Willow run creek site - Michigan
At a glance
The Willow Run Creek Site involved the remediation of over 340,000 cubic yards of polychlorinated biphenyl impacted sediments and soil. GHD developed a program of pre-design studies, including pilot-scale dredging/dewatering studies, to determine the optimal method of sediment removal and processing.
The challenge
The selected remedy involved dewatering of the work area, water treatment, and solidification of the sediments to provide the necessary strength for placement in a site-dedicated consolidation disposal facility (CDF). The CDF was designed to meet stringent Toxic Substances Control Act (TSCA) and Resource Conservation and Recovery Act (RCRA) hazardous waste disposal facility standards.
Our response
The impact
Restoration activities included 12 acres of wetland mitigation. Soil excavated during the creation of the fish spawning habitat on the Huron River was beneficially reused on another remediation project located nearby, reducing the cost and the carbon footprint of both projects.