Kidd Lake Main, located in Placer, California, is a privately owned hydroelectric dam on the South Yuba River. Constructed in 1850, this rockfill dam stands at a height of 35 feet and has a maximum storage capacity of 1505 acre-feet. With a normal storage capacity of 1520 acre-feet and a surface area of 86 acres, Kidd Lake Main serves as a vital water resource in the region.

Managed by the Federal Energy Regulatory Commission, Kidd Lake Main has a significant hazard potential and is subject to regular state inspections and enforcement. The dam's spillway is uncontrolled, with a maximum discharge capacity of 1000 cubic feet per second. The risk assessment for this dam is moderate, with a moderate risk management rating given.

Despite its age, Kidd Lake Main continues to play a crucial role in providing hydroelectric power while also serving as a water storage facility for the surrounding area. With its historical significance and ongoing regulatory oversight, this dam remains a key component of the water resource infrastructure in Placer, California.