Biological Resources Evaluation for the Dos Osos Reservoir Replacement Project Orinda, California July 20, 2016 Prepared For: East Bay Municipal Utility District 375 11th St Oakland, MS 701, CA 94607 510-287-1086 [email protected] Prepared By: Jessica Purificato Fisheries and Wildlife Division East Bay Municipal Utility District 500 San Pablo Dam Rd Orinda, CA 94563 510-287-2034 [email protected] Table of Contents 1.0 INTRODUCTION ....................................................................................................................................... 5 1.1 Project Setting ..................................................................................................................................... 5 1.2 Proposed Project Description .............................................................................................................. 5 2.0 REGULATORY BACKGROUND .................................................................................................................. 7 2.1 Special Status Biological Communities ................................................................................................ 7 Waters of the United States ................................................................................................................. 8 Waters of the State ............................................................................................................................... 8 Streams, Lakes, and Riparian Habitat ................................................................................................... 8 Sensitive Natural Communities ............................................................................................................. 9 Wildlife Movement Corridors ............................................................................................................... 9 2.2 Special Status Species ......................................................................................................................... 9 Federal Endangered Species Act ......................................................................................................... 10 California Endangered Species Act ..................................................................................................... 10 California Environmental Quality Act.................................................................................................. 10 Migratory Bird Treaty Act ................................................................................................................... 11 2.3 Conservation Plans ............................................................................................................................ 11 2.4 Local Policies and Ordinances ........................................................................................................... 11 3.0 METHODS .............................................................................................................................................. 12 3.1 Biological Communities ..................................................................................................................... 12 3.2 Special Status Species ....................................................................................................................... 13 3.3 Conservation Plans ............................................................................................................................ 14 4.0 FINDINGS ............................................................................................................................................... 14 4.1 Biological Setting............................................................................................................................... 14 Climate ................................................................................................................................................ 14 Soils ..................................................................................................................................................... 14 Vegetation and Habitat Communities ................................................................................................ 15 4.2 Sensitive Biological Communities ...................................................................................................... 17 Wetlands, Waters and Riparian Habitat ............................................................................................. 17 Sensitive Natural Communities ........................................................................................................... 17 Wildlife Movement Corridors ............................................................................................................. 17 4.3 Sensitive Plant Species ...................................................................................................................... 18 Dos Osos Reservoir Replacement Project 2 Biological Resources Evaluation 4.4 Sensitive Wildlife Species .................................................................................................................. 23 Amphibians ......................................................................................................................................... 23 Reptiles................................................................................................................................................ 24 Birds .................................................................................................................................................... 26 Fish ...................................................................................................................................................... 27 Mammals ............................................................................................................................................ 28 Invertebrates ....................................................................................................................................... 30 4.5 Conservation Plans ............................................................................................................................ 32 5.0 POTENTIAL IMPACTS ............................................................................................................................. 33 5.1 Biological Communities ..................................................................................................................... 33 Wetlands, Waters and Riparian Habitat ............................................................................................. 33 Sensitive Natural Communities ........................................................................................................... 33 Wildlife Movement Corridors ............................................................................................................. 33 5.2 Special Status Species ....................................................................................................................... 34 General Avoidance and Minimization Measures ................................................................................ 34 Sensitive Plant Species ........................................................................................................................ 34 Nesting Special Status Bird Species..................................................................................................... 35 Special Status Bat Species ................................................................................................................... 35 Alameda whipsnake ............................................................................................................................ 36 San Francisco Dusky-Footed Woodrat ................................................................................................ 36 Bridge’s coast range shoulderband..................................................................................................... 37 5.3 Conservation Plans ............................................................................................................................ 37 6.0 CONCLUSIONS AND RECOMMENDATIONS ........................................................................................... 37 7.0 REFERENCES .......................................................................................................................................... 39 8.0 REPORT FIGURES ................................................................................................................................... 43 Appendix A: ................................................................................................................................................. 46 List of Plant and Animal Species identified within 5 miles of the project site by CDFW in the California Native Diversity Database and by USFWS in the Official Species List for the Dos Osos Reservoir Placement Project ....................................................................................................................................... 46 Appendix B: ................................................................................................................................................. 58 List of Plant Species identified in the CNPS Rare or Endangered Plant Inventory, The Rare, Unusual or Significant Plants of Alameda or Contra Counties and EBMUD’s Managed Species Database for the Dos Osos Reservoir