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77-713: Scofield Reservoir is a 2,815-acre (11.39 km) reservoir impounded by Scofield Dam, in Carbon County, Utah . Located on the Price River , a tributary of the Green River , Scofield Reservoir is adjacent to the northernmost boundary of the Manti–La Sal National Forest . The reservoir sits at an elevation of 7,618 feet (2,322 m), on the northern edge of the Wasatch Plateau . Utah State Route 96 runs along

154-537: A block for migrating fish, trapping them in one area, producing food and a habitat for various water-birds. They can also flood various ecosystems on land and may cause extinctions. Creating reservoirs can alter the natural biogeochemical cycle of mercury . After a reservoir's initial formation, there is a large increase in the production of toxic methylmercury (MeHg) via microbial methylation in flooded soils and peat. MeHg levels have also been found to increase in zooplankton and in fish. Dams can severely reduce

231-791: A chain up the valley. Coastal reservoirs are fresh water storage reservoirs located on the sea coast near a river mouth to store the flood water of a river. As the land-based reservoir construction is fraught with substantial land submergence, coastal reservoirs are preferred economically and technically since they do not use scarce land area. Many coastal reservoirs were constructed in Asia and Europe. Saemanguem in South Korea, Marina Barrage in Singapore, Qingcaosha in China, and Plover Cove in Hong Kong are

308-636: A conventional oil-fired thermal generation plant. For instance, In 1990, the impoundment behind the Balbina Dam in Brazil (inaugurated in 1987) had over 20 times the impact on global warming than would generating the same power from fossil fuels, due to the large area flooded per unit of electricity generated. Another study published in the Global Biogeochemical Cycles also found that newly flooded reservoirs released more carbon dioxide and methane than

385-529: A drop of water seep into the ocean without benefiting mankind." He created the reservoir named Parakrama Samudra ("sea of King Parakrama"). Vast artificial reservoirs were also built by various ancient kingdoms in Bengal, Assam, and Cambodia. Many dammed river reservoirs and most bank-side reservoirs are used to provide the raw water feed to a water treatment plant which delivers drinking water through water mains. The reservoir does not merely hold water until it

462-525: A few such coastal reservoirs. Where water is pumped or siphoned from a river of variable quality or size, bank-side reservoirs may be built to store the water. Such reservoirs are usually formed partly by excavation and partly by building a complete encircling bund or embankment , which may exceed 6 km (4 miles) in circumference. Both the floor of the reservoir and the bund must have an impermeable lining or core: initially these were often made of puddled clay , but this has generally been superseded by

539-455: A high-level reservoir is filled with water using high-performance electric pumps at times when electricity demand is low, and then uses this stored water to generate electricity by releasing the stored water into a low-level reservoir when electricity demand is high. Such systems are called pump-storage schemes. Reservoirs can be used in a number of ways to control how water flows through downstream waterways: Reservoirs can be used to balance

616-570: A loss in both quantity and quality of water necessary for maintaining ecological balance and pose a risk of increasing severity and duration of droughts due to climate change. In summary, they consider it a misadaptation to climate change. Proponents of reservoirs or substitution reserves, on the other hand, see them as a solution for sustainable agriculture while waiting for a truly durable agricultural model. Without such reserves, they fear that unsustainable imported irrigation will be inevitable. They believe that these reservoirs should be accompanied by

693-538: A major Reclamation Bureau dam led to subsequent strengthening of its dam-safety program to avoid similar problems. Even so, the failure of Teton Dam, the environmental movement, and the announcement of President Carter 's "hit list" on water projects profoundly affected the direction of Reclamation's programs and activities. Reclamation operates about 180 projects in the 17 western states. The total Reclamation investment for completed project facilities in September 1992

770-454: A municipal corporation, was organized in 1921 to develop storage facilities in the Price River watershed to replace the destroyed Mammoth Dam. Under the district's direction, Scofield Dam 39°47′12″N 111°07′13″W  /  39.78667°N 111.12028°W  / 39.78667; -111.12028 was constructed during 1925–1926. The reservoir formed behind the dam had a capacity of 6,000 acre⋅ft (7,400,000 m). In May 1928, with

