DUTCH SLOUGH TIDAL MARSH RESTORATION PROJECT Oakley, CA

TIDAL/SUBTIDAL, RIPARIAN FOREST AND MANAGED MARSH

The Dutch Slough Tidal Marsh Restoration Project will restore natural Delta habitats to a 1,187-acre site in RESTORATION GOALS / TARGET the western Delta city of Oakley. The site, which was Restoration of Delta habitats, primarily tidal marsh and formerly slated for urban development, will soon become tidal channels, as well as riparian woodland, subtidal critically needed habitat for native fish and wildlife species. open water, managed marsh, and uplands. The project The project’s location in the western Delta offers the plans to restore the following: opportunity, soil types, and lack of subsidence to create a large area of tidal marsh and complex intertidal channels 560 acres of tidal marsh favored by native Delta species. Native grasslands, and riparian forests will be restored in the upland portions 26 acres of riparian forest of the site. Tidal habitats are those that were historically prominent in the Delta, and their restoration is considered a critical action to increase the number of native sensitive 48 acres of managed marsh species and improve the general ecological health of the Delta. 100 acres of subtidal open water

The project site consists of three leveed parcels which will LOCATION AND LANDOWNER be restored to a mosaic of tidal marsh, riparian woodland, The Dutch Slough site is located in the City of Oakley, open water, managed marsh, and upland habitats. eastern Contra Costa County, in the western Delta. The site Construction will consist of earthmoving to create the encompasses 1,187 acres, and is bound by Dutch Slough proper elevations for gradually sloping marsh plain, and on the north, Marsh Creek on the west, the Contra Costa other project features such as channel berms, and the Canal on the south, and Jersey Island Road on the east. rehabilitation of existing levees and construction of new The site is comprised of three parcels, partially separated flood control levees. The project is being implemented by by Emerson Slough and Little Dutch Slough. DWR owns all the California Department of Water Resources (DWR) three parcels. Delta Levees Program as part of its legislative mandate to provide ‘net habitat improvement’ in the Delta. In addition to habitat restoration, the project will provide recreation and educational opportunities to benefit residents of the Delta, and adaptive management components to inform future Delta restorations.

CALIFORNIA NATURAL RESOURCES AGENCY | RESOURCES.CA.GOV/ECORESTORE CALIFORNIA ECO RESTORE PROJECTS

2016 / 2017 SUTTER (Target Construction Start Dates) N COUNTY Decker Island 5 99 Dutch Slough Fremont Weir Adult Fish Passage 80 Hill Slough

McCormack Williamson Tract YOLO Tule Red 505 COUNTY Wallace Weir Fish Rescue Facility 50 2018+ SACRAMENTO (Target Construction Start Dates) 16 COUNTY

Bradmoor Island 99 80 FUNDING Goat Island ■■ Cost Estimate $63.35M SOLANO Grizzly Slough Property Acquisition: COUNTY Funded by CALFED Ecosystem Restoration Program Lisbon Weir and State Coastal Conservancy 1 2 3 Lower Putah Creek Realignment Planning and Design: 5 Funded by DWR and State Coastal Conservancy Lower Yolo Ranch

Construction: Estimated at $32.35M: Prospect Island Funded by DWR, State Coastal Conservancy, California Department of Fish and Wildlife (CDFW), Sherman Island: Whale’s Belly US Environmental Protection Agency, and US Fish and Wildlife Service Southport Levee

Ongoing Maintenance and Monitoring: Twitchell Island: Levee Funded by DWR 12 Twitchell Island: West End TIMELINE Property Acquisition – beginning 2003 Yolo Bypass Floodplain Restoration

Planning, Design and Permitting – 2006 Winter Island

Construction on parcels #1 and #2 – 2017-2018 COMPLETED Revegetation of parcels #1 and #2 – 2018-2019 (Construction Completed)

Breach parcels #1 and #2 – 2020 LEGEND Fish Passage Improvements Knights Landing Outfall Gate Floodplain Restora on Construction timeline for parcel #3 is68 undetermined0 Setback Levee Subsidence Reversal Lindsey Slough and Carbon Storage DUTCH SLOUGH PERMITTING Tidal Restora n Sherman Island: Mayberry Farms ■■ All necessary permits obtained Yolo Bypass Boundary Legal Delta and Suisun Marsh LEGEND Boundaries 4 Sherman Island: Whale’s Mouth Finalizing Incidental Take Permit with CDFW Water Bodies Fish Passage Improvements Sherman Island: Mayberry Slough ■■ CEQA compliance – Complete Floodplain Restoration Setback Levee CONTRA COSTA Twitchell Island: East End The Final Supplemental EIR was certified in COUNTY September 2014 Subsidence Reversal and Carbon Storage PROJECT PROPONENT Tidal Restoration DWR Project Manager Patty Finfrock Yolo Bypass Boundary [email protected] SAN JOAQUIN Legal Delta and Suisun MarsADDITIONALh INFORMATION 0 5 10 20 (916) 651-0851 COUNTY Boundaries http://water.ca.gov/floodsafe/fessro/ALAMEDA MILES environmental/dee/dutchslough/index.cfmCOUNTY Water Bodies

CALIFORNIA NATURAL RESOURCES AGENCY | RESOURCES.CA.GOV/ECORESTORE