Cyanobacteria Harmful Algae Bloom (CHAB) Maintenance Dredging

Stockton Port District is requesting sealed bids for maintenance dredging of the surface layer of sediment along the Stockton Waterfront, with bids due September 30, 2026 at 3:00 p.m., and a questions deadline of September 15, 2026. The work is federally funded through a U.S. Army Corps of Engineers grant (Contract No. W912HZ25C0003) and is subject to Davis-Bacon prevailing wage rates and federal contract compliance requirements. A California "A" Contractor License is required.

The base bid scope covers mobilization and demobilization, hydrographic surveying, maintenance dredging of Dredge Area A (11,800 cubic yards) with placement at Roberts Island Dredge Material Placement Site, and Roberts Island site preparation and cleanup. Three optional additive items are available for Dredge Areas B, C, and D totaling 19,090 cubic yards combined. All dredged sediment must be handled, transported, and placed per permits.

Contractors and subcontractors must obtain Transportation Worker Identification Credentials (TWIC) from the Transportation Security Administration at their own expense and comply with California Labor Code prevailing wage and apprenticeship requirements. Work completion is required by November 30, 2026.

Bidders must submit a 10 percent bid bond or security deposit, Bidder Registration Form, Subcontractors List, Non-Collusion Affidavit, and Bidder Certifications. The successful bidder must provide Construction Performance and Payment Bonds equal to the contract price and insurance certificates including Marine or Commercial General Liability of $5 million per occurrence, Automobile Liability of $5 million, and Workers' Compensation with statutory limits.

Site visits may be coordinated upon request during the pre-bid period. The Port reserves the right to award the contract within 90 days of bid opening to the lowest responsible responsive bidder. Responses to questions will be issued by formal written Addenda no later than September 21, 2026.