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San Francisco Water Department
The San Francisco Public Utilities Commission (SFPUC) is a public agency of the City and County of San Francisco that provides water, wastewater, and electric power services to the city and an additional 1.9 million customers within three San Francisco Bay Area counties. Functions The SFPUC manages a complex water supply system consisting of reservoirs, tunnels, pipelines and treatment facilities and is the third largest municipal utility agency in California. The SFPUC protects its watershed properties with security utility trucks and fire apparatus painted white over green. The SFPUC provides fresh water from Hetch Hetchy Reservoir to 2.7 million customers for residential, commercial, and industrial uses. Near one-third of its delivered water is sent to customers within San Francisco, while the remaining two-thirds is sent to Alameda, San Mateo, and Santa Clara counties. Since its creation in February 2005, the SFPUC Power Enterprise Division has supplied power to many city fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Francisco, California
San Francisco (; Spanish for " Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the fourth most populous in California and 17th most populous in the United States, with 815,201 residents as of 2021. It covers a land area of , at the end of the San Francisco Peninsula, making it the second most densely populated large U.S. city after New York City, and the fifth most densely populated U.S. county, behind only four of the five New York City boroughs. Among the 91 U.S. cities proper with over 250,000 residents, San Francisco was ranked first by per capita income (at $160,749) and sixth by aggregate income as of 2021. Colloquial nicknames for San Francisco include ''SF'', ''San Fran'', ''The '', ''Frisco'', and ''Baghdad by the Bay''. San Francisco and the surrounding San Francisco Bay Area are a global center of economic activity and the arts and sciences, spurred ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hetch Hetchy Project
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 be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sunol Temple
The Sunol Water Temple is located at 505 Paloma Way in Sunol, California. Designed by Willis Polk, the 59 foot high classical pavilion is made up of twelve concrete Corinthian columns and a concrete ring girder that supports the conical wood and tile roof. Inside the temple, water originally from the Pleasanton well fields and Arroyo de la Laguna flowed into a white tiled cistern before plunging into a deeper water channel carrying water from the filter galleries to the Niles Aqueduct in Niles Canyon and across San Francisco Bay near the Dumbarton Bridge. The roof covering the cistern has paintings depicting Native American maidens carrying water vessels. The temple is open to the public Monday to Friday, 9 a.m. to 3 p.m. History Since the mid-19th century a private company, the Spring Valley Water Company (SVWC), owned much of the Alameda Creek Watershed and had held a monopoly on water service to San Francisco. In 1906, William Bowers Bourn II, a major stockholder in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hetch Hetchy Aqueduct
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 be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleasanton, California
Pleasanton is a city in Alameda County, California, United States. Located in the Amador Valley, it is a suburb in the East Bay region of the San Francisco Bay Area. The population was 79,871 at the 2020 United States Census, 2020 census. In 2005 and 2007, Pleasanton was ranked the wealthiest middle-sized city in the United States by the Census Bureau. Pleasanton is home to the headquarters of Safeway Inc., Safeway, Workday, Inc., Workday, Ellie Mae, Roche Molecular Diagnostics, Blackhawk Network Holdings, and Veeva Systems. Other major employers include Kaiser Permanente, Oracle Corporation, Oracle and Macy's. Although Oakland is the Alameda County seat, a few county offices are located in Pleasanton. The Alameda County Fairgrounds are located in Pleasanton, where the county fair is held during the last week of June and the first week of July. Pleasanton Ridge Regional Park is located on the west side of town. History Alisal Before the establishment of Pleasanton in the 1850 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artesian Well
