Restoration projects currently under way:
- Decker Island Tidal Habitat Restoration Project
- Prospect Island Tidal Habitat Restoration Project
- Winter Island Tidal Habitat Restoration Project
- Yolo Flyway Farms Tidal Habitat Restoration Project
Decker Island is located in the Sacramento-San Joaquin River Delta along the Sacramento River. We are undertaking the restoration of the Decker Island Tidal Habitat Restoration Project in conjunction with California Department of Fish and Wildlife (CDFW) to enhance roughly 140 acres of established emergent wetland with muted tidal connectivity to Horseshoe Bend, and uplands to fully tidal habitat.
Planning is ongoing and the mitigated Negative Declaration has been finalized. Most permits have been obtained and design is approximately 60 percent completed.
The project consists of 3 main elements:
- Lowering a 300 foot section of levee at the northern end of the Island to internal elevation would create a flow through system that would increase access for fish and inhibit the establishment of invasive vegetation
- Reconfiguring the internal berms would assist in moving water on and off site and would provide upland habitat for wildlife within the existing tidal wetland
- Widening the existing breach at the southern end of the Island that would provide full tidal access to the site
Prospect Island is in the Cache Slough Complex (CSC) immediately east of the southern end of the Yolo Bypass, in the Sacramento-San Joaquin River Delta. We are undertaking the restoration of the Prospect Island Tidal Habitat Restoration Project in conjunction with CDFW to convert roughly 1,609 acres of flooded uncultivated land to fully tidal habitat.
Planning is ongoing. Public draft of the EIR has been completed and circulated for public review. The design is approximately 65percent completed and USACE 404 permit application and USFWS and NMFS Biological Assessments have been completed and submitted.
- Interior grading
- Vegetation management
- Possible clean fill import for subsidence reversal
- Possible weir installation
- Breaching of exterior levees
- Addressing various property considerations
- Monitoring as part of a science- based adaptive management plan
The project’s restoration activities will restore tidal action with an estimated 1,360 habitat acreage credits.
After 2 years, which would allow time for the re-vegetation of disturbed soils, the site will be breached to allow full tidal action. Construction of the initial restoration activities is estimated to begin in June 2018.
Publications & Reports:
- Fact Sheet
- Communications and Engagement Plan
- Notice of Preparation (May 2013)
- Implementing Habitat Restoration Requirements of the Biological Opinions
- Scoping Facilitators Presentation
- CEQA Scoping Report with Appendices
- CEQA Scoping Report without Appendices
- Site Characterization and Groundwater Monitoring Data Collection Summary
- Turbidity Modeling Report
- Restoration DRERIP Evaluation
- Draft Environmental Impact Report Fact Sheet
- Phase I Modeling Results Synthesis Final Report (September 2012)
- Phase I Modeling Results Synthesis Report Appendices A-K
- Phase II Modeling Synthesis Final Report (July 2014)
- Phase II Modeling Synthesis Final Report Appendices A-D
We are undertaking the restoration of the Winter Island Tidal Habitat Restoration Project in conjunction with CDFW to restore roughly 586 acres of muted brackish wetlands with muted tidal connectivity to fully tidal habitat.
Directly north of the City of Pittsburg, Winter Island is separated by the New York Slough and boarded the by the Broad Slough, Suisun Bay, and the Middle Slough. A confluence of the Sacramento and San Joaquin Rivers is located north of Winter Island
Planning is ongoing. The Project consists of 3 main elements:
- 100 foot breach at the southern water control structure
- Excavation to widen an existing eastern channel
- Removal of the northern water control structure with no breach widening
The project is on schedule to complete the CEQA document by August 2018 and obtain permits by February 2019. The project’s restoration activities will restore tidal action with an estimated 480 habitat acreage credits.Construction of the initial restoration activities is estimated to begin in August 2019.