Opossum Lake, located in Cumberland, Pennsylvania, is a state-owned reservoir that serves as a valuable water resource for the region. Managed by the Pennsylvania Department of Environmental Protection, this earth dam structure was completed in 1961 and stands at a height of 38 feet with a length of 310 feet. With a maximum storage capacity of 1090 acre-feet and a normal storage level of 690 acre-feet, Opossum Lake covers a surface area of 59 acres and drains a watershed area of 4.83 square miles.

Primarily used for recreation, Opossum Lake provides opportunities for boating, fishing, and picnicking in a scenic natural setting. Despite its high hazard potential, the dam is currently assessed as being in satisfactory condition, with regular inspections conducted to ensure its safety and integrity. The reservoir is a vital resource for the community, offering both recreational enjoyment and important water storage capabilities for various uses. With its picturesque location in Lower Frankford Township and proximity to Opossum Creek, this dam serves as a key asset in the region's water management infrastructure.

As climate change continues to impact water resources and ecosystems, Opossum Lake plays a critical role in maintaining water security and resilience in the face of evolving environmental challenges. Its regulated state jurisdiction and robust inspection protocols underscore the commitment to ensuring the safety and sustainability of this important water infrastructure. For water resource and climate enthusiasts, Opossum Lake stands as a testament to the intersection of human ingenuity, environmental stewardship, and recreational enjoyment in the management of water resources for the benefit of both present and future generations.