Cross Creek (Pa-661) is a key water resource infrastructure in Washington, Pennsylvania, designed by the USDA NRCS and regulated by the Pennsylvania Department of Environmental Protection. Completed in 1979, this earthen dam stands at a height of 82 feet and serves primarily for flood risk reduction, with additional purposes including recreation and water supply. With a storage capacity of 11,200 acre-feet and a surface area of 260 acres, the dam plays a crucial role in managing the water resources of the Cross Creek watershed.

Located in Cross Creek Township, this dam is under the jurisdiction of the Huntingdon District of the US Army Corps of Engineers. The last inspection in November 2020 deemed its condition satisfactory, although its hazard potential is considered high. With a history of modifications, including a hydraulic upgrade in 2015, the dam continues to be a vital structure for mitigating flood risks in the region. Water resource and climate enthusiasts will appreciate the complex management and regulatory framework surrounding Cross Creek (Pa-661), highlighting the importance of effective dam infrastructure in safeguarding communities and ecosystems from water-related hazards.