ranch consisted of about 117 acres, of which 40 acres had 1,500 fruit trees (pears, persimmons, cherries). The pond is lined with fine-grained alluvium. Nimbus Dam and Lake Natoma Nimbus Dam and Lake Natoma are also included in the vicinity of the Folsom Lake State Recreation Area. Historically, the American River provided approximately 100 miles of stream in which salmon and steelhead could spawn and rear. When the Folsom-Nimbus project was completed in 1958, most of the spawning and rearing areas for the fish were cut off. Nimbus Hatchery was constructed to replace the salmon and steelhead runs that were blocked by Nimbus dam. The Nimbus Fish Hatchery located at Nimbus Dam raises Chinook salmon and steelhead for release to the American River. About 4 million Chinook salmon and 43,000 steelhead are released each year. Educational activities for children and adults are offered. The U.S. Bureau of Reclamation pays the California Department of Fish and Wildlife to operate the hatchery. Lake Natoma is an intermediate lake along the American River, located between Folsom Dam and Nimbus Dam. It is primarily a recreational lake. It includes Negro Bar State Recreation Area. The Sacramento State Aquatic Center is also located here and equipment rentals are available for paddling, rowing, water ski and wakeboard, boating and jet skiing, and sailing and windsurfing. The Sac State Aquatic Center is a cooperation between students at Sacramento State, the University Union at Sac State, California Department of Boating and Waterways, and the California Department of Parks and Recreation. See also List of California state parks References External links California State Recreation Areas Parks in El Dorado County, California Parks in Placer County, California Parks in Sacramento County, California Parks in the San Joaquin Valley American River (California) Folsom, California Protected areas established in 1956 1956 establishments in California