Description: Before the creation of Lake Arthur, an extensive abandoned mine land reclamation effort was completed within Moraine State Park under Operation Scarlift to ensure that water quality in the lake would be good. Work included reclaiming coal refuse, spoil piles, and highwalls, installing mine seals and planting trees and ground cover. While the reclamation effort had spectacular results, some AMD discharges did remain. The Barkley Road passive treatment system was originally constructed by the Butler County Conservation District around 1996 on Moraine State Park property to treat at least one, possibly more AMD discharges flowing directly into Lake Arthur. The treatment system was designed by the NRCS and constructed with funds from an environmental fine. In 2022, Stream Restoration Incorporated and the Slippery Rock Watershed Coalition rehabbed the treatment system. A new sludge pond was constructed and then sludge and debris was removed. New spillways were installed in between the ponds and rock level spreaders were installed in the wetland (pond 2).