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Kinnickinnic River sediment removal

Kinnickinnic River sediment removal
U.S. Army Corps of Engineers, Detroit District and Wisconsin Department of Natural Resources

To protect human health and the environment in and around the Kinnickinnic River in Milwaukee, Wisconsin, the U.S. Army Corps of Engineers, the Wisconsin Department of Natural Resources, the U.S. Environmental Protection Agency, and the Port of Milwaukee collaborated to remove contaminated sediment from a portion of the river. Because the project required extensive planning and studies to determine the feasibility of the project and was under a tight schedule, the group hired Barr. We completed a feasibility study that included seawall investigation, environmental and geological data review, sediment characterization, and restoration alternative development.

Barr documented all of the preliminary planning and study data in a concept design documentation report, which was completed quickly to assist with a Great Lakes Legacy Act funding application. Next, we collected additional information to design and plan the sediment remediation, completed a dredging feasibility study to evaluate the stability of unprotected and protected portions of the shoreline, and used the data to further refine the channel design and shoreline stabilization.

Approximately 167,000 cubic yards of contaminated sediment containing 1,200 pounds of polychlorinated biphenyl and 13,000 pounds of polycyclic aromatic hydrocarbons were removed from the river and transported by barge to a special cell at the Milwaukee Area Confined Disposal Facility at Jones Island. In addition to the environmental benefits, the Kinnickinnic River sediment removal resulted in a deeper and more navigable river—bringing more boaters, visitors, and businesses to the area.