Culbertson Lake, located in Nevada County, California, is a privately owned earth dam with a primary purpose of hydroelectric generation. Completed in 1852, this historic structure stands at a height of 20 feet and has a storage capacity of 953 acre-feet, with a normal storage level of 950 acre-feet. The dam spans 255 feet in length and covers a surface area of 70 acres, with a drainage area of 0.4 square miles.

Managed by the Federal Energy Regulatory Commission, Culbertson Lake boasts a low hazard potential and is classified as having a moderate risk level. The dam is equipped with an uncontrolled spillway that is 23 feet wide and has a maximum discharge capacity of 165 cubic feet per second. Although the condition assessment is currently not available, the dam has been inspected by state and federal agencies, with the last inspection conducted in August 2017. While the risk management measures and emergency action plan details are not specified, the dam meets regulatory guidelines and is considered to be in compliance with safety standards.

For water resource and climate enthusiasts, Culbertson Lake offers a glimpse into the historical development of hydroelectric infrastructure in California. With its unique design and operational features, this earth dam serves as a valuable resource for studying water management practices and the impact of dams on local ecosystems. As a regulated structure with state jurisdiction and oversight, Culbertson Lake represents a blend of traditional engineering principles and modern safety protocols, ensuring the continued sustainability of water resources in the region.