Saw Mill is a local government-owned dam located in Norristown Borough, Montgomery County, Pennsylvania. Built in 1968, this earth dam stands at 47 feet high and spans 1335 feet along Sawmill Run, serving primarily for flood risk reduction. With a storage capacity of 740 acre-feet and a drainage area of 3.92 square miles, this structure is regulated, permitted, inspected, and enforced by the Pennsylvania Department of Environmental Protection.

Despite its fair condition assessment and high hazard potential, Saw Mill has not had any modifications over the years. The last inspection took place in July 2020, with a scheduled annual inspection frequency. The dam's emergency action plan status, risk assessment, and management measures remain unspecified. The dam poses a significant risk due to its location and potential impact on downstream areas, making it crucial for ongoing monitoring and maintenance to ensure public safety and flood protection in the region.