Walnut Canyon in Orange, California, is a local government-owned dam on the Walnut Canyon river stream, completed in 1968 for the primary purpose of water supply. With a height of 187 feet and a hydraulic height of 181 feet, this earth dam has a storage capacity of 2,570 acre-feet and covers a surface area of 47 acres. The dam is regulated and inspected by the California Department of Water Resources (DWR) under the Safety of Dams program, ensuring its safety and compliance with state regulations.

Despite its satisfactory condition assessment, Walnut Canyon Dam presents a high hazard potential due to its location and the amount of water it can store. Regular inspections are conducted, with the last one taking place in May 2020, and emergency action plans are in place to address any potential risks. The dam is situated in a picturesque setting, providing both essential water resources for the local community and a habitat for various wildlife species. Climate and water resource enthusiasts will find Walnut Canyon a fascinating example of infrastructure designed to meet the water supply needs of the region while also highlighting the importance of proper dam management and maintenance in the face of changing environmental conditions.