LOWER SHERMAN ISLAND WILDLIFE AREA LAND MANAGEMENT PLAN FINAL APRIL 2007 iÿPWA EDAW ranr HILLIJVIbJMKWII LOWER SHERMAN ISLAND WILDLIFE AREA LAND MANAGEMENT PLAN FINAL PREPARED FOR: CAUFORNIA DEPARTMENT OF FISH AND GAME SACRAMENTO VALLEY CENTRAL SIERRA REGION 1701 NIMBUS ROAD, SUITE A RANCHO CORDOVA, CA 95670 CONTACT; SARAHDLM AREA MANAGER 916/353-2881 PREPARED BY: EDAW 2022 J STREET SACRAMENTO, CAUFORNIA 95814 CONTACT; JOHN HUNTER 916/414-5800 APRIL 2007 EDAW ig/PWA FINAL LAND MANAGEMENT PLAN FOR THE LOWER SHERMAN ISLAND WILDLIFE AREA PREPARED FOR: California Department of Fish and Game Sacramento Valley Central Sierra Region 1701 Nimbus Road, Suite A Rancho Cordova, CA 95670 PREPARED BY: EDAW, Inc. 2022 J Street Sacramento, CA 95814 Phone: (916)414-5800 APPROVED BY: Acting Regional Manager, Bay-Delta Region Date Date TABLE OF CONTENTS Chapter Page EXECUTIVE SUMMARY............................................................................................................................... ES-1 Purpose and History of Acquisition ........................................................................................................ES-2 Property Description and Management Setting.......................................................................................ES-2 Environmental Setting.............................................................................................................................ES-2 Management Goals................................................................................................................................ES-13 Operations and Maintenance .................................................................................................................ES-14 Future Revisions....................................................................................................................................ES-14 Environmental Review ..........................................................................................................................ES-15 1 INTRODUCTION................................................................................................................................... 1-1 1.1 Mission of the Department ........................................................................................................... 1-1 1.2 Purpose of Wildlife Areas ............................................................................................................ 1-1 1.3 Purpose of Acquisition ................................................................................................................. 1-3 1.4 Acquisition History...................................................................................................................... 1-3 1.5 Purpose of Land Management Plan.............................................................................................. 1-4 1.6 The Planning Process ................................................................................................................... 1-5 1.7 Environmental Analysis ............................................................................................................... 1-5 1.8 Organization of This Land Management Plan.............................................................................. 1-5 2 PROPERTY DESCRIPTION AND MANAGEMENT SETTING..................................................... 2-1 2.1 Geographical Setting .................................................................................................................... 2-1 2.2 Adjacent Land Uses...................................................................................................................... 2-1 2.3 Property Boundaries and Easements ............................................................................................ 2-1 2.4 Existing Infrastructure.................................................................................................................. 2-2 2.5 Management Setting..................................................................................................................... 2-8 3 ENVIRONMENTAL SETTING 3.1 Geology, Soils, Topography, and Climate ................................................................................ 3.1-1 3.2 Water Resources........................................................................................................................ 3.2-1 3.3 Biological Resources of Aquatic Ecosystems ........................................................................... 3.3-1 3.4 Biological Resources of Riparian, Marsh, and Upland Ecosystems ......................................... 3.4-1 3.5 Cultural Resources .................................................................................................................... 3.5-1 3.6 Public Use................................................................................................................................. 3.6-1 4 MANAGEMENT GOALS...................................................................................................................... 4-1 4.1 Definition of Management Terms ................................................................................................ 4-1 4.2 Goals and Tasks for Elements ...................................................................................................... 4-2 5 OPERATIONS AND MAINTENANCE ............................................................................................... 5-1 5.1 Operations and Maintenance Tasks to Implement Plan ............................................................... 5-1 5.2 Existing Staff and Additional Personnel Needs ........................................................................... 5-1 5.3 Capital Equipment and Materials and Supplies............................................................................ 5-2 5.4 Funding Sources........................................................................................................................... 5-3 Lower Sherman Island Wildlife Area Land Management Plan EDAW California Department of Fish and Game i Table of Contents TABLE OF CONTENTS Page 6 FUTURE REVISIONS TO THIS PLAN .............................................................................................. 6-1 6.1 Minor Revisions........................................................................................................................... 6-1 6.2 Major Revisions........................................................................................................................... 6-1 6.3 Five Year Plan Status Reports...................................................................................................... 6-2 7 DOCUMENT PREPARERS.................................................................................................................. 7-1 7.1 California Department of Fish and Game .................................................................................... 7-1 7.2 EDAW.......................................................................................................................................... 7-1 8 LITERATURE CITED........................................................................................................................... 8-1 Appendices A Public Outreach Summary B Environmental Review C Legal Description of Property and Operating Agreement for Lower Sherman Island Public Access Facility D Lower Sherman Island Wildlife Area–Related Conservation Measures, Targets, and Programmatic Actions from the CALFED Ecosystem Restoration Program Plan and Multi- Species Conservation Strategy E Synthesis of Available Fisheries Data F Vascular Plant Species Observed or Likely to be Present at LSIWA G Bird Species Observed or Likely to be Present at LSIWA H Amphibian, Reptile, and Mammal Species Likely to be Present at LSIWA I Studies Conducted at or in the Vicinity of the Lower Sherman Island Wildlife Area EDAW Lower Sherman Island Wildlife Area Land Management Plan Table of Contents ii California Department of Fish and Game TABLE OF CONTENTS Page Exhibits 1-1 Regional Map............................................................................................................................................ 1-2 2-1 Study Area Aerial...................................................................................................................................... 2-3 2-2 Lower Sherman Island Wildlife Area USGS Topo Map........................................................................... 2-5 3.1-1 Earthquakes and Faults of the San Francisco Bay-Delta........................................................................ 3.1-2 3.1-2 San Francisco Bay Region Earthquake Probability................................................................................ 3.1-3 3.1-3 Soils of the Lower Sherman Island Wildlife Area ................................................................................. 3.1-6 3.1-4 Process of Subsidence ........................................................................................................................... 3.1-7 3.2-1 Conceptual Model of Organic Carbon Process in the Sacramento-San Joaquin Delta .......................... 3.2-6 3.3-1 The Bay-Delta Aquatic Community and Primary Food Web ................................................................ 3.3-2 3.4-1 Vegetation of the Lower Sherman Island Wildlife Area........................................................................ 3.4-3 3.4-2 CNDDB Special-Status Plant