Angwin, located in Napa, California, is home to a significant earth dam known as the Moore Creek Dam. Completed in 1967, this dam serves the primary purpose of water supply for irrigation and other uses. With a dam height of 35 feet and a capacity of 156 acre-feet, Angwin's dam plays a crucial role in managing water resources in the region.

State-regulated and inspected, the Moore Creek Dam in Angwin boasts a satisfactory condition assessment, highlighting its importance in ensuring water safety and security for the surrounding community. Despite its significant hazard potential, the dam's structural integrity and maintenance have been deemed satisfactory, providing peace of mind for water resource and climate enthusiasts in the area.

With its location in the Sacramento District and under the jurisdiction of the California Department of Water Resources, the Moore Creek Dam in Angwin stands as a vital infrastructure for water management. Its association with the nearby Moore Creek and its capacity to handle drainage from a 0.05 square mile area further underscore its importance in safeguarding water resources and supporting sustainable development in the region.