Great Lakes E&I personnel have performed numerous projects requiring removal of contaminated sediments from along and within waterways. Hydraulic and mechanical dredging equipment, including excavators working from barges and along shorelines, have been utilized to perform these removals in a safe and compliant manner. Great Lakes E&I collaborates with clients and consulting engineers to develop and implement the most efficient and cost-effective sediment removal strategies. Work elements common to these projects include protection of dredge areas using turbidity curtains and other protection measures; dredging and dewatering of sediments; dredgeate dewatering and process water disposal; upland staging, dewatering, and conditioning of sediments; and on-site repository placement or off-site disposal. Great Lakes E&I has worked closely with clients and regulators to implement this ecologically sensitive work within critical biological and seasonal windows sometimes working around the clock to meet stipulated project completion milestones.
CONTAMINATED SEDIMENT REMOVAL
HURON RIVER – MGP SITE CLEAN UP
ANN ARBOR, MI
Great Lakes E&I performed the excavation of impacted soil at a former MGP site along the Huron River in downtown Ann Arbor, Michigan. Primary tasks involved clearing and grubbing of the site, dewatering, installing a trapping cap, and disposing of all impacted material from the site. Parties involved with this project included a major utility company, a local engineering firm, the City of Ann Arbor, and the Michigan DEQ. Given the close proximity of the site to the downtown area, crews had to manage odor control on a daily basis utilizing a Piian misting system. Prior to loaded trucks leaving the site with contaminated material, loads were sprayed with a foaming odor suppressant.
PCB CONTAMINATED SEDIMENT REMOVAL from the SHEBOYGAN RIVER
This project involved the removal of PCB-contaminated sediments from the Sheboygan River in Sheboygan, Wisconsin. Specific tasks included dredging, dewatering, stabilization, transport and disposal of PCB and PAH impacted sediments, post-dredge confirmation sampling and bathymetric surveys, placement of sand cover, and site restoration.