An artesian aquifer is a confined aquifer containing groundwater under positive pressure. An artesian aquifer has trapped water, surrounded by layers of impermeable rock or clay, which apply positive pressure to the water contained within the aquifer. If a well were to be sunk into an artesian aquifer, water in the well-pipe would rise to a height corresponding to the point where hydrostatic equilibrium is reached. A well drilled into such an aquifer is called an ''artesian well''. If water reaches the ground surface under the natural pressure of the aquifer, the well is termed a ''flowing artesian well''. Fossil water aquifers can also be artesian if they are under sufficient pressure from the surrounding rocks, similar to how many newly tapped oil wells are pressurized. From the previous statement, it can be inferred that not all aquifers are artesian (i.e., water table aquifers occur where the groundwater level at the top of the aquifer is at equilibrium with atmospher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Infiltration Gallery
An infiltration gallery is a structure including perforated conduits in gravel to expedite transfer of water to or from a soil. Water supply Infiltration galleries may be used to collect water from the aquifer underlying a river. Water from an infiltration gallery has the advantage of bank filtration to reduce the water treatment requirements for a surface withdrawal. An infiltration gallery may also be the best way to withdraw water from a thin aquifer or lens of fresh water overlying saline water. Storm water disposal Infiltration galleries may be used to supplement a storm sewer, by directing storm runoff from non-road areas. While the catchbasins under sewer grates work well on swift-flowing surfaces like asphalt and concrete, heavy storm water flow on grass lawns or other open areas will pool in low areas if there is no outlet. An infiltration gallery serves this purpose in two ways. Primarily, upright plastic pipes capped with simple grates are placed every 5–8 metres al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alameda Creek
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Arroyo De La Laguna
Arroyo de la Laguna is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed March 15, 2011 southward-flowing stream in Alameda County, California, United States which originates at the confluences of South San Ramon Creek and Arroyo Mocho. The Arroyo de la Laguna is fed by tributaries in the Amador Valley and certain eastern slope drainages of the Diablo Range; these tributaries include Arroyo Valle and Sinbad Creek. Arroyo del la Laguna is the major tributary to Alameda Creek which in turn flows into the San Francisco Bay. From prehistoric times much of the eastern part of the Amador Valley consisted of a lake known as Tulare Lake. With development of the valley starting in the 19th century, drainage alterations in this watershed reduced the lake to a watercourse now called the Arroyo de la Laguna. Hydrogeology In the northern portion of the Arroyo de la Laguna catchment basin, the Tassajara Formation underlies Qu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Willis Polk
Willis Jefferson Polk (October 3, 1867 – September 10, 1924) was an American architect, best known for his work in San Francisco, California. For ten years, he was the West Coast representative of D.H. Burnham & Company. In 1915, Polk oversaw the architectural committee for the Panama–Pacific International Exposition (PPIE). Early life and education Willis Polk was born on October 3, 1867 in Jacksonville, Illinois to architect builder Willis Webb Polk (1836-1906). The eldest of four children, in 1873 he moved with his family to Saint Louis, Missouri and again by 1881 to Hope, Arkansas. Willis Jr began his architectural training with his brother Daniel in his father's office. In 1885, Polk's family moved again to Kansas City, where Willis Webb Polk, the father, serving as a founding member of the Kansas City Architects Association, was able to introduce his eldest son to Adriance Van Brunt, principal of the firm Van Brunt & Howe to gain more experience as a draftsperson. Sin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Empire Mine State Historic Park
Empire Mine State Historic Park is a state-protected mine and park in the Sierra Nevada mountains in Grass Valley, California, U.S. The Empire Mine is on the National Register of Historic Places, a federal Historic District, and a California Historical Landmark. Since 1975 California State Parks has administered and maintained the mine as a historic site. The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California". Between 1850 and its closure in 1956, the Empire Mine produced 5.8 million ounces (165 tons) of gold, extracted from of underground passages. History In October 1850, George Roberts discovered gold in a quartz outcrop on Ophir Hill, but sold the claim in 1851 to Woodbury, Parks and Co. for $350 (or about $ today, adjusted for inflation). The Woodbury Company consolidated several local claims into the Ophir Hill Mine, but they mismanaged their finances and in 1852 were forced to sell the business at auction. It was purchased ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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