Dredging has begun at Great Lake's largest commercial harbor

Published July 7, 2016


Duluth, MN – The U.S. Army Corps of Engineers, Detroit District has announced that its contractors have begun dredging portions of the Duluth-Superior Harbor, the largest harbor on the Great Lakes with nearly 40 million tons of material, mainly iron ore and coal, shipped or received each year.

    Dredging began in early July and is expected to be completed mid-November of this year.

    The Corps awarded two contracts to dredge nearly 350,000 CY in the harbor. Marine Tech of Duluth, Minnesota was awarded about $1.4 million and Roen Salvage of Sturgeon Bay, Wisconsin was awarded about $1.25 million to dredge material from the federal navigation channel in order to maintain the channel for optimal commercial navigation.

    Marine Tech will place the dredge material underwater adjacent to Interstate Island within the 21st Avenue West restoration site, while Roen Salvage will place dredge material within the embayment at the 21st Avenue West restoration site. Material is being placed in accordance with the habitat restoration design developed under the St. Louis River Area of Concern Remedial Action Plan. Placement of dredged material is the least costly, engineeringly feasible, and environmentally acceptable placement site for the harbor's dredge material.

    In addition, placement of the dredge material will create optimal water depths and flows to promote the growth of diverse aquatic vegetation and reestablishment of a healthy benthic community.

    The project is funded through the district’s operations and maintenance program and the Environmental Protection Agency’s Great Lakes Restoration Initiative program.



Erica Mitchell

Release no. 071607-01