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Folsom Dam
Folsom Dam is a concrete gravity dam on the American River of Northern California in the United States, about northeast of Sacramento. The dam is high and long, flanked by earthen wing dams. It was completed in 1955, and officially opened the following year. Located at the junction of the north and south forks of the American River, the dam was built by the United States Army Corps of Engineers, and was transferred to the United States Bureau of Reclamation upon its completion. The dam and its reservoir, Folsom Lake, are part of the Central Valley Project, a multipurpose project that provides flood control, hydroelectricity, irrigation, and municipal water supply. To increase Sacramento's flood protection to 200-year flood protection (meaning that the area is protected from a flood that has a 0.5% chance of occurring in any given year), the Corps of Engineers recently constructed an auxiliary spillway, which was completed in October 2017; it enables Folsom Dam operators to i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American River
, name_etymology = , image = American River CA.jpg , image_size = 300 , image_caption = The American River at Folsom , map = Americanrivermap.png , map_size = 300 , map_caption = Map of the American River watershed. It includes the North, Middle, and South forks of the river as well as Rubicon River, a tributary of the Middle Fork. , pushpin_map = , pushpin_map_size = , pushpin_map_caption= , subdivision_type1 = Country , subdivision_name1 = United States , subdivision_type2 = State , subdivision_name2 = California , subdivision_type3 = Region , subdivision_name3 = Sacramento Valley , subdivision_type4 = , subdivision_name4 = , subdivision_type5 = City , subdivision_name5 = Sacramento , length = , Northeast-southwestMain stem ; North Fork U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed March 10, 2011 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Outlet Works
A gatehouse, gate house, outlet works or valve house for a dam is a structure housing sluice gates, valves, or pumps (in which case it is more accurately called a pumping station). Many gatehouses are strictly utilitarian, but especially in the nineteenth century, some were very elaborate. Background A set of outlet works is a device used to release and regulate water flow from a dam. Such devices usually consist of one or more pipes or tunnels through the embankment of the dam, directing water usually under high pressure to the river downstream. These structures are usually used when river flow exceeds the capacity of the power plant or diversion capacity of the dam, but do not have flows high enough to warrant the use of the dam spillways. They may also be utilized when river flows must be bypassed due to maintenance work in the power station or diversion gates. Although similar in purpose to spillways, outlet works provide a more controlled release to meet downstream flow requ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mormon Island, California
Mormon Island was once a mining town, which had an abundance of Mormon immigrants seeking gold in the American River during the California Gold Rush. Its site is in present-day Sacramento County, California. History Early in March 1848, W. Sidney, S. Willis, and Wilford Hudson, members of the Mormon Battalion, set out from Sutter's Fort to hunt deer. Stopping on the south fork of the American River, they found gold. They told their story on returning to the fort, and soon about 150 Mormons and other miners flocked to the site, which was named Mormon Island. This was the first major gold strike in California after James W. Marshall's discovery at Coloma. The first ball in Sacramento County was held there on December 25, 1849. The population of the town in 1853 was more than 2,500. It had four hotels, three dry-goods stores, five general merchandise stores, an express office, and many small shops. R. C. Chambers had moved to Mormon Island in July 1850, prior to his mining suc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cofferdam
A cofferdam is an enclosure built within a body of water to allow the enclosed area to be pumped out. This pumping creates a dry working environment so that the work can be carried out safely. Cofferdams are commonly used for construction or repair of permanent dams, oil platforms, bridge piers, etc., built within water. These cofferdams are usually welded steel structures, with components consisting of sheet piles, wales, and cross braces. Such structures are usually dismantled after the construction work is completed. The origin of the word comes from ''coffer'' (originally from Latin ''cophinus'' meaning "basket") and ''dam'' from Proto-German ''*dammaz'' meaning "barrier across a stream of water to obstruct its flow and raise its level"). Uses For dam construction, two cofferdams are usually built, one upstream and one downstream of the proposed dam, after an alternative diversion tunnel or channel has been provided for the river flow to bypass the foundation area o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merritt-Chapman & Scott
Merritt-Chapman & Scott, nicknamed "The Black Horse of the Sea", was a noted marine salvage and construction firm of the United States, with worldwide operations. The chief predecessor company was founded in the 1860s by Israel Merritt, but a large number of other firms were merged in over the course of the company's history. It was taken over in the 1950s by famed corporate raider, Louis E. Wolfson. It ceased operation in the late 1960s or early 1970s. Early history The 1850s and 1860s were a dangerous time for mariners and marine operations around the American continent. The transition from sail to steam with the consequent unreliability of equipment, and the growing needs of commerce to fuel US expansion meant that a large number of ships operated. Some foundered or got into trouble on their own, and some were lured to their doom by wreckers. Salvage operations were in their infancy, and commercial diving was almost unheard of. It was with this background that a number o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Folsom Powerhouse State Historic Park
Folsom Powerhouse State Historic Park is a historical site preserving an 1895 alternating current (AC) hydroelectric power station—one of the first in the United States. Before the Folsom powerhouse was built nearly all electric power houses were using direct current (DC) generators powered by steam engines located within a very few miles of where the power was needed. The use of rushing water to generate hydroelectric power and then transmitting it long distances to where it could be used was not initially economically feasible as long as the electricity generated was low-voltage direct current. Once it was invented, AC power made it feasible to convert the electrical power to high voltage by using the newly invented transformers and to then economically transmit the power long distances to where it was needed. Lower voltage electrical power, which is much easier and safer to use, could be easily gotten by using transformers to convert the high voltage power to lower voltages n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States House Of Representatives