847-419: A narrow valley or canyon may cover relatively little vegetation, while one situated on a plain may flood a great deal of vegetation. The site may be cleared of vegetation first or simply flooded. Tropical flooding can produce far more greenhouse gases than in temperate regions. The following table indicates reservoir emissions in milligrams per square meter per day for different bodies of water. Depending upon

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924-592: A reservoir is called the "conservation pool". In the United Kingdom, "top water level" describes the reservoir full state, while "fully drawn down" describes the minimum retained volume. There is a wide variety of software for modelling reservoirs, from the specialist Dam Safety Program Management Tools (DSPMT) to the relatively simple WAFLEX , to integrated models like the Water Evaluation And Planning system (WEAP) that place reservoir operations in

1001-720: A river valley, with the potential to wash away towns and villages and cause considerable loss of life, such as the devastation following the failure of containment at Llyn Eigiau which killed 17 people. (see also List of dam failures ) A notable case of reservoirs being used as an instrument of war involved the British Royal Air Force Dambusters raid on Germany in World War II (codenamed " Operation Chastise " ), in which three German reservoir dams were selected to be breached in order to damage German infrastructure and manufacturing and power capabilities deriving from

1078-574: A territorial project that unites all water stakeholders with the goal of preserving and enhancing natural environments. Two main types of reservoirs can be distinguished based on their mode of supply. Circa 3000 BC, the craters of extinct volcanoes in Arabia were used as reservoirs by farmers for their irrigation water. Dry climate and water scarcity in India led to early development of stepwells and other water resource management techniques, including

1155-559: A variety of other types of summer and winter recreations. Initially, the Federal government viewed the dam as a flood control measure to prevent damage to vital defense industries and transportation. For the local population, Scofield Dam and Reservoir also supplied irrigation water for surrounding farms. In 1943, local farms grew alfalfa, barley, beans, corn, oats, wheat, potatoes, sugar beets, and pasture. Orchard crops around Helper included peaches, pears, apricots, and apples. Crop values on

1232-407: Is 400 feet (120 m). Total capacity of Scofield Reservoir is 73,600 acre⋅ft (90,800,000 m) with an active capacity of 65,800 acre⋅ft (81,200,000 m). The spillway is an uncontrolled concrete crest and concrete-lined chute at the right abutment. Uses of Scofield Reservoir and its watershed include coal mining, agriculture, residential, fishing, hunting, snowmobiling, camping, and

1309-527: Is 52,000 acre⋅ft (64,000,000 m). Irrigation development of lands served by the Scofield project began in 1883. Ditch companies were organized, and the water was diverted from the natural flow of the Price River. From time to time, canal systems were combined and extended until it was found that the natural flow of the river was inadequate to supply irrigation demands fully. The Mammoth Reservoir Company

1386-471: Is a natural lake whose level was raised by a low dam and into which the River Dee flows or discharges depending upon flow conditions, as part of the River Dee regulation system . This mode of operation is a form of hydraulic capacitance in the river system. Many reservoirs often allow some recreational uses, such as fishing and boating . Special rules may apply for the safety of the public and to protect

1463-480: Is a water reservoir for agricultural use. They are filled using pumped groundwater , pumped river water or water runoff and are typically used during the local dry season. This type of infrastructure has sparked an opposition movement in France, with numerous disputes and, for some projects, protests, especially in the former Poitou-Charentes region where violent demonstrations took place in 2022 and 2023. In Spain, there

1540-437: Is also used technically to refer to certain forms of liquid storage, such the "coolant reservoir" that captures overflow of coolant in an automobile's cooling system. Dammed reservoirs are artificial lakes created and controlled by a dam constructed across a valley and rely on the natural topography to provide most of the basin of the reservoir. These reservoirs can either be on-stream reservoirs , which are located on

1617-399: Is an enlarged lake behind a dam , usually built to store fresh water , often doubling for hydroelectric power generation . Reservoirs are created by controlling a watercourse that drains an existing body of water, interrupting a watercourse to form an embayment within it, excavating, or building any number of retaining walls or levees to enclose any area to store water. The term

