys. ERO visited the TWP study buffer, where accessible, to assess potential wildlife habitat during the 2016 ERO Project #5241 6 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado through 2020 site visits. The following sections discuss species likely to occur in the TWP study buffer and the potential effects of the TWP. Federal Threatened, Endangered, and CandidateAnimal Species ERO assessed the TWP study buffer for potential habitat for federally threatened, endangered, and candidate species protected under the ESA. The Service lists several threatened and endangered species with potential habitat in Weld County, or with the potential to be affected by projects in Weld County (Table 1). Only species with potentially suitable habitat in the TWP study buffer and species affected by water depletions from the South Platte River are discussed in more detail below. Table 1. Federally threatened, endangered, and candidate wildlife species potentially found in Weld County or potentially affected by projects in Weld County. Common Name Scientific Name Status* County Habitat Suitable Habitat Present Mammals Black ferret** -footed Mustela nigripes FE, SE Weld Grasslands support plains, western mountain prairie valleys or shrublands dogs; parks, of Colorado that eastern and No experimental TWP buffer not any study does contain populations —the jumping Preble's meadow mouse Zapus hudson/us preblei FT, ST Weld Shrub riparian/wet meadows Yes Birds Eastern black rail Lateral/us jamaicensis FE Weld Shallow sedge in southeastern cattail meadows wetlands with Colorado dense and wet cover No Interior tern** least Sterna antillarum athalassos FE, SE Weld Sandy/pebble reservoirs, and beaches rivers on lakes, No Mexican owl spotted Strix occidentalis FT, ST Weld Closed canyons -canopy forests in steep No Piping plover** Charadr/us melodus FT, ST Weld Sandy sandbars lakeshore beaches and river No Whooping crane** Grus americana FE, SE Weld Mudflats agricultural around reservoirs and areas in No Fish Pallid sturgeon*** Scaphirhynchus albus FE — Large, with sandy turbid, a strong substrate free -flowing current and rivers gravel or No *FE = Federally Endangered Species; FT = Federally Threatened Species; SE = State Endangered Species; ST = State Threatened Species. **The black -footed ferret is listed as federally endangered throughout most of its range; however, the project area is located in a block clearance zone (Service 2009). As of 2019, CPW has released ferrets at six different sites in Baca, Denver, Larimer, Prowers, and Pueblo Counties (CPW 2021a); none of these sites occur in or near the TWP study buffer. 'Water depletions in the South Platte River may affect the species and/or critical habitat in downstream reaches in other counties or states. Source: Service 2021. ERO Project #5241 7 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Preble's Meadow Jumping Mouse Species Background Preble's meadow jumping mouse (Zapus hudsonius preblei) (Preble's) was listed as a threatened species on May 13, 1998, under the ESA (Federal Register Vol. 63, No. 232:66777-66784, December 3, 1998). Under existing regulations, either a habitat assessment or a full presence/absence survey for Preble's is required for any habitat -disturbing activity in areas determined to be potential Preble's habitat (generally stream and riparian habitats along the Colorado Front Range and in southeastern Wyoming). Typically, Preble's occurs below 7,600 feet in elevation, generally in lowlands with medium to high moisture along permanent or intermittent streams and canals (Meaney et al. 1997). Preble's occurs in low undergrowth consisting of grasses and forbs, in open wet meadows, in riparian corridors near forests, or where tall shrubs and low trees provide adequate cover (Service 1999; Meaney et al. 1997). Preble's typically inhabits areas characterized by well -developed plains riparian vegetation with relatively undisturbed grassland and a water source nearby (Service 2014). Potential Habitat ERO reviewed the TWP study buffer for potential Preble's habitat. None of the drainages that occur in the TWP study buffer have been identified by the Service as areas essential to the recovery of Preble's (75 Federal Register 78429). Preble's is known to occur in two drainages that cross the TWP study buffer: the Little Thompson River and the Big Thompson River (Figure 4). Preble's has been captured twice along the Little Thompson River 0.48 river mile downstream and 1.38 river miles downstream from the point where the TWP study buffer crosses the Little Thompson River (ERO 2002a, 2002b). Field reviews indicate that this portion of the Little Thompson River provides potentially suitable Preble's habitat in the riparian corridor along the drainage. As such, this area should be considered potentially occupied habitat unless cleared by a presence/absence trapping survey. Preble's has also been captured along the Big Thompson River 4.16 river miles upstream from the point where the TWP study buffer crosses the Big Thompson River (Peterson 2001). Field reviews indicate that the section of the Big Thompson River where the TWP study buffer crosses provides low -quality Preble's habitat, with limited shrub cover and heavy human disturbance present. All other potential wetlands, riparian habitat, and ditches found in Weld County would also be considered potential Preble's habitat; however, these areas are not suitable habitat or are unlikely to support a population of Preble's because they (1) are largely dominated by cattail, (2) are isolated from known Preble's populations, (3) are within areas previously surveyed or assessed for Preble's habitat with no Preble's or Preble's habitat found (Figures 5.01-5.66), or (4) do not contain adequate shrub cover to be considered suitable habitat. This includes St. Vrain Creek and the Poudre River (Appendix A, Photo 5) where suitable habitat is present but previous surveys and evaluations in or adjacent to the TWP study buffer have not found Preble's or Preble's habitat. Impacts No impacts on Preble's or its habitat are anticipated to occur from the TWP. Although wetland and riparian habitat along the Little Thompson River and Big Thompson River in the TWP study buffer provides potentially suitable Preble's habitat, these drainages and the adjacent wetland and riparian ERO Project #5241 8 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado habitat would be crossed by using trenchless construction methods. Using trenchless construction methods in areas with suitable Preble's habitat would eliminate impacts on Preble's habitat. A site assessment has been completed along the Little Thompson River and the Big Thompson River to determine the boundaries of potential or suitable habitat for Preble's to confirm that construction would not occur in those areas. A habitat assessment was submitted to the Service for the crossing at the Little Thompson River, and the Service confirmed that the project would have no effect on Preble's. A habitat assessment will be submitted to the Service when the final alignment has been determined at the Big Thompson River to confirm the boundaries of potential habitat identified within the alignment and to confirm that the TWP would have no effect on Preble's or its habitat. Platte River Species Species Background The least tern (Sterna antillarum), piping plover (Charadrius melodus), whooping crane (Grus americana), and pallid sturgeon (Scaphirhynchus albus) are species that rely heavily on habitat provided by the South Platte River system. The least tern, piping plover, and whooping crane may migrate through Colorado or may occasionally nest on wide, sandy shores of reservoirs, typically in eastern Colorado.. The TWP study buffer consists primarily of semiarid grassland and residential/commercial development habitat that is unsuitable for these species. Pallid sturgeon is a fish found in the Missouri and middle Mississippi Rivers. Potential Habitat Suitable habitat for the least tern, piping plover, whooping crane, and pallid sturgeon is not found in the TWP study buffer. Impacts The Service has determined that federal actions that cause new depletions or that would allow historic depletions to continue to the South Platte River system adversely affect the least tern, piping plover, whooping crane, and pallid sturgeon and their habitats. The continued diversion of the water to be conveyed by the TWP would be considered a historic depletion to the South Platte River system. However, consultation on effects on South Platte River species is required only when a federal action is required. Because no federal action is anticipated, consultation on these species is not required. It should be noted, however, that Thornton is a member of the South Platte Water Related Activities Program (SPWRAP). SPWRAP serves as the vehicle by which Colorado water users participate in the South Platte River Recovery Implementation Program in central Nebraska and obtain regulatory benefits provided by that program. State Animal Species of Concern ERO assessed the TWP study buffer for potential habitat for Colorado threatened and endangered species and species of special concern, as well as species that have been described as rare, vulnerable, or imperiled in the state by the CNHP. The TWP study buffer contains suitable or potentially suitable habitat for several state -listed and sensitive wildlife species (Table 2; Figures 4, 5.01-5.66, and 6), which are described in more detail below. ERO Project #5241 9 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Table 2. State animal species of concern potentially found in the TWP study buffer or with potential to be affected by the TWP. Common Name Scientific Name State Status' CNHP Rank2 Habitat Suitable Habitat Present Amphibians and Reptiles Common snake garter Thamnophis sirtalis SC G5, 53 Limited South tributaries, Platte to the floodplain River and in Colorado of the its Yes South TWP —tributaries Platte study to the River in the buffer Northern frog leopard Rana pipiens SC G5, S3 floodplains; Wetlands, stock with sandy ponds, streams, wet typically soils meadows, beaver clear ponds, and streams Unlikely presence study buffer —no recent the TWP along Mammals Black -tailed prairie dog Cynomys ludovicianus SC G4, S3 Shortgrass prairie Yes colonies TWP —active observed study prairie buffer dog in the River otter Lontra canadensis ST GS, S3/4 Riparian high -quality, water habitat; dependent permanent on bodies of Yes crosses along River the TWP known Cache study species la Poudre buffer range —the Birds American pelican white Pelecanus erythrorliychos — G5, Si Along rivers, estuaries, sometimes lakes, bays, inshore reservoirs, marshes, marine and habitats Yes TWP —suitable study buffer habitat in the Bald eagle Haliaeetus leucocephalus SC GS, S1/3 in towns Typically and Front source open upland lakes; Range, water, (prairie nests in trees near along the Colorado may occasionally trees with a nearby dogs); forages at times in prairie rivers nest food in dog Yes habitat buffer; potential the —suitable in winter TWP foraging study the nesting TWP roosts buffer study and areas in Black -necked stilt Himantopus mexicanus — GS, S3 flooded lagoons Shallow wetlands; lowlands, salt or shallow ponds, Yes TWP —suitable study buffer habitat in the Burrowing owl Athene cunicularia ST G4, S4 Shortgrass colonies prairie with prairie dog located Yes buffer —prairie in the dog TWP burrows study Chestnut -collared longspur Calcarius ornatus — G5, Si Shortgrass open vegetation prairie with sparse, Potentially— collared forage buffer; habitat in no longspur the may study breeding chestnut- TWP suitable Ferruginous hawk Buteo regalis SC G4, S3/4 Shortgrass prairie Yes may TWP winter study in Weld along buffer the County, entire —nests Greater chicken prairie Tympanuchus cupido pinnatus — G4, S3 Mid-tallgrass with open, rolling and tallgrass areas topography Unlikely presence study buffer —no recent the TWP along Long -billed curlew Numenius americanus SC GS, 52 Shortgrass prairie near water Potentially breed in Weld —known to County ERO Project #5241 10 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Common Name Scientific Name Stat Status' CNHP Rank2 Habitat Suitable Habitat Present Mountain plover Charadrius montanus SC G3, 52 including Open, shortgrass than with fields, flat tablelands 6 inches 30 percent grazed and prairie high; bare prairie vegetation grasslands, dog and less breeds in ground, fallow towns areas Unlikely habitat buffer; vulnerable vehicle —very the to TWP human little are suitable study and in plovers disturbance Peregrine falcon Falco peregrinus anatum • SC G4, 52 Open breed or partially on cliffs and wooded habitats; rock outcrops Potentially falcons TWP suitable study may breeding —peregrine in no habitat the forage buffer; White-faced ibis Plegadis chihi — GS, S2 Marshes, rivers swamps, ponds, and ibis Potentially may study breeding forage buffer; —white-faced no in the suitable TWP habitat Fish Brassy minnow Hybognathus hankinsoni ST GS, 53 Grassland ponds; pools substrate cooler, with streams with flowing sand and and gravel aquatic small waters vegetation or in Potentially St. drain River, and to occur Poudre Platte River —known Creek, South Common shiner Luxilus cornutus ST G5, S2 Cool, gradient, shady clear areas streams with gravelly bottoms, moderate and in Potentially cool transitional streams River Basin in —known South to zone Platte occur the Iowa darter Etheostoma exile SC G5, 53 Cool, organic vegetation water; clear waters substrate, that also in over with extends ponds and sand side over lakes or bank in Potentially Thompson Poudre St. Frain River —known to Big and occur Creek, River, Stonecat ►Noturus flavus SC G5, Si Fast streams often water under riffles with rocks sand and -gravel and runs debris of bottoms, in Potentially St. Frain Longmont to occur near —known Creek Suckermouth minnow Phenacohius mirabilis SE GS, S2 Gravel of to clear and rubble to turbid medium rivers riffles creeks and and runs small Potentially in St. drain —known to occur Creek Insects Plains stonefly Mesocapnia frisoni — GS, S1 Low -elevation Southern Rocky streams near the Mountains in Potentially the Little —known to occur River Thompson 15E = State Endangered Species; ST =State Threatened Species; SC = State Species of Concern. 2CNHP Ranking: G1 = Critically imperiled globally, G2 = Imperiled globally, G3= Vulnerable throughout its range, G4 = Apparently secure globally, GS = Demonstrably secure globally, S1 = Critically imperiled in state, 52 = Imperiled in state, 53 = Vulnerable in state, S4 = Apparently secure in state. Sources: Colorado Division of Wildlife (CROW) 2006; CNHP 2021; CPW 2020a, 2020c, 2021a, 2021b; Service 2021; Woodling 1985. Common Garter Snake Species Background The common garter snake (Thamnophis sirtalis) occurs only within the South Platte River drainage below 6,000 feet in northeastern Colorado (Hammerson 1999) and is listed as a state species of concern (CPW 2021b). This snake is restricted to aquatic and riparian habitats in fioodplains and inhabits marshes, ponds, irrigation ditches, and stream edges in Colorado. ERO Project #5241 11 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas ►+'eld County, Colorado Potential Habitat No common garter snakes were seen during the 2016 through 2020 site visits. However, the entire TWP study buffer occurs within the species' overall range (CPW 2021a; Figure 4), and the common garter snake is known to occur in riparian habitat in the drainages of Big Dry Creek, St. Vrain Creek, the Big Thompson River, the South Platte River/ and the Poudre River (Hammerson 1999). Other perennial streams and ponds in the TWP study buffer provide potential habitat for this species, and this species would be expected to occur in suitable habitat. Impacts Impacts from the TWP construction activities on wetlands, open water, or floodplains of the South Platte River tributaries could adversely affect the common garter snake and temporarily disturb suitable habitat. The trenchless construction methods proposed to eliminate impacts on wetlands and waters would minimize long-term adverse impacts on the common garter snake and its habitat; therefore, the TWP would not adversely affect the overall population of common garter snake. Northern Leopard Frog Species Background The northern leopard frog (►Rana pipiens) is a state species of concern (CPW 2021b) that prefers the banks and shallow portions of marshes, wet meadows, ponds, lakes, and streams, particularly where rooted aquatic vegetation is present (Hammerson 1999). The northern leopard frog prefers permanent water bodies and is a wide-ranging species known to elevations of up to 11,000 feet. Northern leopard frogs can range up to 3 miles and feed on insects, spiders, and worms. Northern leopard frog tadpoles are herbivorous scavengers (U.S. Forest Service [USFSI 1997). Worldwide and locally in Colorado, amphibian populations have declined for reasons not well known. Potential Habitat No northern leopard frogs were observed during the 2016 through 2020 site visits and no recent presence of the northern leopard frog is documented in the TWP study buffer (CPW 2020a); however, suitable habitat typically exists along the drainages and open water areas. Impacts The proposed TWP would not likely directly affect the northern leopard frog and using trenchless construction methods under wetlands and waters with potentially suitable habitat would minimize or eliminate long-term adverse impacts on the northern leopard frog. Black -Tailed Prairie Dog► Species Background The black -tailed prairie dog (Cynomys ludovicianus) is listed as a state species of concern (CPW 2021b). Black -tailed prairie dogs are important components of the short and mesic grasslands systems. They are commonly considered a keystone species because their activities (burrowing and intense grazing) provide food and shelter for many other grassland species and have a large effect on community structure and ecosystem function (Power et al. 1996). Prairie dogs help provide habitat for other ERO Project #5241 12 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas ►+'eld County, Colorado species by creating an environment that is inviting to other animals. Species such as burrowing owl (Athene cunicularia), prairie rattlesnake (Crotalus viridis), and mountain plover (Charadrius montanus) are closely linked to prairie dog burrow systems for food and/or cover. Prairie dogs provide an important prey resource for numerous mammalian predators including the American badger (Taxidea Maxus), coyote (Canis latrans), and red fox (Vulpes vulpes), as well as bald eagle (h►aliaeetus leucocephalus), golden eagle (Aquila chrysaetos), ferruginous hawk (Buteo regalis), and other raptors. Prairie dogs can contribute to overall landscape heterogeneity, affect nutrient cycling, and provide nest sites and shelter for wildlife (Whicker and Detling 1988). Prairie dogs also can denude the surface by clipping aboveground vegetation and contributing to exposed bare ground by digging up roots (Kuford 1958; Smith 1967). Typically, areas occupied by prairie dogs have greater cover and abundance of perennial grasses and annual forbs compared with nonoccupied sites (Whicker and Detling 1988; Witmer et al. 2002). Potential Habitat During the 2016 through 2020 site visits, ERO observed active black -tailed prairie dog burrows dispersed throughout the TWP study buffer (Appendix A, Photo 6). Additional prairie dog habitat was seen via aerial imaging, but without access to properties, it was not possible to determine the extent of the colonies. All observed and potential (based on aerial imaging) prairie dog colonies are shown on Figures 5.01, 5.04-5.08, 5.10-5.13, 5.17, 5.18, 5.23-5.25, 5.31, 5.48-5.50, 5.55, 5.62, 5.65, and 5.66. Impacts The construction limits of disturbance would be narrowed as feasible through prairie dog towns to minimize disturbance; however, construction of the TWP would temporarily affect a small portion of the prairie dog colonies in the TWP study buffer. If needed, Thornton could use passive dispersal before and during construction. If feasible, passive dispersal would be initiated before the pupping season (March and April). Several standard agricultural practices, such as irrigation, tilling the soil, and planting tall crops that limit visibility, discourage prairie dogs from occupying a site. This passive dispersal protocol is a nonlethal land management activity designed to encourage prairie dogs to relocate to areas outside of the disturbance footprint and thus prevent any direct impact or mortality from construction activities. The passive dispersal plan is a multistep approach that is designed to begin low-level earth -disturbing activities within the construction footprint to encourage prairie dogs to relocate on their own volition. Heavy construction activities would then be conducted in a second phase after prairie dogs have moved out of the construction zones. Burrowing owls seasonally inhabit prairie dog colonies, and prairie dog control efforts need to consider potential effects on burrowing owls (see Burrowing Owl). River Otter Species Background The river otter (Contra canadensis) is a state threatened species that inhabits riparian habitats that traverse ecosystems ranging from semidesert shrublands to montane and subalpine forests (Armstrong ERO Project #5241 13 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado et al. 2011). Otters usually live in bank dens abandoned by beavers. They are most active at dawn and dusk and feed on aquatic animals like crayfish, frogs, fish, muskrats, and beavers (CPW 2021b). In Colorado, historical records of river otters are nearly statewide, except for the southeastern part of the state. Efforts to restore otters to Colorado began in the late 1970s. Transplants were made to the Colorado, Gunnison, Piedra, and Dolores Rivers, as well as Cheesman Reservoir (Armstrong et al. 2011). Surveys suggest that reintroduced otters survived and breeding populations have been established along several rivers and reservoirs in Colorado: the Colorado River, the Piedra-San Juan River complex, the Dolores -San Miguel River drainages, and the Gunnison River (CDOW 2003). In addition, sightings have been reported from various state waters, including the Poudre and South Platte Rivers (CDOW 2003; CPW 2015). Potential Habitat The TWP study buffer crosses the Poudre River, which is included in the otter's overall Colorado range (CPW 2015, 2020a). Impacts Reported sightings of otters in the Poudre River, St. Frain Creek, and Big Thompson River have been increasing; however, no confirmed observations have been made in Weld County (CPW 2021b). Construction of the TWP could temporarily displace otters; however/ using trenchless construction methods under the Poudre River and other streams with suitable habitat would minimize or eliminate impacts on river otters and their habitat. American White Pelican Species Background The American white pelican (Pelecanus erythrorhychos) is currently considered a critically imperiled species in Colorado (CNHP 2021). White pelicans occur along rivers, lakes/ reservoirs/ estuaries, bays, marshes, and sometimes inshore marine habitats. Pelicans are long-distance migrants that winter along the Gulf Coast of Texas and Mexico (Johnsgard 1993). This species breeds from northern California, west to Colorado and north to Montana, the northern prairie states, and northern Alberta Canada (NatureServe 2021). In Colorado, white pelicans breeds on islands on large water bodies and may travel up to 30 miles to forage (Colorado Breeding Bird Atlas II [COBRA II] 2016). The pelican is an abundant summer resident on the eastern plains and rare on the western valley and mountain parks (CPW 2021b). This species currently nests on three lakes in Colorado (Riverside Reservoir in Weld County, MacFarlane Reservoir in Jackson County, and Antero Reservoir in Park County) (COBRA II 2016). The lake closest to the TWP study buffer is Riverside Reservoir, which is located over 30 miles to the east. Nesting season in Colorado occurs between late March and early May. Potential Habitat Suitable habitat exists for the American white pelican in the TWP study buffer. Although ERO did not observe this species in the TWP study buffer during the 2016 through 2020 site visits, white pelicans may forage in the TWP study buffer. ERO Project #5241 14 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Impacts Temporary disturbance and displacement could occur during construction activities; however, the proposed TWP would not adversely affect the American white pelican over the long term. Bald Eagle Species Background Although the Service removed the bald eagle (Haliaeetus leucocephalus) from the list of threatened and endangered species in July 2007 (due to population recovery), it continues to be federally protected under the Migratory Bird Treaty Act (MBTA) and the Bald and Golden Eagle Protection Act (BGEPA). In addition, the bald eagle is listed as a state species of concern (CPW 2021b). Bald eagles are primarily winter residents in Colorado, although nesting along the Colorado Front Range has increased in recent years. Typical bald eagle nesting habitat consists of forests or wooded areas that contain tall, aged, dying, and dead trees (Martell 1992). Along the Colorado Front Range, bald eagles generally nest in trees near rivers and lakes, although individual pairs may occasionally nest in upland trees with a nearby