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Tuolumne River
The Tuolumne River ( Yokutsan: ''Tawalimnu'') flows for through Central California, from the high Sierra Nevada to join the San Joaquin River in the Central Valley. Originating at over above sea level in Yosemite National Park, the Tuolumne drains a rugged watershed of , 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. Humans have inhabited the Tuolumne River area for up to 10,000 years. Prior to the arrival of Europeans, the river canyon provided an important summer hunting ground and a trade route between Native Americans in the Central Valley to the west and the Great Basin to the east. First named in 1806 by a Spanish explorer after a nearby indigenous village, the Tuolumne w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hetch Hetchy
Hetch Hetchy is a valley, reservoir, and 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 beg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glen Aulin
Glen Aulin is a segment of the Tuolumne River valley, upriver from the Grand Canyon of the Tuolumne. Glen Aulin is home to the Glen Aulin High Sierra Camp. The name, meaning beautiful valley or glen ("Gleann Alainn" in Gaelic), was suggested by James McCormick of the United States Geographic Board to R.B. Marshall of the USGS The United States Geological Survey (USGS), founded as the Geological Survey, is an government agency, agency of the United States Department of the Interior, U.S. Department of the Interior whose work spans the disciplines of biology, geograp .... References Yosemite National Park {{California-river-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydroelectricity
Hydroelectricity, or hydroelectric power, is Electricity generation, electricity generated from hydropower (water power). Hydropower supplies 15% of the world's electricity, almost 4,210 TWh in 2023, which is more than all other Renewable energy, renewable sources combined and also more than nuclear power. Hydropower can provide large amounts of Low-carbon power, low-carbon electricity on demand, making it a key element for creating secure and clean electricity supply systems. A hydroelectric power station that has a dam and reservoir is a flexible source, since the amount of electricity produced can be increased or decreased in seconds or minutes in response to varying electricity demand. Once a hydroelectric complex is constructed, it produces no direct waste, and almost always emits considerably less greenhouse gas than fossil fuel-powered energy plants. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lyell Canyon
Lyell Canyon is a sub-alpine meadow in Yosemite National Park south of Tuolumne Meadows. For 8 miles(13 kilometers) most of the canyon has an approximate elevation of , and then rapidly climbs to to Donohue Pass, below Donohue Peak – which marks the eastern boundary of Yosemite. The valley at the base is relatively flat and wide, following the Lyell Fork of the Tuolumne River through an open meadow and wooded areas. The Lyell Fork eventually meets with Tuolumne River. The canyon as well as Mount Lyell to the west is named after Charles Lyell, a well-known 19th century geologist and friend of Charles Darwin. The canyon is an easy hike from Tuolumne Meadows campground. The John Muir Trail and the Pacific Crest Trail The Pacific Crest Trail (PCT), officially designated as the Pacific Crest National Scenic Trail, is a long-distance hiking and equestrian trail closely aligned with the highest portion of the Cascade and Sierra Nevada mountain ranges, which lie ... both rou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Lyell (California)
Mount Lyell is the highest point in Yosemite National Park, at . It is located at the southeast end of the Cathedral Range, northwest of Rodgers Peak. The peak as well as nearby Lyell Canyon is named after Charles Lyell, a well-known 19th century geologist. The peak had one of the last remaining glaciers in Yosemite, Lyell Glacier. The Lyell Glacier is currently considered to be a permanent ice field, not a living glacier. Mount Lyell divides the Tuolumne River watershed to the north, the Merced to the west, and the Rush Creek drainage in the Mono Lake Basin to the southeast. Climbing The most common approach to Mount Lyell is from Tuolumne Meadows on a highly traveled section of the John Muir Trail. The round trip is approximately and involves of elevation gain when starting from the Tuolumne Wilderness Office. The hike is easy from Tuolumne Meadows, following the Tuolumne River to the head of the Lyell Canyon, and becomes moderate as it approaches Donohue Pass. Before re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lyell Glacier
Lyell Glacier is in the Sierra Nevada of California. The glacier was discovered by John Muir in 1871, and was the largest glacier in Yosemite National Park. It lies on the northern slopes of Mount Lyell. The glacier has retreated since the end of the Little Ice Age in the mid-19th century. During the mid-20th Century, the glacier split into two smaller glaciers occupying the high cirques of Mount Lyell. Since 1883, the glacier area has retreated up to 70 percent. Another glacier, the Maclure Glacier on nearby Mount Maclure, has also retreated significantly. According to a study in 2013, today the Lyell is no longer a glacier, having lost any movement and thus it should be considered an ice field. See also *List of glaciers in the United States Glaciers are located in ten states, with the vast majority in Alaska. The southernmost named glacier is the Lilliput Glacier in Tulare County, California, Tulare County, east of the Central Valley (California), Central Valley ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Don Pedro Dam
