Oregon/Washington Clamshell Maintenance Dredging 2026

The U.S. Army Corps of Engineers Portland District is seeking bids under Solicitation W9127N26BA015 for the Oregon/Washington Clamshell Maintenance Dredging 2026 project, a Firm Fixed-Price construction contract set aside exclusively for small businesses under NAICS code 237990. The work involves maintenance dredging at fourteen authorized sites across Oregon and Washington, totaling approximately 486,100 cubic yards of material using clamshell dredges mounted on barges to excavate sediment and transfer it to scows towed by attendant tugs for placement at designated in-water disposal areas including ocean and river locations. The contract has a defined performance period from June 16, 2026, through March 27, 2027, with an anticipated award date of July 15, 2026, and a Notice to Proceed issued on July 22, 2026. The contractor has flexibility in determining the sequence of work across sites but must comply with strict environmental windows, such as operations limited to May through October in Port Orford and July through October in Chetco Boat Basin, with additional seasonal constraints on other sites extending into early 2027. Mandatory dredging quantities are specified for key locations including 120,000 cubic yards at Skipanon River, 100,000 at Chinook, and 90,000 at Baker Bay, with optional work including 15,000 cubic yards at USCG Cape Disappointment and 3,100 cubic yards at Willow Grove Boat Basin. Required third-party hydrographic and land surveys are mandatory for Port Orford and optional for several other sites, and contractors must account for survey methodologies, vertical side slopes, and the presence of floating docks. Mobilization and demobilization are mandatory, with optional incremental costs for additional movements, and all work must occur without re-mobilization between the Oregon Coast and Columbia River regions. The solicitation closed on July 6, 2026, and is structured as an Invitation for Bids, with no disclosed contract value or unit pricing, and all terms are to be derived from the attached plans and specifications referenced in the contract.