California completes major tidal habitat restoration project

• Tidal waters now flow into 3,400 acres of restored habitat.
• The project improves flood protection for local communities.
• It supports fish and wildlife species, including Delta smelt.
• Public access for recreation will be available after completion.

September 22, 2024 —Last week, the California Department of Water Resources (DWR) and Ecosystem Investment Partners (EIP) celebrated the completion of the Lookout Slough Tidal Habitat Restoration and Flood Improvement Project in Solano County. This significant project marks the first time in a century that tidal waters flow into 3,400 acres of restored habitat. The initiative aims to support local fish and wildlife while enhancing flood capacity in the area.

Benefits of the Project.

DWR Director Karla Nemeth highlighted the project’s dual benefits, stating, “Protecting people from flooding doesn’t have to be at odds with the environment—it can actually work with it.” The Lookout Slough project not only restores tidal wetlands but also provides improved flood protection for nearby communities. It plays a crucial role in addressing the challenges of more intense droughts and floods.

California Natural Resources Secretary Wade Crowfoot emphasized the project’s significance, describing it as a major step toward restoring natural habitats in the Delta, a key area for biodiversity.

Construction Details.

The Lookout Slough project is the largest single tidal wetland restoration effort in the Delta to date. Construction began in June 2022 and involved building over three miles of levee, which offers 100-year flood protection while accounting for future sea level rise. Additionally, the project included the excavation of 26 miles of tidal channels and the restoration of native habitats.

The breached levee site now provides over 40,000 acre-feet of additional flood storage, which will help protect surrounding communities during future flood events.

Community and Recreational Access.

During the levee breaching ceremony, attendees witnessed the first of nine planned breaches, allowing tidal waters to flow into the area. Once all breaches are completed, the public will have access to the new tidal channels for activities such as wildlife viewing, fishing, and hunting. A non-motorized boat ramp will be available at the northernmost breach.

Conclusion.

The Lookout Slough project is part of California’s broader efforts to balance water management needs with environmental conservation. It reflects a successful public-private partnership that has brought together various stakeholders to achieve these goals. With ongoing projects like this, DWR aims to create sustainable habitats while ensuring the water needs of millions of Californians are met.

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Image via California DWR: “The California Department of Water Resources (DWR) and Ecosystem Investment Partners (EIP) hold a levee breaching ceremony to celebrate the completion of the Lookout Slough Tidal Habitat Restoration Project in Solano County. The levee will be breached in nine places, creating an open water habitat for fish and wildlife in the Sacramento-San Joaquin Delta. Photo taken September 18, 2024.”