Heitz is a privately-owned dam located in Napa, California, specifically in the city of Aetna Springs. Built in 1991, this earth dam stands at a height of 87 feet and serves multiple purposes including flood risk reduction, irrigation, and water supply. With a storage capacity of 272 acre-feet and a drainage area of 0.2 square miles, Heitz plays a crucial role in managing water resources in the area.

Managed by the California Department of Water Resources (DWR) under the Safety of Dams program, Heitz is regularly inspected and regulated to ensure its structural integrity and safety. The dam's hazard potential is classified as high, but its condition assessment is deemed satisfactory as of the last inspection in March 2021. The dam has a spillway width, spillway type, and outlet gates information are unknown. Despite this, the risk management measures, emergency action plan status, and inundation maps are not specified.

Heitz's location on Tr Pope Creek and its proximity to the San Francisco District highlight its importance in flood risk reduction efforts in the region. As a key infrastructure for water management, understanding the dam's design, purpose, and regulatory oversight is essential for water resource and climate enthusiasts interested in the intersection of infrastructure and environmental stewardship.