Hetch Hetchy is a valley, a reservoir, and a water system in California in the United States. The glacial Hetch Hetchy Valley lies in the northwestern part of Yosemite National Park and is drained by the Tuolumne River. For thousands of years before the arrival of settlers from the United States in the 1850s, the valley was inhabited by Native Americans who practiced subsistence hunting-gathering. During the late 19th century, the valley was renowned for its natural beauty – often compared to that of Yosemite Valley – but also targeted for the development of water supply for irrigation and municipal interests. The controversy over damming Hetch Hetchy became mired in the political issues of the day. The law authorizing the dam passed Congress on December 7, 1913. In 1923, the O'Shaughnessy Dam was completed on the Tuolumne River, flooding the entire valley under the Hetch Hetchy Reservoir. The dam and reservoir are the centerpiece of the Hetch Hetchy Project, which in 1934 began to deliver water 167 miles (269 km) west to San Francisco and its client municipalities in the greater San Francisco Bay Area.
The Tuolumne River flows for 149 miles (240 km) through Central California, from the high Sierra Nevada to join the San Joaquin River in the Central Valley. Originating at over 8,000 feet (2,400 m) above sea level in Yosemite National Park, the Tuolumne drains a rugged watershed of 1,958 square miles (5,070 km2), carving a series of canyons through the western slope of the Sierra. While the upper Tuolumne is a fast-flowing mountain stream, the lower river crosses a broad, fertile and extensively cultivated alluvial plain. Like most other central California rivers, the Tuolumne is dammed multiple times for irrigation and the generation of hydroelectricity.
Human habitation in the Sierra Nevada region of California reaches back 8,000 to 10,000 years ago. Historically attested Native American populations, such as the Sierra Miwok, Mono and Paiute, belong to the Uto-Aztecan and Utian phyla. In the mid-19th century, a band of Native Americans called the Ahwahnechee lived in Yosemite Valley. The California Gold Rush greatly increased the number of non-indigenous people in the region. Tensions between Native Americans and white settlers escalated into the Mariposa War. As part of this conflict, settler James Savage led the Mariposa Battalion into Yosemite Valley in 1851, in pursuit of Ahwaneechees led by Chief Tenaya. The California state military forces burned the tribe's villages, destroyed their food stores, killed the chief's sons, and forced the tribe out of Yosemite. Accounts from the Mariposa Battalion, especially from Dr. Lafayette Bunnell, popularized Yosemite Valley as a scenic wonder.
In 1942, the Coleman National Fish Hatchery was established under an act of the U.S. Congress to mitigate the loss of historic spawning habitat caused by the construction of dams. The fish hatchery is located in Shasta County, California, near the town of Anderson on the north bank of Battle Creek approximately 6 river miles (9.7 km) east of the Sacramento River. Coleman NFH covers approximately 75 acres (300,000 m2) of land owned by the U.S. Fish and Wildlife Service (USFWS), with an additional 63 acres (250,000 m2) of land in perpetual easements for pipelines and access. It is the largest salmon hatchery in the continental United States.
Don Pedro Reservoir, also known as Lake Don Pedro, is a reservoir formed by the construction of the New Don Pedro Dam across the Tuolumne River in Tuolumne County, California, United States.
The Raker Act was an act of the United States Congress that permitted building of the O'Shaughnessy Dam and flooding of Hetch Hetchy Valley in Yosemite National Park, California. It is named for John E. Raker, its chief sponsor. The Act, passed by Congress in 1913 during the Wilson administration, specified that because the source of the water and power was on public land, no private profit could be derived from the development. The plan for damming the valley was fought for years by John Muir. Construction of the dam was finished in 1923.
Cherry Creek is a large, swift-flowing stream in the Sierra Nevada mountain range, and is the largest tributary of the Tuolumne River. The creek is 44.6 miles (71.8 km) long measured to its farthest headwaters; the main stem itself is 27.7 miles (44.6 km) long, draining a watershed of 234 square miles (610 km2) in the Stanislaus National Forest. Part of the drainage also extends into the northwest corner of Yosemite National Park.
Cherry Lake is an artificial lake in the Stanislaus National Forest of Tuolumne County, California, U.S.A., about 25 miles (40 km) east of the city of Sonora. It is at an elevation of 4,700 feet (1,433 m) on the western side of the Sierra Nevada, and lies just outside the western boundary of Yosemite National Park. The lake has a capacity of 273,500 acre⋅ft (337,400,000 m3) and is formed by Cherry Valley Dam on Cherry Creek.
