Rubicon Main is a hydroelectric dam located in El Dorado County, California, along the Feather River. Built in 1963, this concrete gravity dam stands at 35 feet tall and spans 644 feet in length, with a storage capacity of 1439 acre-feet. Managed by a public utility, the dam's primary purpose is hydroelectric power generation, with additional recreational benefits for the surrounding area.

The dam is regulated by the Federal Energy Regulatory Commission and the California Department of Water Resources, ensuring regular inspections and enforcement of safety measures. Despite its low hazard potential, a moderate risk assessment has been assigned to the dam, indicating a level 3 risk. Emergency action plans are in place, with the last revision in December 2020, to mitigate any potential risks associated with the dam's operation.

With a maximum discharge capacity of 39,000 cubic feet per second and an uncontrolled spillway, Rubicon Main plays a crucial role in water resource management and renewable energy production in the region. Its location in Folsom, California, and its proximity to San Francisco District of the US Army Corps of Engineers make it a vital piece of infrastructure for water supply and climate adaptation efforts in the area.