City of Santa Rosa PlanetBids #STMPND2

Concrete Lining and Subgrade Stabilization for Stormwater Ponds at Laguna County Sanitation District

Santa Barbara County Public Works is seeking contractors for the concrete lining of two stormwater ponds at the Laguna County Sanitation District's wastewater reclamation plant. - Government Buyer: - Santa Barbara County Public Works, Laguna County Sanitation District - Project Scope: - Concrete lining of two ponds: Storage Basin (approx. 2.2 acres) and Pond A (approx. 1.4 acres) - Installation of reinforced shotcrete or cast-in-place concrete liners - Subgrade stabilization using crushed rock, dry sandy fill, biaxial geogrid, and Class C filter fabric (per Caltrans standards) - Dewatering services to manage perched groundwater and surface water - Installation of pressure relief valves embedded in gravel and filter fabric to mitigate uplift pressures - Compliance with geotechnical recommendations for liner design, subgrade preparation, and slope/compaction requirements - Implementation of all ancillary stormwater control measures as detailed in project specifications - Products/Materials Requested: - Reinforced shotcrete or cast-in-place concrete liners - Subgrade stabilization materials (crushed rock, dry sandy fill, geogrid, filter fabric) - Pressure relief valves for pond liners - Services Requested: - Subgrade stabilization and preparation - Dewatering (engineer-designed system) - Ancillary stormwater control measures - Notable Requirements: - All work must adhere to detailed geotechnical and engineering specifications - No specific OEMs are named; materials must meet specified standards

Description

This project involves the concrete lining of two ponds located at the Laguna County Sanitation District wastewater reclamation plant, specifically the storage basin and Pond A. The scope includes all ancillary stormwater control measures and other work as detailed in the project drawings and specifications. The ponds will be excavated and lined with reinforced shotcrete or cast-in-place concrete liners, with subgrade stabilization and dewatering measures recommended. The project is managed by Santa Barbara County Public Works and requires bidders to submit paper bid responses by August 11, 2026.

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