Northwest Levee Improvements and Stone Road Seepage Reduction Project

SCH Number: 2018072062
Lead Agency: Bethel Island Municipal Improvement District
Document Title: Northwest Levee Improvements and Stone Road Seepage Reduction Project
Document Type: MND - Mitigated Negative Declaration
Received: 7/25/2018

Document Description: The project would involve construction of improvements along the Taylor Slough levee between stations 0+00 and 130+00 (site 1), and seepage reduction improvements along the Sand Mound Slough levee between levee stations 340+00 and 450+00 (site 2). Site 1 levees would be improved to meet Bulletin 192-82 criteria, including raising and widening the levee crest, waterside slope armoring, landside slope flattening, installation of a levee crown all-weather road, and geotechnical remediation. Site 1 would also include habitat creation along 8,000 lf of the land and waterside of the levee. Site 2 may include drainage blanket and ditch construction, monitoring well installation, and subsurface drainage enhancements to address ongoing seepage issues along Windsweep and Stone Roads. The project would take approx 2 years to construct.

Contact Information: Regina Espinoza
Bethel Island Municipal Improvement District
3085 Stone Rd PO Box 244
Bethel Island, CA 94511
925-684-2210

Coordinates: 38°01'41"N 121°38'26"W
Counties: Contra Costa
Cross Streets: Canal Rd, Stone Rd, Bethel Island Rd, Windsweep Rd and Gateway Rd
Zip: 94511
Total Acres: 40
Parcel #: 029-040-011
Waterways: Dutch, Sand Mound, Taylor and Piper Sloughs
Township: 2N
Range: 3E
Section: 10
Base: MD
Other Location Info: Bethel Island

Review Period Start: 7/26/2018
Review Period End: 8/24/2018
Development Type: Other (levee and drainage improvements)
Local Action: Other Action Other Action: flood control
Project Issues: Cumulative Effects Landuse Wetland/Riparian Water Supply Water Quality Vegetation Tribal Cultural Resources Traffic/Circulation Toxic/Hazardous Soil Erosion/Compaction/Grading Recreation/Parks Public Services Population/Housing Balance Noise Minerals Geologic/Seismic Flood Plain/Flooding Drainage/Absorption Biological Resources Archaeologic-Historic Air Quality Agricultural Land Aesthetic/Visual
Reviewing Agencies: Department of Conservation State Lands Commission Regional Water Quality Control Bd., Region 5 (Sacramento) California Department of Parks and Recreation Caltrans, District 4 Central Valley Flood Protection Board Delta Protection Commission Delta Stewardship Council Department of Fish and Wildlife, Marine Region Department of Fish and Wildlife, Region 3 Department of Water Resources Native American Heritage Commission Office of Emergency Services, California Office of Historic Preservation Resources Agency