Muddy Run Main Dam, located in Lancaster, Pennsylvania, is a pivotal structure along the Susquehanna River, designed by the Philadelphia Electric Company and completed in 1967. This rockfill dam stands at an impressive height of 260 feet with a length of 4800 feet, serving primarily for hydroelectric purposes. With a storage capacity of 60,500 acre-feet and a maximum discharge of 20,000 cubic feet per second, the dam plays a crucial role in managing water resources and generating clean energy for the region.

Despite its high hazard potential, the dam's condition assessment is not available, highlighting the need for regular inspections and risk management measures. The Federal Energy Regulatory Commission oversees the regulatory aspects of the dam, ensuring its safety and compliance with standards. With a moderate risk classification, the dam's Emergency Action Plan is being regularly updated to meet guidelines and prepare for any potential emergencies that may arise. Overall, Muddy Run Main Dam stands as a vital infrastructure contributing to water resource management and climate-friendly energy production in the region.