New Don Pedro Dam, often known simply as Don Pedro Dam, is an earthen embankment dam across the Tuolumne River, about 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 dam serves mainly for irrigation water storage, flood control and hydroelectricity production, and impounds Don Pedro Reservoir in the foothills of the Sierra Nevada. The New Don Pedro Dam is owned and operated by the Modesto Irrigation District (MID) and Turlock Irrigation District (TID). At tall, the dam is the tenth highest in the U.S. and its reservoir is the sixth largest artificial lake in California. The original dam was named for the old mining town of Don Pedros Bar on the Tuolumne River, which in turn takes its name from prospector Pierre "Don Pedro" Sainsevain. Background Shortly after their formation in 1887, the MID and TID acquired water rights to the Tuolumne Riv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Environmental Movement
The environmental movement (sometimes referred to as the ecology movement) is a social movement that aims to protect the natural world from harmful environmental practices in order to create sustainable living. In its recognition of humanity as a participant in (not an enemy of) ecosystems, the movement is centered on ecology, health, as well as human rights. The environmental movement is an international movement, represented by a range of environmental organizations, from enterprises to grassroots and varies from country to country. Due to its large membership, varying and strong beliefs, and occasionally speculative nature, the environmental movement is not always united in its goals. At its broadest, the movement includes private citizens, professionals, Religion and environmentalism, religious devotees, politicians, scientists, nonprofit organizations, and individual advocates like former Wisconsin Senator Gaylord Nelson and Rachel Carson in the 20th century. Since the 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Francisco
San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of 2024, San Francisco is the List of California cities by population, fourth-most populous city in the U.S. state of California and the List of United States cities by population, 17th-most populous in the United States. San Francisco has a land area of at the upper end of the San Francisco Peninsula and is the County statistics of the United States, fifth-most densely populated U.S. county. Among U.S. cities proper with over 250,000 residents, San Francisco is ranked first by per capita income and sixth by aggregate income as of 2023. San Francisco anchors the Metropolitan statistical area#United States, 13th-most populous metropolitan statistical area in the U.S., with almost 4.6 million residents in 2023. The larger San Francisco Bay Area ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Don Pedro Dam
The Don Pedro Dam, since 1971 also known as the Old Don Pedro Dam, was a dam across the Tuolumne River in Tuolumne County, California. The structure still exists and is flooded underneath Don Pedro Reservoir, which is formed by the New Don Pedro Dam. Construction It was a solid concrete gravity dam that was high, wide, thick at the crest, and thick at the base. It was completed in 1923 where the Tuolumne River had carved a narrow gorge with walls of solid rock about a mile (2 km) below Don Pedro Bar. The reservoir created by this dam contained of water when full, 14.3% of today's capacity. A 15 megawatt power plant was part of the dam's original design, and two more 7500 kilowatt The watt (symbol: W) is the unit of Power (physics), power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantification (science), quantify the rate of Work ... generators were added in 1926 for 30 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irrigation District
In the United States an irrigation district is a cooperative, self-governing public corporation set up as a subdivision of the State government, with definite geographic boundaries, organized, and having taxing power to obtain and distribute water for irrigation of lands within the district; created under the authority of a State legislature with the consent of a designated fraction of the landowners or citizens. It is a special-purpose district created by statute in order to develop large irrigation projects. These districts have the power to tax, borrow, and condemn. Sample districts See also * Deficit irrigation * Environmental effects of irrigation *'' Huerta'' * Irrigation methods * Irrigation District Act of 1916 (Smith Act) * Irrigation Districts and Farm Loans Act *Water district A water district is a Special-purpose district, special district given the task of supplying water and sewer needs to a community. This term is commonly used in the United States. See also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Modesto, California
Modesto ( ; ) is the county seat and largest city of Stanislaus County, California, United States. With a population of 218,069 according to 2022 United States Census Bureau, U.S. Census Bureau estimates, it is the List of cities and towns in California, 19th-most populous city in California. Modesto is located in the Central Valley (California), Central Valley List of regions of California, region, south of Sacramento, California, Sacramento and north of Fresno, California, Fresno. Distances from other places include: north of Merced, California, east of San Francisco, west of Yosemite National Park, and south of Stockton, California, Stockton. The city, in the San Joaquin Valley, is surrounded by rich farmland. Stanislaus County ranks sixth among California counties in farm production. It is home to E & J Gallo Winery, Gallo Family Winery, the largest Family business, family-owned winery in the United States. Led by milk, almonds, chickens, walnuts, and corn silage, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
