MARTIS VALLEY GROUNDWATER BASIN SUSTAINABLE GROUNDWATER MANAGEMENT ACT ALTERNATIVE SUBMITTAL December 22, 2016 TABLE OF CONTENTS MARTIS VALLEY GROUNDWATER BASIN SGMA ALTERNATIVE SUBMITTAL ........................ 1 PART ONE: DESCRIPTION OF HYDROGEOLOGY OF MVGB ........................................................... 4 1. INTRODUCTION/OVERVIEW ...................................................................................................... 4 2. BASIN HYDROGEOLOGY ............................................................................................................ 4 2.1. Soils and Geology ......................................................................................................................... 4 2.2. Groundwater Recharge and Discharge ......................................................................................... 9 2.3. Groundwater in Storage .............................................................................................................. 14 3. DESCRIPTION OF BENEFICIAL USES...................................................................................... 14 PART TWO: BASIN MANAGEMENT ORGANIZATION AND PLAN ................................................ 15 1. GENERAL INFORMATION ......................................................................................................... 15 1.1. Summary of Management Approach, Organization of Partners, and General Conditions in the MVGB .................................................................................................................................................... 15 1.2. List of References and Technical Studies ................................................................................... 18 2. AGENCY INFORMATION Below is agency information for each of the six local SGMA agencies. .................................................................................................................................................. 18 2.1. Truckee Donner Public Utility District (TDPUD) ...................................................................... 18 2.2. Northstar Community Services District (NCSD) ........................................................................ 20 2.3. Placer County Water Agency (PCWA)....................................................................................... 22 2.4. Town of Truckee ......................................................................................................................... 24 2.5. Nevada County ............................................................................................................................ 26 2.6. Placer County .............................................................................................................................. 28 3. DESCRIPTON of MANAGEMENT PLAN .................................................................................. 30 3.1. Description of Area ..................................................................................................................... 30 3.2. Management Area Groundwater Conditions .............................................................................. 30 4. WATER BUDGET ......................................................................................................................... 41 4.1. Summary of Components............................................................................................................ 41 4.2. Change in Annual Storage .......................................................................................................... 41 4.3. Estimated Sustainable Yield ....................................................................................................... 41 4.4. Projected Water Budget .............................................................................................................. 42 5. WATER RESOURCE MONITORING PROGRAMS ................................................................... 42 6. WATER RESOURCE MANGEMENT PROGRAMS ................................................................... 44 6.1. Landuse Elements Related to Basin Management ...................................................................... 44 6.2. Recycled Water Production ........................................................................................................ 47 6.3. Conjunctive Use Program ........................................................................................................... 47 7. NOTICE AND COMMUNICATION ............................................................................................ 47 7.1. Description of Groundwater Users ............................................................................................. 47 7.2. Public Participation ..................................................................................................................... 48 7.3. Communications Plan ................................................................................................................. 49 8. INTRODUCTION TO SUSTAINABLE MANAGEMENT APPROACH .................................... 49 9. MANAGING GROUNDWATER LEVELS .................................................................................. 50 9.1. Groundwater Level Conditions ................................................................................................... 50 9.2. Description of Management Programs ....................................................................................... 50 9.3. Summary of Chronic Water Level Decline Sustainable Management Criteria .......................... 50 10. MANAGING BASIN STORAGE .............................................................................................. 52 10.1. Basin Storage Conditions ........................................................................................................ 52 10.2. Description of Management Programs.................................................................................... 52 10.3. Summary of Reduction in Groundwater Storage Sustainable Management Criteria .............. 52 11. MANAGING BASIN WATER QUALITY................................................................................ 52 11.1. Basin Water Quality Conditions ............................................................................................. 52 11.2. Description of Management Programs.................................................................................... 53 11.3. Summary of Degraded Water Quality Sustainable Management Criteria .............................. 53 12. MANAGING SEAWATER INTRUSION ................................................................................. 53 13. MANAGING LAND SUBSIDENCE ......................................................................................... 53 13.1. Basin Land Subsidence Conditions ......................................................................................... 53 13.2. Description of Management Programs.................................................................................... 53 13.3. Summary of Land Subsidence Sustainable Management Criteria .......................................... 53 14. MANAGING GROUNDWATER DEPLETIONS IMPACTING SURFACE WATER ............ 54 14.1. Basin Groundwater Depletions Impacting Surface Water Conditions .................................... 54 14.2. Description of Management Programs.................................................................................... 54 14.3. Summary of Depletions Impacting Surface Water Management Criteria .............................. 54 15. CONCLUSION ........................................................................................................................... 56 PART THREE: APPENDICES .................................................................................................................. 56 LIST OF FIGURES Figure 1: Martis Valley Groundwater Basin ................................................................................................ 5 Figure 2: Martis Valley Groundwater Basin Watershed .............................................................................. 6 Figure 3: Martis Valley Groundwater Basin Well Locations ...................................................................... 7 Figure 4: Martis Valley Groundwater Basin Geology ................................................................................. 8 Figure 5: Geological Stratigraphic Description ......................................................................................... 10 Figure 6: Cross Section A-A ...................................................................................................................... 11 Figure 7: Cross Section B-B ...................................................................................................................... 12 Figure 8: Cross Section C-C ...................................................................................................................... 13 Figure 9: MVGB Management Area ......................................................................................................... 16 Figure 10: MVGB Local SGMA Agencies Jurisdictional Boundaries ...................................................... 17 Figure 11: MVGB General and Community Plans .................................................................................... 31 Figure 12: MVGB Land Ownership .........................................................................................................