Pa-486, also known as Harmon Creek, is a local government-owned earth dam located in Washington County, Pennsylvania. It was designed by the USDA NRCS and completed in 1979 with a primary purpose of flood risk reduction along the Paris Run river. With a height of 86 feet and a length of 440 feet, Pa-486 has a storage capacity of 750 acre-feet, serving as a crucial structure in managing water resources in the region.

Managed by the Pennsylvania Department of Environmental Protection, Pa-486 is regulated, permitted, inspected, and enforced to ensure its structural integrity and safety. The dam is classified as having a high hazard potential, but its condition assessment is currently rated as satisfactory. This dam plays a vital role in protecting the surrounding area from flooding events and demonstrates the collaborative efforts between federal and state agencies in safeguarding water resources and communities from the impacts of climate change.

With its significant storage capacity, Pa-486 serves as a key infrastructure for managing water resources and mitigating flood risks in the region. The dam's satisfactory condition assessment, regular inspections, and regulatory oversight by state agencies highlight the importance of proactive measures in addressing climate-related challenges. As a local government-owned structure, Pa-486 exemplifies the critical role that dams play in protecting communities and enhancing resilience to the impacts of extreme weather events in Pennsylvania.