Pit No. 4 Diversion is a private-owned dam located in Big Bend, California, along the scenic Pit River. This concrete dam was completed in 1927 and stands at an impressive height of 110 feet, with a hydraulic height of 67 feet. The primary purpose of this hydroelectric structure is evident in its design and operation, serving as a vital source of renewable energy in the region.

With a maximum discharge capacity of 77,000 cubic feet per second and a controlled spillway width of 136 feet, Pit No. 4 Diversion is equipped to manage high water levels and mitigate potential flood risks. This dam plays a crucial role in water resource management, providing storage capacity of 1,970 acre-feet and serving a drainage area of 4,643 square miles. Despite its age, the dam is regularly inspected and regulated by both state and federal agencies to ensure its structural integrity and operational safety.

The high hazard potential and very high risk assessment of Pit No. 4 Diversion highlight the importance of effective risk management and emergency preparedness measures in place. With its historical significance and continued contribution to hydroelectric power generation, this dam serves as a testament to the intersection of water resource management, climate resilience, and sustainable energy production in California.