Littlerock, also known as Little Rock Reservoir, is a public utility located in Los Angeles, California. This dam serves multiple purposes, including flood risk reduction, irrigation, and water supply. Built in 1924, the Roller-Compacted Concrete dam stands at 124 feet high and has a storage capacity of 4600 acre-feet. The reservoir covers an area of 126 acres and is situated along the Littlerock Creek.

Managed by the California Department of Water Resources and regulated by the Safety of Dams agency, Littlerock Dam is inspected regularly to ensure its structural integrity. With a high hazard potential, the dam is deemed satisfactory in its condition assessment as of September 2017. In the event of an emergency, an emergency action plan is in place, last revised in February 2020. Overall, Littlerock Dam plays a crucial role in mitigating flood risks and providing essential water resources to the surrounding area.