Contra Costa County
Owner Reference: 24-RFP-026
Bid Date: 11/25/2024 at 05:00pm
Pre-Bid: 11/04/2024 @ 03:00pm
Trades: *A&E Architecture & Engineering: Professional Services, Consultant, Consulting & Planning Services, Design/Build Contractor; Design/Bid/Build Entity (DBBE)
The Phase 1 project will implement several nature-based coastal flood protection features. The Phase 1 project will incorporate generous setbacks to allow for restoration of historic wetland habitats, include a gently sloped “Living” levee to provide coastal flood protection for critical WCW facilities, and will provide a stormwater retention basin and pump to manage runoff and accommodate rising groundwater levels. In addition, the living levee will provide upland and transition-zone habitat adjacent to the restored tidal marshes and provide safer and more reliable public access to the shoreline. The levee as currently designed to 30% drawings will run along the 0.65-mile boundary of the WCW treatment plant at Wildcat Marsh, and tie-in to existing flood protection features managed by Contra Costa County Flood Control District along San Pablo Creek to the north and Wildcat Creek to the south. The levee’s gentle slopes on the bay-facing side will provide transition-zone and upland habitats between the levee crest trail and tidal marsh habitats. This buffer will provide refuge areas for wildlife (including threatened Salt Marsh Harvest Mouse) and reduce disturbance of marsh from the recreational use of the trail. Phase 1 includes seven (7) acres of tidal marsh restoration in the near-term. Thanks to a reconfiguration of the WCW treatment facility (a modernization for the plant happening concurrently), the Phase 1 project can transition formerly diked ponds into tidal wetland, allowing for near term habitat improvements. The Phase 1 project was included as an authorization (up to $45 million as an Environmental Infrastructure project) for the U.S. Army Corps of Engineers (USACE) support for construction as part of the 2022 Water Resources Development Act. The project team is in conversation with federal partners to help support the authorization becoming a budget appropriation.
Victoria Donati
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Owner: West County Wastewater District (WCWD) CA
Published 10/27/2024 on Construction Bid Source
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