California Department of Fish and Wildlife

Hill Slough Restoration Project Phase I - Preliminary Restoration Design, Environmental Documentation and Permitting

hill slough

Hill Slough
Photo by Gena Lasko, CDFW

Location: Hill Slough, Suisun Marsh, Suisun City California

Total Project Cost: $642,646 State (Ecosystem Restoration Program)

Partners: California Wildlife Foundation, Solano County Public Works, CDFW

Project Summary: The purpose of the overall project is to restore brackish tidal marsh and associated upland ecotone at the northern Suisun Marsh near the corner of Highway 12 and Grizzly Island Road to benefit endangered as well as migratory and resident species. The funding under this grant will support Phase 1 of this three-phase project.

The Hill Slough Restoration Project has been divided into the following three phases:

  • Phase I: Preliminary Restoration Design, Environmental Documentation and Permitting. This phase includes preparation of the preliminary restoration design and plan, as well as an interpretive program, environmental documents, and permits
  • Phase II: Final design, implementation, and pre-project/baseline monitoring
  • Phase III: Post-project monitoring

Tidal marshes, which were once the most common habitat type in the Bay-Delta system, are now restricted to remnant, disjunct patches. Numerous documents and many agencies have recommended tidal restoration in the Suisun Marsh. To help achieve these recommended goals, the Hill Slough Restoration Project is planning to create 940 acres of tidal wetlands in the Suisun Marsh.

This project will meet Ecosystem Restoration Program (ERP) goals and objectives by reducing the risk of entrainment of at-risk, native anadromous species of concern including spring-run and winter-run Chinook salmon, steelhead trout, and green sturgeon, as well as other resident and transitory fish species in the Suisun Bay. The project will also meet goals calling for restoration of tidal brackish marsh that will aid in the recovery of listed plant and wildlife species while contributing to primary productivity in the estuary.

Phase I of the Project is scheduled to end in June of 2013.