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1694-501: Is greater acceptance because all beneficiary users are involved in the implementation of the system. The specific debate about substitution reservoirs is part of a broader discussion related to reservoirs used for agricultural irrigation, regardless of their type, and a certain model of intensive agriculture. Opponents view these reservoirs as a monopolization of resources benefiting only a few, representing an outdated model of productive agriculture. They argue that these reservoirs lead to

1771-466: Is needed: it can also be the first part of the water treatment process. The time the water is held before it is released is known as the retention time . This is a design feature that allows particles and silts to settle out, as well as time for natural biological treatment using algae , bacteria and zooplankton that naturally live in the water. However natural limnological processes in temperate climate lakes produce temperature stratification in

1848-528: Is now used by the Aquarius Golf Club. Service reservoirs perform several functions, including ensuring sufficient head of water in the water distribution system and providing water capacity to even-out peak demand from consumers, enabling the treatment plant to run at optimum efficiency. Large service reservoirs can also be managed to reduce the cost of pumping by refilling the reservoir at times of day when energy costs are low. An irrigation reservoir

1925-419: Is stored in the reservoir. Any excess water can be spilled via a specifically designed spillway. Stored water may be piped by gravity for use as drinking water , to generate hydro-electricity or to maintain river flows to support downstream uses. Occasionally reservoirs can be managed to retain water during high rainfall events to prevent or reduce downstream flooding. Some reservoirs support several uses, and

2002-466: Is the portion of the reservoir that can be used for flood control, power production, navigation , and downstream releases. In addition, a reservoir's "flood control capacity" is the amount of water it can regulate during flooding. The "surcharge capacity" is the capacity of the reservoir above the spillway crest that cannot be regulated. In the United States, the water below the normal maximum level of

2079-692: Is to "manage, develop, and protect water and related resources in an environmentally and economically sound manner in the interest of the American public". In redirecting its programs and responsibilities, Reclamation substantially reduced its staff levels and budgets but remains a significant federal agency in the West. On October 1, 2017, the Hoover Dam Police Department was closed and the National Park Service took over law enforcement duties for

2156-621: The Carbon Water Conservancy District was organized in 1943 for the purpose of negotiating a contract with the United States for the construction of the new dam. Contract negotiations between this district, the Price River Water Conservation District, and the United States were completed in 1943. Construction of the new storage works by the W.W. Clyde Company of Springville, Utah , was undertaken during World War II to prevent possible flood damage to

2233-448: The Ruhr and Eder rivers. The economic and social impact was derived from the enormous volumes of previously stored water that swept down the valleys, wreaking destruction. This raid later became the basis for several films. All reservoirs will have a monetary cost/benefit assessment made before construction to see if the project is worth proceeding with. However, such analysis can often omit

2310-745: The State of Utah , proceeded with the construction of Mammoth Dam. After going through considerable financial difficulty, the Irrigated Lands Co. was reorganized in 1911 to form the Price River Irrigation Co., which developed the project as rapidly as financial conditions and demand for water would permit. The dam failed on June 25, 1917, when it was only partly completed, releasing 11,000 acre⋅ft (14,000,000 m) of water and causing flood damage estimated at $ 1 million to railroad and mining property. The Price River Water Conservation District ,

2387-610: The U.S. Geological Survey (USGS). The new Reclamation Service studied potential water development projects in each western state with federal lands. Revenue from sale of federal lands was the initial source of the program's funding. Because Texas had no federal lands, it did not become a Reclamation state until 1906, when Congress passed a law including it in the provisions of the Reclamation Act. From 1902 to 1907, Reclamation began about 30 projects in Western states. Then, in 1907,

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2464-470: The Utah State Parks system. Scofield has traditionally been one of Utah's top fisheries. Besides producing desirable sizes and quantities of trout , it is unique in that it is an outstanding shore fishery. The reservoir is home to rainbow trout , cutthroat trout , redside shiner , mountain sucker . Common invertebrate species include damselfly , mayfly , and crayfish . It is also popular during

