Pa-485 is a vital flood risk reduction structure located in Hanover Township, Washington County, Pennsylvania, along the TR Harmon Creek. Built in 1977 by the USDA NRCS, this earth dam stands at 78 feet tall and spans 630 feet in length, with a storage capacity of 952 acre-feet. Managed by the Pennsylvania Department of Environmental Protection, Pa-485 is regulated, inspected, and enforced by state authorities to ensure its safety and functionality.

With a high hazard potential but a satisfactory condition assessment, Pa-485 plays a crucial role in protecting the surrounding area from potential flooding events. The dam's primary purpose is flood risk reduction, reflecting its importance in safeguarding nearby communities and infrastructure. Despite its age, Pa-485 remains a reliable structure, with regular inspections and maintenance to uphold its effectiveness in mitigating flood risks.

As a key component of flood management in the region, Pa-485 serves as a testament to the collaborative efforts between local governments, state agencies, and federal designers in safeguarding water resources and enhancing climate resilience. Its strategic location, design, and operational protocols showcase a commitment to proactive risk reduction and emergency preparedness, making it a focal point for water resource and climate enthusiasts seeking to understand sustainable infrastructure solutions.