Environmental Quality Management Inc. (EQM, Cincinnati, Ohio) has been awarded a $45 million cost-plus-fixed-fee contract by the U.S. Army Corps of Engineers, New England District for environmental remediation services at the Callahan Mine site in Maine. The first Task Order will be issued in June for over $6 million.
The former Callahan Mine site was an open-pit mine developed in Goose Pond, a shallow tidal estuary of approximately 75 acres in the town of Brooksville, Maine. From 1968 through 1972, approximately five million tons of waste rock and 800,000 tons of ore-bearing rock were mined from the open pit. The waste rock was disposed of on site in three large piles and was also utilized to create a dam for the tailings impoundment. In summary, the major work elements are remediation of the tailings impoundment; remediation of waste rock pile #3; slope stabilization of the tailings impoundment; consolidation and capping of the tailings impoundment; sediment excavation and disposal in a confined aquatic disposal cell; remediation of residual contamination at waste rock pile #2 and the ore processing area; and site restoration, mitigation, and monitoring.