Initial Study for the San Jacinto River Stage 3 Master Drainage Plan Prepared for October 2019 www.webbassociates.com INITIAL STUDY FOR THE SAN JACINTO RIVER STAGE 3 MASTER DRAINAGE PLAN Prepared for: Riverside County Flood Control and Water Conservation District 1995 Market Street Riverside, California 92501 Contact: Kevin Cunningham (951) 955-1526 Prepared by: Albert A. Webb Associates 3788 McCray Street Riverside, CA 92506 Contact: Stephanie Standerfer Vice President (951) 686-1070 October 2019 TABLE OF CONTENTS ENVIRONMENTAL CHECKLIST FORM ................................................................................................................... 1 1. PROJECT TITLE ....................................................................................................................................................... 1 2. LEAD AGENCY NAME AND ADDRESS ........................................................................................................................... 1 3. CONTACT PERSON EMAIL ADDRESS AND PHONE NUMBER ............................................................................................... 1 4. PROJECT LOCATION ................................................................................................................................................ 1 5. PROJECT SPONSOR’S NAME AND ADDRESS .................................................................................................................. 1 6. GENERAL PLAN DESIGNATION .................................................................................................................................. 1 7. ZONING ............................................................................................................................................................... 1 8. BACKGROUND AND PROJECT DESCRIPTION ................................................................................................................. 2 9. POTENTIAL FUTURE FACILITIES ................................................................................................................................. 4 10. SURROUNDING LAND USES AND SETTING .................................................................................................................... 6 11. RESPONSIBLE AGENCIES .......................................................................................................................................... 6 12. OTHER PUBLIC AGENCIES WHOSE APPROVAL IS REQUIRED .............................................................................................. 7 13. CALIFORNIA NATIVE AMERICANS TRIBES CONSULTED ...................................................................................................... 8 ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED: ........................................................................................ 16 DETERMINATION: (TO BE COMPLETED BY THE LEAD AGENCY) ........................................................................... 16 EVALUATION OF ENVIRONMENTAL IMPACTS: ................................................................................................... 17 1. AESTHETICS ............................................................................................................................................................. 18 2. AGRICULTURAL AND FORESTRY RESOURCES .......................................................................................................... 21 3. AIR QUALITY............................................................................................................................................................ 23 4. BIOLOGICAL RESOURCES ........................................................................................................................................ 26 5. CULTURAL RESOURCES ........................................................................................................................................... 30 6. ENERGY ................................................................................................................................................................... 31 7. GEOLOGY AND SOILS .............................................................................................................................................. 32 8. GREENHOUSE GAS EMISSIONS. .............................................................................................................................. 39 9. HAZARDS AND HAZARDOUS MATERIALS. ............................................................................................................... 40 10. HYDROLOGY AND WATER QUALITY. ....................................................................................................................... 45 11. LAND USE PLANNING. ............................................................................................................................................. 48 12. MINERAL RESOURCES. ............................................................................................................................................ 49 13. NOISE. ..................................................................................................................................................................... 51 14. POPULATION AND HOUSING. ................................................................................................................................. 53 15. PUBLIC SERVICES. ................................................................................................................................................... 54 16. RECREATION. .......................................................................................................................................................... 56 17. TRANSPORTATION. ................................................................................................................................................. 57 18. TRIBAL CULTURAL RESOURCES ............................................................................................................................... 60 19. UTILITIES AND SERVICE SYSTEMS. .......................................................................................................................... 61 20. WILDFIRE ................................................................................................................................................................ 63 21. MANDATORY FINDINGS OF SIGNIFICANCE ............................................................................................................. 65 REFERENCES ...................................................................................................................................................... 67 List of Figures Figure 1– Regional Map .................................................................................................................................................................... 9 Figure 2 – Aerial Map ...................................................................................................................................................................... 10 Figure 3 – USGS Map ...................................................................................................................................................................... 11 Figure 4 – General Plan Land Use Map ........................................................................................................................................... 12 Figure 5 – Zoning Map .................................................................................................................................................................... 13 October 2019 Initial Study i San Jacinto Stage 3 Master Drainage Plan Figure 6A – SJR3 MDP Elements ..................................................................................................................................................... 14 Figure 6B – Embankment and Flow Control Structure Upstream of the I‐215 Freeway Improvements ........................................ 15 Figure 7 – Reserve Features and Criteria Cell ................................................................................................................................ 29 List of Tables Table 1 – Surrounding Land Uses ...................................................................................................................................................... 8 October 2019 Initial Study ii San Jacinto Stage 3 Master Drainage Plan ACRONYMS LIST Acronym Definition AB 52 Assembly Bill 52 AQMP Air Quality Management Plan BMPs Best Management Practices Cal Fire California Department of Forest and Fire Protection Caltrans California Department of Transportation CDFW California Department of Fish and Wildlife CEQA California Environmental Quality Act City City of Perris CLOMR Conditional Letter of Map Revision Committee Lower San Jacinto River Advisory Committee County County of Riverside CWA Clean Water Act District Riverside County Flood Control and Water Conservation District DOC California Department of Conservation DTSC California Department of Toxic and Substance Control EMWD Eastern Municipal Water District EPA U.S. Environmental Protection Agency FEMA Federal Emergency Management Agency GHG Greenhouse Gas I-215 Interstate 215 LESA Land Evaluation and Site Assessment Model MDP San Jacinto River Stage 3 Master Drainage Plan MRZ Mineral Resources Zone MS4 Municipal separate storm water sewer system MSHCP Western Riverside