Lee Lake, also known as Corona Lake, is a historic earth dam in Riverside County, California, completed in 1893 for water supply purposes. Located in the city of Corona, the dam stands at 47 feet high with a storage capacity of 1100 acre-feet. It is situated on Temescal Creek, serving as a crucial source of water for irrigation and municipal use in the region.

Despite its age, Lee Lake dam faces challenges with a high hazard potential and poor condition assessment. The last inspection in January 2022 revealed the need for improvements, with the dam being regulated, permitted, and inspected by the California Department of Water Resources for safety compliance. The dam's emergency action plan was last revised in April 2021, emphasizing the importance of preparedness in the event of a potential breach or disaster.

With a drainage area of 56.18 square miles and a maximum discharge capacity of 12,347 cubic feet per second, Lee Lake remains a significant water resource in the region. However, ongoing risk assessment and management measures are essential to ensure the safety and functionality of this vital infrastructure for water supply and climate enthusiasts alike.