Exchequer Main, located in Mariposa, California, is a rockfill dam completed in 1966 with a primary purpose of hydroelectric power generation. It stands at a height of 490 feet and has a storage capacity of 1,100,000 acre-feet, serving multiple purposes including fire protection, irrigation, and recreation. The dam is regulated by the Federal Energy Regulatory Commission and the California Department of Water Resources, ensuring its safety and compliance with state and federal regulations.

The Merced River is the primary source of water for Exchequer Main, with a drainage area of 1,037 square miles and a maximum discharge capacity of 531,600 cubic feet per second. The dam's spillway is controlled with a width of 1,360 feet, and it is equipped with six Tainter gates for water release. Despite being classified as having a high hazard potential, the dam's risk assessment is very high, emphasizing the importance of regular inspections and emergency preparedness. Overall, Exchequer Main plays a critical role in water resource management and climate adaptation efforts in California.

With its strategic location in Snelling and its crucial role in water storage and flood risk reduction, Exchequer Main stands as a vital infrastructure for the region. Its contribution to hydroelectric power generation and its multi-purpose functionality highlight the importance of sustainable water resource management in the face of changing climate conditions. As a key asset in California's water infrastructure, Exchequer Main underscores the need for ongoing monitoring, maintenance, and risk management to ensure the safety and reliability of the dam for future generations.