Mill Service No 5 is a privately owned dam located in South Huntingdon Township, Pennsylvania, with a primary purpose classified as "Other." Built in 1976, this earth dam stands at 75 feet high and stretches 3050 feet in length, with a storage capacity of 402 acre-feet and a normal storage of 166 acre-feet. The dam sits on the TR SEWICKLEY CREEK, within the jurisdiction of the Pennsylvania Department of Environmental Protection and is subject to state regulation, permitting, inspection, and enforcement.

Despite its low hazard potential, Mill Service No 5 has not been rated for its condition assessment, and its emergency action plan (EAP) status remains undisclosed. The dam has a 5-year inspection frequency and was last inspected in July 2018. While the dam has not been modified in recent years, additional details such as spillway type, spillway width, and outlet gates are not specified. With its location in Westmoreland County and its significance in water resource management, Mill Service No 5 serves as a vital structure within the region's infrastructure, ensuring water supply and management for the surrounding area.