La Herradura is a privately owned earth dam located in Napa, California, along the Tr Conn Creek. Built in 1948, this dam serves multiple purposes including flood risk reduction, irrigation, and water supply. With a height of 73 feet and a storage capacity of 110 acre-feet, La Herradura plays a crucial role in managing water resources in the region.

Managed by the California Department of Water Resources and regulated by the Safety of Dams program, La Herradura has a low hazard potential and is deemed to be in satisfactory condition. The dam underwent its last inspection in December 2020, with inspections occurring annually to ensure its structural integrity and safety. Despite its relatively small surface area of 5 acres, the dam contributes significantly to the drainage area of 0.52 square miles.

As a key component of flood risk reduction efforts in the area, La Herradura underscores the importance of effective water management practices in the face of a changing climate. With its strategic location and vital functions, this dam exemplifies the intersection of water resource management and climate resilience, making it a noteworthy site for water resource and climate enthusiasts to study and appreciate.