2541-646: The 1800s, most of which are lined with brick. A good example is the Honor Oak Reservoir in London, constructed between 1901 and 1909. When it was completed it was said to be the largest brick built underground reservoir in the world and it is still one of the largest in Europe. This reservoir now forms part of the southern extension of the Thames Water Ring Main . The top of the reservoir has been grassed over and

2618-486: The 1960s and earlier drew to an end. Reclamation wrote that "The arid West essentially has been reclaimed. The major rivers have been harnessed and facilities are in place or are being completed to meet the most pressing current water demands and those of the immediate future". Emphasis in Reclamation programs shifted from construction to operation and maintenance of existing facilities. Reclamation's redefined official mission

2695-516: The Hoover Dam. The Hoover Dam Police Department existed for more than 80 years. Reclamation commissioners that have had a strong impact and molding of the Bureau have included Elwood Mead , Michael W. Straus , and Floyd Dominy , with the latter two being public-power boosters who ran the Bureau during its heyday. Mead guided the bureau during the development, planning, and construction of the Hoover Dam,

2772-710: The Meroitic town of Butana . The Hafirs catch the water during rainy seasons in order to ensure water is available for several months during dry seasons to supply drinking water, irrigate fields and water cattle. The Great Reservoir near the Lion Temple in Musawwarat es-Sufra is a notable hafir in Kush. In Sri Lanka , large reservoirs were created by ancient Sinhalese kings in order to store water for irrigation. The famous Sri Lankan king Parākramabāhu I of Sri Lanka said "Do not let

2849-440: The Scofield project reached over one million dollars in the 1960s and early 1970s. From 1973 to 1974, crop values jumped from $ 1,552,089 to $ 3,672,419. The drought of 1977 caused the value to plunge to $ 1,515,005. Gross crop value reached four million dollars in 1981. While still providing flood protection and sustainable water supply, the reservoir now serves as a popular recreation area. It is part of Scofield State Park , part of

2926-1167: The Secretary of the Interior separated the Reclamation Service from the USGS and created an independent bureau within the Department of the Interior. Frederick Haynes Newell was appointed the first director of the new bureau. Beginning with the third person to take over the direction of Reclamation in 1923, David W. Davis, the title was changed from Director to Commissioner. In the early years, many projects encountered problems: lands or soils included in projects were unsuitable for irrigation ; land speculation sometimes resulted in poor settlement patterns; proposed repayment schedules could not be met by irrigators who had high land-preparation and facilities-construction costs; settlers were inexperienced in irrigation farming; waterlogging of irrigable lands required expensive drainage projects; and projects were built in areas which could only grow low-value crops. In 1923

3003-485: The US. The capacity, volume, or storage of a reservoir is usually divided into distinguishable areas. Dead or inactive storage refers to water in a reservoir that cannot be drained by gravity through a dam's outlet works , spillway, or power plant intake and can only be pumped out. Dead storage allows sediments to settle, which improves water quality and also creates an area for fish during low levels. Active or live storage

3080-608: The United States Bureau of Reclamation. She was confirmed by the United States Senate on November 16, 2017. Burman is the first woman to ever lead the Bureau of Reclamation. David Murillo was serving as the acting commissioner of the bureau. Burman resigned on January 20 after the inauguration of the Biden Administration . The current Commissioner is Camille Calimlim Touton , the first Filipino American to head

3157-529: The United States' first multiple-purpose dam. John W. Keys , the 16th Commissioner of the Bureau of Reclamation who served from July 2001 to April 2006, was killed two years after his retirement on May 30, 2008, when the airplane he was piloting crashed in Canyonlands National Park , Utah . On June 26, 2017, President Donald Trump nominated Brenda Burman to serve as the Commissioner of

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3234-531: The adoption of the plan to replace the unsafe Scofield Dam with a completely new and larger structure to be erected about 800 feet (240 m) downstream from the existing dam. The project was authorized by the president on June 24, 1943, under the terms of the Water Conservation and Utilization Act of August 11, 1939 (53 Stat. 1418), as amended. Under the Utah Water Conservancy Act of 1941,

