Delta Islands and Levees Feasibility Study


SCH Number
Lead Agency
U.S. Army Corps of Engineers
Document Title
Delta Islands and Levees Feasibility Study
Document Type
EIS - Draft EIS
Present Land Use
Recreation - land is open water owned by East Bay Regional Parks/Big Break Regional Shoreline

Document Description
The selected plan proposes approx 340 acres of intertidal marsh restoration at Big Break via direct placement of 1,000,000 cy of material from annual O&M dredging over an estimated 10-year period and is both the Selected Plan and the Environmentally Preferred Alternative. Dredged material would come from O&M activities in the SF Bay to Stockton DWSC between approx station points 400+00 and 850+00. Dredged material would be directly pumped to the restoration site, rather than typical land-based dredged material placement sites. Approx 340 acres of open water habitat would be restored to intertidal marsh habitat, with approx 90 acres planted with aquatic vegetation. The remaining 245 acres would be underwater channels and shallow habitat for aquatic fauna species. In addition, the 50 acre remnant levee along the northern edge of Big Break would be treated for invasive plant species and would be planted with native riparian species.

Contact Information
Anne Baker
U.S. Army Corps of Engineers
1325 J St, 10th Floor
Sacramento, CA 95814

Phone : (916) 557-7277


Contra Costa
Total Acres
Parcel #
037-191-004-3, -029-0
State Highways
Big Break, Dutch Slough, San Joaquin River

Notice of Completion

Review Period Start
Review Period End
Development Type
Other (340 acres of tidal marsh habitat)
Local Action
Other Action Other Action: restoration
Project Issues
Aesthetic/Visual Agricultural Land Air Quality Archaeologic-Historic Biological Resources Noise Recreation/Parks Traffic/Circulation Vegetation Water Quality Wetland/Riparian Land Use Cumulative Effects
Reviewing Agencies
California Department of Parks and Recreation California Highway Patrol Caltrans, District 3 Central Valley Flood Protection Board Delta Protection Commission Delta Stewardship Council Department of Fish and Wildlife, Region 2 Department of Water Resources Native American Heritage Commission Resources Agency State Water Resources Control Board, Division of Water Quality Regional Water Quality Control Bd., Region 5 (Sacramento)
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