food source (prairie dogs). Bald eagles typically seek aquatic habitat for foraging and prefer fish, although they also feed on birds, mammals, and carrion, particularly in winter (Buehler 2000; Sharps and Uresk 1990). Prairie dogs provide a major food resource for bald eagles in Colorado (Environmental Science and Engineering 1988; Kingery 1998). In the winter, bald eagles communally roost in large trees for warmth and protection (Buehler 2000). Potential Habitat There are three known bald eagle nest sites along the TWP study buffer (Figure 4): one likely active nest located near Lake Canal Reservoir No. 1 east of County Line Road (Figures 5.51-5.53); one active nest along the Poudre River, west of the intersection of County Road 13 and Weld County Road 68 (Highway 392; Figure 5.49); and a likely active eagle pair with alternative nests located along St. Vra in Creek east of Weld County Road 17 and north of Highway 66 (Figures 5.21-5.23; ERO 2019, 2020; CPW 2020b). Another known nest site occurs along Stanley Ditch, south of Weld County Road 18; however, this nest has reportedly been destroyed (Figures 5.11 and 5.12; CPW 2020b). CPW recommends seasonal restrictions for human activities within a'4 -mile radius of active nests from October 15 through July 31. The buffers for the nests discussed above overlap the TWP study buffer (Figures 5.11, 5.12, 5.20-5.23, and 5.49-5.53). The TWP study buffer also overlaps bald eagle winter range, winter concentration areas, and winter and summer forage areas at several locations (Figure 4). The rest of the TWP study buffer provides some suitable habitat for cottontail rabbits and small rodents that would provide prey for bald eagles. Prairie dogs provide potential prey, and numerous poles and structures provide perching opportunities for eagles and other raptors. Impacts Many sections of the TWP study buffer experience consistent human activity (e.g., farming and local traffic), and construction of the TWP is unlikely to appreciably increase the level of disturbance. Thus, construction activities would not likely impact eagles, because recommended seasonal restrictions and buffers would be followed. Thornton will review the status of known eagle nests and roosts prior to construction. If any active bald eagle nests are located, Thornton would comply with CPW seasonal ERO Project #5241 15 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado restrictions to surface activity within recommended buffers (X mile) around active nest sites during construction and would coordinate with CPW to determine and implement any BMPs that would minimize or eliminate impacts on active bald eagle nests. Black -Necked Stilt Species Background The black -necked stilt (Himantopus mexicanus) is ranked vulnerable in the state of Colorado by the CNHP (CNHP 2021) and is federally protected under the MBTA. In the United States, black -necked stilts are commonly found in salt ponds, flooded lowlands, and shallow lagoons. Sewage ponds, flooded pastures, and other human -maintained wetlands are particularly suitable habitat for these birds as these environments have sparse vegetation without being too overgrown. Black -necked stilts nest on the ground. They tend to build on surfaces above water, such as small islands or clumps of vegetation. Because black -necked stilts are wetland birds, they are vulnerable to polluted runoff, including pesticides and selenium, and are sometimes monitored as indicators of contaminated irrigation water (Cornell Lab of Ornithology 2021). Potential Habitat Suitable habitat exists for the black -necked stilt in the TWP study buffer. In addition, this species has been known to breed in scattered locations in western and southwestern Weld County (Colorado Breeding Bird Atlas II [COBRA II] 2016). Although ER0 did not observe this species in the TWP study buffer during the 2016 through 2020 site visits, black -necked stilts may nest or forage in the TWP study buffer. Impacts Temporary disturbance and displacement could occur during construction activities; however, the proposed TWP would not adversely affect the black -necked stilt over the long term. Burrowing Owl Species Background The western burrowing owl (Athene cunicularia; burrowing owl) is a small migrant owl listed by the State of Colorado as a threatened species and is federally protected under the MBTA. Primary threats to the burrowing owl include habitat loss and fragmentation, anthropogenic sources of mortality► such as vehicular collisions, and loss of wintering grounds, largely in Mexico (McDonald et al. 2004). In general, burrowing owls are found in grasslands with vegetation less than 4 inches high and a relatively large proportion of bare ground (Gillihan and Hutchings 2000). In Colorado, burrowing owls are usually associated with black -tailed prairie dog colonies (COBBA II 2016; Andrews and Righter 1992). More than 70 percent of sightings reported in Colorado Breeding Bird Atlases were in prairie dog colonies (COBBA II 2016). Burrowing owls usually arrive at their breeding grounds around mid -March to early April and remain until September (Haug and Oliphant 1990). Burrowing owls are present in Colorado between March 15 and October 31, with breeding from mid - April to early/mid-August (Andrews and Righter 1992; COBBA II 2016). ERO Project #5241 16 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Potential Habitat The prairie dog burrows in the TWP study buffer are potential habitat for burrowing owls (Figures 5.01, 5.04-5,08, 5.10-5.13, 5.17, 5.18, 5.23-5.25, 5.31/ 5.48-5.50, 5.55, 5,62, 5.65/ and 5.66). Impacts Since prairie dog burrows are present in the TWP study buffer, burrowing owls could be directly affected by project activities. CPW recommends a buffer of % mile (660 feet) surrounding active burrowing owl nests (CPW 2020d). CPW also recommends conducting burrowing owl clearance surveys in prairie dog towns that are subject to prairie dog poisoning or construction projects from March 15 through October 31 (CPW 2020d). Construction occurring between November 1 and March 14 would not require clearance surveys. If burrowing owls are found within the construction footprint, individual nest burrows and a 660 -foot buffer around the burrow would be left undisturbed until the owls have moved or migrated from the site, which would be determined through monitoring (CPW 2020d). Additionally, prairie dogs could be controlled (see Black -Tailed Prairie Dog) before construction between November 1 and March 14 and burrows closed to discourage nesting by burrowing owls before construction. Thornton would follow the CPW guidelines so that impacts on nesting burrowing owls from the TWP would be minimized. Chestnut -collared Longspur Species Background The chestnut -collared longspur (Calcarlus ornatus) is currently considered a critically imperiled species in Colorado (CNHP 2021). Chestnut -collared longspur breeds in shortgrass prairie habitats with sparse, open vegetation. Breeding occurs from southern Alberta to southern Manitoba Canada, southeast of the Rocky Mountains to northeastern Colorado, western Kansas, north -central Nebraska, and western Minnesota (Hill and Gould 1997; American Ornithologists' Union 1998). In Colorado, breeding habitat for this species occurs in northern Weld County, outside of the TWP study buffer (CPW 2020b). Potential Habitat The TWP study buffer does not contain suitable nesting habitat and occurs outside of chestnut -collared longspur breeding range (CPW 2020b). However, it is possible that this species migrates through and forages in the area. Impacts Chestnut -collared longspurs may avoid foraging in the TWP study buffer during construction activities; however, the proposed TWP would not adversely affect this species over the long term and would have no impacts on nesting. Ferruginous Hawk Species Background The ferruginous hawk (Buteo regalis) is the largest hawk in North America and is listed as a state species of concern (CPW 2021b). This species is also protected under the MBTA. This species inhabits open prairie and desert habitats and is strongly associated with primary prey species such as ground squirrels ERO Project #5241 17 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado and jackrabbits. Ferruginous hawks are relatively common winter residents in eastern Colorado, particularly in association with black -tailed prairie dogs (Preston and Beane 1996). Preferred habitat for this species consists of expansive grasslands and shrublands (Preston 1998). Conversion of native shortgrass prairie to urban development or heavily grazed rangeland has posed a significant threat to populations of this species in Colorado. Potential Habitat Ferruginous hawks are known to breed in central and eastern Weld County (COBRA II 2016). The TWP study buffer is within ferruginous hawk breeding range beginning approximately 1.4 miles north of County Road 20 through the north end of the alignment in Weld County (CPW 2019b). Although ERO did not find any active or inactive nests of ferruginous hawks in the TWP study buffer during the 2016 through 2020 site visits, ferruginous hawks may occasionally forage in the TWP study buffer during migration and winter. Impacts Temporary disturbance and displacement could occur during construction activities; however, the proposed TWP would not adversely affect the ferruginous hawk over the long term. If an active ferruginous hawk nest were found before or during construction, Thornton would comply with CPW seasonal restrictions (February 1 through July 15) within recommended buffers (14 mile) around active nest sites during construction to minimize impacts (CPW 2020d). Greater Prairie Chicken Species Background The greater prairie chicken (Tympanuchus cupido pinnatus) can be found in northeastern Colorado, where they are fairly common local residents in the sandhills of Yuma County as well as extreme eastern Washington County and extreme southern Phillips County (CPW 2017). Their habitat includes mid- tallgrass and tallgrass areas of the Great Plains that feature permanent grasslands with open, rolling topography (Robb and Schroeder 2005). They inhabit sandhills identified by the prevalence of sand sagebrush and small soapweed (Schroeder and Braun 1992). Potential Habitat The TWP study buffer overlaps the historical range of the greater prairie chicken from the Cache la Poudre River to the north end of the TWP alignment (CPW 2020a; Figure 6); however, no recent presence of the greater prairie chicken is documented in the TWP study buffer (CPW 2020a). As such, the greater prairie chicken is unlikely to occur in the TWP study buffer or be affected by actions in the TWP study buffer. Impacts The proposed TWP would not likely adversely affect the greater prairie chicken. ERO Project #5241 18 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Long -Billed Curlew Species Background The long -billed curlew (Numenius americanus) is a state species of concern that inhabits native grassland areas in Colorado (CPW 2021b). Although some evidence indicates this species may be dependent on water to some degree, it will nest in dry areas fairly far from large water bodies. The species is known to breed in scattered areas in northeastern Colorado but is more common in the southeastern portion of the state (Nelson 1998). Historically, the long -billed curlew ranged from Illinois to California and south to Texas (Kingery 1998). Potential Habitat The TWP study buffer contains potential habitat for the long -billed curlew, and beginning north of County Road 36.5, the TWP study buffer occurs within its breeding range (CPW 2019b). The Colorado Breeding Bird Atlas has identified breeding pairs of curlews scattered throughout grasslands in Weld County► (Kingery 1998; COBBA II 2016). However, the long -billed curlew has not been recorded in the TWP study buffer, and the Colorado Breeding Bird Atlas indicates a decrease in distribution in northern Colorado (COBRA II 2016). Impacts The proposed TWP would not likely adversely affect the long -billed curlew. Mo un to in Plover Species Background The mountain plover (Charadrius montanus) is a state species of concern that inhabits dry tablelands and the Colorado Plateau. This species nests primarily in shortgrass prairie sites used historically by prairie dogs, bison, and pronghorn. The mountain plover breeds from northern Montana, Wyoming, and Colorado to central New Mexico. The winter range of this species extends from central California to southern Arizona into northern Mexico. The mountain plover's habitat requirements generally consist of open, flat tablelands and short, intensively grazed grasslands. Typically, plovers nest in areas that maintain about 30 percent bare ground and are often found in disturbed habitats, burned prairie, fallow agricultural fields, and prairie dog colonies (Knopf and Wunder 2006). This species avoids vegetation more than 6 inches high and hillsides. Potential Habitat Mountain plovers have been recorded breeding in shortgrass habitat and fallow agricultural fields throughout eastern Weld County (Kingery 1998; COBBA II 2016). North of Weld County Road 52 1, the TWP study buffer occurs within its breeding range (CPW 2020b); however, little suitable habitat for the mountain plover exists in the TWP study buffer due to human disturbance, and there are no recent records of breeding mountain plovers in the TWP study buffer (COBBA II 2016). Impacts The proposed TWP would not likely adversely affect the mountain plover. ERO Project #5241 19 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Peregrine Falcon Species Background Currently, the peregrine falcon (Falco peregrines anatum) is listed as a state species of concern. Peregrines nest on high, steep cliffs generally along stream courses. Peregrine falcons migrate through eastern Colorado and nest in canyons and cliffs along the Front Range. They feed almost exclusively on birds, including medium-sized birds such as jays, doves, flickers, shorebirds, and songbirds (Kingery 1998; Craig and Enderson 2004). Preferred hunting areas include cropland, meadows, river bottoms, marshes, and lakes that attract abundant bird life. Peregrines may travel up to 17 miles from nesting cliffs to hunting areas (Service 1984). Potential Habitat The TWP study buffer does not contain suitable nesting habitat for peregrine falcons. However, it is possible that peregrines forage in the area, especially near open water, drainage corridors, and other areas where waterfowl and other typical prey species are most abundant. Impacts The peregrine falcon may avoid foraging in the TWP study buffer during construction activities; however, the proposed TWP would not adversely affect the peregrine falcon over the long term and would have no impacts on nesting. White-faced Ibis Species Background The white-faced ibis (Plegadis chihi) is currently considered an imperiled species in Colorado (CNHP 2021). White-faced ibis habitat includes mostly freshwater habitats including marshes, swamps, ponds, and rivers (American Ornithologists' Union 1983). Within Colorado, breeding habitat for this species occurs in the south-central portion of the state (CPW 2020b). Potential Habitat The TWP study buffer occurs outside of the white-faced ibis breeding range (CPW 2020b); however, it is possible that this species migrates through and forages in the area. Impacts The white-faced ibis may avoid foraging in the TWP study buffer during construction activities; however, the proposed TWP would not adversely affect this species over the long term and would have no impacts on nesting. Brassy Minnow Species Background The brassy minnow (Hybognathus hankinsoni), a state threatened species, is a small native fish of the Colorado plains. It inhabits pools and channels within small streams with sand to gravel substrate and aquatic vegetation. In Colorado, brassy minnows are found in low numbers in the South Platte and Republican River Basins and in the backwaters of the Colorado River (CDOW 2006; CPW 2016a). The ERO Project #5241 20 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas ►+'eld County, Colorado brassy minnow was found in lower St. Vrain Creek and Spottlewood Creek, both tributaries of the South Platte River, in 1982 (CDOT n.d.). In addition, a reproducing minnow population was reported from the La rimer and Weld Canal east of Fort Collins near Severance (Platania 1990). Potential Habitat The brassy minnow has historically been collected in St. Vrain Creek, the Poudre River, and the South Platte River; however, no recent presence of the brassy minnow is documented in the TWP study buffer (CPW 2020b). As such, the brassy minnow is unlikely to occur in the TWP study buffer or be affected by actions in the TWP study buffer. Impacts The use of trenchless construction methods under St. Vrain Creek, the Poudre River, and other streams with suitable habitat would eliminate potential direct impacts on brassy minnows. Common Shiner Species Background The common shiner (Luxilus cornutus), a state threatened species, is a medium-sized minnow that inhabits moderate -gradient streams with cool, clear water and gravel bottoms that are shaded by vegetation (CDOW 2006; Woodling 1985). In Colorado, the distribution of the common shiner is localized in the South Platte River Basin; the species is found primarily in St. Vrain Creek and the Upper South Platte River tributary system (U.S. Geological Survey 2007), including the Big Thompson and Poudre Rivers. The common shiner feeds on aquatic insects in the summer and winter, small fish in the fall, and both plant material and small fish in the spring. This species spawns on gravel beds in flowing water, often at the head of a riffle area (CDOW 2006). The common shiner appears to be sensitive to habitat changes due to siltation events. Potential Habitat The common shiner has historically been collected in cool transitional -zone streams of the South Platte River Basin, including St. Vrain Creek and the Poudre River, and potentially occurs in the TWP study buffer; thus, it could be affected by actions in the TWP study buffer. Impacts The use of trenchless construction methods under St. Vrain Creek, the Poudre River, and other streams with suitable habitat would eliminate potential direct impacts on common shiners. Iowa Darter Species Background The Iowa darter (Etheasto►ma exile) is a state species of concern that prefers cool, clear water over a sand or organic matter substrate (CDOW 2006; Wood ling 1985). Iowa darters are native to Colorado and are found throughout the Front Range in streams and ponds (USFS n.d.). Specifically, populations are found in some plains streams in northeast Colorado, Plum Creek, and single locations on St. Vrain ERO Project #5241 21 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Creek and the Big Thompson River, as well as Eleven Mile Reservoir in South Park. Iowa darters have also been introduced to the upper Colorado River Basin (Woodling 1985). The Iowa darter eats small aquatic invertebrates and spawns in the spring to early summer in shallow water over vegetation (CDOW 2006). In Colorado, this species' abundance is relatively low, and populations are likely on a downward trend. Reduction in habitat due to urban and industrial development along the Front Range continues to put Iowa darter habitat at risk. However, given the habitat requirements of the Iowa darter, this species is able to cope with environmental changes as long as development or natural disturbances do not preclude water availability (USFS n.d.). Potential Habitat The Iowa darter has historically been collected in St. V'rain Creek, the Poudre River, and the Big Thompson River and potentially occurs in the TWP study buffer; therefore, could be potentially affected by actions in the TWP study buffer. Impacts The use of trenchless construction methods under St. Vrain Creek, the Poudre River, and streams with suitable habitat would eliminate potential direct impacts on Iowa darters. Stonea t Species Background The stonecat (Noturusfiavus) is a small catfish listed as a state species of concern. Stonecats inhabit fast water riffles and runs of streams with sand -gravel bottoms, often under rocks with debris (CDOW 2006). Colorado is on the western edge of the stonecat's natural range. The species' Colorado distribution is limited to the Republican and South Platte River Basins, although its distribution in Colorado is not well known. In 1984, one specimen was collected from St. Vrain Creek near Longmont, Colorado (Woodling 1985). Platania et al. (1986) reported St. Vrain Creek specimens being collected from a variety of habitats with available cover, including undercut banks and a shallow unvegetated pool. Potential Habitat The stonecat has historically been collected in St. Vrain Creek near Longmont, Colorado, and could occur in the TWP study buffer; thus, could be potentially affected by actions in the TWP study buffer. Impacts The use of trenchless construction methods under St. Vrain Creek and other streams with suitable habitat would eliminate potential direct impacts on stonecats. Suckermouth Minnow Species Background The suckermouth minnow (Phenacobius mirabilis) is a small fish listed as endangered in the state of Colorado (CPW 2021b). This minnow inhabits riffle areas of warm prairie streams of all sizes with low to moderate currents and year-round flows. This species is more tolerant of silty waters than many other fish, but it does require permanent flows. In Colorado, the suckermouth minnow is limited to the ERO Project #5241 22 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado eastern plains, in portions of the mainstem South Platte River and lower mainstem and some tributaries of the Arkansas River. In addition, this species is a rare inhabitant of the Arikaree River (Woodling 1985). Potential Habitat The suckermouth minnow has historically been collected in St. Vrain Creek; however, no recent presence of the suckermouth minnow is documented in the TWP study buffer (CPW 2020b). As such, the suckermouth minnow is unlikely to occur in the TWP study buffer or be affected by actions in the TWP study buffer. Impacts The use of trenchless construction methods under St. Vrain Creek and other streams with suitable habitat would eliminate potential direct impacts on suckermouth minnows. Plains stonefly Species Background The plains stonefly (Mesocapnia frisoni), listed as critically imperiled in Colorado, occurs in a few low - elevation streams near the Southern Rocky Mountains of Utah, Colorado, and New Mexico (Baumann and Gaufin 1970; Opler and Kondratieff 1997). In Colorado, the species is only known to occur in the Little Thompson River, Historically, this stonefly was likely widely distributed in Colorado, but has undergone severe range reduction due to stream modifications associated with agricultural and urban development (CNHP 2018). Potential Habitat The plains stonefly is known to occur in the Little Thompson River and could occur in the TWP study buffer; thus, it could be potentially affected by actions in the TWP study buffer. Impacts The use of trenchless construction methods under the Little Thompson River would eliminate potential direct impacts on the plains stonefly. Raptors and Other Migratory Birds Background Raptors Raptors are protected under the MBTA (see Other Migratory Birds below). In addition, CPW has published recommended buffer zones and seasonal restrictions for raptors in Colorado to minimize the effects of disturbance (CPW 2020). The recommended buffers are 1/3 mile for red-tailed hawks and' to Yz mile for other raptors, including bald and golden eagles. CPW has recommended buffers for nesting raptors as well, depending on the species (generally 14 or % mile) (CPW 2020). Like bald eagles (addressed in the State Animal Species of Concern section of this report), golden eagles are also protected by the BGEPA. Golden eagles nest in a variety of habitats —most often on cliffs and occasionally in large trees. They typically forageover vast areas in search of prey that includes small ERO Project #5241 23 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado rodents, rabbits, hares, and carrion, particularly in winter (Kingery 1998). Breeding bird surveys found golden eagle nesting areas over the western two-thirds of Colorado (Kingery 1998). Other Migratory Birds Migratory birds, as well as their eggs and nests, are protected under the MBTA. While destruction of a nest by itself is not prohibited under the MBTA, nest destruction that results in the unpermitted take of migratory birds or their eggs is illegal (Service 2003). The regulatory definition of a take is to pursue, hunt, shoot, wound, kill, trap, capture, or collect; or attempt to pursue, hunt, shoot, wound, kill, trap, capture, or collect (50 Code of Federal Regulations 10.12). Under the MBTA, the Service may issue nest depredation permits, which allow a permittee to remove an active nest. The Service, however, issues few permits and only under specific circumstances/ usually related to human health and safety. Obtaining a nest depredation permit is unlikely and involves a process that takes, at a minimum, 8 to 12 weeks. The best way to comply with the MBTA is to remove vegetation in construction areas outside of the active breeding season, which typically falls between March and August, depending on the species. Public awareness of the MBTA has grown in recent years, and most MBTA enforcement actions are the result of a concerned member of the community reporting noncompliance. Potential