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NPW Connections Project Non-Potable Water Connections Project Biological Resources Assessment prepared for Coachella Valley Water District 75-515 Hovley Lane East Palm Desert, California 92211 Contact: Elizabeth Meyerhoff, Environmental Specialist prepared with the assistance of Rincon Consultants, Inc. 180 North Ashwood Avenue Ventura, California 93003 April 2018 Table of Contents Table of Contents 1 Introduction .....................................................................................................................................1 1.1 Project Location ................................................................................................................... 1 1.2 Project Description ............................................................................................................... 1 2 Methodology ...................................................................................................................................5 2.1 Regulatory Setting ................................................................................................................ 5 2.1.1 Environmental Statutes .......................................................................................... 5 2.1.2 Guidelines for Determining CEQA Significance ....................................................... 6 2.2 Database and Literature Review .......................................................................................... 6 2.3 Focused Biological Field Survey ........................................................................................... 7 3 Existing Conditions ...........................................................................................................................8 3.1 Topography and Soils ........................................................................................................... 8 3.2 Land Cover and Vegetation .................................................................................................. 8 3.3 General Wildlife ................................................................................................................... 9 4 Sensitive Biological Resources ...................................................................................................... 16 4.1 Special Status Plant Species ...............................................................................................17 4.2 Special Status Wildlife Species ...........................................................................................17 4.3 Designated Critical Habitat ................................................................................................18 4.4 Sensitive Plant Communities .............................................................................................18 4.5 Jurisdictional Waters and Wetlands ..................................................................................18 4.6 Wildlife Movement ............................................................................................................18 4.7 Local Policies and Tree Protection .....................................................................................19 4.8 Conservation Plans .............................................................................................................19 5 Impact Analysis and Mitigation Measures .................................................................................... 22 5.1 Special Status Plant Species ...............................................................................................22 5.2 Special Status Wildlife Species ...........................................................................................22 5.3 Nesting Birds ......................................................................................................................22 5.4 Sensitive Vegetation Communities ....................................................................................23 5.5 Jurisdictional Waters and Wetlands ..................................................................................23 5.6 Wildlife Movement ............................................................................................................23 5.7 Local Policies and Tree Protection .....................................................................................23 5.8 Adopted or Approved Plans ...............................................................................................24 6 Limitations, Assumptions, and User Reliance ............................................................................... 25 Biological Resources Assessment i Coachella Valley Water District Non-Potable Water Connections Project 7 References .................................................................................................................................... 26 Bibliography ...................................................................................................................................26 List of Preparers .............................................................................................................................27 Figures Figure 1 Regional Project Location ....................................................................................................3 Figure 2 Project Location- Overview ..................................................................................................4 Figure 3a Project Alignment ............................................................................................................. 10 Figure 3b Project Alignment ............................................................................................................. 11 Figure 3c Project Alignment ............................................................................................................. 12 Figure 3d Project Alignment ............................................................................................................. 13 Figure 3e Project Alignment ............................................................................................................. 14 Figure 3f Project Alignment ............................................................................................................. 15 Figure 4 Coachella Valley MSHCP ................................................................................................... 21 Appendices Appendix A Regionally Occurring Special Status Species Appendix B Representative Site Photographs Appendix C Plant and Wildlife Species Observed Onsite ii Introduction 1 Introduction Rincon Consultants, Inc. (Rincon) prepared this Biological Resources Assessment (BRA) report to document the current existing conditions within the project site and to evaluate the potential for project-related impacts to biological resources during implementation of the Non-Potable Water (NPW) Connections Project (project). Coachella Valley Water District (CVWD) is the project’s responsible lead agency. The project is located in the City of Palm Desert in Riverside County, California. 1.1 Project Location The project is located less than 2 miles south of Interstate 10 in the City of Palm Desert, California, in the center of Riverside County (Figure 1). The City is surrounded by the cities of Rancho Mirage to the west, Indian Wells to the south, and Bermuda Dunes to the east. The project site is depicted in Figure 2. The proposed project would be located mostly within existing paved roads and embankments in residential and commercial areas. It is depicted on Township 5S, Range 6E, Sections 10-15 of the U.S. Geological Survey La Quinta and Myoma, CA 7.5-minute topographic quadrangles, San Bernardino Baseline and Meridian. 1.2 Project Description The proposed project involves the construction and operation of approximately 9.4 miles of non- potable water (NPW) pipeline segments and connections to provide irrigation water for seven local golf courses, one RV resort, one planned future development, and replacement of an existing pump station for a total pumping capacity of approximately 12,000 gpm for the low pressure system and 12,000 gpm for the high pressure system. The proposed NPW end users currently use groundwater or CVWD-supplied potable water for irrigation. The proposed project would deliver a blend of NPW from CVWD’s existing WRP10 facility and Colorado River water from the MVP terminus at WRP10. CVWD’s WRP10 facility is located at 43000 Cook Street in Palm Desert. The proposed project would install approximately 50,000 linear feet (LF) of non-potable pipeline within public right-of-way and private lands in Palm Desert and unincorporated Bermuda Dunes. The majority of the pipeline alignment (approximately 40,000 LF) would be placed in Palm Desert, with approximately 10,000 LF of pipeline extending east into unincorporated Bermuda Dunes. In locations where new NPW distribution pipes would be installed parallel to existing NPW pipelines, those new pipelines would serve to increase capacity of the NPW distribution system. The new pipelines would increase the NPW distribution network from approximately 26.6 miles to 36 miles. The proposed new NPW users to be served under the proposed project are listed below: 1. Marriott Shadow Ridge 2. Marriott Desert Springs Resort (North) 3. Emerald Desert RV Resort 4. Oasis Country Club Biological Resources Assessment 1 Coachella Valley Water District Non-Potable Water Connections Project 5. Palm Desert Resort Country Club 6. Woodhaven Country Club 7. Bermuda Dunes Country Club Additionally, an eighth
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