James J. Lenihan, also known as Lexington Reservoir, is a vital water resource located in Santa Clara, California. Owned by a public utility, this dam serves the primary purpose of water supply for irrigation and domestic use. Completed in 1953, this earth-type dam stands at a height of 208 feet and has a storage capacity of 21,430 acre-feet.

Situated on the Los Gatos Creek, James J. Lenihan plays a crucial role in providing water to the surrounding areas, ensuring a stable water supply for agricultural and residential needs. With a high hazard potential but a satisfactory condition assessment as of September 2017, this dam is regulated and inspected by the California Department of Water Resources (DWR) for safety and compliance.

Maintaining a close distance of 2 miles from the city of Los Gatos, this reservoir is a key component of the water infrastructure in the region. With a rich history dating back to the early 1950s, James J. Lenihan continues to be a significant asset in managing water resources and climate resilience in Santa Clara County.