Habitat Raptors ERO conducted raptor surveys in 2019 and 2020 in segments of the TWP study buffer. A total of 15 raptor nests were identified in Weld County during the surveys, among which 4 occur in the TWP study buffer and 11 occur near the TWP study buffer; the buffers for these 11 nests may overlap the TWP study buffer (Figure 4). Of the four raptor nests observed in the TWP study buffer one was determined to be active and three were of unknown status (Table 3; Figures 5.18, 5.31, 5.50, and 5.56). Of the remaining 11 raptor nests observed near the TWP study buffer, 4 were identified as active, 2 were determined to be inactive, and 5 were of unknown status (Table 3; Figures 5.03/ 5.08, 5.20, 5.21, 5.35, 5.49, 5.59, 5.60, and 5.62). In addition, a CPW raptor nest database (CPW 2020b) shows seven nests located in or near the TWP study buffer in Weld County, which include five red-tailed hawk nests, one Swainson's hawk nest, and one unknown raptor nest (Table 3). Table 3. Raptor nest locations in or near the TWP study buffer. Raptor Type Status Source Latitude Longitude Figure Number(s) Location to TWP Buffer Relative Study Location Unincorporated or Incorporated Weld County within Red-tailed hawk Unknown ERO 40.180948 -104.90437 5.18 In TWP buffer study Unincorporated Red-tailed hawk Active ERO 40.306869 -104.92367 5.31 In TWP buffer study Unincorporated Unknown raptor Unknown ERO 40.487363 -104.94347 5.50 In TWP buffer study Unincorporated Unknown raptor Unknown ERO 40.548763 -104.9426 5.56 In TWP study buffer Incorporated ERO Project #5241 24 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project -Weld County Permit Areas Weld County, Colorado Raptor Type Status Source Latitude Longitude Number(s) Figure Location to TWP Relative Study Buffer Location Unincorporated or Incorporated WeldCounty within Red-tailed hawk Unknown ERO 40.020284 -104.89978 5.03 Outside study TWP buffer Unincorporated Red-tailed hawk Unknown ERO 40.07222 -104.90199 5.08 Outside study TWP buffer Unincorporated Unknown raptor Unknown ERO 40.20145 -104.90746 5.20, 5.21 Outside study TWP buffer Unincorporated Unknown raptor Inactive ERO 40.338036 -104.9451 5.35 Outside study TWP buffer Incorporated Red-tailed hawk Active ERO 40.476012 -104.9493 5.49 Outside study TWP buffer Incorporated Unknown raptor Inactive ERO 40.473606 -104.94756 5.49 Outside study TWP buffer Incorporated Unknown raptor Unknown ERO 40.587628 -104.94534 5.59, 5.60 Outside study TWP buffer Unincorporated Red-tailed hawk Unknown ERO 40.610018 -104.94315 5.62 Outside study TWP buffer Unincorporated Red-tailed hawk Active ERO 40.309628 -104.93259 N/A Outside study TWP buffer Unincorporated Red-tailed hawk Active ERO 40.334128 -104.92383 N/A Outside study TWP buffer Incorporated Red-tailed hawk Active ERO 40.598349 -104.93569 N/A Outside study TWP buffer Unincorporated Red-tailed hawk Unknown CPW - - - In TWP buffer study Unincorporated Unknown raptor Unknown CPW - - - In TWP buffer study Unincorporated Red-tailed hawk Unknown CPW - - In TWP buffer study Incorporated Red-tailed hawk Unknown CPW - - - In TWP buffer study Unincorporated Red-tailed hawk Unknown CPW - - - Outside study TWP buffer Unincorporated Red-tailed hawk Unknown CPW - - - Outside study TWP buffer Unincorporated Swainson's hawk Unknown CPW - - - Outside study TWP buffer Unincorporated Note: Locations of potential nests identified through the CPW raptor nest database (CPW 2020b) are not included in this report per a nondisclosure agreement with CPW to keep nest location information confidential. *N/A = not applicable -outside of TWP study buffer. The short -eared owl (Asio flammeus) is likely to occur in or near the TWP study buffer, although none were observed during the 2016 through 2020 site visits. Owls are strongly associated with wetland habitats near extensive grasslands and are known to breed in Weld County (COBRA II 2016; CPW 2016b). Golden eagles are known to breed in eastern Larimer County. In addition, golden eagles have been known to breed in scattered locations in Weld County (COBRA II 2016). However, no golden eagles currently nest in or near the TWP study buffer (CPW 2020b), although individuals may occasionally forage within the TWP study buffer. Osprey (Pondion haiiaetus) are also known to breed in Weld County, and the TWP study buffer crosses through an osprey foraging area at Timnath Reservoir (COBRA II 2016; CPW 2020a; Figure 6). During the 2019 site visit, ERO observed a potentially active osprey nest ERO Project #5241 25 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas ►+'eld County, Colorado along an unnamed drainage southwest of the intersection of the Poudre River and the TWP study► buffer. Other Migratory Birds No migratory bird nests were observed during the 2016 through 2020 site visits; however, suitable nesting habitat is present throughout the TWP study buffer for a variety of bird species. Ground -nesting and other birds could nest in the grasslands and trees in and near the TWP study buffer. The cattails and other wetland and riparian vegetation along the TWP study buffer offer potential habitat for a variety of songbirds. The breeding season for most birds in Colorado is between March and August, with the exception of a few species that start in February, such as great horned owls. Impacts Physical disturbance, displacement, and clearing of upland and wetland habitats could affect raptors and other migratory birds during construction. However, these impacts would be temporary, and many habitats would recover quickly after construction. If feasible based on property owner operations, preferences, and requirements, Thornton plans to clear vegetation in construction areas before the nesting season to minimize impacts on nesting birds. Thornton would review the CPW raptor nest data and perform nest surveys for raptors before the nesting season to identify potential active raptor nests before construction. Thornton would coordinate with CPW regarding any potential conflicts between scheduled construction and potential raptor nests and develop measures acceptable to CPW to minimize impacts on nesting raptors. Big Game/Large Mammals Big game wildlife species such as deer and pronghorn are considered economically important species in Colorado. According to CPW, American pronghorn (pronghorn; Antilocapra americana), mule deer (Odocoileus hemionus), and white-tailed deer (Odocoileus virginianus) are the big game species with potential habitat in or near the TWP study buffer (Figures 6 and 7). Summaries describing these species and their potential habitat in the TWP study► buffer are provided below. American Pronghorn In Colorado, pronghorn are most commonly observed on the eastern plains, in the larger mountain parks and valleys, and on shrublands west of the mountains. Pronghorn generally live in grasslands and semidesert shrublands on rolling topography that provides good visibility (CPW 2021a). Pronghorn tend to favor vast expanses of open areas and are typically sensitive to human presence, including residential and commercial development and habitat loss (Sawyer and Lindzey 2000). Pronghorn overall habitat is relatively widespread throughout northeastern Colorado. Grassland areas in the northern portion of the TWP study buffer could provide suitable habitat for the pronghorn. However, pronghorns were not observed during the 2016 through 2020 site visits, and the majority of the TWP study buffer does not occur within overall pronghorn range in Colorado (CPW 2020a). Pronghorn concentration areas occur where animal densities are at least 200 percent greater than in the surrounding overall range during a season other than winter. The far north end of the TWP stud► buffer ERO Project #5241 26 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado overlaps a very small portion of a pronghorn concentration area (Figure 6). Although individual pronghorn could wander in or near the northern tip of the TWP study buffer, the TWP would not impede pronghorn movement or present a physical barrier. During construction, wildlife crossovers (trench plugs) with ramps on each side of the trench could be installed at well-defined game trails. Therefore, the TWP would not likely impact pronghorn. Mule Deer In Colorado, mule deer occupy all ecosystems from grasslands to alpine tundra. Mule deer generally migrate seasonally, spending the summer months at higher altitudes and moving to lower elevations during winter. Mule deer are primarily browsers, feeding mostly on shrubs, although forbs and grasses make up a significant portion of their diet, especially in spring and summer. This species reaches its greatest densities in shrublands that provide abundant forage and cover. Mule deer breed from November through December with fawning occurring in May and June (Fitzgerald et al. 1994). Mule deer habitat is fragmented in areas with high levels of urban development, grazing, and agriculture. Mule deer are widespread throughout northeastern Colorado. Mule deer winter range, where 90 percent of the individuals are located during the average 5 winters out of 10, and severe winter range, where 90 percent of the individuals are located when the annual snowpack is at its maximum and/or temperatures are at a minimum in the 2 worst winters out of 10, occur in the TWP study buffer at several locations (Figure 7). A mule deer concentration area (densities are at least 200 percent greater than the surrounding winter range density) occurs in the far northern portion of the TWP study buffer. Only one migration corridor overlaps the TWP study buffer, where the TWP area crosses St. Vrain Creek; this area is also a known resident population area (Figure 7). The TWP could temporarily impede movement of individual deer and result in the displacement of some individuals during construction activities. During construction, wildlife crossovers (trench plugs) with ramps on each side of the trench could be installed at well-defined game trails. The water pipeline would not create a substantial barrier to deer movement over the long term because the pipeline would be buried. In addition, habitat is fragmented in areas of urban and suburban development. Mule deer typically adapt to development and should not be substantially impacted by the TWP. White -Tailed Deer In Colorado, the white-tailed deer is less widespread and more secretive than the mule deer. Like mule deer, white-tailed deer occupy shrublands that provide plentiful forage and cover; however, white-tailed deer are most often seen in riparian areas bordering larger streams and rivers. Although this species does not migrate in large numbers like elk, white-tailed deer will move seasonally up and down river corridors in small numbers (Fitzgerald et al. 1994). Similar to mule deer, the white-tailed deer is common throughout northeastern Colorado, especially along riparian corridors (Fitzgerald et al. 1994). The TWP study buffer crosses white-tailed deer concentration areas and winter range at several locations (Figure 7). White-tailed deer concentration areas are considered critical habitat for white-tailed deer and occur in corridors of riparian habitat that support higher populations of white-tailed deer or serve as travel corridors. The CPW does not ERO Project #5241 27 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado designate winter or summer concentration areas or severe winter range for white-tailed deer. The TWP could temporarily impede movement of individual deer and result in the displacement of some individuals during construction activities. During construction, wildlife crossovers (trench plugs) with ramps on each side of the trench could be installed at well-defined game trails. The water pipeline would not create a substantial barrier to deer movement over the long term because the pipeline would be buried. In addition, white-tailed deer habitat is fragmented in areas with high levels of urban and suburban development. While the TWP would result in short-term impacts on white-tailed deer, long- term effects are not expected. Other Game and Nongame Species Canada Goose Canada geese (Branta canadensis) are widespread throughout north -central Colorado. The TWP study buffer occurs within Canada goose production areas (part of the overall range used by nesting and brooding Canada geese) and winter concentration areas (part of the winter range occupied by loafing or resting Canada geese where densities are significantly greater than the surrounding winter range density) where the TWP study buffer crosses the Poudre River and Timnath Reservoir. The production and winter concentration areas at the Poudre River are also mapped as a Canada goose brood concentration area (brood areas, within production areas, where Canada geese traditionally congregate in high numbers; CPW 2020a; Figure 6). In addition, this species is known to breed in scattered locations in western Weld County (COBBA II 2016). The TWP could disrupt and displace individuals during construction activities; however, the TWP would not adversely impact Canada geese or Canada goose habitat over the long term. Wild Turkey The TWP study buffer occurs within wild turkey (Meleagris gallopavo) production areas where the TWP study buffer crosses the Poudre River and St. Vrain Creek. The production area at St. Vrain Creek is also mapped as wild turkey winter range (CPW 2020a). In addition, this species has been known to breed in scattered locations in southwestern Weld County (COBBA II 2016). Although ERO did not observe this species in the TWP study buffer during the 2016 through 2020 site visits, wild turkeys may occur in or near the TWP study buffer. The TWP could disrupt and displace individuals during construction activities; however, the TWP would not adversely impact wild turkeys or wild turkey habitat over the long term. Other Wildlife Areas in the TWP study buffer provide potential habitat for other animals including coyotes, red foxes, and raccoons (Procyon lotor). Smaller animals such as cottontail rabbits (Sylvilagus spp.), deer mice (Peromyscus maniculatus), prairie voles (Microtus pennsylvanicus), plains pocket gophers (Geomys bursarius), and ground squirrels (Ictidomys tridecemlineatus and Xerospermophilus spilosoma) may also use the habitat in the TWP study buffer (Armstrong et al. 2011). Bull snakes (Pituophis catenifer), western terrestrial garter snakes (Thamnophis elegans), and other eastern plains reptiles may occur in the TWP study buffer. The plains spadefoot toad (Spea bombifrons) and Woodhouse's toad (Anaxyrus ERO Project #5241 28 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas ►+'eld County, Colorado woodhousii) likely occur in the TWP study buffer, especially near permanent water sources. The Great Plains toad (Anaxyrus cognatus) occurs throughout Weld County and may occur in the TWP study buffer. None of these species were observed during the 2016 through 2020 site visits. The TWP could displace some individuals during construction but would not have a significant long-term negative impact on these animals because these species are common and widespread throughout Weld County. Aquatic Species and Habitat Several perennial, intermittent, and ephemeral streams, lakes and ponds, wetlands, ditches, and canals occur in the TWP study buffer. These water bodies provide habitat for aquatic invertebrates that play an important role in the food chain to support larger species, including mammals and birds. Many of these areas would not be impacted because the jurisdictional waters and wetlands would be crossed using trench less construction methods. Any impacts on aquatic habitat would be temporary, and there would be no long-term effect on aquatic species or aquatic habitat. Terrestrial and Aquatic Plant Life Information on terrestrial and aquatic plants was obtained from various sources including CPW, the CNHP, the Service, published literature, and field surveys. Vegetation Communities Description Based on the 2016 through 2020 site visits and Google Earth imagery, ERO identified six broad vegetation communities in the TWP study buffer, in addition to the open water and ditch areas described in the Open Waters, Wetlands, and Riparian Areas section above. These vegetation communities include mixed upland, nonnative upland, riparian, wetlands, agricultural lands, and developed/disturbed areas. These communities are described below and are shown in Figures 3.01 3.66. Mixed Upland The mixed upland community occurs primarily in historically undisturbed uplands in the TWP study buffer. Kentucky bluegrass (Poo pratensis) and western wheatgrass (Pascopyrum smrthir) dominate this community. Other common species include needle-and-threadgrass (1-lesperostipa comata), fringed sage (Artemesfa frigfda), switchgrass, and foxtail barley (Hordeum jubaium). Some three -leaf sumac (Rhus trilobata), soapweed yucca (Yucca glauca), rubber rabbitbrush (Ericameria nauseosa), and other shrubs are scattered throughout this community. Noxious weeds such as cheatgrass (eromus tectorum) and field bindweed (C'onvo/vulus arvensis) also occur in this vegetation community type. Mixed uplands in the TWP study buffer are of moderate quality because they have been grazed in the past and contain some weeds. The mixed upland community occurs in two separate sections of the TWP study buffer: one in the southern section along Unnamed Drainage 2 (Figure 3.01) and one surrounded by agricultural land north of County Road 90 (Figures 3.64-3.66). ERO Project #5241 29 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Nonnative Upland The nonnative upland community occurs throughout the TWP study buffer and includes areas that have been historically disturbed by heavy grazing, tilling, and hay production. In many cases, introduced species and pasture grasses dominate the community. The nonnative upland community is dominated by species such as smooth brome (Bromus inermis), Japanese brome (Bromus japonicus), crested wheatgrass (Agropyron cristatum), and kochia (Bassin scoparia), which predominantly occur along roadsides and other disturbed areas throughout the TWP study buffer (Appendix A, Photos 1 and 8). Noxious weed species such as diffuse knapweed (Centaurea diffusa) and cheatgrass also occur in this vegetation community type. Riparian The riparian community includes moist areas along the larger tributaries and rivers in the TWP study buffer (Appendix A, Photo 3). Some areas mapped remotely as riparian may include potential wetlands as well (see Wetlands discussion below). Depending on the site, plains cottonwood (Populus deltoides), crack willow (Salix fragilis), and peachleaf willow (Salix annygdaloides) form the overstory with a shrub layer of chokecherry (Prunus virginiana), American plum (Prunus americana), western snowberry (Symphoricarpos occidentalis), Woods' rose (Rosa woodsii), and sandbar willow. The noxious weed tree Russian olive (Elaeagnus angustifolia) is common in this cover type. Smooth brome and Kentucky bluegrass dominate the understory. Wetlands Wetlands occur along several of the potential waters of the U.S. identified in the Open Waters, Wetlands, and Riparian Areas section of this revised report (Appendix A, Photo 4). Wetlands occur as fringes or wide benches along drainages, roadside swales, ponds, and lakes, and as isolated depressions. Many of the potential wetlands along the perennial streams are abutted by riparian vegetation. Vegetation in the wetlands is dominated by plains cottonwood, sandbar willow, narrowleaf cattail (Typha angustifolia), broadleaf cattail, Baltic rush, Nebraska sedge, and reed canarygrass. Agricultural Lands Tilled and/or managed agricultural lands are common throughout the TWP study buffer (Appendix A, Photo 9). Agricultural lands are characterized by crops such as alfalfa, corn, small grains, and soy, as well as fallow ground and disturbed areas associated with agriculture. Developed/Disturbed Areas Developed/disturbed areas occur throughout the TWP study buffer (Appendix A, Photo 10). Developed/disturbed areas have received heavy human use, including livestock concentration areas; buildings and surrounding disturbed areas; and roads, trails, and other developed areas. Developed/disturbed areas in the TWP study buffer are either bare or dominated by annual and noxious weed species such as kochia, cheatgrass, curly dock (Rumex crispus), biennial thistles, and diffuse knapweed. ERO Project #5241 30 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Impacts Table 4 lists the total acreages of each community in the TWP study buffer. The majority of the impacts on vegetation would be temporary. Permanent impacts would occur from construction of the pump stations and tank sites. All temporarily disturbed areas would be returned to preconstruction grades and seeded with native vegetation, or as reasonably specified by the property owner, once construction is complete. Because most of the impacts on vegetation would be temporary, there would be no long- term adverse effects on vegetation. Table 4. Total acreages of vegetation communities in the TWP study buffer and work limits. Vegetation Community Acres Unincorporated County Limits/TWP Buffer) in (Work Study Weld Acres Weld Limits/TWP in Incorporated County Buffer) (Work Study Total Limits/TWP Acres Buffer) (Work Study Mixed upland 12.05/80.09 0/0 12.05/80.09 Nonnative upland 97.54/831.96 17.69/170.9 115.23/1,002.86 Riparian 0.89/11.04 0.08/6.08 0.97/17.12 Wetlands 6.76/64.05 0.32/13.83 7.08/77.88 Agricultural lands 241.96/2,390.1 85.96/685.4 327.92/3,075.5 Developed/disturbed areas 35.56/712.14 39.98/251.94 75.54/964.08 Total 394.74/4,089.37 144.03/1,128.1.5 538.77/5,217.52 Federal Threatened, Endangered, and Candidate Plant Species Two plant species listed as threatened or endangered have the potential to occur in Weld County or be affected by projects occurring in Weld County (Table 5). The TWP study buffer was assessed for suitable habitat for these two species. Only species with suitable habitat present in the TWP study buffer are described in further detail below. Table 5. Federally threatened and endangered plant species potentially found in Weld County or potentially affected by projects in Weld County. Common Name Scientific Name Status* County Habitat Suitable Habitat Present Ute orchid ladies' -tresses Spiranthes diluvialis Weld Moist floodplains and below around to wet 7,800 of springs alluvial feet perennial and in elevation meadows, lakes streams, Yes FT Western prairie fringed orchid** Platanttera praeclara — Moist meadows to wet prairies and Platte No species section above FT see River *FT = Federally Threatened Species. **Water depletions in the South Platte River may affect the species and/or critical habitat in downstream reaches in other counties or states. Source: Service 2021. ERO Project #5241 31 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas ►+'eld County, Colorado Lite Ladies` -Tresses Orchid Species Background Ute ladies' -tresses orchid (Spiranthes diluvialis; ULTO) is federally listed as threatened. This species occurs at elevations below 6,500 feet in moist to wet alluvial meadows, in floodplains of perennial streams, and around springs and lakes where the soil is seasonally saturated within 18 inches of the surface. Generally, the species occurs where the vegetative cover is relatively open and not overly dense or overgrazed. Once thought to be fairly common in low -elevation riparian areas in the interior western United States, ULTO is now considered rare (Service 1992a). In Colorado, the Service requires surveys in areas of suitable habitat on the 100 -year floodplains of the South Platte River, Fountain Creek, and the Yampa River, and their perennial tributaries; or in any area with suitable habitat in Boulder and Jefferson Counties (Service 1992b). ULTO does not bloom until late July to early September (depending on the year), and the timing of surveys must be synchronized with blooming (Service 1992b). Potential Habitat Because the TWP study buffer falls within survey guidelines for ULTO, ERO assessed the TWP study buffer for potential ULTO habitat. Big Dry Creek/ Little Dry Creek, St. Vrain Creek, the Little Thompson River, the Big Thompson River, and the Poudre River fall within ULTO survey guidelines as potential habitat because they are perennial tributaries to the South Platte River in Weld County. In addition, the Larimer and Weld Canal falls within survey guidelines as potential habitat because ULTO is known to occur along perennial ditches. The potential wetlands abutting or adjacent to St. Vrain Creek, the Big Thompson River, and the Poudre River are potential suitable ULTO habitat (Appendix A, Photo 11). Wetlands along Little Dry Creek and the Little Thompson River are too densely vegetated to allow the establishment of the generally shade - intolerant ULTO. Big Dry Creek and the Larimer and Weld Canal are incised channels with no wetland or wet meadow► habitat suitable for ULTO. The remaining potential wetlands in the TWP study buffer do not fall within ULTO survey guidelines because they do not occur along perennial drainages. In addition, most of the wetlands in the TWP study buffer do not contain the sparsely vegetated pockets of species such as redtop or Baltic rush where ULTO is typically found; most of the wetlands contain dense cattails, sandbar willows, or reed canarygrass. Table 6 lists drainages in the TWP study buffer that fall within survey guidelines as potential ULTO habitat. Impacts No impacts on ULTO would occur from the TWP. A► site assessment