Pine Mountain Lake (PML) is a private gated community and a census-designated place (CDP) in Tuolumne County, California. It is located 0.8 miles (1.3 km) north and east of Groveland. Pine Mountain Lake sits at an elevation of 2,795 feet (852 m). The 2010 United States census reported Pine Mountain Lake's population was 2,796.
Lake Natoma is a small lake in the Western United States, along the lower American River, between Folsom and Nimbus Dams in Sacramento County, California. The lake is located within the Folsom Lake State Recreation Area which maintains the facilities and bike trails surrounding the lake. Lake Natoma is located 15 miles (24 km) east of Sacramento, and has 500 surface acres of water. The total length of lake Natoma is 4 miles (6.4 km).
Lake Burton Fish Hatchery is a fish hatchery operated by the Wildlife Resources Division of the Georgia Department of Natural Resources for the purpose of raising rainbow trout and brown trout being raised for stocking into mountain trout streams in North Georgia, United States. The hatchery located on the shores of Lake Burton in Rabun County, Georgia next to Moccasin Creek and adjacent to Moccasin Creek State Park. It is on Georgia State Route 197 approximately 20 miles north of Clarkesville, Georgia.
The Nimbus Dam is a base load hydroelectric dam on the American River near Folsom, California. Approximately 8,700 acre-feet (10,700 dam3) of water is retained by the dam. It is responsible for the impoundment of water from the American River to create the Lake Natoma reservoir. The dam stands 87 feet and spans 1,093 feet. The Nimbus powerplant consists of two generators. Each generator produces enough electrical power to power over 200,000 100-watt light bulbs, about 15,500 kilowatts of electrical power. Nimbus Dam consists of 18 radial gates, each with their own gate bays. These 18 gates today are the ones that were completed in 1955 along with the rest of the dam. Of the eighteen gates, four of them have had their coating system replaced. This protects the gates from a faster rate of corrosion. The other fourteen gates have the original coating.
The Hetch Hetchy Railroad (HHRR) was a 68-mile (109 km) standard gauge Class III railroad constructed by the City of San Francisco to support the construction and expansion of the O'Shaughnessy Dam across Hetch Hetchy Valley.
Lost Creek Lake is a reservoir located on the Rogue River in Jackson County, Oregon, United States. The lake is impounded by William L. Jess Dam which was constructed by the U.S. Army Corps of Engineers in 1977 for flood control and fisheries enhancement. The lake and dam were the first completed elements of the multi-purpose Rogue River Basin Project, consisting of Lost Creek Lake, Applegate Lake and the Elk Creek project. The lake is located approximately 27 miles (43 km) northeast of Medford.
The Golden Trout Wilderness is a federally designated wilderness area in the Sierra Nevada, in Tulare County and Inyo County, California. It is located 40 miles (64 km) east of Porterville within Inyo National Forest and Sequoia National Forest.
The environment of California describes results of human habitation of the American State of California.
New Don Pedro Dam, often known simply as Don Pedro Dam, is an earthen embankment dam across the Tuolumne River, about 2 miles (3.2 km) northeast of La Grange, in Tuolumne County, California. The dam was completed in 1971, after four years of construction, to replace the 1924 concrete-arch Don Pedro Dam.
The Modesto Irrigation District (MID) is a special-purpose district that provides irrigation and drinking water, and electrical service, to customers in the San Joaquin Valley within Stanislaus County, California.
O'Shaughnessy Dam is a 430-foot (131 m) high concrete arch-gravity dam in Tuolumne County, California, United States. It impounds the Tuolumne River, forming the Hetch Hetchy Reservoir at the lower end of Hetch Hetchy Valley in Yosemite National Park, about 160 miles (260 km) east of San Francisco. The dam and reservoir are the source for the Hetch Hetchy Aqueduct, which provides water for over two million people in San Francisco and other municipalities of the west Bay Area. The dam is named for engineer Michael O'Shaughnessy, who oversaw its construction.
Moccasin Dam is a small dam on Moccasin Creek in Tuolumne County, California, in the town of Moccasin, west of Yosemite. It holds the Moccasin Reservoir. The dam, reservoir and associated hydroelectric power plant are part of the Hetch Hetchy Project, which provide water and power to the city of San Francisco. The dam is located near the junction of Highway 120 and Highway 49.
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