Zone 4
Area: 2,960 acres
Natural Creeks: < 1 mile
Earth Channels: 3 miles
Concrete Channels: 1 mile
Underground Pipes: 9 miles
Improved Creeks: < 1 mile
Hayward (partial)
Featured Projects
Because the proposed benefit assessment increase was not approved by voters in June 2025, the identified improvements for Zone 4 will need to be deferred. The District will continue to prioritize its limited Zone revenue toward urgent and critical repairs as needed.
If funding becomes available in the future through an increased benefit assessment, there are several critical flood control projects that are needed in Zone 4. The projects highlighted below would remove properties from the floodplain, saving property owners money on required flood insurance.
Addressing Future Sea Level Rise: Tidegate Relocation and Winton Ave. Crossing Replacement
Location: Hayward
Anticipated Completion: Pending funding availability
The District recently completed a Coastal and Riverine Flood Assessment to evaluate flood mitigation alternatives for flood control channel outfalls, including at the tidegate in Hayward Regional Shoreline. Pending availability of funding, the District plans to relocate the existing tidegate structure at the west end of the channel upstream, integrate and replace the culvert crossing at Winton Avenue with the new tidegate structure. Tidegates help prevent high water levels from San Francisco Bay from flowing back into the flood control system during storms and high tides. Upgrading this infrastructure and improving the nearby crossing will help stormwater move more efficiently through the system while reducing flood risk for nearby neighborhoods and businesses.
Floodwall Improvements Upstream of Union Pacific Railroad
Location: Hayward, between Dunn Rd. and Clawiter Rd.
Anticipated Completion: Pending funding availability
Pending availability of funding, the District plans to construct new floodwalls along a section of the flood control channel between Dunn Road and Clawiter Road, upstream of Union Pacific Railroad crossing. Floodwalls help keep stormwater contained within the channel during extreme storm events and would meet FEMA design requirements.