would be completed along the above drainages to determine the boundaries of potential ULTO habitat. Trenchless construction methods anticipated to be used in the construction of the TWP would eliminate impacts on drainages that are considered jurisdictional wetlands and waters of the U.S. and/or contain potential habitat for ULTO. A habitat assessment would be submitted to the Service prior to construction to confirm that the TWP would have no effect on ULTO. ERO Project #5241 32 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Table 6. Areas in the TWP study buffer with potential habitat for ULTO. Drainage Name Figure Number(s) Latitude Longitude Suitable Present Habitat Big Dry Creek 3.02, 3.03 40.01650009 -104.904511 No Little Dry Creek 3.07, 3.08 40.06932574 -104.905069 No St. Vrain Creek 3.20, 3.21 40.20507684 -104.906722 Yes Little Thompson River 3.32, 3.33 40.31552406 -104.924330 No Big Thompson River 3.40 40.38132458 -104.935396 Yes Cache la Poudre River 3.49 40.47248089 -104.942187 Yes Larimer and Weld Eaton Canal) Canal (aka 3.57, 3.58 40.56264821 -104.942849 No Rare and Sensitive Plant Species Description The CNHP maintains a list of plant species considered rare or imperiled in Colorado by county. These species are not formally protected but are considered rare or imperiled by the CNHP. Rare or imperiled plant species potentially found in Weld County with potentially suitable habitat in the TWP study buffer are summarized in Table 7. Table 7. Plant species considered rare or imperiled by the CNHP that potentially occur in the TWP study buffer. Common Name Scientific Name Ranking* Habitat Suitable Present Habitat Colorado plant butterfly Gau►ra neomexicana ssp. Coloradensis G3, Si level Subirrigated, bottoms 6,400 floodplains feet between in alluvial elevation and 5,000 soils drainage on and Yes Dwarf milkweed Asciepias uncialis ssp. Uncials G3/4, 52 Shortgrass prairie recent along Unlikely study presence the —no buffer TWP *CNHP Ranking: G1 = Critically imperiled globally, G2 = Imperiled globally, G3= Vulnerable throughout its range, G4 = Apparently secure globally, GS = Demonstrably secure globally, GH = Historical, S1 = Critically imperiled in state, S2 = Imperiled in state, S3 = Vulnerable in state, S4 = Apparently secure in state, SH = Historical. Source: CNHP 2021. Colorado Butterfly Plant Species Background The Colorado butterfly plant (Laura neonnexicana ssp. Coloradensis; CBP) is a short-lived perennial herb found in moist areas of floodplains. It occurs on subirrigated alluvial soils on level or slightly sloping floodplains and drainage bottoms at elevations from 5,000 to 6,400 feet. Colonies are often found in low depressions or along bends in wide, active, meandering stream channels that are periodically disturbed. Historically, the main cause of disturbance was probably flooding (Service 2004). CBP flowers from June to September and produces fruit from July to October (Spackman et al. 1997). ERO Project #5241 33 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Potential Habitat ERO reviewed the TWP study buffer for potential CBP habitat. The TWP study buffer does not cross any designated critical habitat for CBP, and most of the TWP study buffer was eliminated as potential habitat because it is not within an active floodplain. Of the drainage crossings in the TWP study buffer, ERO identified the Poudre River, St. Vrain Creek, and the Big Thompson River as potential CBP habitat (Appendix C, Photo 11; Table 7). The other drainages in the TWP study buffer do not contain suitable CBP habitat because of their topography or lack of wetland vegetation. Impacts No impacts on CBP would occur from the TWP. A site assessment would be completed along the above drainages to determine the boundaries of potential CBP habitat. Trenchless construction methods anticipated to be used in the construction of the TWP would eliminate impacts on drainages that are considered jurisdictional wetlands and waters of the U.S. and/or contain potential habitat for CBP. Dwarf milkweed Dwarf milkweed was last observed in Weld County, near the TWP study buffer, in 1896, and the range of dwarf milkweed has greatly contracted since the 1800s (CNHP 2021; Decker 2006). The known extant occurrences of dwarf milkweed occur in drainages tributary to the South Platte River, Arkansas River, and Rio Grande (CNHP 2020; Decker 2006). Potential Habitat Dwarf milkweed has limited potential to occur in the TWP study buffer. This species is found in high- quality shortgrass prairie and is not likely to persist in the mixed and nonnative grasslands found in the TWP study buffer. Impacts No impacts on dwarf milkweed would occur from the TWP because suitable habitat is not present in the TWP study buffer. Areas of Historic or Archaeological Importance ERO conducted a file search for the TWP study buffer in Weld County with the Office of Archaeology and Historic Preservation (OAHP). The OAHP provided file search results on April 1, 2020 (File Search No. 22631), and ERO conducted a review of the OAHP's online Compass database for realignments on January 20, 2021. The OAHP records indicate that very little of the TWP study buffer has been previously surveyed and that the TWP study buffer intersects the boundaries of 31 previously documented cultural resources. Of the previously documented resources, most are historical structures (such as railroads and irrigation ditches) or buildings; precontact and historical archaeological sites are also present in the TWP study buffer. Description The OAHP records identified 16 previously conducted cultural resource surveys in the TWP study buffer (Appendix C, Table C-1; Figures 8.01-6.17). The file search results indicate that less than 10 percent of ERO Project #5241 34 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas ►+'eld County, Colorado the TWP study buffer has been previously surveyed. Most of the previously documented surveys were completed in relationship to energy and transportation development projects more than 10 years ago. The file search identified 31 previously documented cultural resources in the TWP study buffer (Appendix C, Table C-2; Figures 8.01-8.17). Nearly all of the previously recorded resources are historical (there are two known prehistoric archaeological sites previously documented in the TWP study buffer). The majority of resources are irrigation ditch and railroad segments that are significant because of their association with the early settlement and development of agriculture in the Front Range. In addition to a file search with the OAHP, ER0 reviewed existing literature, including historical maps, tax assessor records, and the Colorado Water Conservation Board's Colorado Decision Support Systems to determine whether unevaluated cultural resources are located in the TWP study buffer. This review identified all properties in the TWP study buffer that may contain cultural resources 50 years old or older (i.e., constructed prior to 1970) (Appendix C, Table C-3). The majority of these resources are historical rural or agricultural properties and irrigation -related landscape features. Impacts Current TWP designs indicate that the TWP has little or no potential to result in any adverse effects to sites, structures, or buildings that are currently eligible, needs data, or listed on the State or National Register of Historic Places. Known impacts on cultural resources are limited to historic linear resources such as irrigation ditches and railroads (including 5WL841 and its associated segments, 5WL844, 5WL860, 5WL868, 5WL898, 5WL1975.3, 5WL2547.2, and 5WL5592.1). The TWP would likely not result in any permanent changes to the location, design, materials, setting, or association of these resources. The water pipeline will avoid historical buildings and known archaeological sites. Trenchless construction methods or open cut construction methods with reconstruction to preconstruction contours or design would be used to minimize physical impacts to any eligible or potentially eligible linear resources/ such as irrigation ditches and historic railroads. Consultation with the State Historic Preservation Officer on project effects is necessary only when state or federal permits, funding, or lands are involved. Because no federal or state agency involvement is anticipated, Thornton does not anticipate consulting with the State Historic Preservation Officer on the TVP's potential impacts to cultural resources. Monitoring and Mitigation Plan Extensive monitoring and mitigation measures would be employed during the construction and operation phases of the TWP. Construction mitigation measures include but are not limited to: Open Waters, Wetlands, and Riparian Areas • A site -specific Stormwater Management Plan and Erosion and Sediment Control Plan will be developed. ERO Project #5241 35 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado • The areas of construction will be accessed using existing roads to the maximum extent possible. Any temporary access roads will be removed upon completion of the TWP and the area restored to preconstruction conditions. • Design efforts will include criteria so that there will be no impacts on waters of the U.S., and impacts on other aquatic resources will be minimized. • During construction, open -cut trenches will be as narrow as safely practicable when crossing nonjurisdictional waters and wetlands. All jurisdictional waters of the U.S. will be crossed using trenchless construction methods. • Temporary impacts will be returned to preproject conditions following completion of the proposed activities. • BMPs will be implemented during construction, which will help minimize impacts in the TWP work limits. These BMPs could include installing temporary fencing to deter access to sensitive areas, placing staging areas in previously disturbed upland areas, and installing sediment- and erosion -control devices to minimize surface runoff in disturbed areas. • Topsoil will be salvaged and used on disturbed areas, which would be revegetated where practicable. • All temporarily disturbed areas will be planted with native seed mixes or as reasonably specified by the property owner, and mulched. Terrestrial and Aquatic Animals and Habitat • The TWP will have no effect on any federally listed threatened, endangered, or candidate wildlife species. A► site assessment will be completed to determine the boundaries of potential or suitable habitat for federally listed threatened, endangered, or candidate wildlife species to confirm that construction would not occur in those areas. A habitat assessment will be submitted to the Service prior to construction to confirm that the TWP would have no effect on Preble's or other federally listed wildlife species. • Should construction occur between February and August, a preconstruction nesting bird survey will be conducted by a biologist prior to any clearing or tree removal. Where feasible, Thornton plans to clear vegetation in construction areas prior to the nesting season to minimize impacts on nesting birds. Thornton will review the CPW raptor nest data and perform nest surveys for raptors prior to the nesting season to identify potential active raptor nests prior to construction. Thornton will coordinate with CPW regarding any potential conflicts between scheduled construction and potential raptor nests and develop measures acceptable to CPW to minimize impacts on nesting raptors. • Where feasible, in areas where construction is scheduled to occur in prairie dog colonies during times when they may be occupied by burrowing owls, prairie dogs will be controlled prior to construction between November 1 and March 14 and burrows closed to discourage nesting by burrowing owls prior to construction. Thornton will follow the CPW guidelines so that impacts on nesting burrowing owls from the TWP will be minimized. Terrestrial and Aquatic Plant Life • The TWP will have no effect on any federally listed threatened, endangered, or candidate plant species. A site assessment would be completed in potential habitat areas to determine the boundaries of potential habitat for ULTO. Trenchless construction methods anticipated to be used in the construction of the TWP would eliminate impacts on drainages that are considered jurisdictional wetlands and waters of the U.S. and/or contain potential habitat for ULTO. A ERO Project #5241 36 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —weld County Permit Areas ►+'eld County, Colorado habitat assessment will be submitted to the Service prior to construction to confirm that the TWP would have no effect on ULT°. • Temporary impacts will be returned to preproject conditions after completion of the proposed activities. • BMPs will be implemented during construction, which will help minimize impacts in the TWP work limits. These BMPs could include installing temporary fencing to deter access to sensitive areas, placing staging areas in previously disturbed upland areas, and installing sediment- and erosion -control devices to minimize surface runoff in disturbed areas. • All temporarily disturbed areas will be planted with native seed mixes or as reasonably specified by the property owner, and mulched. • Topsoil will be salvaged and used on disturbed areas, which would be revegetated where practicable. Noxious Weed Management Several noxious weed species were observed in the TWP study buffer during the 2016 through 2020 site visits, including cheatgrass, curb► dock, diffuse knapweed, field bindweed, and Russian olive. Noxious weeds within the TWP work limits will be controlled using the following Integrated Pest Management methods as described by the Colorado Department of Agriculture. The following methods have been developed to control noxious weeds in a manner that prevents harm to human health and to environmentally sensitive areas such as waterways and desirable vegetation including native trees. • Major equipment (e.g., truck equipment and backhoes) will be cleaned by high-pressure air or water spray before being delivered to the TWP area to avoid introducing undesirable plants and noxious weeds. • If practicable, topsoil should not be salvaged in any area densely infested with noxious weeds. • For areas where removal is not practicable or only► a small area of noxious weeds is present, all noxious weed populations in the topsoil would be pretreated. • Fertilizer or other soil amendments will not be used unless recommended by a revegetation specialist based on site -specific conditions. The use of fertilizers will be restricted because they can promote noxious weeds and can be detrimental to native species in the revegetation mix. • After construction is complete, all disturbed areas will be properly revegetated as quickly as possible. Prompt revegetation with appropriate species is essential for preventing the spread of noxious weeds. • Certified weed -free seed and mulch will be used for revegetation. Weed -free straw bales will be used for sediment barriers. • If stands of noxious weeds become established, weed control would be implemented following an integrated approach specific to the weed species present. • Because new control methods are continually being developed, particularly for herbicide applications, any control methods used will follow the Colorado Department of Agriculture and Larimer mer County recommendations at the time of implementation. Areas of Historic or Archaeological Importance • Considering that the project would avoid buildings and known archaeological sites, use a trenchless construction method, and/or reconstruct historic linear features to preconstruction designs, it is likely that the TWP will not adversely affect any archaeological sites, linear resources, or buildings eligible for listing on the State or National Register of Historic Places. ERO Project #5241 37 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado References American Ornithologists' Union. 1998. Check -list of North American birds. Seventh edition. American Ornithologists' Union, Washington, D.C. http://www.aou.org/. Andrews, R. and R. Righter. 1992. Colorado Birds. Denver Museum of Natural History. Denver. Armstrong, D.M., J.P. Fitzgerald, and C.A. Meaney. 2011. Mammals of Colorado. Second Edition. Denver Museum of Nature & Science and University Press of Colorado. Boulder, CO. Baumann, R.W. and A.R. Gaufin. 1970. The Capnia Project Complex of Western North America (Plecoptera: Capniidae). Transactions of th►e American Entomological Society 96: 435-468. Buehler, D.A. 2000. Bald Eagle (Haliaeetus leucocephalus). In The Birds of North America, No. 506 (A. Poole and F. Gill, eds.). The Birds of North America, Inc., Philadelphia, PA. Colorado Breeding Bird Atlas II (COBBA II). 2016. Breeding bird survey results. http://www.cobreedingbirdatlasii.org/. Last accessed January 14, 2021. Colorado Department of Transportation (CDOT). N.d. Brassy Minnow. https://www.codot.gov/programs/environmental/resources/environmental-cards/wildlife/o3-0303- 11.pdf. Last accessed July 24, 2016. Colorado Division of Wildlife (CDOW). 2003. State of Colorado River Otter Recovery Plan. https://cpw.state.co. us/Do+cuments/WildlifeSpecies/SpeciesofConcern/RecoveryPlans/CDOW2o03Riv erotterrecoveryplan.pdf. June. Colorado Division of Wildlife (CDOW). 2006. Pocket Guide to Native Fish of Colorado's Eastern Plains. May. Colorado Natural Heritage Program (CNHP). 2018. Level 4 Potential Conservation Area (PCA) Report. Little Thompson River at County Line. Colorado State University. Colorado Natural Heritage Program. March 3. Colorado Natural Heritage Program (CNHP). 2021. Locations and Status of Rare and/or Imperiled Species and Natural Communities known from or likely to occur within the ERO Corridor of Interest in Weld County, Colorado. Report generated January 19, 2021. Colorado State University. Colorado Natural Heritage Program. Colorado Parks and Wildlife (CPW). 2015. River Otter Overall Range. http://cpw.state.co.us/learn/Maps/River_ Otter_Overall_Range.pdf. Colorado Parks and Wildlife (CPW). 2016a. Brassy Minnow—Factsheet and Habitat Scorecard. https://cpw.state.co.us/Documents/LandWater/WetlandsProgram/PrioritySpecies/Factsheet-and- Habitat-Scorecard_BrassyMinnow.pdf. Last accessed January. Colorado Parks and Wildlife (CPW). 2016b. Short -Eared Owl—Factsheet and Habitat Scorecard. https://cpw.state.co.us/Documents/LandWater/'WetlandsProgram/PrioritySpecies/Factsheet-and- Habitat-Scorecard_ShortEaredla20Owl.pdf. January. Colorado Parks and Wildlife (CPW). 2017. Greater Prairie -chicken. https://cpw.state.co.us/learn/Lists/Wildlife%2OSpecies/DispForm.aspx?ID=x.15. August 3. Colorado Parks and Wildlife (CPW). 2020a. CPW Wildlife Shapefile Download. From: Species Activity Mapping (SAM). Redlands, CA: ESRI. ERO Project #5241 38 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado http://www.arcgis.com/home/grou p.htm l?owner=rsacco&title=Colorado%20Parks% 20and %2OWildlif e %20-%205peci es %2OActivity%20Data . Colorado Parks and Wildlife (CPW). 2020b. Raptor Nest Database provided to ERO Resources Corporation under Non -disclosure Agreement to keep nest location information confidential. Colorado Parks and Wildlife (CPW). 2020c. Maps Library. http://cpw.state.co.us/learn/Pages/Maps.aspx/. Last accessed January 14, 2021. Colorado Parks and Wildlife (CPW). 2020d. Recommended buffer zone and seasonal restrictions for Colorado Raptors. May. Colorado Parks and Wildlife (CPW). 2021a. Species Profiles. http://cpw.state.co.us/learn/Pages/SpeciesProfiles.aspx. Colorado Parks and Wildlife (CPW). 2021b. Colorado listing of endangered, threatened and wildlife species of special concern. http://cpw.state.co.us/learn/Pages/SOC-ThreatenedEndangeredList.aspx. Cornell Lab of Ornithology. 2021. Black -Necked Stilt. All About Birds. Cornell University. https://www.allaboutbirds.org/guide/Black-necked_Stilt/lifehistory. Last accessed January 14, 2021. Craig, G.F. and J.H. Enderson. 2004. Peregrine Falcon Biology and Management in Colorado. Colorado Division of Wildlife Technical Publication No. 43. Decker, K. 2006. Asclepias uncialis Greene (wheel milkweed): a technical conservation assessment. USDA Forest Service/ Rocky Mountain Region. http://www.fs.fed.us/r2/projects/scp/ assessments/asclepiasuncialis.pdf. April 24. Environmental Science and Engineering. 1988. Bald Eagle Study Winters 1986-1987, 1987-1988 Final Report. Prepared for the Office of the Program Manager, Rocky Mountain Arsenal Contamination Cleanup. ERO Resources Corporation (ERO). 2OO2a. Trapping survey results submitted to U.S. Fish and Wildlife Service at Riverbend Estes along Little Thompson River in Weld County. ERO Resources Corporation (ERO). 2002b. Trapping survey results submitted to U.S. Fish and Wildlife Service south of Johnstown along Little Thompson River in Weld County. ERO Resources Corporation (ERO). 2O19. Raptor survey in Weld County. ERO Resources Corporation (ERO). 2O20. Raptor survey in Weld County. Fitzgerald/ J.P., C.A. Meaney, and D.M. Armstrong. 1994. Mammals of Colorado. University Press of Colorado and Denver Museum of Natural History. Gillihan, S.C. and S.W. Hutchings. 2000. Best management practices for shortgrass prairie birds: a landowner's guide. Rocky Mountain Bird Observatory. Brighton, CO. Hammerson, G.A. 1999. Amphibians and reptiles in Colorado. 2nd ed. Niwot, Colo.: [Colorado]: University Press of Colorado. Haug, E.A. and L.W. Oliphant. 1990. Movements/ activity patterns/ and habitat use of burrowing owls in Saskatchewan. Journal of Wildlife Management 54:27-35. Hill, D.P. and L.K. Gould. 1997. Chestnut -collared Longspur (calcarius ornatus). The birds of North America. Number 288. ERO Project #5241 39 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Hillman, C.N. and J.C. Sharp. 1978. Return of swift fox to northern Great Plains. Proceedings of South Dakota Academy of Science 57:154-162. Johnsgard, P.A. 1993. Cormorants, Darters, and Pelicans of the World. Smithsonian Institution Press, Washington and London. Kilgore, D.L., Jr. 1969. An ecological study of swift fox (Vulpes uelox) in Oklahoma Panhandle. American Midland Naturalist 81:512-534. Kingery, H.E. 1998. Colorado Breeding Bird Atlas. Colorado Breeding Bird Atlas Partnership and Colorado Division of Wildlife. Knopf, F.L. and M.B. Wunder. 2006. Mountain Plover (Charadrius montanus). The Birds of North America Online (A. Poole, ed.). Ithaca: Cornell Lab of Ornithology. http://bna.birds.cornell .edu/bna/species/211. Kuford, C.C. 1958. Prairie dogs, whitefaces, and blue grama. Wildlife Monograph 1-78. Martell, M. 1992. Bald Eagle Winter Management Guidelines. USFWS, Reg. 3, Minneapolis, MN. McDonald, D., N.M. Korfanta, and S.J. Lantz. 2004. The burrowing owl (Athene cunicularia): a technical conservation assessment. USDA Forest Service, Rocky Mountain Region. http://www.fs.fed.us/r2/projects/scp/assessments/burrowi ngowl.pdf. Meaney, C.A., A. Deans, N.W. Clippenger, M. Rider, N. Daly, and M. O'Shea -Stone. 1997. Third year survey for Preble's meadow jumping mouse (Zapus hudsonius preblei) in Colorado. Under contract to Colorado Division of Wildlife. Boulder, CO. NatureServe Explorer. 2021. American White Pelican. https://explorer.natureserve.org/Taxon/ELEM ENT_GLOBA►L.2.102798/Pelecanus_erythrorhynchos. January 8. NatureServe. 2021. Colorado Watercress Comprehensive Report. http://explorer.natureserve.org/servlet/NatureServe?sea rch Na me=Rorippa+coloradensis. Nelson, D.L. 1998. Long -Billed Curlew. Pp. 182-183 in Colorado Breeding Bird Atlas (H.E. Kingery, ed.). Colorado Bird Atlas Partnership and Colorado Division of Wildlife, Denver, CO. Opler, Dr. P.A. and Dr. B.C. Kondratieff. 1997. Status of special concern or sensitive species of Colorado► Lepidoptera and aquatic insects. Completion report to Colorado Natural Areas Program, contract 530-854. Peterson, J. 2001. Trapping survey results submitted to U.S. Fish and Wildlife Service at the Stanford RE Property at Interstate -25 along Big Thompson River in Larimer County. Platania, S.P. 1990. lchthyofauna of four irrigation canals in the Fort Collins region of the Cache la Poudre River valley. M.S. thesis, Colorado State Univ., Ft. Collins. Platania, S.P., T.R. Cummings, and I.J. Kehmeier. 1986. First verified record of the stonecat (Noturus flavus (Ictularidae) in the South Platte River system, Colorado, with special notes on an albinistic n istic specimen. The Southwestern Naturalist, Vol. 31, pp. 553-555. Power, M.E., D. Tilman, J.A. Estes, B.A. Menge, W.T. Bond, L.S. Mills, G. Daily, J.C. Castilla, J. Lutchonco, and R.T. Paine. 1996. Challenges in the Quest for Keystone Species. BioScience 46:609-620. ERO Project #5241 40 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas ►+'eld County, Colorado Preston, C.R. 1998. Ferruginous Hawk. in Kingery, H. E. (ed.). Colorado Breeding Bird Atlas. Colorado Bird Atlas Partnership and Colorado Division of Wildlife, Denver. Preston, C.R. and R.D. Beane. 1996. Occurrence and distribution of diurnal raptors in relation to human activity and other factors at Rocky Mountain Arsenal, Colorado. Pp. 365-374 in D.M. Bird, D.E. Varland, and J.J. Negro (eds.). Raptors in human landscapes. Academic Press, London. Robb, L.A. and M.A. Schroeder. 2005. Lesser Prairie -chicken (Tympanuchus pallldicinctus): a technical conservation assessment. USDA Forest Service, Rocky Mountain Region. http:// www.fs.fed.us/r2/projectsiscp/assessments/lesserprairiechicken.pdf. Sawyer, H. and F. Lindzey. 2000. Jackson Hole Pronghorn Study. Wyoming Cooperative Fish and Wildlife Research Unit, Laramie, WY. Schroeder, M.A. and C.E. Braun. 