Penn Valley Wastewater, located in California on the Beale Air Force Base, serves as a crucial water supply source for irrigation and general water supply purposes. Completed in 1990, this earth dam stands at a height of 39 feet with a hydraulic height of 35 feet and stretches 540 feet in length. With a storage capacity of 52 acre-feet, it primarily regulates the flow of Tr Indian Spr Cr.

Despite being classified as having a low hazard potential, Penn Valley Wastewater has been deemed to be in satisfactory condition as of the last assessment in September 2017. Regular inspections, with a frequency of once a year, ensure the dam's stability and safety for surrounding communities. In the event of an emergency, the dam's emergency action plan status and readiness remain unspecified. As a vital component of the local water infrastructure, Penn Valley Wastewater plays a crucial role in water resource management and climate resilience efforts in the region.