GAI performed a condition assessment of a confidential Acid Mine Drainage (AMD) treatment facility’s steel clarifier structure and a lime silo building as part of a facility restoration project. This confidential AMD treatment facility was constructed in the 1970s at the site of the former mine.

GAI has been supporting the mine pool dewatering wastewater treatment plant since 2016. This support included upgrade of the facility, which involved Pennsylvania Department of Environmental Protection (PADEP) permitting and development of the design engineer’s report for new pumps, chemical addition, and filtration. The upgrade also involved a new conveyance system for leachate from a coal-combustion residuals landfill facility. GAI prepared an ALTA survey for the facility, as well as a covenant for an infiltration berm installed for compliance with PA Chapter 102 best management practice.

GAI’s structural engineers performed a clarifier and lime silo condition assessment, which included a review of deficiencies and an engineer’s estimate of probable costs to make the recommended improvements. GAI continues to support ongoing compliance reporting for the facility’s NPDES permit.