1992. Seasonal movement and habitat use by greater prairie -chickens in northeastern Colorado. Colorado Division of Wildlife, Special Report Number 68. Sharps, J.C. and D.W. Uresk. 1990. Ecological review of black -tailed prairie dogs and associated species in western South Dakota. The GreatBasin Naturalist 50:339-345. Smith, R.E. 1967. Natural History of the Prairie Dog in Kansas. University of Kansas Museum of Natural History Misc. Publication No. 49. Spackman, S., B. Jennings, J. Coles, C. Dawson/ M. Minton/ A. Kratz, and C. Spurrier. 1997. Colorado Rare Plant Field Guide. Prepared for the Bureau of Land Management, the U.S. Forest Service, and the U.S. Fish and Wildlife Service by the Colorado Natural Heritage Program. Tannerfeldt, M., A. Moehrenschlager, and A. Angerbjorn. 2003. Den ecology of swift, kit, and arctic fox. In The swift fox: ecology and conservation of swift foxes in a changing world (Sovada, M.A., and L. Carbyn (eds.)). Canadian Plains Research Center, Saskatchewan, Canada. U .S. Army Corps of Engineers (Corps). 2018. Approved Jurisdictional Determination, Thornton Water Project. Corps File No. NWO-2018-00759-DEN. U .S. Army Corps of Engineers (Corps). 2019a. Approved Jurisdictional Determination, Thornton Water Project. Corps File No. NWO-2019-02108-DEN. U .S. Army Corps of Engineers (Corps). 2019b. Approved Jurisdictional Determination, Thornton Water Project. Corps File No. NWO-2019-00835-DEN. U .S. Army Corps of Engineers (Corps). 2020. Approved Jurisdictional Determination, Thornton Water Project. Corps File No. NWO-2018-00759-DEN. U .S. Fish and Wildlife Service (Service). 1984. American peregrine falcon recovery plan (Rocky Mountain/Southwest population). Prepared in cooperation with the American Peregrine Falcon Recovery Team, U.S. Fish and Wildlife Service, Denver, CO. U .S. Fish and Wildlife Service (Service). 1992a. Endangered and Threatened Wildlife and Plants: Final Rule to List the Plant Spiranthes diluvialis (Ute Ladies' -tresses) as a Threatened Species. Federal Register SO CFR Part 17, Vol. 57, No. 12, pp. 2048-2054. January 17. U.S. Fish and Wildlife Service (Service). 1992b. Interim Survey Requirements for Spiranthes diluvialis. U.S. Fish and Wildlife Service (Service). 1999. Survey Guidelines for Preble's Meadow Jumping Mouse. USFWS, Colorado Field Office. Revised: April 2004. ERO Project #5241 41 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas ►+'eld County, Colorado U .S. Fish and Wildlife Service (Service). 2003. Migratory Bird Permit Memorandum. April 15. U .S. Fish and Wildlife Service (Service). 2004. Endangered and Threatened Wildlife and Plants: Designated Critical Habitat for Colorado butterfly plant, Proposed Rule. Federal Register, Vol. 79, No. 151. August 6. U.S. Fish and Wildlife Service (Service). 2009. Black -footed ferret; Colorado statewide block clearance map. https://www.fws.gov/mountain-prairie/es/species/mammals/blackfootedferret/. U .S. Fish and Wildlife Service (Service). 2014. Preble's Meadow Jumping Mouse. Endangered Species Mountain -Prairie Region. https://www.fws.gov/mountain- prairie/es/preblesMeadowJ u mpingMouse.php. U .S. Fish and Wildlife Service (Service). 2021. Endangered, Threatened, Proposed and Candidate Species, Colorado Counties. http://ecos.fws.gov/i pac/wizard/cho►oseLocation 1prepa reaction. U.S. Forest Service (USFS). 1997. Final environmental impact statement for Arapaho and Roosevelt National Forests and Pawnee National Grasslands. Fort Collins, CO. U .S. Forest Service (USFS). n.d. Region 2 Sensitive Species Evaluation Form. USDA -Forest Service. http://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5295284.pdf. Last accessed January 14, 2021. U.S. Geological Survey (USGS). 2007. Aquatic Communities and Selected Water Chemistry in St. Vrain Creek near the City of Longmont, Colorado, Wastewater Treatment Plant, 2005 and 2006. Data Service 253. https://pubs.usgs.gov/ds/2007/253/pdf/ds_253.pdf. Wicker, A.D. and J.K. Detling. 1988. Ecological consequences of prairie dog disturbances. Bio.science 38:778-785. Witmer, G.W., K.C. VerCauteren, K.M. Manci, and D.M. Dees. 2002. Urban -suburban prairie dog management opportunities and challenges. Proceedings of 19th Vertebrate Pest Conference 19:439- 444. Woodling, J. 1985. Colorado's Little Fish: A Guide to the Minnows and Other Lesser Known Fishes in the State of Colorado. Colorado Division of Wildlife, Denver, CO. http://www.nativefishlab.net/library►/textpdf/20824.pdf. June. ERO Project #5241 42 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas ►+'eld County, Colorado Appendix A Photo Log ERO Project #5241 A-1 ERO Resources Corporation NATURAL AND CULTURAL RESOURCES ASSESSMENT THORNTON WATER PROJECT - WELD COUNTY PERMIT AREAS WELD COUNTY, COLORADO 2016 THROUGH 2020 SITE VISITS .fr Jd"f^t11� f,'.' i.'/'1�yyy1,1 a! -:::4j y 'a 1, '...1111 .ss t , r11 1 I -Si ;°:11)r. 9' 1 ip r it tktsi rro f- 1 1 A Ir7 SA r 9 �I V !r , I. r ti 1 1 I ii I i. � L�.�IIJI ii ��x ti ir,l l''$C'�.� .46,4,ii. .'11rr �(rJ�ylyl lx Ii , "I i ' rR.i11 I I pi' ',pistil" u I -1 �' 1'• t li ' y. 11 h II ti Irr I ^�1 lr it.tl r1.. 11.�d1!r tti��!'I ��'I yy �( �I AA*77 r fif I.kle'' �P • II�I�t,'Y�{. �+ M ,�pr,�,ul\II�I Iti�"I"� IL �� • ..'r'It T I�t��,W� e,104 ?. , Ifs . is I b _ i • .1r 'M 1 r. • r �I • d,.'f V •• ,.Pr1 p • l ! 1'r: / i 9 11 •�1 . r ..I r 'Pr �.j Mt`' Ily�1- NATURAL AND CULTURAL RESOURCES ASSESSMENT THORNTON WATER PROJECT - WELD COUNTY PERMIT AREAS WELD COUNTY, COLORADO 2016 THROUGH 2020 SITE VISITS 70; trOs— . s— •.., s--�.-- ,r. Photo 3 - View to the southeast, representative riparian community adjacent to the Little Thompson River. Photo 4 - View to the northwest, wetlands along Diamond Reservoir, representative wetland community abutting an open water pond. NATURAL AND CULTURAL RESOURCES ASSESSMENT THORNTON WATER PROJECT - WELD COUNTY PERMIT AREAS WELD COUNTY, COLORADO 2016 THROUGH 2020 SITE VISITS Photo 5 - View to the west, potential Preble's meadow jumping mouse habitat adjacent to the Cache la Poudre River. NATURAL AND CULTURAL RESOURCES ASSESSMENT THORNTON WATER PROJECT - WELD COUNTY PERMIT AREAS WELD COUNTY, COLORADO 2016 THROUGH 2020 SITE VISITS Photo 7 - View to the northeast, representative mixed upland community adjacent to the Big Thompson River. -I Photo 8 - View to the east, representative nonnative upland community. NATURAL AND CULTURAL RESOURCES ASSESSMENT THORNTON WATER PROJECT - WELD COUNTY PERMIT AREAS WELD COUNTY, COLORADO 2016 THROUGH 2020 SITE VISITS Photo 10 - View to the south, representative developed/disturbed area. NATURAL AND CULTURAL RESOURCES ASSESSMENT THORNTON WATER PROJECT - WELD COUNTY PERMIT AREAS WELD COUNTY, COLORADO 2016 THROUGH 2020 SITE VISITS Photo 11- View to the east, potential Ute ladies` -tresses orchid and Colorado butterfly plant habitat adjacent to the Big Thompson River. Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Appendix B Summary of Water Features in the TWP Study Buffer and Work Limits Wetland / Drainage Name ID Proximity RPW, Isolated, to TNW, or Non -(Work RPW Site Description Jurisdictional Status Acres Unincorporated Weld Limits/TWP Study (Work County in Incorporated Acres Weld Limits/TWP Buffer) Study County in Acreage Buffer) Total (Work Study Latitude Longitude Figure Number(s) Buffer) Big Dry Creek A perennial the (TNW) creek that South tributary Platte is a to River 20 -foot creek -wide Jurisdictional (NWO-2018- 00759 -DEN) 0.06/1.38 0/0 0.06/1.38 40.0165001 -104.9045118 3.02, 3.03 Big Thompson River A river (TNW) flows to the Platte River that South (TNW). 18- to 22- foot -wide river jurisdictional waters Known of the U.S. 0.05/2.34 0/0 0.05/2.34 40.38132458 -104.935396 140 Bull Ditch A concrete that uplands Road -lined terminates east 21. of ditch in County Concrete ditch foot open with -wide water 2- Nonjurisdictional (NWO-2019- 02108 -DEN) 0/0.05 0/0 0/0.05 40.05040476 -104.9054259 3.06 Cache Poudre River la A river flows to Platte (TNW) the River South (TNW) that 20- to 25- foot -wide river jurisdictional waters Known of the U.S. 0/0 0.09/1.75 0.09/1.75 40.4724809 -104.9421871 3.49 Coalridge Ditch A ditch to Reservoir, connects flowing Platte Coalridge that to River which to the (TNW). connects Waste a ditch South 10- to 15- foot -wide ditch Nonjurisdictional (NWO-2019- 02108 -DEN) 0.22/3.39 0/0.89 0.22/4.27 40.14546094 -104.9043761 3.13, 3.14, 3.15, 3.16 Cowan Lateral Cactus Lateral Ditch aka Hill A ditch dissipate uplands Highway County that Road in the north 14 appears and 17. of to State 3- to 5 wide ditch -foot - Nonjurisdictional (NWO-2019- 02108 -DEN) 0/0.3 0/0 0/0.3 40.6326089 -104.9400906 3.64 Diamond Reservoir A an drainage the (TNW). pond that unnamed South connecting Platte drains into perennial to River open pond water Jurisdictional (NWO-2018- 00759 -DEN) 0/3.4 0/0 0/3.4 40.22840628 -104.9127673 3.23, 3.24 ERO Project #5241 B-1 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland / Drainage Name ID RPW, Proximity Isolated, to RPW TNW, or Non - Site Description Jurisdictional Status Acres Unincorporated Weld (Work Limits/TWP Study County Buffer) in Incorporated Acres Weld (Work Limits/TWP Buffer) Study County in Acreage Limits/TWP Buffer) (W Study Total LatitudeLongitude Number(s)Figure Number(s) Farmer's Ditch A ditch water Thompson and Reservoir outlet waters connects that diverts from the River with to any of the Big (TNW) to Koenig no known U.S. 4 ditch -feat -wide Nonjurisdictional (NWO-2019- 02108 -DEN) 0.01/0.55 0/0 0.01/0.55 40.39976383 -104.9342974 3.42, 3.43 Farmer's Extension Ditch An irrigation terminates agricultural southeast intersection Roads 40 in of and land ditch that the of County 17. 15 concrete channel open -foot water -wide with Nonjurisdictional (NWO-2019- 02108 -DEN) 0.01/0.05 0/0.05 0.01/0.1 40.28201396 -104.9154077 3.28, 3.29 German Reservoir No 12 intermittent A to which Dry Creek). W38 pond an unnamed Creek (see that connects Connection connects drainage, (see W38). to Big Big Dry to Open pond water Jurisdictional (NWO-2018- 00759 -DEN) 0/0.68 0/0 0/0.68 40.00860998 -104.9069349 3.02 Greeley 2 Canal No. A the which irrigated No. water private reservoirs outlet U.S. canal North 2 Canal to that terminates irrigation to Side field; several that waters flows supplies Lateral, Greeley do of to in an not the 12 -foot canal -wide determined Nonjurisdictional (NWO-2019- 02108 Jurisdictional (NWO-2018- 00759 Portions -DEN) -DEN) and 0.03/0.27 0/0 0.03/0.27 40.48827608 -104.9432175 3.5 ERO Project #5241 B-2 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland Drainage ID RP Name RPW, Proximity W, Isolated, to TNW, or Non- Site Description Jurisdictional Status Acres Unincorporated Weld (Work Limits/TW Study County Buffer) in P Incorporated Acres Weld County Limits/TWP Study Buffer) in Acreage (Work Limits/TWP Study Buffer) Total Figure Number(s) Hill Brush and Ditch A southeast and the River ditch returns Big (TNW). that Thompson flows and receives flows to 4 ditch -foot -wide Nonjurisdictional (NWO-2019- 02108 -DEN) 0.01/0.22 0/0 0.01/0.22 40.38254505 -104.9360449 3.40 Hillsboro Ditch A ditch in south that agricultural of Milliken. terminates uplands 6 ditch -foot -wide Nonjurisdictional (NWO-2019- 02108 -DEN) 0.02/0.51 0..04/0.88 0.06/1.38 40.32012982 -104.928357 3.31, 3.32, 3.33, 3.34, 3.38 Home Supply Ditch An that uplands Road intermittent terminates 13. ditch in east of County 3 -foot -wide ditch Determination yet completed to be 0/0 0/0.02 0/0.02 40.33757839 -104.9428291 3.25 Koening Reservoir A receives the reservoir that water Farmer's from Ditch. Open water reservoir Determination yet completed to be 0.27/11.91 0/0 0.27/11.91 40.39312574 -104.9325653 3.42 Lake Canal A canal to the Canal 2 Canal). (see that Greeley connects No. Greeley 2 No. 10- to foot -wide canal 15- dry Nonjurisdictional (NWO-2019- 02108 -DEN) 0/0.03 0.01/0.02 0.01/0.05 40.51876365 -104.9428788 3.53 Lorimer Weld aka Canal and Canal Eaton A to which Creek, Lone flows Platte canal the Tree to that Eaton flows which River Creek, the connects to South (TNW). Ditch, Owl flows which to 10 -foot canal -wide (NWO-2019- 02108 -DEN) 0.02/0.48 0/0 0.02/0.48 40.56264821 -104.9428494 3.57 ERO Project #5241 B-3 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland / Drainage ID RPW, Name RPW, Proximity Isolated, to TNW, or Non- Site Description Jurisdictional Status Acres Unincorporated Weld (Work Limits/TW Study County Buffer) in P Incorporated Acres Weld County Limits/TWP Study Buffer) in Acreage (Work Limits/TWP Study Buffer) Total Figure Number(s) Larimer County Canal irrigation A to Reservoir Pierce Pierce terminates east Black releases County connects Lateral to Lateral terminates canal Black the of that Lateral; Lateral Pierce; Hollow Canal which Lone which Hollow and reservoir to to at the on connects the a Reservoir which the connects Tree the the Larimer farms. private Collins 30 -foot canal wide Nonjurisdictional (NWO-2019- 02108 -DEN) 0.13/1.22 0/0 0.13/1.22 40.5988453 -104.9386942 3.60, 3.61 Last Ditch Chance A ditch to (TNW). St. that Frain connects Creek 10 ditch -foot -wide Nonjurisdictional (NWO-2019- 02108 -DEN) 0.02/0.46 0/0 0.02/0.46 40.19914718 -104.9049833 3.19, 3.20 Lateral Loveland and Greeley Canal from A flows Draw flows Platte canal into (RPW), to that River possibly Ashcroft which the South (TNW). 1O -fiat canal -wide Nonjurisdictional (NWO-2019- 02108 -DEN) 0/0 0/0.34 0/0.34 40.40741147 -104.9378357 3.43 Little Creek ter y A connects Platte creek (RPW) to the River (TNW). that South Perennial drainage Known jurisdictional waters of the • Q.J.S. 0.04/0.71 0/0 0.04/0.71 40.06932575 -104.9050698 3.07, 3:08 Little Thompson River A Thompson (TNW), the (TNW). tributary South which to River Platte the flows Big to River 13 -foot river -wide Known jurisdictional waters of the Q.J.S. 0/0.11 0.03/0.19 0.03/0.3 40.31552407 -104.9243307 3.32, 3.33 ERO Project #5241 B-4 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland / Drainage Name ID RPW, Proximity Isolated, to RPW TNW, or Non- Site Description Jurisdictional Status Acres Unincorporated Weld (Work Limits/TWP Study County Buffer) in Incorporated Acres Weld County (Work Limits/TWP Study Buffer) in Acreage (Work Limits/TWP Study Buffer) Total Latitude Longitude Figure Number(s) Loveland and Greeley Canal A canal that flows into Draw (RPW), flows to Platte River the Ashcroft possibly which South (TNW). 10 -foot canal -wide Nonjurisdictional (NWO-2019- 02108 -DEN) . 0/1.190.09/1.07 0.09/2.26 40.40552948 -104.9357457 3.43 Lupton Bottom Ditch intersection A ditch water Platte flows northwest terminates agricultural southeast Roads that from River 26 and in of receives the (TNW) land the of South and and County 15. 6 ditch -foot -wide Nonjurisdictional (NWO-2019- 02108 -DEN) 0/0.24 0.02/0.18 0.02/0.42 40.17435131 -104.9043949 3.17, 3.18 Oklahoma Reservoir A receives the Greeley flows Oklahoma an terminates East reservoir irrigation that water Loveland Canal; from the Reservoir ditch north County Road and from water that of 62 to Open reservoir water Determination yet to completed be 0.68/15.52 0/00.68/15.52 40.42549377 -104.9428244 3.45 St. Vrain Creek A creek (TNW) connects to the Platte River (TNW) that South 50- to 200- foot -wide creek Jurisdictional (NWO-2018- O0759 -DEN) 0.21/3.62 0/0 0.21/3.62 40.20507685 -104.906722 3.20, 3.21 Stanley Ditch lined A non-RPW connects Ditch Ditch). ditch (see that to Coal concrete Coalridge - Ridge lined Dry concrete- ditch Nonjurisdictional (NW 02108 -2019- -DEN) 0/0.06 0/0 0/0.07 40.10154525 -104.9052808 3.10, 3.11 ERO Project #5241 B-5 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland / Drainage ID RPW, Name RPW, Proximity Isolated, to TNW, Site Description Jurisdictional Status Acres Unincorporated Weld (Work Limits/TW Study County Buffer) in or Non- (fork Latitude Longitude P Incorporated Acres Weld County Limits/TWP Study Buffer) in Acreage (Work Limits/TUI�►P Study Buffer) Total Figure Number(s) Stanley Lateral Ditch lined A non-RPW terminates east ditch of County that in concrete uplands Road 21 lined Dry concrete - ditch Nonjurisdictional (NWT, 02108 -20'19- -DEN) 0/0 0/0.08 0/0.08 40.09072212 -104.9047872 3.09, 3.10 Thompson Ditch A to Reservoir terminates North (RPW). ditch the that Thompson Star connects and in Reservoir the 6 -foot ditch -wide Nonjurisdictional (NWO-2019- 02108 -DEN) 0.01/0.16 0/0 0.01/0.16 40.02807113 -104.9048044 3.03, 3.04 Unnamed Lateral Last Ditch Chance from An terminates agricultural of irrigation County ditch in land Road that south 28. Dry ditch water concrete with no Nonjurisdictional (NWO-2019- 02108 -DEN) 0.01/0.07 0/0 0.01/0.07 40.18179832 -104.903916 3.18 Unnamed Ditch 4 A uplands County no the ditch outlet U.S. terminating north Road to 40 waters of East with in of 2 dry -foot ditch -wide Nonjurisdictional (NWO-2019- 02108 -DEN) 0/0 0.01/0.19 0.01/0.19 40.53780501 -104.9452129 3.55 Unnamed Ditch 7 An unnamed concrete terminates agricultural of County with no outlet waters of ditch the in land Road dry to U.S. that west 17 Dry ditch concrete Nonjurisdictional (NW'O-2019- 02108 -DEN) 0/0.08 0/0 0/0.08 40.21384254 -104.915394 3.22 Unnamed Ditch 11 Ditch Last Last that Chance Chance connects Ditch Ditch) to (see 2 -foot ditch -wide Nonjurisdictional (NWO-2019- 00835 -DEN) 0.03/0.09 0/0.12 0.03/0.2 40.19302822 -104.9045188 3.18, 3.19, 3.20 ERO Project #5241 B-6 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland / Drainage Name ID RPW, Proximity Isolated, to RPW TNW, or Non- Site Descripton Jurisdictional Status Acres Unincorporated Weld (Work Limits/TWP Study County Buffer) in Incorporated Acres Weld Limits/TWP Buffer) Study County in Acreage Limts/TWP Buffer) (Work Study Total Figure Number(s) Unnamed Drainage 1 An intermittent that Hillsboro Hillsboro unnamed connects Ditch Ditch). drainage to the (see 5 -foot open -wide water Determination yet to completed be 0.01/0.1 0/0 0.01/0.1 40.29099006 -104.9154785 3.29 Unnamed Drainage 2 An unnamed intermittent drainage. Upland Vegetated ditch; dry intermittent wetlands mostly with Jurisdictional (NWO-2018- 00759 -DEN) 0/0.05 0/0 0/0.05 40.00309636 -104.9033066 3.01 Unnamed Drainage 7 An intermittent that unnamed drainage connects Thompson (TNW). unnamed connects ditch, to intermittent the River drainage to an which Big 4 -foot ditch -wide Determination yet to completed be 0.02/0.28 0/0 0.02/0.28 40.34912825 -104.9377755 3.36, 3.37 Unnamed Pond 5 A the which dissipate (no connection of pond hydrologic the Unnamed appears U.S.) that drains into to . Ditch to uplands a water to 3, Open p water and Determination yet completed to be 0/2.91 0/0 0/2.91 40.61396982 -104.9409855 3.62 Unnamed Pond 7 An no the isolated outlet U.S. to pond with waters of Artificially constructed pond open with water Determination yet completed to be 0/ 0/0.44 0/0.44 40.52328334 -104.9437478 3.53, 3.54 ERO Project #5241 B-7 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland Drainage ID RP Name RPW, Proximity W, Isolated, to TNW, or Non- Site Description Jurisdictional Status Acres Unincorporated Weld (Work Limits/TWP Study County Buffer) in Incorporated Acres Weld County Limits/TWP Study Buffer) in Acreage (Work Limits/TWP Study Buffer) Total Figure Number(s) Unnamed Pond 8 An isolated pond waters with of the gravel no outlet U.S. to Artificially constructed pond open with water Determination yet completed to be 0/0 0/0.1 0/0.1 40.52251457 -104.9438052 3.53 Unnamed Pond 11 An isolated pond waters with of the gravel no outlet U.S. to Artificially constructed pond open with water Determination yet to completed be 0/7.48 0/0 0/7.48 40.4820012 -104.9432098 3.5 Unnamed Pond 13 A to (TNW). gravel the Poudre pond adjacent River Artificially constructed pond with open water Determination yet completed to be 0/0 0/3.72 0/3.72 40.47448087 -104.9422570 3.49 Unnamed Pond 19 An no the isolated outlet U.S. to pond waters with of Artificially constructed pond open with water Determination yet to completed be 0/0.3 0/0 0/0.3 40.29840867 -104.9225595 3.30 Unnamed Pond 20 An isolated no outlet the U.S. to pond with waters of Artificially constructed pond open with water Nonjurisdictional (NWO-2018- 00759 -DEN) 0/0 0/1.12 0/1.12 40.2827438 -104.9134755 3.28, 3.29 Unnamed Pond 21 An no the isolated outlet U.S. pond to waters with of Artificially constructed pond open with water Nonjurisdictional (NWO-2018- 00759 -DEN) 0/1.79 0/0 0/1.79 40.25418797 -104.9143567 3.26 Unnamed Pond 24 An isolated pond waters with of the gravel no outlet U.S. to Artificially constructed pond open with water Nonjurisdictional (NWO-2018- 00759 -DEN) 0/2.40 0/0 0/2.46 40.19798956 -104.9062586 3.19, 3.20 Unnamed Pond 25 An isolated pond waters with of the gravel no outlet U.S. to Artificially constructed pond open with water Determination yet to completed be 0/0.4 0/0 0/0.4 40.19597724 -104.904024 3.19, 3.20 ERO Project #5241 B-8 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland Drainage ID RP Name RPW, Proximity W, Isolated, to TNW, or Non- Site Description Jurisdictional Status Acres Unincorporated Weld (Work Limits/TWP Study County Buffer) in Incorporated Acres Weld County Limits/TWP Study Buffer) in Acreage (Work Limits/TWP Study Buffer) Total Figure Number(s) Unnamed Pond 26 An isolated pond waters with of the gravel no outlet U.S. to Artificially constructed pond open with water Determination yet completed to be 0/2.49 0/0 0/2.49 40.19590688 -104.9032333 3.19, 3.20 Unnamed Pond 27 An isolated pond waters with of the gravel no outlet U.S. to Artificially constructed pond open with water Determination yet to completed be 0/6.23 0/0 0/6.23 40.19428827 -104.9034168 3.19 Unnamed Pond 28 An no the isolated outlet U.S. pond with to waters of Artificially constructed pond with open water Nonjurisdictional (NWO-2018- 00759 -DEN) 0/ 0/0.39 0/0.39 40.18383504 -104.9049276 3.18 Unnamed Pond 30 An no the isolated outlet U.S. to pond waters with of Artificially constructed pond open with water Nonjurisdictional (NWO-2018- 00759 -DEN) 010.05 0/0 0/0.05 40.160711 -104.9051774 3.16 Unnamed Pond 32 An isolated no outlet the U.S. to pond with waters of Artificially constructed pond open with water Nonjurisdictional (NWO-2018- 00759 -DEN) 0/0.89 0/0 0/0.89 40.04843013 -104.9067105 3.05, 3.06 Unnamed Pond 33 Ain no the isolated outlet U.S. pond to waters with of Artificially constructed pond open with water Nonjurisdictional (NWO-2018- 00759 -DEN) 0/0.43 0/0 0/0.43 40.04755091 -104.9072567 3.05, 3.06 Unnamed Pond 34 An isolated no outlet the U.S. to pond with waters of Artificially constructed pond open with water Nonjurisdictional (NWO-2018- 00759 -DEN) 0/0.14 0/0 0/0.14 40.04717746 -104.9035917 3.05 Unnamed Pond 35 An no the isolated outlet U.S. to pond waters with of Artificially constructed pond open with water Nonjurisdictional (NOW 00759 -2018- -DEN) 0.15/ 0/0 0.15/0 40.04605707 -104.905356 3.05 ERO Project #5241 B-9 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland Drainage ID RP Name RPW, Proximity W, Isolated, to TNW, or Non- Site Description Jurisdictional Status Acres Unincorporated Weld (Work Limits/TWP Study County Buffer) in Incorporated Acres Weld County Limits/TWP Study Buffer) in Acreage (Work Limits/TWP Study Buffer) Total Figure Number(s) Unnamed Pond 36 An irrigation connects Pond Pond to Unnamed 38 (see 38). pond that Unnamed Open pond water Nonjurisdictional (NWO-2018- 00759 -DEN) 0.09/1.42 0/0 0.09/1.42 40.04003454 -104.9039911 3.05 Unnamed Pond 37 An connects unnamed drainage, dissipates east with connection waters irrigation of County no apparent of to intermittent which into the an to pond uplands Road known U.S. that 17 Open pond water Nonjurisdictional (NWO-2018- 00759 -DEN) 0/0.94 0/0 0/0.94 40.04011317 -104.9030374 3.03 Unnamed Pond 38 A connection Thompson Thompson pond with a possible to the Ditch Ditch). (see Open pond water Nonjurisdictional (NWO-2018- O0759 -DEN) 0/5.53 0/0 0/5.53 40.02800919 -104.9036519 3.03, 3.04 Unnamed Pond 71 An no the isolated outlet U.S. to pond with waters of Artificially constructed pond open with water Determination yet to completed be 0/0.34 0/0 0/0.34 40.62816074 -104.9375913 3.63, 3.64 Unnamed Pond 72 no the isolated outlet U.S. to and pond waters with of Artificially constructed pond open with water Determination yet to completed be 0/5.49 0/0 0/5.49 40.37638323 -104.937461 3.39 Unnamed Pond 73 no the isolated outlet U.S. to and with pond waters of Artificially constructed pond open with water Determination yet completed to be 0/6.98 0/0 0/6.98 40.37586514 -104.9348357 3.39 Unnamed Pond 74 An no the isolated outlet U.S. to pond waters with of Artificially constructed pond open withyet water Determination to completed be 0/2.42 0/0 0/2.42 40.37384209 -104.9378482 3.39 ERO Project #5241 B-10 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland / Drainage Name ID RPW, Proximity Isolated? to RPW TNW, Site Description Jurisdictional Status Acres Unincorporated Weld (Work Limits/TWP Study County Buffer) in or Non— (Work Latitude Longitude Incorporated Acres Weld Limits/TWP Buffer) Study County in Acreage Limits/TWP Buffer) (Work Study Total Figure Number(s) Unnamed Pond 75 An no the isolated outlet U.S. to pond waters with of Artificially constructed pond open with water Determination yet completed to be 0/2.14 0/0 0/2.14 40.34959776 -104.9382656 3.36, 3.37 Unnamed Pond 76the An no isolated outlet U.S. pond to waters with of Artificially constructed pond open with water Determination yet to completed be 0/0.47 0/0 0/0.47 40.37740274 -104.938294 3.39 Unnamed Pond 77 (see canal). A connection