About the Delta Plan

The following thirteen maps are listed in the Delta Plan document using a standard print resolution. These high resolution versions are being made available so that the detailed information on the maps is more easily readable.

• Figure 1-1 Delta Boundaries

  The Sacramento-San Joaquin Delta and Suisun Marsh are referred to throughout the Plan collectively as “the Delta,” unless otherwise specified. The Sacramento-San Joaquin Delta is defined in Water Code section 12220, and Suisun Marsh means the area defined in Public Resources Code section 29101 and protected by Division 19 (commencing with section 29000).

• Figure 1-2 Delta Plan Study Area - Revised

  The Delta Watershed and Areas Receiving Delta Water - Water from the vast Delta watershed, spanning over 45,000 square miles (30 million acres), fuels both local economies and those in export areas hundreds of miles away.

• Figure 1-4 The Delta Plan

  The map shows the primary area covered by the Delta Plan, including features and uses referred to in the Plan's 14 policies and 73 recommendations.

• Figure 3-2 Moving and Storing California’s Water

  To provide more reliable water supplies despite the state’s hydrologic variability and diverse geography, and also to manage floods during wet years, State, federal, and local agencies have built a vast, interconnected infrastructure system throughout California.

• Figure 4-4 Priority Locations to Evaluate Physical Expansion of Floodplains

  There are limited locations in the Delta where land use, land elevation, and primary fish migration corridors are conducive to physically expand floodplains. To ensure that these opportunities are not foreclosed, new flood control works and capital improvement projects to existing flood control works in these priority locations must evaluate the feasibility of setting back or removing existing levees in order to physically expand the width of the channel.

• Figure 4-5 Elevation Bands for the Protection, Restoration, and Enhancement of Different Classes of Natural Communities

  Opportunities for habitat restoration in the Delta are constrained first and foremost by the elevation of land, which determines the potential of an area to be restored. Much of the Delta has subsided too deeply to restore its original ecological functions.

• Figure 4-7 Priority Habitat Restoration Areas

  Priority habitat restoration areas are large areas within which specific sites may be identified for habitat restoration based on assessments of land use and other issues addressed through further feasibility analysis. Protecting the opportunity to restore habitat in these areas will contribute sufficient land area, at appropriate elevations and in appropriate locations, to restore critical habitat types and to achieve the vision of a restored Delta ecosystem.

• Figure 4-8 Priority Migration Corridors

  This map identifies Priority Migration Corridors for native migratory fish species within the Delta. Public agencies should fund and implement projects that improve aquatic habitat conditions and reduce predation risk for juvenile salmon along the priority migration corridors.

• Figure 5-1 Delta Primary & Secondary Zones & Suisun Marsh

  The Delta is composed of three areas recognized in California law. The Primary Zone is the largest and includes 490,050 acres at the heart of the Delta (Public Resources Code section 29728). The Secondary Zone includes 247,320 acres surrounding the Primary Zone (Public Resources Code section 29731). Suisun Marsh lies northwest of the Primary Zone, encompassing 106,570 acres (Public Resources Code section 29101) primarily of managed wetland. The Suisun Marsh overlaps the boundary of the Delta by about 4,300 acres.

• Figure 5-2 Delta Communities

  The map shows land uses designated by city and county general plans. Within cities' spheres of influences (SOIs), the map shows land use designations proposed in city general plans, where available. In cases where cities have not proposed land uses within their SOIs, the map shows land uses designated by county general plans.

• Figure 5-3 Agricultural Land Use in the Delta

  Agriculture is among the qualities that define the Delta as a place. The Delta’s initial reclamation created farmland, and ongoing maintenance of its levees and water controls allows for continued farming in the region. Agriculture dominates the Delta landscape and provides the setting for Delta residents’ communities, homes, and job sites.

• Figure 5-5 State Parks and Other Protected Lands

  The map shows the locations of State parks and other protected lands in the Delta. The Delta Protection Commission estimates that about 12 million activity days of recreation occur in the Delta annually (DPC 2012b). Visitors value the wide expanses of open land, interlaced waterways, historic towns, and the lifestyle offered by the Delta.

• Figure 5-6 Major Delta Resources and Recreation

  This map shows the variety and distribution of some of the recreational opportunities in the Delta. The region’s mix of land and water offers di-verse recreation experiences and facilities, including fishing, boating, bird watching, other nature activities, hunting, enjoying restaurants, campgrounds, picnic areas, and historic towns and buildings.

• Figure 7-3 State and Federal Project Levees and Non-project Levees in the Legal Delta and Suisun Marsh

  This map shows the locations of project and non-project levees in the Delta. The project levees begin on the left bank of the Sacramento River at Sherman Island and line most of the riverbanks, as well as the Sacramento River Deep Water Ship Channel and some connecting waterways north to Sacramento and beyond. On the San Joaquin River they line the riverbanks from Old River to Stockton.

• Figure 7-6 Delta Flood Management Facilities

  The map shows flood management resources including flood control bypasses and floodways, along with other floodplains to be protected. It also shows water supply reliability levee projects, flood control project levees and urban non-project levees.