![]() ![]() Utilizing both multi-beam and single-beam survey equipment to ensure precise placement, the removal area was then capped with an equal quantity of lab analyzed clean Columbia River sand. All water accumulated during the dredging phase was pumped into containment tanks (lash Barges) to allow suspended sediments to settle before pumping water through a carbon filter system to an onsite tank where it was tested before pumping into the facilities containment pond. The contaminated sediment was then dewatered and transported by barge to a facility in The Dalles, Oregon where it was trans-loaded into trucks and taken to an upland disposal site identified by the Department of Ecology. area in the vicinity of an existing outfall. HME Construction, Inc then began dredging and removing 5,000 CY of sediment over a 35,000 sq. The debris removed was placed onto a watertight containment barge for disposal. Work performed began with identification and removal of debris from within the project prism. The Millennium Bulk Terminals interim action project purpose was to implement the remediation of a localized area of contaminated sediments identified adjacent to the former Reynolds Metals Reduction Plant. Regulatory Oversight: Department of Ecology Pile Driving Projects – Project: United Harvest Modernization Marine Structures Project: West Coast Clamshell Maintenance Dredging 2015 Project: Berths 205, 206 and 401 Maintenance Dredging 2015 Project: Alcoa Vancouver Sediment Remediationĭredging Experience Projects – Project: Depot Slough Clamshell Maintenance Dredging 2016 Project: Zidell Bank and Sediment Remediation ![]() Project: River Mile 13.5 Remedial Action Implementation Environmental Dredging Projects – Project: Millennium Bulk Terminals Interim Action ![]()
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