Every day, tunnels underlying the 20 square mile Pine Knot Tunnel study area drain 35 million gallons of Abandoned Mine Drainage polluted water into Schuylkill River headwaters. This project entailed locating recharge sites of the Pine Knot mine pool. Utilizing funds from the Schuylkill Watershed Initiative Grant, the Pine Knot Tunnel project provided a conceptual design and feasibility study for remediation and mitigation of water pollution attributed to AMD at a collection of sites. Potential project areas were identified, and treatment and diversion project designs were implemented. As part of the study, the USGS is monitoring flow and hydrology to provide critical insight about how the Pine Knot Tunnel system drains.