Lake Leticia, located in Napa, California, is a privately owned water resource that serves multiple purposes including irrigation, recreation, and water supply. Built in 1960, this Earth-type dam stands at a height of 49 feet and has a maximum storage capacity of 115 acre-feet. The dam's primary purpose is to provide water supply, with Tr Milliken Creek being its associated river or stream.

With a surface area of 14 acres and a drainage area of 0.06 square miles, Lake Leticia plays a crucial role in the region's water management system. Despite its satisfactory condition assessment, the dam is classified as having a high hazard potential. Regular inspections are conducted to ensure its safety and compliance with regulatory standards enforced by the California Department of Water Resources. Lake Leticia is not only a key water source but also a vital component in the conservation of water resources and climate adaptation efforts in the area.