Tionesta Dam, also known as Tionesta Lake, is a federal-owned structure located in Tionesta, Pennsylvania, along Tionesta Creek. Built in 1940 by the US Army Corps of Engineers, the primary purpose of this Earth dam is flood risk reduction, with additional benefits for fish and wildlife pond creation and recreational activities. The dam has a hydraulic height of 142 feet and a structural height of 154 feet, holding a maximum storage capacity of 180,000 acre-feet with a normal storage of 7,800 acre-feet across a surface area of 480 acres.

This high-hazard dam is equipped with uncontrolled spillways and various outlet gates for water release management. The US Army Corps of Engineers continuously monitors and manages the dam's condition to mitigate flood risks, collaborating with local emergency managers and the public to ensure preparedness for potential emergencies. Regular maintenance and repair work are conducted to uphold the integrity of the dam and its operational efficiency, reflecting the commitment to safeguarding the surrounding communities and environment from potential flooding events.

As part of the risk management measures, the US Army Corps of Engineers actively engages in updating the emergency action plan, conducting risk assessments, and working with local authorities to enhance awareness and readiness in case of a dam-related emergency. By prioritizing activities that minimize risks and coordinating with stakeholders, the agency strives to maintain the dam's safety and functionality while addressing the diverse challenges posed by severe weather events and fluctuating water levels.