The United States House of Representatives, often referred to as the House of Representatives, the U.S. House, or simply the House, is the lower chamber of the United States Congress, with the Senate being the upper chamber. Together they comprise the national bicameral legislature of the United States. The House's composition was established by Article One of the United States Constitution. The House is composed of representatives who, pursuant to the Uniform Congressional District Act, sit in single member congressional districts allocated to each state on a basis of population as measured by the United States Census, with each district having one representative, provided that each state is entitled to at least one. Since its inception in 1789, all representatives have been directly elected, although universal suffrage did not come to effect until after the passage of the 19th Amendment and the Civil Rights Movement. Since 1913, the number of voting representative ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Congress
The United States Congress is the legislature of the federal government of the United States. It is bicameral, composed of a lower body, the House of Representatives, and an upper body, the Senate. It meets in the U.S. Capitol in Washington, D.C. Senators and representatives are chosen through direct election, though vacancies in the Senate may be filled by a governor's appointment. Congress has 535 voting members: 100 senators and 435 representatives. The U.S. vice president has a vote in the Senate only when senators are evenly divided. The House of Representatives has six non-voting members. The sitting of a Congress is for a two-year term, at present, beginning every other January. Elections are held every even-numbered year on Election Day. The members of the House of Representatives are elected for the two-year term of a Congress. The Reapportionment Act of 1929 establishes that there be 435 representatives and the Uniform Congressional Redistricting Act requires t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydraulic Mining
Hydraulic mining is a form of mining that uses high-pressure jets of water to dislodge rock material or move sediment.Paul W. Thrush, ''A Dictionary of Mining, Mineral, and Related Terms'', US Bureau of Mines, 1968, p.560. In the placer mining of gold or tin, the resulting water-sediment slurry is directed through sluice boxes to remove the gold. It is also used in mining kaolin and coal. Hydraulic mining developed from ancient Roman techniques that used water to excavate soft underground deposits. Its modern form, using pressurized water jets produced by a nozzle called a "monitor", came about in the 1850s during the California Gold Rush in the United States. Though successful in extracting gold-rich minerals, the widespread use of the process resulted in extensive environmental damage, such as increased flooding and erosion, and sediment blocking waterways and covering farm fields. These problems led to its legal regulation. Hydraulic mining has been used in various forms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Folsom Dam Construction (15837842544)
Folsom may refer to: People * Folsom (surname) Places in the United States * Folsom, Perry County, Alabama * Folsom, Randolph County, Alabama * Folsom, California * Folsom, Georgia * Folsom, Louisiana * Folsom, Missouri * Folsom, New Jersey * Folsom, New Mexico * Folsom, Ohio * Folsom, Pennsylvania * Folsom, South Dakota * Folsom, Texas * Folsom, West Virginia * Folsom, Wisconsin * Folsom Lake, California Other uses * Folsom Europe, an annual BDSM and leather subculture street fair held in September in Berlin, Germany * Folsom Field, an outdoor football stadium in Boulder, Colorado * Folsom Library, research library on the campus of Rensselaer Polytechnic Institute, located in Troy, New York * Folsom point, prototype of a spearpoint or arrowhead that was invented by Native Americans and widely distributed in North America. First discovered near Folsom, New Mexico * Folsom Public Library, a library in Folsom, California * Folsom tradition, name given by archa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kilowatt Hour
A kilowatt-hour ( unit symbol: kW⋅h or kW h; commonly written as kWh) is a unit of energy: one kilowatt of power for one hour. In terms of SI derived units with special names, it equals 3.6 megajoules (MJ). Kilowatt-hours are a common billing unit for electrical energy delivered to consumers by electric utilities. Definition The kilowatt-hour is a composite unit of energy equal to one kilowatt (kW) sustained for (multiplied by) one hour. Expressed in the standard unit of energy in the International System of Units (SI), the joule (symbol J), it is equal to 3,600 kilojoules or 3.6 MJ."Half-high dots or spaces are used to express a derived unit formed from two or more other units by multiplication.", Barry N. Taylor. (2001 ed.''The International System of Units.'' (Special publication 330). Gaithersburg, MD: National Institute of Standards and Technology. 20. Unit representations A widely used representation of the kilowatt-hour is "kWh", derived from its co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Base Load Power Plant
The base load (also baseload) is the minimum level of demand on an electrical grid over a span of time, for example, one week. This demand can be met by unvarying power plants, dispatchable generation, or by a collection of smaller intermittent energy sources, depending on which approach has the best mix of cost, availability and reliability in any particular market. The remainder of demand, varying throughout a day, is met by dispatchable generation which can be turned up or down quickly, such as load following power plants, peaking power plants, or energy storage. Power plants that do not change their power output quickly, such as large coal or nuclear plants, are generally called baseload power plants. Donald G. Fink, H. Wayne Beatty (ed), ''Standard Handbook for Electrical Engineers'', Eleventh Edition, Mc-Graw Hill, 1978 , pp. 12-16 through 12-18 Historically, most or all of base load demand was met with baseload power plants, whereas new capacity based around renewables ofte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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