DOP Submersible dredge pumps

Westport Marina dredged for the first time
in nearly 40 years


Location: Westport Marina, Washington State, USA
Period: Q3/2019 – Q1/2020
Product type: DOP250 with cutter head
Contractor: Bergerson Construction

Westport Marina dredged for the first time in nearly 40 years

Westport Marina is the home of Washington State’s largest charter fishing fleet. Moreover, the port is packed with recreational users, being the largest coastal marina in the Pacific Northwest. The harbour badly needed maintenance dredging as the last dredging work was undertaken some 39 years ago.

As the marina had not been dredged for nearly 4 decades the sediment contained plenty of debris

The job, which started in September, is carried out using a large excavator John Deere 470 equipped with a long-reach boom and stick, based on a pontoon. This pontoon can be repositioned in the marina easily as per the progress of the dredging job. At the back of the excavator a Power Pack is mounted.

The DOP250 and cutter unit are powered by the power pack mounted at the back of the excavator

The actual dredging job is done using a DOP250 with cutter unit. The DOP250 and its cutter unit are powered by the hydraulic power pack. The DOP250 works at a dredging depth of -8m. It pumps the harbour sludge through a 250 mm floating pipe line over some 1100 m to a settling field.

The settling field for the DOP pump dredge production id some 1100 m form the dredge location

As the marina is packed with jetties, the job has to be carried out in a controlled manner. The DOP250 is positioned between 2 berths maneuvering the excavator’s boom. This way the sediment built up over the last decades can be removed entirely.

The marina is packed with jetties - the excavator easily moves the DOP250 within the berths to remove all sediment