Timnath Timnath outflow Canal Reservoir which Greeley pond and Greeley with to connects No. Reservoir. Reservoir the the Outlet, a to 2 possible the Timnath Canal No. Lake to the 2 The has Open p water and Determination yet to completed be 0/0.28 0/0 0/0.28 40.59596249 -104.9385808 3.60 Unnamed Pond 78 A to (TNW). gravel the Poudre pond adjacent River Artificially constructed pond open with water Determination yet completed to be 0/0 0/0.59 0/0.59 40.47348391 -104.9402526 3.49 W5 A Unnamed which Unnamed which dissipate (no connection of wetland the hydrologic drains appears U.S.). that Pond Ditch into to to uplands to a abuts 5, the 3, water Cattail wetland abutting Unnamed Pond 5 Determination yet to completed be 0/1.05 0/0 0/1.05 40.61403138 -104.9406139 3.62 ERO Project #5241 B-11 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland / Drainage ID RPW, Proximity Isolated, to RPW TNW, or Non- Site Descripton Jurisdictional Status Acres Unincorporated Weld (WorkLimits/TWP Limits/TWP Study County Buffer) in Incorporated Acres Weld Buffer) 'Work Study County in Acreage Limits/TWP Buffer) (Work Study Total Latitude Longitude Figure Number(s) Number(s)Name W7 A possible the Canal, eventual the (TNW). wetland Larimer South which swale connection connection Platte and has with Weld an River a to to 3 -foot wetland swale -wide Determination yet completed to be 0/0.36 0.15/0.49 0.15/0.85 40.5946413 -104.9392169 3.59, 3.60 W8 A possible Timnath Timnath outflow Canal Reservoir which Greeley (see canal). wetland Greeley and connects with connection Reservoir. Reservoir to the the Outlet, No. 2 a Lake Timnath to Canal No. the 2 to The has dominated common threesquare and bulrush Wetland softstem by Determination yet completed to be 0/0 0.15/0 0.15/0 40.57455369 -104.9442675 3.58 W10 A possible Timnath Timnath outflow Canal Reservoir which Greeley (see canal). wetland Greeley and connects with connection Reservoir. Reservoir to the the Outlet, No. 2 No. Timnath Canal a Lake to the 2 to The has Cattail wetland Determination yet to completed be 0/1.54 0/2.08 0/3.62 40.5520905 -104.9436102 3.56 ERO Project #5241 B-12 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland / Drainage Name ID RPW, Proximity Isolated, to RPW TNW, or Non- Site Descripton Jurisdictional Status Acres Unincorporated Weld (Work Limits/TWP Study County Buffer) in Incorporated Acres Weld Limits/TWP Buffer) Study County in Acreage Limts/TWP Buffer) (Work Study Total Figure t' Number(s) W11 A Timnath Timnath outflow Canal Reservoir which Greeley (see canal). wetland Reservoir. Reservoir to and connects No. Greeley draining the the Outlet, 2 No. Lake Timnath to Canal has the 2 to The Cattail wetland Determination yet completed to be 0/0 0/4.82 0/4.82 40.54942614 -104.9440805 3.56 W12 Wetland fringe along The the Timnath connects the (see Timnath Reservoir. Reservoir outflow Canal Reservoir Outlet, No. No. Timnath Lake Greeley 2 2 and Canal Greeley canal). to which has the to Determination yet to completed be 0/0 0.01/0 0.01/0 40.54768156 -104.944812 3.56 W13 A that Unnamed which Unnamed wetland connects is isolated drainage Pond Pond to 11, (see 11) Cattail wetland Nonjurisdictional (NWO-2018- 00759 -DEN) 0.5/1.92 0/0 0.5/1.92 40.48706745 -104.943662 3.5 ERO Project #5241 B-13 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland / Drainage Name ID RPW, Proximity Isolated, to RPW TNW, or Non- Site Description Jurisdictional Status Acres Unincorporated Weld (Work Limits/TWP Study County Buffer) in Incorporated Acres Weld County (Work Limits/TWP Study Buffer) in Acreage (Work Limits/TWP Study Buffer) Total FigureLongitude Figure Number(s) W14 A wetland Unnamed which Unnamed is isolated Pond Pond adjacent 11, 11) (see to Cattail wetland abutting Unnamed Pond 11 Determination yet to completed be 0/1.78 0/0 0/1.78 40.48355724 -104.9431063 3.50 W15 A Oklahoma see Reservoir) wetland Oklahoma abutting Reservoir the Cattail wetland abutting Oklahoma Reservoir Determination yet completed to be 1.4/1.43 0/0 1.4/1.43 40.42654942 -104.9437686 3.45 W16 A wetland by a Loveland Canal and berm (see Greeley separated from and Greeley Loveland Canal) the Cattail wetland abutting Loveland Greeley the and Canal Determination yet completed to be 0/0.19 0/4.13 0/4.32 40.40832357 -104.9443654 5.4.E W18 A wetland adjacent to Unnamed Drainage 7 (see Unnamed Drainage 7) Cattail wetland Determination yet completed to be 0.06/3.56 0/0 0.06/3.56 40.34834637 -104.9392912 3.36, 3.37 W20 A wetland Unnamed see Unnamed Drainage that drainage 1) abuts 1 Wetlands abutting Unnamed Ditch 7 Determination yet to completed be 0.21/2.79 0/0 0.21/2.79 40.29087263 -104.9156437 3.29, 3.30 W22 An intermittent drainage to which ditches the (TNW) unnamed B L Swift drains connecting South that wetland connects Reservoir, into Platte two to River 10- foot cattail wetland drainage to -wide 75- Jurisdictional (NWO-2018- 00759 -DEN) 0.47/4.35 0/0 0.47/4.35 40.2452882 -104.9138371 3.25 ERO Project #5241 B-14 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland / Drainage Name ID RPW, Proximity Isolated, to RPW TNW, or Non- Site Description Jurisdictional Status Acres Unincorporated Weld (Work Limits/TWP Study County Buffer) in Incorporated Acres Weld County (Work(WorkLatitude Limits/TWP Study Buffer) in Acreage Limits/TWP Study Buffer) Total Longitude Figure Number(s) W23 that (see A wetland Diamond Reservoir) flows Diamond drainage into Reservoir the 150 wide wetland drainage -foot cattail - Jurisdictional (NWO-2018- 00759 -DEN) 0.31/2.31 0/0 0.31/2.31 40.22876951 -104.9149905 3.23; 3.24 W24 A roadside connects Creek connects Platte wetland (TNW), River within drainage to St. which to the (TNW) a Frain South that 10 cattail wetland within roadside drainage -foot -wide a Jurisdictional (NWO-2018- 00759 -DEN) 0/0.06 0/0..94 0/1.01 40.20447427 -104.9072725 3.20; 3.21 W25 A wetland St. Vrain Creek adjacent (TNW) to Cattail wetlands along 'gain St. Creek Jurisdictional (NWO-2018- x}0759 -DEN) 0/0.62 0/0 0/0.62 40.2025426 -104.9066019 3.20, 3.21 W26 A artificially depression St. wetland Vrain Creek in an created adjacent (TNW) to Wetlands within artificially created depression an Jurisdictional (NWO-2018- O0759 -DEN) 0.2/1.89 0/0 0.2/1.89 40.20363125 -104.9054504 3.20 W27 A that Vrain wetland connects Creek drainage to (TNW) St. Cattail wetland drainage Jurisdictional (NWO-2018- 00759 -DEN) 0.07/2.86 0/0 0.07/2.86 40.20491564 -104.9038365 3.20 W28 A with connection which Vrain wetland a possible connects Creek depression to (TNW) W26, to St. Cattail plains cottonwood wetlands within made depression and a man- Nonjurisdictional (NWO-2018- 00759 -DEN) 0/5.54 0/0 0/5.54 40.20277933 -104.903275 3.20 ERO Project #5241 B-15 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland / Drainage Name ID RPW, Proximity Isolated, to RPW TNW, or Non- Site Description Jurisdictional Status Acres Unincorporated Weld (Work Limits/TWP Study County Buffer) in Incorporated Acres Weld County (Work(WorkLatitude Limits/TWP Study Buffer) in Acreage Limits/TWP Study Buffer) Total Longitude Figure Number(s) W29 A wetland Last Chance which Vrain connects Creek that abuts Ditch, to (TNW) St. Cattail wetland abutting Chance Ditch Last Nonjurisdictional (NWO-2018- 00759 -DEN) 0/0.28 0/0 0/0.28 40.2004903 -104.9050854 3.20 W30 A Last which Vrain wetland Chance connects Creek that abuts Ditch, to (TNW) St. Cattail wetland abutting Chance Ditch Last Jurisdictional (NWO-2018- 00759 -DEN) 0/1.75 0/0 0/1.75 40.19934075 -104.9056732 3.20 W31 A wetland Last Chance Last Chance adjacent Ditch Ditch) to (see Cattail wetlands along Chance Last Ditch Nonjurisdictional (NWO-2018- O0759 -DEN) 0/0 0/0.53 0/0.53 40.18378764 -104.9054653 3.18 W32 A wetland with waters no outlet of the depression to U.S. Cattail depression Nonjurisdictional (NWO-2018- 0{1759 -DEN) 0/0.72 0/0 0/0.72 40.04399524 -104.9057233 3.05 W33 A wetland unnamed drainage to Unnamed and Pond Pond 37 (see 36 37) intermittent that and within Ponds Unnamed Unnamed an connects 36 Cattail Baltic wetland drainage and rush Nonjurisdictional (NWO-2018- O0759 -DEN) 0/0.73 0/0 0/0.73 40.04026723 -104.9062475 3.05 W34 A wetland Unnamed adjacent Pond to 38 Cattail wetland fringe Likely jurisdictional (abutting Unnamed 38 determined nonjurisdictional) non - Pond 0/1.63 0/0 0/1.63 40.02826055 -104.9041704 3.03, 3.04 W36 A wetland that Big Dry Creek Dry Creek) abuts (see Big Spikerush wetland abutting Dry Creek Big Jurisdictional (NWO-2018- 00759 -DEN) 0.09/0.02 0/0 0.09/0.02 40.01637019 -104.9046836 3.02, 3.03 ERO Project #5241 B-16 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland / Drainage Name ID RPW, Proximity Isolated, to RPW TNW, orNon- Site descriptonStatus(WorkLimits/TWP Jurisdictional Acres Unincorporated Weld Limits/TWP Study County Buffer) in Incorporated Acres Weld Buffer) 'Work Study County in Acreage Limits/TWP Buffer) (Work Study Total Latitude Longitude Figure Number(s) W37 A wetland Big Dry Dry Creek) Creek that abuts (see Big Cattail reed canarygrass a wetland abutting Dry and rygrass Creek Big Jurisdictional (NWO-2018- O0759 -DEN) 0/1.74 0/0 0/1.74 40.01551969 -104.9063414 3.02, 3.03 W38 intermittent An drainage to No Reservoir unnamed that German 12 (see Reservoir German No wetland connects 12) Cattail curly wetlands within intermittent drainage dock and Jurisdictional (NWO-2018- 00759 -DEN) 0/0.59 0/0 0/0.59 40.00685653 -104.9061436 3.01, 3.02 W64 A wetland connects Drainage swale that to Unnamed 1 Wetland swale Nonjurisdictional (NWO-2018- O0759 -DEN) 0/1.38 0/0 0/1.38 40.28646618 -104.9157185 3.29 W73 An isolated with no surface connection of the U.S. wetland to waters Wetland depression Determination yet completed to be 0/0 0/0.56 0/0.56 40.16441627 -104.9005896 3.16, 3.17 W75 Wetlands Poudre abutting the River 2- to wide wetlands abutting 20 -foot- river Likely jurisdictional abutting jurisdictional waters U.S. of known the 0/0 0.01/0.27 0.01/0.27 40.47235374 -104.9418819 3.49 — W76 Wetlands Big Thompson abutting the River 2- wide wetlands abutting to 20 -foot - river Known jurisdictional waters of the U.S. 0/0.03 0/0 0/0.03 40.3813695 -104.9385648 3.40 ERO Project #5241 B-17 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland / Drainage Name ID RPW, Proximity Isolated, to RPW TNW, or Non- Site Description Jurisdictional Status Acres Unincorporated Weld (Work Limits/TWP Study County Buffer) in Incorporated Acres Weld Limits/TWP Buffer) 'Work Study County in Acreage Limits/TWP Buffer) Total (Work Study Latitude Longitude Figure Number(s) W84 into A wetland connection unnamed appears hydrologic to a uplands water that to ditch to dissipate connection of (no the an has a that U.S.) Wetland swale Determination yet completed to be 0/1.89 0/0 0/1.89 40.59734316 -104.9376437 3.60, 3.61 W85 Big (TNW) wetland Thompson adjacent to River WetlandsA along Thompson River Big jurisdictional waters Known of the U.S. 0.03/1.84 0/0 0.03/1.84 40.38114037 -104.9352027 3.40 W86 Wetlands Unnamed 73, and potentiallyconnected to Unnamed 3 74 between Ponds and Drainage 72, Wetlands within artificially constructed area Determination yet completed to be 1.85/6.44 0/0 1.85/6.44 40.37417447 -104.936223 ,x.39 W87 Wetlands Unnamed that abutting Drainage connects to Big River (TNW) 3 Wetlands abutting Unnamed Drainage 3 Determination yet completedThompson to be 0.17/4.99 0/0 0.17/4.99 40.3657784 -104.9357012 3.38, 3.39 W88 Wetlands Little Thompson abutting the River 2- wide wetlands abutting to 20 -foot- river jurisdictional abutting jurisdictional waters Likely V.S. of known the — 0.05/1.09 0/0 0.05/1.09 40.31568006 -104.9234438 3.32, 3.33 ERO Project #5241 B-18 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Wetland / Drainage Name ID RPW, Proximity Isolated, to RPWDescription TNW, or Non- Site Jurisdictional Status Acres Unincorporated Weld (Work Limits/TWP Study County Buffer) in Incorporated Acres Weld (Work Limits/TWP Buffer) Study County in Acreage Limits/TWP Buffer) (Work Study Total Latitude Longitude Figure Number(s) W89 into A wetland connection unnamed appears hydrologic to a uplands water that ditch to dissipate connection of to (no the an has a that U.S.) 3- to 5 -foot - wide wetland Determination yet completed to be 0.71/3.42 0/0 0.71/3.42 40.61861545 -104.9393545 3.62, 3.63 W90 A possible the Canal, eventual the (TNW) wetland Larimer South which swale connection connection Platte and has with Weld an River a to to depression Wetland Determination yet completed to be 0/0.07 0/0 0/0.07 40.59573773 -104.9384824 3.60 W91 A Big (TNW) wetland Thompson adjacent to River along Thompson River Wetlands Big Determination yet completed to be 0/0.1 0/0 0/0.1 40.38299585 -104.9335675 3.40 W92 Wetlands Koenig Koenig abutting the Reservoir (see Reservoir) Wetlands abutting Koenig Reservoir the Determination yet to completed be 0.64/2.75 0/0 0.64/2.75 40.39394781 -104.9329978 3.42 W93 A Big (TNW)completed wetland area Thompson in an old near River the Wetland depression Determinationoxbow yet to be 0/0.33 0/0 0/0.33 40.3784001 -104.9353463 3.39, 3.40 ERO Project #5241 B-19 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Appendix C Cultural Resources in the TWP Study Buffer Table Cal. Previous cultural resource surveys intersecting the TWP study buffer. OAHP* Survey No. Report Title (year) Lead Agency MC.CH.R141 Project FC 014-2(3) Larimer and Weld 1-25 East Cultural Counties, Colorado Resources (2004) Report for Historical Resources Colorado Transportation Department (COOT) of MC.CH.R175 Improvements An Counties, Intensive Colorado Archaeological on US (STA-R400-173) Highway Resource Inventory 287 and (2009) State Highway of Proposed 66, Larimer Safety and Weld CDOT *MC.CH.R96 A Cultural and Communications 160, Resource and State Highways Fiber Survey Optic of Interstates 13 and 470, System, Colorado 25, 70, 225, and 270, for the Proposed Adesta (C SW00-102) U.S. Highways (2008) 34 CDOT *MC.CPO.R27 Survey Broomfield Report, Weld Counties County, Colorado (2008) Farm and Ranch Inventory, Weld and Western Studies, Historical Inc. MC.E.R70 KN Broomfield) Lateral Mainline, Wattenberg and Class Counties, Tri-Town III Transmission, Cultural Colorado, Lateral Resource L.L.C. Cultural Southeast Inventory Front of Runner Resource Erie to (FERC the Pipeline, Inventory Amoco CP98-49-000) Adams, West Report Weld, #4: Dougan (2002) (and Erie South Federal Commission Energy (FERC) Regulatory MC.E.R73 A Rebuild Class III in Inventory of Larimer and the Weld Proposed Counties, Timnath Colorado to Black (2010) Hollow Transmission Line Western Administration Loveland Area Area Power (WAPA)— Office MC.E.R80 (2009) Class Transmission Addendum Wiggins III Cultural -Erie to Transmission Line Class Resource Rebuild III Cultural Inventory Project in Resource Line Rebuild of Morgan the Beaver and Inventory Project in Creek Weld Morgan of the -Hoyt Counties, Beaver and -Wiggins Colorado Creek Weld Counties -Erie -Hoyt and - WAPA—Loveland Office Area *MC.FC.NR6 Paleontological Way for Wyoming Counties, Adesta/CDOT State Colorado Review Line, (2008) Pueblo, and 1-25 Fiber Survey Optic El Paso, of Selected Douglas, Project Sections from Adams, Pueblo, Larimer Along Colorado the and 1-25 Right to the Weld of Investigations, Paleontological Inc. MC.R.R14 Cultural Branch, Resource Inventory Boulder and of Weld Counties, the Southern Colorado Water Supply (2004) Pipeline, Fort Lupton Bureau Eastern Office of Colorado Loveland Reclamation— Area WL.CH.NR44 An Realignment (CDOT Intensive Archaeological on # Sta 0661-009) State Highway (2007) Resource Inventory 66 West of of Gowanda the , Proposed Weld County, St. drain Colorado River CDOT WL.CH.NR55 An River 066a-001, Intensive Bridge SH Cultural on 66 State at St. Resources Highway Vrain 66, Bridge) Inventory Weld (2012) County for the (CDOT Replacement of Project FBR the St. Frain 006a-002/Sta CDOT WL.CH.NR9 Archaeological 3(85)) (2002) Survey of Ehrlich Materials Pit Weld County, Colorado (IR 025- CDOT WL.CH.R40 Abandonment Johnstown, Exemption Weld County, of Colorado: the Welty Branch Results of of Section the Great Western Railway 106 Review (2009) in Surface Board Transportation WL.CH.R6 Archaeological Johnstown, Weld Survey County Road 15 Along the County (BRO 0003(5)) (2002) Little Thompson River South of CDOT *WL.PA.RS A Survey of Line (1974) the Cultural Resources of the Fort Collins -Ault 230kv Transmission Colorado State University WL.R.NR19 Cultural Application County, Resource Colorado to the (2003) Survey Northern for a Colorado Commercial Water and Residential Conservation Development District in Weld Bureau Eastern Office of Colorado Loveland Reclamation Area 'These resources are not shown on Figures 8.01-8.17. ERO Project #5241 C-1 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Table C-2. Previously identified cultural resources in the TWP study buffer. Resource Number Resource Name j Type NRHP Eligibility (year) *5WL120 Archaeological site No assessment given (1973) *5WL782 Elwell Store Field not eligible (1982) 5WL841 Great Western Railroad Officially eligible (1989) 5WL841.5 Great Western Railroad (segment) Field Contributes (2011) not eligible to Historic (1999); District 5WL841.15 Great Western Railroad "'Welty Branch (segment) Field eligible (2008) *5WL844 Larimer-Weld Canal t`' Eaton Ditch "' Eaton Canal Officially eligible (2013) 5WL860 Bunyan Siding (Great Western Railroad) No assessment (1976) given on form 5WL868 Clark Siding (Great Western Railroad) No (1976) assessment given on form 5WL898 Loveland Greeley Canal Field eligible (1999) 5WL898.8 Loveland Greeley Canal (segment) Field not eligible (1999) *5WL1073 Hillsboro Stage Station Field not eligible (1976) t5WL1263 Archaeological site Officially not eligible (1988) 5WL1526 South Platte Supply Canal Coalridge Ditch Officially not eligible (2013) 5WL1587 Single dwelling Field not eligible (1991) 5WL1969.32 Denver and Boulder Valley Railroad Field not eligible (1998) 5WL1975.3 Last Chance Ditch (segment) Officially eligible (2006) 5WL2547.2 Big Dry Creek Ditch (segment) Field eligible (2004) 5WL2988 Loveland -Greeley Canal Culvert '� C -17-D Field not eligible (2002) 5WL3007 St. Vrain River Bridge "' D -17 -AK Officially not eligible (2011) 5WL3043 Sullivan Ditch Bridge r'` WEL017.0-022.0A Field not eligible (2002) 5WL3044 Sullivan Ditch Bridge '' WEL017.0-022.08 Field not eligible (2002) 5WL3071 Bridge "` W EL068.5-013.0A Field not eligible (2002) 5WL3153 Airport -Kodak Transmission Line Field not eligible (1998) 5WL3154.2 Hoyt to Terry Street Transmission Line (segment) Does not entire support linear eligibility resource (2013) of 5WL3167 Cheyenne to Richard Lake Transmission Line Officially not eligible (2010) 5WL3167.1 Cheyenne to Richard Lake Transmission Line (segment) Officially not eligible (2008) 5WL4823 Lake Canal Field not eligible (1983) 5WL5592.1 Larimer County Canal/Ditch in Weld County (segment) Officially eligible (2008) *5WL6550 Historic isolated find Field not eligible (1994) 5WL6551 Water control feature Field not eligible (1994) *5WL6557 Animal control feature Field not eligible (1994) These resources are not shown on Figures 8.01-8:17. ERO Project #5241 C-2 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Table C-3. Cultural resources in the TWP study buffer that have not been previously documented or evaluated. Property Type I Name Address / Location Built Rural residence 33 County Road (CR) 17, Brighton, CO 80603 1965 Rural, residences single-family Jacobucci Brighton, Subdivision, lots 1, 2, 3, 4, west side of CR 17 north CO 80603 of CR 2, 1969, 1970 Rural residence 333 CR 17, Brighton, CO 80603 1969 Agricultural property 483 CR 17, Brighton, CO 80603 1960-1970 Agricultural property 1173 CR 17, Brighton, CO 80603 1919 Yoxall Ditch (5WL5573) NE % Section 32, T1N-R67W; southeast corner of CR 17 and CR 4 1896 Thompson Ditch (5WL2547) N f Brighton, Sections 28 and 29, T1N-R67W; southeast CO 80603 corner of CR 17 and CR 6; 1865 Rural residence 2044 CR 17, Brighton, CO 80603 1960 Agricultural property 2464 CR 17, Brighton, CO 80603 1934 Agricultural property 2624 CR 17, Brighton, CO 80603 1909 Agricultural property 3113 CR 17, Brighton, CO 80603 1932, 1958 Bull Canal (5WL1966) S'/2 Sections 16 and 17 T1N-R67W; CR 17 north of CR 8; Brighton, CO 80603 1903 Doyle Seepage Ditch NW14 Section 9, T1N-R67W; southeast Lupton, CO 80621 of CR 17 and CR 12 intersection, Fort 1914 Agricultural property 8098 CR 14; Fort Lupton, CO 80621 1914 Stanley Ditch (5WL1966) S Sections 32 and Fort Lupton, CO 80621 33, 12N-R67W; north of CR 17 and CR 14 intersection; 1903 Coal Ridge Ditch (5WL1526) Sections Lupton, 28, 29, 32, and CO 80621 33, T2N-R67W; intersection of CR 17 and 16; Fort 1859 Agricultural property 772 CR 16, Fort Lupton, CO 80621 1942, 1972 Agricultural property 7124 CR 17, Fort Lupton, CO 80621 1920, 1940 Agricultural poultry farm property / 7900 CR 20, Firestone, CO 80504 1960-1972 Agricultural property 10732 CR 17, Firestone, CO 80504 1930 Agricultural property 10811 CR 17, Firestone, CO 80504 1950 Agricultural property 11455 CR 17, Firestone, CO 80504 1919 Lupton (5W Bottom Ditch L2652) Sections 4 Intersection and of 5, T2N-R67W; CR 17 and Section 33, T3N-R67W CR 26; Firestone, CO 80504 1863 laterals Last Chance Ditch (5WL1975) and Sections 28, 29, 32, and 80651 33, T3N-R67W; CR 17 north of CR 26; Platteville, CO 1872 Agricultural property 13187 CR 17, Platteville, CO 80651 1935 Agricultural property 13473 CR 17, Platteville, CO 80651 1890, 1930 Agricultural property 7233 Hwy 66, Platteville, CO 80615 1930-1970 Diamond Reservoir N Platteville, l Section 17, 13N-R67W; southeast of CO 80651 CR 17 and CR 34 intersection; 1901 Agricultural property 7562 CR 38, Johnstown, CO 80534 1900, 1930, 1960 Agricultural property 7571 CR 38, Johnstown, CO 80534 1900, 1959 Unnamed Minnie Reservoir seep ditch from Section Johnstown, 32, 14N-R67W; CO northwest 80534 of CR 17 and CR 38 intersection; Ca. 1907 Farmer's (5WL3148.1) Extension Ditch Johnstown, S 1/2 Section 29, T4N-R67W; CO 80534 northwest of CR 17 and CR 40 intersection; 1900 Agricultural property 7528 CR 42, Johnstown, CO 80534 1955 Agricultural property 7375 CR 42, Johnstown, CO 80534 1900, 1949 Agricultural property 19943 CR 15, Johnstown, CO 80534 1915-1940 Agricultural property 20121 CR 15, Johnstown, CO 80534 1910-1963 Agricultural property 20700 CR 15, Johnstown, CO 80534 1915 Rural residence 20765 CR 15, Johnstown, CO 80534 1962, 1967 Agricultural property 21045 CR 15, Johnstown, CO 80534 1900, 1917 ERO Project #5241 C-3 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Property Type I Name Address / Location Built Hillsboro Ditch (5WL2590) Sections CR Johnstown, 44; 17, south 18, of CO 19 intersection 80534 T4N-R67W; Section of CR 1 and 30, CR T5N-R67W 54 1861 Agricultural property 6086 W. S. 1st St., Johnstown, CO 80534 1902, 1958 Agricultural property 6043 Hwy 60, Johnstown, CO 80534 1900 Agricultural property 6037 Hwy 60, Johnstown, CO 80534 1902-1930 Agricultural property 23101 CR 13, Johnstown, CO 80534 1932-1947 Agricultural property 23165 CR 13, Johnstown, CO 80534 1900► Elwell/Johnstown Cemetery SE % Section 1, intersection; Johnston, T4N-R68W; northeast CO 80534 of CR 13 and Colorado Blvd. 1902 Unnamed inlet and reservoir outlet ditches and its SW X Section 31, T8N-R67W Early 1900s Koenig reservoir SE X Section 18, T5N-R67W Early 1900s Rural residence 6560 CR 52 A, Johnstown, CO 80534 1909 Agricultural property 6491 CR 50, Johnstown, CO 80534 1947 Agricultural property 6504 CR 50, Johnstown, CO 80534 1971 Agricultural property 23898 CR 13, Johnstown, CO 80534 1900 (5WL2587) Thompson and Platte Ditch Section 6, T4S-R67 Intersection of W; Section CR 13 and 1, T4S-R68W CR 14; Johnstown, CO 80534 1865 Agricultural property 21638 CR 15, Johnstown, CO 80534 1880-1980 Rural residence 21607 CR 15, Johnstown, CO 80534 1950 Historic barn 21657 CR 15, Johnstown, CO 80534 1950 Hillsboro Ditch laterals Section Johnston, 31, TSN-R67W; CO 80534 north of CR 50 and County Line Road intersection; Ca. 1900 Agricultural property 22094 CR 15, Johnstown, CO 80534 1910 Hill and Brush Ditch Section 80534 19, 15N-R67W; north of CR 1 and CR 54 intersection; Johnstown, CO 1866 Union Dent Branch Pacific Railroad (5WL1317) Section 18, T5N-R67W; 80534 north of CR 1 and CR 56 intersection; Johnstown, CO 1910 Farmer's Ditch Section 18, T5N-R67W; north 80534 of CR 1 and CR 56 intersection; Johnstown, CO 1864 Oklahoma Lake SW Johnstown, % Section 6, CO 80534 TSN-R67W; northeast of CR 1 and CR 60 intersection; 1890 Agricultural property 6114 CR 68.5, Windsor, CO 80550 1899 Greeley (5WL842) No. 2 Canal Section 18, CO 80550 T6-NR67W; south of intersection of CR 13 and CR 40; Windsor, 1870 Rural residence 6109 CR 68.5, Windsor, CO 80550 1950 Agricultural property 33864 CR 13, Windsor, CO 80550 1938 Greeley Railroad/Colorado Southern (5WL1043) Salt Railroad Lake & Pacific & Section 7, T6N-R67W; 80550 south of CR 13 and CR 72 intersection; Windsor, CO 1880 Sections CO 80524 7 and 18, 17N-R67W; intersection of CR 13 and CR 17; Fort Collins, Agricultural property 35106 CR 13, Windsor, CO 80550 1899-1929 Agricultural property 37162 CR 13, Windsor, CO 80550 1950 Agricultural property 38434 CR 13, Windsor, CO 80550 1905-1953 Larimer and Weld Canal (5WL844) NW 14 Windsor, Section 19, T7N-R67W; southeast of CR 13 and CR 80 intersection; CO 80550 1879 Agricultural property 38568 CR 13, Windsor, CO 80550 1960, 1989 Agricultural property 6154 CR 80, Windsor, CO 80550 1954 Agricultural property 6148 CR 80, Windsor, CO 80550 1915, 1935 Agricultural property 6181 CR 80, Windsor, CO 80550 1905-1950 Agricultural property 39500 CR 13, Fort Collins, CO 80524 1950 Agricultural property 6153 E. Hwy 14, Fort Collins, CO 80524 1900, 1965 Agricultural property 40898 CR 13, Fort Collins, CO 80524 1900-1961 ERO Project #5241 C-4 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Property Type / Name Address / Location Built Agricultural property 6011 CR 84, Fort Collins, CO 80524 1909, 1935 Agricultural property 41132 CR 13, Fort Collins, CO 80524 1965, 1971 Agricultural property 42078 CR 13, Fort Collins, CO 80524 1922 Merrill associated Seep Lake seep and ditches SW Collins, 1/4 Section 31, T8N-R67W; CO 80524 northeast of CR 13 and CR 86 intersection, Fort 1953 Cactus (SW'L5593) Hill Lateral W 1/a Section 30, Collins, CO 80524 18N-R67W; southeast of CR 13 and CR 90 intersection; Fort 1900 ERO Project #5241 C-5 ERO Resources Corporation Revised Natural and Cultural Resources Assessment Thornton Water Project —Weld County Permit Areas Weld County, Colorado Appendix D Figures Figure 1. Vicinity Map Figure 2. Map Index Figures 3.01-3.66. Vegetation Communities. Figure 4. Special Status Wildlife Overview Figures 5.01-5.66. Wildlife Figure 6. General Wildlife Overview Figure 7. Mule Deer and White -Tailed Deer Overview Figures 8.01-8.17. OAHP File Search Results ERO Project #5241 ERO Resources Corporation •17 1L N 0 17 U -c C 'L c "Y N n 4.1 •1; C Cl Cam O 1ui:i7o,` ricks 1 oval and - Cam pion Location COLORADO sicia,ci Any a1 Murucip i.I 4 I 4 acre st Fort Lupton F tt ."ire Thornton Water Project Weld County, Colorado TWP Work limits TWP Study Buffer 0 3 6 Miles N ��"rf l�talq L ttlet- Rel s eA'Yad.I Platte Val l ey 4Airpark t 'Hudson E Ernrhely L n Figure 1 Vicinity Map Prepared for: City of Thornton File: 05241 Figure 1 1041 Weld.mxd [dIH] January 26, 2021 ERA ESC} R sources: Coro. Portions of this document include intellectual property of ES RI and its licensors and are used herein under license. Copyright C 2016 ESRI and its licensors. All rights reserved. Thornton Water Project TWP Work limits TWP Study Buffer Figure 2 Map index National Geographic Fire. Gain] ir,MERE, UN EP-WCMC, U 56 5, tAli5,4, ES:, KI=T' 4RCAN,GEBCO.NOM, IncreenertPCog p, 0 8,500 17,000 Peet N A •t ions of ink dnr.i.meld 'icier.