Mokelumne/Amador/Calaveras Integrated Regional Water Management Plan November 2006 Mokelumne/Amador/Calaveras Integrated Regional Water Management Plan Prepared by: Water and Environment November 2006 Mokelumne, Amador, and Calaveras IRWMP Table of Contents Executive Summary..................................................................................................................... i ES-1 Background and Authority........................................................................................... i ES-2 Local and Regional Integration .................................................................................. ii ES-3 Goals and Objectives .................................................................................................iii ES-4 Project Prioritization ...................................................................................................iii ES-5 Implementation.......................................................................................................... iv Chapter 1 Introduction ...........................................................................................................1-1 1.1 IRWMP Background................................................................................................1-1 1.2 IRWMP Standards ..................................................................................................1-2 Chapter 2 M/A/C IRWMP Development .................................................................................2-1 2.1 Resource Management & Coordination ..................................................................2-1 2.1.1 Regional Water Management & Coordination.........................................................2-1 2.1.2 Coordination with State and Federal Agencies .......................................................2-5 2.2 IRWMP Development Process................................................................................2-6 2.2.1 Region Definition.....................................................................................................2-7 2.2.2 IRWMP Goals and Objectives.................................................................................2-7 2.2.3 Project Identification................................................................................................2-7 2.2.4 Project Screening....................................................................................................2-7 2.2.5 Project Development...............................................................................................2-7 2.2.6 Project Prioritization ................................................................................................2-8 2.2.7 Plan Implementation ...............................................................................................2-8 Chapter 3 Regional Description ............................................................................................3-1 3.1 Watershed Description............................................................................................3-2 3.1.1 Mokelumne River Watershed..................................................................................3-3 3.1.2 Calaveras River Watershed ....................................................................................3-5 3.2 Ecological and Environmental Resources...............................................................3-5 3.3 Water-Related Infrastructure...................................................................................3-6 3.4 Political....................................................................................................................3-9 3.4.1 Counties..................................................................................................................3-9 3.4.2 Cities .......................................................................................................................3-9 3.4.3 Special Districts.....................................................................................................3-11 3.5 Socioeconomic......................................................................................................3-11 3.5.1 Land Use...............................................................................................................3-11 3.5.2 Disadvantaged Communities and Environmental Justice .....................................3-13 3.5.3 Water Demand ......................................................................................................3-16 3.5.4 Cultural Resources................................................................................................3-22 3.6 Water Quality and Quantity ...................................................................................3-23 3.6.1 Surface Water .......................................................................................................3-23 3.6.2 Groundwater .........................................................................................................3-25 3.6.3 Imported Water .....................................................................................................3-26 3.6.4 Recycled Water.....................................................................................................3-27 November 2006 Mokelumne, Amador, and Calaveras IRWMP Chapter 4 IRWMP Goals and Objectives ..............................................................................4-1 4.1 Goal Development Process ....................................................................................4-1 4.2 State Goals and Priorities .......................................................................................4-1 4.3 Regional Goals and Objectives...............................................................................4-1 4.3.1 Water Supply Goal ..................................................................................................4-2 4.3.2 Flood Protection Goal .............................................................................................4-3 4.3.3 Water Quality Goal..................................................................................................4-3 4.3.4 Environmental Protection and Enhancement Goal .................................................4-3 4.3.5 Regional Communication and Cooperation Goal....................................................4-4 Chapter 5 Projects ..................................................................................................................5-1 5.1 Project Collection ....................................................................................................5-1 5.2 Preliminary Screening .............................................................................................5-1 5.3 Project Development...............................................................................................5-1 5.4 Project Summaries..................................................................................................5-5 5.4.1 Amador Breached Dam Removal Project ...............................................................5-5 5.4.2 Amador Canal and Ione Canal Pipe Conversion Project ........................................5-6 5.4.3 Amador Dry Creek Watershed Assessment Implementation & Management Plan 5-7 5.4.4 Arroyo Ditch Pipe Conversion .................................................................................5-8 5.4.5 Backwash Water Reuse Project..............................................................................5-9 5.4.6 Bear River Reservoir Expansion Project...............................................................5-10 5.4.7 Broad Street Storm Drain Diversion......................................................................5-12 5.4.8 Calaveras River Watershed Implementation Plan ................................................5-13 5.4.9 Camanche – New Hogan Phase II Water Distribution Loop Project .....................5-15 5.4.10 Camanche North Shore Wastewater Improvement, Camanche South Shore Wastewater Improvement, and Pardee Recreation Area Wastewater Improvement Projects.5-16 5.4.11 Central Amador Water Project System / Amador Water System Inter-tie.............5-19 5.4.12 Central Amador Water Project System Fire Storage ............................................5-20 5.4.13 Cosgrove Creek Project ........................................................................................5-21 5.4.14 Enlarge Pardee Reservoir.....................................................................................5-23 5.4.15 Gayla Manor Wastewater Project .........................................................................5-24 5.4.16 Gravity Supply Line Project...................................................................................5-25 5.4.17 Henderson Reservoir Dam Reinforcing Buttress ..................................................5-26 5.4.18 Highway 4 Corridor Regional Water/Wastewater Project .....................................5-27 5.4.19 Highway 12/26 Regional Water/Wastewater Project ............................................5-28 5.4.20 Highway 88 Corridor Wastewater Treatment/Transportation/Disposal .................5-29 5.4.21 Inter-Regional Conjunctive Use Project ................................................................5-30 5.4.22 Ione Amador Plymouth Treated Water Loop.........................................................5-32 5.4.23 Jackson Creek Enhancement Project ...................................................................5-33 5.4.24