Grass Lake in Plumas, California, is a Federal-owned Earth dam structure completed in 1893 by the USDA Forest Service. With a primary purpose of Fish and Wildlife Pond, this dam stands at a height of 10 feet and a length of 220 feet, creating a storage capacity of 180 acre-feet. The dam has a low hazard potential and a moderate risk assessment rating.

Located in the San Francisco District, Grass Lake serves as a vital resource for recreation and wildlife in the area. Despite not being regulated by the state, the Forest Service manages the inspection, construction, and operations of the dam, ensuring its safety and functionality. With a spillway width of 15 feet and a maximum discharge capacity of 275 cubic feet per second, Grass Lake is well-equipped to handle any potential overflow events.

Water resource and climate enthusiasts will appreciate the historical significance and ecological importance of Grass Lake. As a key feature in the local landscape, this dam provides essential support for fish and wildlife habitats while offering recreational opportunities for visitors. With its strategic design and maintenance by the Forest Service, Grass Lake continues to be a valuable asset for both the environment and the community.