°Intr. prapartrofESiil.rteits licensors a.idarch used gerei .indo, license. Coprrtgi:.It; 7{170 ESRI.:idrs licorlon . AI rights raceM.d. Prepared far: City or Thornton File:03241 Figure2 1041 Weld.mxd dIHI :a n ua ry 26, 2021 ERG) r a 't!. Or P for 4 ,14 • lb rr Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3.01 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd dtHI January 2.6, 2921 ERG) 0 150 300 Feet Aerial Imego: 9 Copyright U50A r AIP CCO Pac —.g Cc . • Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed Figure 3.02 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd dlHI January 2g, 2921 ERG) 0 150 300 Feet Aerial Image: 9 Copyright U51)A r AIP Thornton Water Project TWP Study Buffer 1 Work Limits I Ditch Open Water Wetland Riparian 1.74 ac Mixed Upland Agricufturar Nonnative Upland Developed/Disturbed Big Dry Creek 1.44 ac Q,11ac Unnamed Pond 38 5.53 ac N A Figure 3.03 Vegetation Communities Prepared for: city of Thornton File:05241 Figure 31041 Weld.mxd :cIHI January 2g, 2021 ERQ 50 LRO I'r.?C.t','rg Lc'L. Aerial Imp © Copyright USDA N'AIP .4I all'.FJ� I` "!l Y Thornton Wate r Project TWP Study Buffer L_ ] Work Limits Ditch Open Water Wetland Riparian 6 Mixed Upland Agricultural Non native Upland Developed/Disturbed Figure 3.04 Vegetation Communities Prepared For: City of Thornton File:05241 Figure 3 1041 Weld.mxd dtHI January 2g, 2021. ERG) 0 150 300 Feet Leo I ' ,s L.. •J. Aerial Icge: 9 Copyright U5I3A NAP Unnamed Pond 32 0.&9 ac Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Unnamed Pond 35 0.15 ac Weld County Unnamed Pond 36 1.51 ac Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Unnamed Pond 34 0.14 ac Unnamed Pond 37 0.94 ac N A Figure 105 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd lrj January 2,6, 2021 ilia .-F F 7..0 C..: _._-s Ccir. Aerial Imcge:9 Copyright USIA N'AIP qk • Thornton Water Project TWP Study Buffer I L_ Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricu[turar Nonnative Upland Developed/Disturbed N A Figure 3.06 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd January 2g, 2021 ERQ 50 ilia Feet CRO Aerial Imp © Copyright USDA N'AIP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed Figure 3.07 Vegetation Communities Prepared 1o•: Cily of Thornton File:03241 Figure3 1041 Weld.mxd dtHI :anuary 26, 2021 ERG) 150 300 reel Aerial Iege Q Copyright U5I3A NAP a T Thornton Water Project TWP Study Buffer L _1 Work Limits n Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3.08 Vegetation Communities Prepared le•: City of Thornton File:03241 Figure 1041 Wefd.m'd dIHI . a n ua ry 26, 2421 ERQ ili0 rFF Aerial Imcge © Copyright USIA N'AIP R e r p Thornton Water Project TWP Study Buffer L _1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3.09 Vegetation Communities Prepared fa': City el Thornton file: 05241 Figure 2 1041 Weld !MCI dIHl .anuary 26, 2021 ERQ C 507 Aerial Imcge © Copyright USIA N'AIP 4 Thornton Water Project TWP Study Buffer L_ ] Work Limits M Ditch Open Water Wetland Riparian V Mixed Upland Agricultural Non native Upland Developed/Disturbed I Figure 3.1.0 Vegetation Communities Prepared roc City of Thornton File:05241 Figure 3 1041 Weld.mxd dtHI :a n ua ry 26, 2021 ERG) 0 150 300 reel CQ.O .,sC Aerial Iege Q Copyright U5I3A NAP T 1 I - Thornton Water Project TWP Study Buffer L Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3.1.1 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 26, 2021 ERG) 0 150 300 Feet Aerial Imp: 9 Copyright USDA r AIP cco FAtc".-z-hiCc . T Thornton Water Project TWP Study Buffer I L_ Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricu[turar Nonnative Upland Developed/Disturbed N A Figure 3.12 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd January 2g, 2021 ERQ 50 ilia Feet CRO Aerial Imp © Copyright USDA N'AIP Thornton Water Project TWP Study Buffer I 1 Work Limits • Ditch Open Water Wetland Riparian I ti ti Mixed Upland Agricu[turar Nonnative Upland Developed/Disturbed N A Figure 3,13 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd :cIHI January 2g, 2021 ERQ 50 7i;0 rFF Aerial Imp © Copyright USDA N'AIP • f • :t • Thornton Water Project TWP Study Buffer L_ Work Limits N Ditch Open Water Wetland Riparian Mixed Upland Agricu[turar Nonnative Upland Developed/Disturbed N A Figure 3.14 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd :cIHI January 2g, 2021 ERQ 0 507 7i;n Feet Aerial Imp © Copyright USDA N'AIP CRO Thornton Water Project TWP Study Buffer L _1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3.15 Vegetation Communities Prepared for: City of Thornton File:03241 Figure 1041 Wefd.m id dIHI .anuary 26, 2021 ERQ 50 Aerial Imcge © Copyright USIA N'AIP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3.1.6 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041Weed.mxd Al January 2g, 2921 ERG) 0 150 300 Feet Aerial image: © Copyright USDA IrAIP 1 Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed Figure 3.1,7 Vegetation Communities Prepared for:City of Thornton File:05241 Figure 31441 Weld.mxd dtHI January 2.6, 2921 ERG) 0 150 300 Feet Aerial Icge: 9 Copyright U50A NAP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3.1.8 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 2.6, 2921 ERG) 0 150 300 Feet Aerial Image: 9 Copyright USDA r AIP Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd c lr,I January 26, 2021 Aerial Imp © Copyright USDA N'AIP t • } • Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian St. Vrain Creek 3.$4 ac 1.75 ac Unnamed Pond 24 2.46 ac Mixed Upland Agricultural Nonnative Upland Developed/Disturbed W27 Figure 3.20 Vegetation Communities Prepared ion City of Thornton File:05241 Figure 31041 Weld.mxd c IHj January 26, 2021 50 C 1. ,'rS L . Aerial Imp © Copyright USDA N'AIP *.- Thornton Water Project TWP Study Buffer L_ Work Limits I Ditch Open Water Wetland Riparian I Mixed Upland Agricu[turar Nonnative Upland Developed/Disturbed I Ic L N A Figure 3,21 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd :cIHI January 26, 2021 ERQ 50 ilia Feet CRO Aerial Imp © Copyright USDA N'AIP Thornton Water Project TWP Study Buffer 1 Work Limits I Ditch Open Water Wetland Riparian Mixed Upland Agricufturar Nonnative Upland Developed/Disturbed N A Figure 3.22 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd January 2g, 2021 ERQ %50 ilia rEEt CGO Aerial Imp © Copyright USDA N'AIP Thornton Water Project -RA/P Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed L_ r - Diamond Reservoir 3,4 ac N A Figure 3,23 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 2g, 2021 ERG) 0 150 300 Feet CCO Peat"--z-hi Aerial Imp © Copyright USDA N'AIP Thornton Water Project -RA/P Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3,24 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 2g, 2021 ERG) 0 150 300 Feet cco Peat"--z-hi Cc . Aerial Imp © Copyright USDA N'AIP Thornton Wate r Project TWP Study Buffer L_ ] Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed N A Figure 3.25 Vegetation Communities Prepared ion City of Thornton File:05241 Figure 3 1041 Weld.mxd dtHI :a n ua ry 26, 2021. 0 250 300 Feet Aerial Imoge:9 Copyright U50A NAP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3,26 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Werd.mxd c IHj January 2g, 2021 50 ilia ;7EFt CQ,O 1. . Aerial Imp © Copyright USDA N'AIP ilk Thornton Water Project TWP Study Buffer N Ditch Mixed Upland 1 Work Limits Open Water Agricurturar Wetland Nonnative Upland r Riparian ilk Developed/Disturbed N A Figure 3.27 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd January 2g, 2021 ERQ 50 ilia Feet LP,0 I'r. 1. ,'rg L.. t,. Aerial Imp © Copyright USDA N'AIP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed N A Figure 3.28 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 2.6, 2921 ERG) 0 150 300 Feet Aerial Image: 9 Copyright USDA r AIP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed N A Figure 3.29 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 2.6, 2921 ERG) 0 150 300 Feet Aerial Image: 9 Copyright USDA r AIP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed Figure 3.30 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd dtHI January 2.6, 2921 ERG) 0 150 300 Feet Aerial Image: 9 Copyright U51)A r AIP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed Figure 3.31, Vegetation Communities Prepared for: City of Thornton File:05241 Figure 3 1041 WeFd.mxd dIHI :awary 26,2921 ERG) 0 250 300 Feet Leor.� .=LV Aerial Iege Q Copyright U50A NAP Thornton Water Project TWP Study Buffer 1 Work Limits Little Thompson River 0, 33 ac Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed 300 reel Figure 3.32 Vegetation Communities Prepared foe: Cily el Thornton File: 03241 Figure 1041 Weld.mxd dIHI :anuary 26. 2021 Leo Aerial Iege Q Copyright U5I3A NAP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed N A Figure 333 Vegetation Communities Prepared for: Cily of Thornton File: 03241 Figure3 1041 Weid.mxd dIHI January 26, 2021 ERQ 50 5G0 Peet LRO iatl. ;rS L.. j. Aerial lmcge. 4 Copyright USDA RAP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricufturar Nonnative Upland ilk Developed/Disturbed • 1 1 L 1 1 I Figure 334 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd c lr,I January 2G, 2021 ERO ilia Peet cco Aerial Imp © Copyright USDA N'AIP S_ Thornton Wate r Project TWP Study Buffer L_ ] Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed N 300 Feet Figure 3.35 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd dtHI January 2.6, 2921 ERG) 150 CCO Pac —.g Cc . Aerial Imego: 9 Copyright U50A r AIP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3.36 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 2.6, 2921 ERG) 0 1.50 300 Feet Aerial Image: 9 Copyright USDA r AIP Thornton Water Project TWP Study Buffer 1 Work Limits Unnamed Drainage 7 03 ac Ditch Open Water Wetland Riparian Unnamed Pond 75 2.14 ac Mixed Upland Agricultural Nonnative Upland Developed/Disturbed 3.62ac ti fl Figure 3.37 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd c lr,I January 26, 2021 ERO 50 3G0 rF F Ecti Aerial Imp © Copyright USDA N'AIP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/D►sturbed Figure 338 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Werd.mxd c IHl January 26, 2021 50 Aerial Imp © Copyright USDA N'AIP Thornton Water Project TWP Study Buffer L_ Work Limits N Ditch Open Water Wetland Riparian Mixed Upland Agricu[tural Nonnative Upland Developed/Disturbed Unnamed Pond 73 638 ac N A Figure 339 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd :cIHI January 2g, 2021 ERQ 0 507 7i;n Feet CRO Aerial Imp © Copyright USDA N'AIP Big Thompson River 2.39 ac Thornton Water Project TWP Study Buffer L_ Work Limits I Ditch Open Water Wetland Riparian Mixed Upland Agricufturar Nonnative Upland Developed/Disturbed N A Figure 3.40 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd :c'IHI January 2g, 2021 ERQ 50 ilia Peet CRO Aerial Imp © Copyright USDA N'AIP ti T T Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed Figure 3.41, Vegetation Communities Prepared ion City of Thornton File:05241 Figure 3 1041 Weld.mxd dtHI :a n ua ry 26, 2021. ERG) 0 250 300 Feet Aerial Imoge:9 Copyright U50A NAP Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 2.6, 2921 Aerial Image: 9 Copyright USDA r AIP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed N A Figure 3.43 Vegetation Communities Prepared ion City of Thornton File:05241 Figure 3 1041 Weld.mxd dtHI January 2g, 2021. ERG) 0 150 300 Feet Aerial Icge: 9 Copyright U5I3A NAP • lie . ! r-; 1 a - a tar 1 • ePt* 1 4 ti I Y • a • f r Thornton Water Project TWP Study Buffer L _1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3.44 Vegetation Communities Prepared fa': City el Thornton file: 05241 Figure 3 1041 Weld.mwd dIHI .anuary 26, 2021 ERQ 50 7+;0 r7FF Aerial Imcge © Copyright USIA r%AIF� T n Larimer County Thornton Water Project TWP Study Buffer L _1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Oklahoma Reservoir 16.21 ac Figure 3.45 Vegetation Communities Prepared fa': City el Thornton file: 05241 Figure 2 1041 Weld.mwd dIHI .anuary 26, 2021 ERQ 5I0 ili0 rFF Aerial Imcge © Copyright USIA N'AIP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed j --4 4 254 300 Feet Figure 3.46 Vegetation Communities Prepared Ion City of Thornton File:05241 Figure 3 1041 Weld.mxd dIHI :anuary2b,2021 CQ.O .,sC Aerial Icge Q Copyright U5I3A NAP VEEP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed Figure 3.47 Vegetation Communities Prepared Inc City of Thornton File:05241 Figure 3 1041 Weld.mxd dIHI :a n ua ry 26, 2921 ERG) CQ.O .,sC Aerial Iege Q Copyright U5I3A NAP 1:. Est Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed "1 N A Figure 3.48 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd lrj January 2,6, 2021 50 7..0 r,.: _._-s Ccir. Aerial Imcge:9 Copyright USIA N'AIP 'a.% OIL "Ipthset lire] Pe. S Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Develop ed/DPstu rbed Cache la Poudre River 1.84 ac Figure 3.49 Vegetation Communities Prepared For: City of Thornton File:05241 Figure 31041 Weld.mxd c IHl January 26, 2021 0 50 ilia rEEt C 1. ,.- L . Aerial Imp © Copyright USDA N'AIP Unnamed Pond 11 '-i48 at Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed Figure 3.50 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd dtHI January 2& 2921 ERG) 0 150 300 Feet Aerial Imego: 9 Copyright U50A r AIP CCO Pac —.g Cc . Thornton Water Project -RA/P Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Develop ed/Disturbed Figure 3,51, Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 26, 2021 ERG) 0 150 300 reet Aerial Imp 9 Copyright USDA N'AIP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Develop ed/Disturbed Figure 3,52 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 2g, 2021 ERG) 0 150 300 Feet Aerial Imp 9 Copyright USDA N'AIP n 7 Igt•1,a . Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian nnamed Pond 8 11c Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3.53 Vegetation Communities Prepared Ion City of Thornton File:05241 Figure 3 1041 WeFd.mxd dtHI :anuary26,2021 ERG) 0 250 300 Feet Leo Aerial Imcge: 1 Copyright U50A NAP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/D►stu rbed N A Figure 3,54 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd lrj January 2,6, 2021 C 507 Aerial Imcge: 9 Copyright USIA IVAIP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3.55 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 2.6, 2921 ERG) 0 150 300 Feet Aerial Image: 9 Copyright U51)A r AIP _y • i est S r W 6_ JO ri I II rim IL Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed .` Figure 3,56 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd c IHj January 2g, 2021 50 Aerial Imp © Copyright USDA N'AIP Thornton Water Project -RA/P Study Buffer L Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed N A Figure 3,57 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 2g, 2021 ERG) 150 meet CCO Peat"--z-hi Aerial Imp © Copyright USDA N'AIP r1 r 'T Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3.58 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 2.6, 2921 ERG) 0 150 300 Feet Aerial Image: 9 Copyright USDA r AIP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed Figure 3.59 Vegetation Communities Prepared For: City of Thornton File:05241 Figure 3 1041 Weld.mxd dtHI January 2g, 2021. ERG) 0 150 300 Feet Aerial Icge: 9 Copyright U5I3A NAP Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 26, 2021 Aerial Imp © Copyright USDA N'AIP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed Figure 3.61 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 2.6, 2921 ERG) 0 150 300 Feet Aerial Image: 9 Copyright USDA r AIP Larimer County Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Non native Upland Developed/Disturbed Figure 3.62 Vegetation Communities Prepared ion City of Thornton File:05241 Figure 3 1041 Weld.mxd dtHI January 2g, 2021. ERG) 0 150 300 Feet Aerial Icge: 9 Copyright U5I3A NAP Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed ottetssis i i Figure 3.63 Vegetation Communities Prepared For: City of Thornton File:05241 Figure 31441 Weld.mxd cIHI January 2g, 2921 S ERG) 0 150 300 Feet CCOI' 1.,s Cc:is Aerial Icge: 9 Copyright USDA NAP Thornton Water Project -RA/P Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian Mixed Upland Agricultural Nonnative Upland Developed/Disturbed 0 • 150 300 Feet Figure 3.64 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd cIHI January 2g, 2021 "OP itt ERG) cco Ieat"--.-hiCc . Aerial Imp © Copyright USDA N'AIP Larimer County Thornton Water Project TWP Study Buffer 1 Work Limits Ditch Open Water Wetland Riparian 4 Fa:am— Mixed Upland Agricultural Nonnative Upland Developed/Disturbed 4: all.MMElailli N A Figure 3.65 Vegetation Communities Prepared For: City of Thornton File:05241 Figure 3 1041 WeFd.mxd dtHI :anuary26,2021 ERG) 1.50 300 Peet Aerial Imoge: 1 Copyright U50A NAP Thornton Water Project TWP Study Buffer 1 Work Limits I Ditch Open Water Wetland Riparian L Mixed Upland Agricultural Nonnative Upland Developed/Disturbed N A Figure 3.66 Vegetation Communities Prepared for: City of Thornton File:05241 Figure 31041 Weld.mxd :cIHI January 2g, 2021 sen —r ERQ CRO Aerial Imp © Copyright USDA N'AIP C fil 4i SS O 4) C C O O f�l t3, .0 '1) 0 L t._13 s 2 0 0 I— =t N a C 3fl tt p11 LII • ict V. Nit LIN-J a s c t 'grailiik.s. „Ave I o� 0 L Milera, O Thornton Water Project 0 0 TVA/P Work Limits TWP Study Buffer Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found 1 Vin E' �ikI$ 4. CI AA':pOr air '4 * 4 I i �. 0 Ec,rt Caitlin: t 0 - MIA". GU qlL I 'i 0 e. •Lkbnirti Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration t Or:PI sr ',ilia((. I z at/4t' NVA h Almon ,*.Erie Er LeiM'rug caul l irPc II Lati • J I f ' wel, • It aariMe 7 L 3(c Bald Eagle Winter Range Common Gartersnake Overall Range Swift Fox Overall Range 0 15,000 30,000 Feet • I r N • Y ail Y 1- • # ric � \I\ 1 Gs! crect Foit ILK,! p son 0 KLI get Strong $1brpp curl dl 'IIn I Plah ■ /alley ikAIPark 0 P1 7A5ti N 4A trY eel ail S Cr at Htacoin Figure 4 Special Status Wildlife Overview Prepared for: City of Thornton File: 05241 Figure 41041 Weld.mxd [dIH] January 26, 2021 ERA ERO R ourc:is: Coro. • r Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright it? 2026 ESRI and its licensors. All rights reserved. Figure 5.01 Thornton Water Project TWP Work limits TWP Study Buffer Prairie Dog Colony •Y❖.•.*: Bald Eagle Nest Observed by ERO '; Raptor Nest Observed by ERO 0 0 Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration 150 300 Feel Prepared run City or Thornton File:05241 Figure 51041 Weld.mxd dtHI January 2g, 2021 ERG) Aerial Icge: 9 Copyright U5I3A P+`AIP CCOP✓.c —.g Cc . .4. so so Figure 5.02 Tho rnto n Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared run City of Thornton File:05241 Figure 51041 Weld.mxd dtHI January 2g, 2021 ERG) Aerial Icge: 9 Copyright USr7A NAP Figure 5.03 Thornton Water Project L__] TWP Work limits Q TWP Study Buffer Prairie Dog Colony C;) 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared for: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dIHI :anuary 26. 2021 ERG) eeo r✓.C�t' r. L.. ,. Aerial Iege Q Copyright USr7A NAP Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared fo•: C ily of Thornton File: 03241 Figure 31041 Werd.mxd ciHI :anuary 26, 2021 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ER0 Preble`s Evaluated - Not Trapped Aerial Imcge: © Copyright U5l3A h'4, : ta a s • . x A : ( c 'ea e: V 'l! P.••P 4:..Z ins• ' P. T 9.. a C 8 'Y7 -, F. Y - . .••.A Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared for:C0N of Thornton File: 03241 Figure 31041 Werd.mxd dIHI :anuary 26, 2021 Prepared Fun City or Thornton File:05241 Figure 51041 Weld.mxd cIHI January 2g, 2021 T'NP Work limits TWP Study Buffer Prairie Dog Colony Aerial Imcge © Cupyrigt,t USI A r%AIF� Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range mob' { .'a! Skccir ${ 4 i i t a ky-y yi+' is a¢'. - Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration F'rQpared fo•: Cily el Thernlon File: 05241 Figures 1041 WeldAyed dIHI .anuary 26, 2021 { Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Figure 5.08 J - Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range I I 1 I I Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration - 0 Cr) 300 N R Prepared roar: City of Thornton File:05241 Figure 51041 WeFd.mxd dtHI :anuary 26, 2021 ERG) Leo I'1.Y.:L.. Aerial Iege Q Copyright U5I3A NAP Figure 5.09 Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony •Y❖.•.*: 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared fo•: City of Thornton File: 05241 Figure 51041 Weld.mxd dIHI ianuary 26, 2021 Aerial Iege Q Copyright USr7A NAP Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Prehlc's Evaluated - Not Trapped Aerial km le: 9 Copyright USIA R'AIP Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared run City of Thornton File:05241 Figure 51041 Weld.mxd !Hi January 26, 2021 C'Olirl_,,1:.. Prepared inn City or Thornton File:05241Figure 51041Wefd.mxd !Hi January 26, 2021 Bald Eagle Nest Observed by ERO UBald Eagle Nest Site Raptor Nest Observed by ERO —IVBald Eagle Roost Site Prehlc's Evaluated Iot Trapped %v4 Bald Eagle Communal Roost Preble's Trapped Aft Found Bald Eagle Winter Forage Prpbi c ♦7rrtrrsi�d Ramc� Bald Eagle Winter Concentration Aerial Imoge: © Copyright USDA N'AIP Prepared Fun City or Thornton File:05241 Figure 51041 Weld.mxd c IHj January 2g, 2021 in:=4 IOW • J Thornton Water Project TWP Work limits TWP Study Buffer Prairie Dog Colony 1 Bald Eagle Nest Observed by ERO '; Raptor Nest Observed by ERO 0 0 Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5.13 wildl le Prepared run City or Thornton File:05241 Figure 51041 Weld.mxd dtHI January 2g, 2021 ERG) CCOP✓.c —.g Cc . Aerial Icge: 9 Copyright U5I3A N!AIP Thornton Water Project L TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble"s Trapped - Not Found Preble's Occupied Range PA Bald Bald Bald Bald Bald Eagle Nest Site Eagle Roost Site Eagle Communal Roost Eagle Winter Forage Eagle Winter Concentration Figure 514 Wildlife Prepared inn City or Thornton File:05241 Figure 51041 Weld.mxd :cIHI January 26, 2021 ERQ CRO Aerial Image: © Copyright USDA N'AIP Dt t I' f Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony •Y❖.•.*: 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5.x.5 Wildlife Prepared roar: City of Thornton File:05241 Figure 51041 WeFd.mxd dtHI :anuary26,2921 ERG) Aerial Iege Q Copyright USr7A NAP CQ.0 . ,s C Thornton Water Project L__] TWP Work limits Q TWP Study Buffer Prairie Dog Colony C;) 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5.I.6 Wildlife Prepared for: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dtHI :anuary 26. 2021 ERG) Aerial Iege Q Copyright USr7A NAP Prepared Fun City of Thornton File:05241 Figure 51041 Weld.mxd cIHI January 2g, 2021 TWP Study Buffer Prairie Dog Colony Aerial Imcge.. © Copyright USr7A IVAIP Bald Eagle Nest Observed by ERO Raptor Nest Observed by ER0 Preble`s Evaluated - Not Trapped Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared for:C0N of Thornton File: 03241 Figure 31041 Werd.mxd dIHI :anuary 26, 2021 4 Figure 5.19 Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared for: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dIHI :anuary 26. 