Willapa Harbor Maintenance Dredging
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W912DW26Z1ATA
]fy26 willapa harbor maintenance dredging
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Description
The USACE Seattle District requires construction dredging for the FY26 Willapa Harbor Maintenance Dredging project in Willapa Harbor, WA, at three federal navigation features in Willapa Bay, Washington: the entrance to Tokeland Marina, the entrance channel to Nahcotta, and the Bay Center entrance channel and basin. The project will require dredging via mechanical (clamshell) means to remove approximately 180,000 CY of accumulated sediment across the three project features. The minimum required dredging depth varies from -10 ft (Bay Center and Nahcotta) to -15 ft MLLW (Tokeland). Dredged material will be disposed of via bottom-dump barge at the Cape Shoalwater and/or South Channel open-water disposal locations within Willapa Bay. The in-water work windows are as follows: Tokeland Marina (16 July 2026 through 15 February 2027), Nahcotta (16 July 2026 through 01 February 2027), and Bay Center and Palix River (16 July 2026 through 30 September 2026). Access to/from Willapa Bay requires transit of the Willapa Bar, an unmaintained and unprotected entrance from the Pacific Ocean with dynamic shoals, strong tidal currents, and challenging weather conditions. Contractors should expect difficult mobilization, demobilization, and construction conditions.
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