2021 ERG) COen.:i:".4.= cc Aerial Iege Q Copyright USr7A NAP Figure 5.20 Thornton Water Project L__] TWPWork limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared run City of Thornton File:05241 Figure 51041 Weld.mxd cIHI :a n ua ry 26, 2021 ERG) Aerial Icge: 9 Copyright USr7A NAP r 4 rr ASAAWrAMSASASarAl Thornton Water Project LTWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5.21 Wildlife Prepared run City of Thornton File:05241 Figure 51041 Weld.mxd dtHI January 2g, 2021 ERG) Aerial Icge: 9 Copyright USr7A NAP Thornton Water Project L__I TWP Work limits Q TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble"s Trapped - Not Found Preble's Occupied Range PA Bald Bald Bald Bald Bald Eagle Nest Site Eagle Roost Site Eagle Communal Roost Eagle Winter Forage Eagle Winter Concentration Figure 5.22 Wildlife Prepared Fun City or Thornton File:05241 Figure 51041 Weld.mxd :cIHI January 26, 2021 ERQ CRO Aerial Image: © Copyright USDA N'AIP Bald Eagle Nest Observed by ERO Raptor Nest Observed by ER0 Preble`s Evaluated - Not Trapped Prepared run City of Thornton File:05241 Figure 51041 Weid.mxd dtHI 2a n ua ry 26, 2021 7 Thornton' Water Project L__I TWP Work limits ; Q TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble"s Trapped - Not Found Preble"s Occupied Range eN c©unty f aK`d,4344 Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5.24 Wildlife Prepared inn City or Thornton File:05241 Figure 51041 Weld.mxd :cIHI January 26, 2021 ERQ Lq,C) itntrzt-,'rt L.. t,. Aerial Imese: © Copyright USDA N'AIP Bald Eagle Nest Observed by ERO Raptor Nest Observed by ER0 Preble`s Evaluated - Not Trapped Prepared fo•: C ily of Thornton File: 03241 Figure 31041 Werd.mxd dIHI :anuary 26, 2021 Thornton Water Project L__1 TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range _ ,oa —_ Sr Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5.26 JildUfe Prepared for: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dIHI :anuary 26. 2021 ERG) eeo r✓.C�t� a L.. ,. Aerial Iege Q Copyright USr7A NAP Figure 5.27 Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared fo•: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dIHI :anuary 26, 2021 ERG) eeo r✓.C�t' a L.. ,. Aerial Iege Q Copyright USr7A NAP Thornton Water Project L —_I TWP Work limits Q TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble"s Trapped - Not Found Preble"s Occupied Range PA Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5.28 Wildlife Prepared Fun City or Thornton File:05241 Figure 51041 Weld.mxd sill January 2g, 2021 ERG) cco I'ac .-,'rt Cc . Aerial Image: © Copyright USDA N'AIP Thornton Water Project L__1 TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 • r Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5,29 WMIdlife Prepared for: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dtHI :anuary 26. 2021 ERG) Aerial Iege Q Copyright USr7A NAP Figure 5.30 Thornton Water Project L -_I TWP Work limits Q TWP Study Buffer Prairie Dog Colony O 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble"s Trapped - Not Found Preble's Occupied Range PA Bald Bald Bald Bald Bald Eagle Nest Site Eagle Roost Site Eagle Communal Roost Eagle Winter Forage Eagle Winter Concentration Prepared fon City of Thornton File:05241 Figure 51041 Weld.mxd sill January 2g, 2021 ERG) CCO Aerial Image: 9 Copyright USDA N'AIP Bald Eagle Nest Observed by ERO Raptor Nest Observed by ER0 Preble`s Evaluated - Not Trapped Prepared for:Cityof Thornton File:05241 Figure 51041 Weld.mxd dtH� :a n ua ry 26, 2021 Figure 5.32 Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony l;\ ,.2 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared fo•: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dIHI :anuary 26. 2021 ERG) eeo r✓.C�t' r. L.. ,. Aerial Iege Q Copyright USr7A NAP Thornton Water Project L__I TWP Work limits Q TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble"s Trapped - Not Found Preble's Occupied Range PA Bald Bald Bald Bald Bald Eagle Nest Site Eagle Roost Site Eagle Communal Roost Eagle Winter Forage Eagle Winter Concentration Figure 5.33 Wildlife Prepared Fun City or Thornton File:05241 Figure 51041 Weld.mxd :cIHI January 26, 2021 ERQ CRO Aerial Image: © Copyright USDA N'AIP Figure 5.34 b. Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared for: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dtHI :anuary 26. 2021 ERG) Aerial Iege Q Copyright USr7A NAP eeo r✓.C�t' r. Cc:is P S •� WScdt'inv Thornton Water Project L__1 TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Ca rnt on Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration County Figure 5.35 4^ idlife Prepared for: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dtHI :anuary 26. 2021 ERG) Aerial Iege Q Copyright USr7A NAP Thornton Water Project L__1 TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 536 Wildlife Prepared for: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dtHI :anuary 26. 2021 ERG) Aerial Iege Q Copyright USr7A NAP 1 Thornton Water Project L__I TWP Work limits : Q TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble"s Trapped - Not Found Preble's Occupied Range PA Bald Bald Bald Bald Bald Eagle Nest Site Eagle Roost Site Eagle Communal Roost Eagle Winter Forage Eagle Winter Concentration R ri.40n - 0 Figure 537 WMIdlife C!j Prepared Fun City or Thornton File:05241 Figure 51041 Weld.mxd c IHl January 2g, 2021 Si00 ERO CcO Aerial Image: © Copyright USDA N'AIP Figure 5.38 Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range County adt5i 2 Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration County Rood, 52 Prepared for: C ily el Thornton File: 03241 Figure 31041 Werd.mxd dIHI :anuary 26, 2021 ERG) Aerial Iege Q Copyright USr7A NAP Figure 5.39 Thornton Water Project L__1 TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared for: C ily el Thornton File: 03241 Figure 31041 Werd.mxd dtHI :anuary 26. 2021 ERG) Aerial Iege Q Copyright USr7A NAP ;t7Rhirite% Ikon)* 01,41\ kfra, *at Iterict itta tio, Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony O O Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5.40 Wildlife Prepared for: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dtHI :anuary 26. 2021 ERG) Aerial Iege Q Copyright USr7A NAP - N s?IrreSirse enr ►': Aka tsar" A Feel I 1SG 300 it\ J Thornton Water Project TWP Work limits Q TWP Study Buffer Prairie Dog Colony C 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5.41 Prepared run City of Thornton File:05241 Figure 51041 Weld.mxd dtHI :a n ua ry 26, 2021 ERG) Leo Aerial Imcge: 9 Copyright U5I3A NAP Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5.42 JildUfe Prepared fo•: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dIHI :anuary 26. 2021 ERG) eeo r✓.C�t' a L.. ,. Aerial Iege Q Copyright USr7A NAP Figure 5.43 Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony I {; 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared run City of Thornton File:05241 Figure 51041 Weld.mxd dtHI :a n ua ry 26, 2021 ERG) Aerial Icge: 9 Copyright USr7A NAP 1 4 t t tl it "tom Its -1 I I I p I I I I I I I I I Gaul 0 N Thornton Water Project TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5.44 Prepared fry: City of Thornton File:03241 Figure 31041 Werd.mxd dtHI :anuary 26, 2021 ERG) CCOI' 1. r= L.. ,. Aerial Iege Q Copyright USr7A NAP 4. r- ES ,—.4000- • 1 4, S IIt _f * a tAte"' . :au es.allmisrmilt 4; 1 LYrf I I I I 1 I 8 I JI I • 1 1 1 S - • T'vernArcirrts tz at •= min sin s a tattT1rT flivirrekinP Figure 5.45 Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration 4 OW g 4 Prepared fo•: CiLy of Thornton File: 03241 Figure 31041 Weld.mxd dtHI :anuary 26, 2021 ERG) Aerial Iege Q Copyright U50A NAP eeo r✓.C�t r= L�'L. Figure 5.46 Thornton Water Project TWP Work limits TWP Study Buffer Prairie Dog Colony •Y❖.•.*: 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared fo•: City of Thornton File: 05241 Figure 51041 Weld.mxd dIHI ianuary 26, 2021 ERG) Aerial Iege Q Copyright USr7A NAP Figure 5.47 a, me Thornton Water Project TWP Work limits TWP Study Buffer Prairie Dog Colony •Y❖.•.*: 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared roar: City of Thornton File:05241 Figure 51041 WeFd.mxd dtHI :anuary26,2921 ERG) Leo I'1.Y.:L.. Aerial Iege Q Copyright USr7A NAP T'NP Work limits TWP Study Buffer Prairie Dog Colony Aerial km le: 9 Copyright USIA N'AIP Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration 1lnYT 'MSY'.T Prepared run City of Thornton File: 05241 Figure 51041 Weld.mxd lr,j January 26, 2021 Thornton Water Project L__1 TWP Work limits TWP Study Buffer Prairie Dog Colony •Y❖.•.*: 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5.49 Wildlife Prepared for: C ily el Thornton File: 03241 Figure 31041 Werd.mxd dIHI :anuary 26. 2021 ERG) COe Aerial Imcge: © Copyright U5l3A NAP Bald Eagle Nest Observed by ERO Raptor Nest Observed by ER0 Preble`s Evaluated - Not Trapped Prepared fo•: C ily of Thornton File: 03241 Figure 31041 Werd.mxd dIHI :anuary 26, 2021 Thornton Water Project L__1 TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range V C d C V U Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 531 WMIdlife Prepared for: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dtHI :anuary 26. 2021 ERG) Aerial Iege Q Copyright USr7A NAP Thornton Water Project L__1 TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 532 WMIdlife Prepared for: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dtHI :anuary 26. 2021 ERG) Aerial Iege Q Copyright USr7A NAP .T a. Figure 5.53 Cil Thornton Water Project TWP Work limits TWP Study Buffer Prairie Dog Colony •Y❖.•.*: 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range I a ty.IRasd4 - Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared roar: City of Thornton File:05241 Figure 51041 WeFd.mxd dtHI :anuary26,2921 ERG) CQ.0 . ,s C Aerial Iege Q Copyright USr7A NAP Thornton Water Project T'NP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range IYA Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 534 WMIdlife Prepared run City of Thornton File:05241 Figure 51041 Weld.mxd lHj January 26, 2021 ERQ Aerial Imcge: 9 Copyright USIA NAIP It/P Work limits FWP Study Buffer Prairie Dog Colony Aerial Imese: © Copyright USDA N'AIP Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared Fun City or Thornton File:05241 Figure 51041 Weld.mxd c IHj January 2g, 2021 Thornton Water Project it L It/P Work limits MP Study Buffer Prairie Dog Colony a a Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range CCM r-• Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 536 Wildlife Prepared Fun City or Thornton File:05241 Figure 51041 Weld.mxd c IHj January 2g, 2021 300 Feel Aerial image: © Copyright USDA N'AIP Figure 5.57 Thornton Water Project LTWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared run City of Thornton File:05241 Figure 51041 Weld.mxd dtHI January 2g, 2021 ERG) Aerial Icge: 9 Copyright USr7A NAP Figure 5.58 LI 41. 41 d 3: Thornton Water Project TWP Work limits TWP Study Buffer Prairie Dog Colony Bald Eagle Nest Observed by ERO ':`' Raptor Nest Observed by ERO 0 0 Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared run City or Thornton File:05241 Figure 51041 Weld.mxd dtHI January 2g, 2021 Aerial Icge: 9 Copyright U5I3A N!AIP CCOP✓.c —.g Cc . Figure 5.59 Thornton Water Project TWP Work limits TWP Study Buffer Prairie Dog Colony •Y❖.•.*: 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared for.: City of Thornton File:05241 Figure 51041 Weld.mxd dtHI :a n ua ry 26, 2021 ERG) Aerial Iege Q Copyright USr7A NAP Figure 5.60 Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared fo•: C ily el Thornton File: 03241 Figure 31041 Weld.mxd dIHI :anuary 26. 2021 ERG) eeo r✓.C�t' r. L.. ,. Aerial Iege Q Copyright USr7A NAP Thornton Water Project rr "ON TWP Work limits TWP Study Buffer Prairie Dog Colony D Bald Eagle Nest Observed by ERO Bald Eagle Nest Site Raptor Nest Observed by ERO Bald Eagle Roost Site Preble`s Evaluated - Not Trapped Preble's Trapped - Not Found Preble"s Occupied Range Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5.61 Wildlife D Prepared Fun City or Thornton File:05241 Figure 51041 Weld.mxd Al January 2g, 2021 ERG) cco FAtc".-z-hiCc . Aerial Image: © Copyright USDA N'AIP Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Prepared run City of Thornton File:05241 Figure 51041 Wefd.mxd lHj January 26, 2021 Figure 5.63 Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony larting 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Prepared run City of Thornton File:05241 Figure 51041 Weld.mxd :dill :anuary26,2021 ERG) Aerial Imcge: 9 Copyright U50A NAP i 1; .rt N rrai is 300 Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony •Y❖.•.*: 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration Figure 5.64 Prepared run City of Thornton File:05241 Figure 51041 Weld.mxd dtHI January 2g, 2021 ERG) Aerial Icge: 9 Copyright USr7A NAP Thornton Water Project L__] TWP Work limits TWP Study Buffer Prairie Dog Colony 0 0 Bald Eagle Nest Observed by ERO Raptor Nest Observed by ERO Preble's Evaluated - Not Trapped Preble's Trapped - Not Found Preble's Occupied Range Bald Eagle Nest Site Bald Eagle Roost Site Bald Eagle Communal Roost Bald Eagle Winter Forage Bald Eagle Winter Concentration mmitimmOSSEFOali Figure 5.65 Prepared for.: City of Thornton File:05241 Figure 51041 Weld.mxd dtHI :a n ua ry 26, 2021 Aerial Iege Q Copyright USr7A NAP Bald Eagle Nest Observed by ERO Raptor Nest Observed by ER0 Preble's Evaluated - Not Trapped Preble"s Trapped - Not Found Preble"s Occupied Range Prepared Fun City or Thornton File:05241 Figure 51041 Weid.rnxd :c'IHI January 26, 2021 0 U- N n C 4, O C C"9 a C" y t C C Maps' 2010 104 c Fort CO n si. VrInce Bran dl Mspmr a pM. I tr' hl l l Thornton Water Project TWP Work Limits TWP Study Buffer 1 r' llrvI era1 Rd t Adif twe C.77, Berth U d aklaitl Airport Er !el !VI u1111 LIP +A irpi7r 'Lafayet''e Canada Goose Winter Concentration Area Pronghorn Overall Range Osprey Foraging Area CI Wild Turkey Production Area Canada Goose Brood Concentration Area River Otter Overall Range WCanada Goose Production Area Greater Prairie Chicken Historic Range 0 15,000 30,000 Feet ',III! tt € a1'ton Pia '.. Valley kkpark Figure 6 General Wildlife Overview Prepared for: City of Thornton File: 05241 Figure 6 1041 Weld.mxd [dIH] January 26, 2021 ERA ERO R ource:_vs: Coro. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright it? 2026 ESRI and its licensors. An rights reserved. LL Lr. Water Project TWP Work Limits TWP Study Buffer White -Tailed Deer Concentration Area White -Tailed Deer Winter Range ►vt r? pH Rd Be rtci Mule Deer Concentration Area Mule Deer Resident Population Area Mule Deer Winter Concentration Area Mule Deer Severe Winter Range Mule Deer Winter Range 0 15,000 N 30,000ill\ Feet PLEAFAlIIT VAttF'r E.>frtQ, Va4teyr .Vifirst- Ai.rncvtly Mafia 'aFle flair poi -1 4��ZS Y1 1 �AWe las Airport Figure 7 Mule Deer and White -Tailed Deer Overview Prepared for: City of Thornton File: 05241 Figure 7 1041 Weld.mxd [dIH] January 26, 2021 ERA [' O R oar::ens: Coro. Portions of this document include intellectual property of ES RI and its licensors and are used herein under license. Copyright it? 2026 ESRI and its licensors. All rights reserved. E 0 Update 05241 FigureAl CR 3 Q t0 L U P-0 Y Et r 4.. v 0 z a C L 4 r r IL7 U) o .r.. U 9) 2 L 0- 0 4 (N LPL ,..a CL Signal lees No ,eservoit tk I Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, TM, R67W; Sections 4 and 5, T1S, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, T3N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 1:24,000 0 1,000 2,000 feet o i Acres Smith S Figure Si OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld..mxd [d'HI January 27, 2021 ERC.) E'(O R,zaurcas Coro. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. z 9 cr, so 2 ca Path P:`5200 P Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer 1 17 2 ci Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, T1N, R67W; Sections 4 and 5, T15, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, 13N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 1:24,000 0 1,000 2,000 feet N I Figure 82 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld,.mxd Id 'HI January 27, 2021 ERC.) E'(O R,zaurcas Coro. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. X E 4 Update'05241 FigureAl CR 1 N 4 N (0 i_ 3 9 f N 2 0 z a 0 C L 0 N In w U O Path: P:10200 P K i C - Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer r 1 N 4. PJ B d + Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, T1N, R67W; Sections 4 and 5, T1S, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, 13N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 0 1:24,000 1,000 2,000 feet Figure 8.3 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld,.mxd [d'HI January 27, 2021 ERC.) E'(O R,zaurcas Coro. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. a E ajcct\Maps\Cu z a 0 C L 0 stone Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer WL.R.NR19 Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, TM, R67W; Sections 4 and 5, T1S, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, 13N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 1:24,000 0 1,000 2,000 feet Figure 84 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld,.mxd [d'HI January 27, 2021 ERC.) E'(O R,zaurcas Coro. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. E 0 Update 05241 FigureAl CR 3 Q t0 aject\Maps\Cu Path: P:\5200 P Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer SWL.3044 5WL,3043 5WL.1526 Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, TM, R67W; Sections 4 and 5, T1S, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, 13N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 0 1:24,000 1,000 2,000 feet Figure 83 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld,.mxd [d'HI January 27, 2021 ERC.) E'(O R,zaurcas Coro. Portions of this document include intellectual property of ES RI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. E 0 Update 05241 FigureAl CR 3 Q t0 aject\Maps\Cu z a 0 L 0 to C) 4, O Path: P:1S200 P MC.R.R14 WL.CH.NRSS WL.C H . N R44 Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer MC,CH.R1,75 Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, T1N, R67W; Sections 4 and 5, T15, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, T3N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 0 1:24,000 1,000 2,000 feet Figure 8.6 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld. mxd [d'HI January 27, 2021 ERC.) E'(O R,zaurces Coro. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. E e Al CR 1041 W Update'05241 Figu aject\Maps\Cu Path: P:10200 P Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer MC.R.R14 . R . R14 Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, TM, R67W; Sections 4 and 5, T1S, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, T3N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 0 1:24,000 1,000 2,000 feet Figure 87 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld,.mxd Id 'HI January 27, 2021 ERC.) E'(O R,zaurcas Coro. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. D E Update 05241 FigureAl CR 1041 W uraA2021 1041 oject\Maps\Cu z a 0 IO Path: P:6200 Projects\52 Previously Recorded Surveys TWP Work Limits Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, TM, R67W; Sections 4 and 5, T1S, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, 13N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 1:24,000 0 1,000 2,000 feet Figure 8.8 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld,.mxd Id 'HI January 27, 2021 ERC.) E'(O R,zaurcas Coro. Portions of this document include intellectual property of ES RI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. z a L O Path P:\5200 Projects\52 / ;I!7p l U 1r T �1 Previously Recorded Sites Previously Recorded Surveys Hal. " 1/4\TWP Work Limits TWP Study Buffer 50 i .p 4969 pirar`li9 Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, T1N, R67W; Sections 4 and 5, T15, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, 13N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 1:24,000 0 1,000 2,000 feet 5WL.868 5WL.841.15 WL.CH.R6 Figure 8.9 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld,.mxd Id 'HI January 27, 2021 ERC.) E'(O R,zaurcas Coro. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. E 0 Figure Al CR Update'05241 3 Q (13 aject\Maps\Cu z a Q }P 1 V O Path: P:16200 P Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, T1N, R67W; Sections 4 and 5, T15, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, T3N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 1:24,000 0 1,000 2,000 feet Figure 8.10 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld. mxd [d'HI January 27, 2021 ERC.) E'(O R,zaurcas Coro. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. E O Update 05241 FigureAl CR 3 4 CO aject\Maps\Cu In U 2 L U- O Q 0_ 0_ 5WL.898.8 ACS TERN Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, T1N, R67W; Sections 4 and 5, T1S, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, 13N, R67W; Sections 6, 7, 8, 17, 18, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 1:24,000 0 1,000 2,000 feet Figure 811 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld,.mxd [dlH[ January 27, 2021 ERC.) E'(O R,zaurces Coro. Portions of this document include intellectual property of ES RI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. E O Update'05241 FigureAl CR 3 Q IN ajeet\Maps\Cu C Path: P:\5200 P - ._ -•e *996 5 LR .9385 TO aWs 4889 Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer 5WL.315 Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, TM, R67W; Sections 4 and 5, T1S, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, 13N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 1:24,000 0 1,000 2,000 feet -0,klahorna Scheipi Figure 8.12 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld,.mxd [d'HI January 27, 2021 ERC.) E'(O R,zaurcas Coro. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. Update 05241 FigureAl CR 1041 Weld.mxd r 1 N 4 C m I' 1 a a 25 U 9 Thish r a) r Path: P:15200 Projects\5241 Thornton N haled mobs z c ■ Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer M 4 799 "N1/4\1<Nlbe Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, T1N, R67W; Sections 4 and 5, T15, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, 13N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 1:24,000 1,000 2,000 feet It Is, a 1. * M a 4 S U 4. jelly 17 • 437916 ►1 n' It to p t ti u rd7,� 0 iJ . • to 0 Ita a r`. . taa`ook a! • At \\,1. ' • 4 is!,11 l5{ 3 Figure 813 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld,.mxd [d'HI January 27, 2021 ERC.) E'(O R,zaurces Coro. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. ajcct\Maps\Cu Path: P:15200 P 5LR.995 Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer • FL Is 4.8'7 WL.CH . N R'9 Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, T1N, R67W; Sections 4 and 5, T15, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, 13N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 1:24,000 0 1,000 2,000 feet Figure 814 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld. mxd Id 'HI January 27, 2021 ERC.) E'(O R,zaurces Coro. Portions of this document include intellectual property of ES RI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. D E Update'05241 FigureAl CR 1041 W aject\Maps\Culturallt2021 1041 z a 0 0 O Path: P:10200 P J4P.15 Dea dma Pt \ Lake Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, T1N, R67W; Sections 4 and 5, T15, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, 13N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 1:24,000 0 1,000 2,000 feet Figure 815 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld,.mxd Id 'HI January 27, 2021 ERC.) E'(O R,zaurcas Coro. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. E 0 Update 05241 FigureAl CR O Path: P:1S200 P AND Woods =` i Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer dl - are,s - SO +THERM 3129 MC. E. R73 MCCH.R141 Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21,, 28, 29, 32, and 33, TM, R67W; Sections 4 and 5, T1S, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, 13N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 0 1:24,000 1,000 2,000 feet Figure 816 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld,.mxd [d'HI January 27, 2021 ERC.) E'(O R,zaurcas Coro. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. D x E Update'05241 Figure Al CR 1041 W 3 Q eject\Maps\Cu z a Q �-a C L O 0,1 in U) Q 4, Path: P:\5200 P COBB LA KE 5,39 es/Go Previously Recorded Sites Previously Recorded Surveys TWP Work Limits TWP Study Buffer Thornton Water Project Sections 4, 5, 8, 9, 16, 17, 20, 21, 28, 29, 32, and 33, TM, R67W; Sections 4 and 5, T1S, R67W; Sections 4, 5, 8, 9, 16, 17, 30, 2.1, 28, 29, 32, and 33, T2N, R67W; Sections S, 8, 17, 20, 21, 28, 29, 32, and 33, 13N, R67W; Sections 6, 7, 8, 17, 1.8, 19, 20, 29, 30, and 32, T4N, R67W; Sections 1 and 12, T4N, R68W; Sections 6, 7, 18, 19, 30, and 31, T6N, R67W; Sections 6, 7, 18, 19, 30, and 31, T7N,R67W; Sections 18, 19, 30, and 31, T8N, R67W; 6th PM USGS Frederick (1980), Cobb Lake (1980), Timnath (1973), Windsor (1970), Johnstown (1970), Gowanda (1980), CO Quadrangles (1:24,000) Weld County, Colorado 1:24,000 0 1,000 2,000 feet 0+1.45249 Figure 817 OAHP File Search Results Prepared for: City of Thornton File: 05241 Figure Al CR 1041 Weld,.mxd [dlH[ January 27, 2021 ERC.) E'(O R,zaurcas Coro. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright C 2021 ESRI and its licensors. All rights reserved. Hello