3311-542: The agency was renamed the "Bureau of Reclamation". In 1924, however, in the face of increasing settler unrest and financial woes, the "Fact Finder's Report" spotlighted major problematic issues; the Fact Finders Act in late 1924 sought to resolve some of these problems. In 1928 Congress authorized the Boulder Canyon ( Hoover Dam ) Project, and large appropriations began, for the first time, to flow to Reclamation from

3388-595: The amount of water reaching countries downstream of them, causing water stress between the countries, e.g. the Sudan and Egypt , which damages farming businesses in the downstream countries, and reduces drinking water. US Bureau of Reclamation On June 17, 1902, in accordance with the Reclamation Act , Secretary of the Interior Ethan Allen Hitchcock established the U.S. Reclamation Service within

3465-523: The area flooded versus power produced, a reservoir built for hydro- electricity generation can either reduce or increase the net production of greenhouse gases when compared to other sources of power. A study for the National Institute for Research in the Amazon found that hydroelectric reservoirs release a large pulse of carbon dioxide from decay of trees left standing in the reservoirs, especially during

3542-428: The base of the dam or some distance away. In a flat river valley a reservoir needs to be deep enough to create a head of water at the turbines; and if there are periods of drought the reservoir needs to hold enough water to average out the river's flow throughout the year(s). Run-of-the-river hydro in a steep valley with constant flow needs no reservoir. Some reservoirs generating hydroelectricity use pumped recharge:

3619-547: The building of a reservoir at Girnar in 3000 BC. Artificial lakes dating to the 5th century BC have been found in ancient Greece. The artificial Bhojsagar lake in present-day Madhya Pradesh state of India, constructed in the 11th century, covered 650 square kilometres (250 sq mi). The Kingdom of Kush invented the Hafir , a type of reservoir, during the Meroitic period . 800 ancient and modern hafirs have been registered in

3696-442: The context of system-wide demands and supplies. In many countries large reservoirs are closely regulated to try to prevent or minimize failures of containment. While much of the effort is directed at the dam and its associated structures as the weakest part of the overall structure, the aim of such controls is to prevent an uncontrolled release of water from the reservoir. Reservoir failures can generate huge increases in flow down

3773-548: The dam located at the narrowest practical point to provide strength and the lowest cost of construction. In many reservoir construction projects, people have to be moved and re-housed, historical artifacts moved or rare environments relocated. Examples include the temples of Abu Simbel (which were moved before the construction of the Aswan Dam to create Lake Nasser from the Nile in Egypt ),

3850-460: The developed world Naturally occurring lakes receive organic sediments which decay in an anaerobic environment releasing methane and carbon dioxide . The methane released is approximately 8 times more potent as a greenhouse gas than carbon dioxide. As a human-made reservoir fills, existing plants are submerged and during the years it takes for this matter to decay, will give off considerably more greenhouse gases than lakes do. A reservoir in

3927-507: The downstream river to maintain river quality, support fisheries, to maintain downstream industrial and recreational uses or for a range of other purposes. Such releases are known as compensation water . The units used for measuring reservoir areas and volumes vary from country to country. In most of the world, reservoir areas are expressed in square kilometers; in the United States, acres are commonly used. For volume, either cubic meters or cubic kilometers are widely used, with acre-feet used in

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4004-440: The environmental impacts of dams and the reservoirs that they contain. Some impacts, such as the greenhouse gas production associated with concrete manufacture, are relatively easy to estimate. Other impacts on the natural environment and social and cultural effects can be more difficult to assess and to weigh in the balance but identification and quantification of these issues is now commonly required in major construction projects in

4081-491: The first decade after flooding. This elevates the global warming impact of the dams to levels much higher than would occur by generating the same power from fossil fuels . According to the World Commission on Dams report (Dams And Development), when the reservoir is relatively large and no prior clearing of forest in the flooded area was undertaken, greenhouse gas emissions from the reservoir could be higher than those of

4158-413: The flow in highly managed systems, taking in water during high flows and releasing it again during low flows. In order for this to work without pumping requires careful control of water levels using spillways . When a major storm approaches, the dam operators calculate the volume of water that the storm will add to the reservoir. If forecast storm water will overfill the reservoir, water is slowly let out of

4235-459: The general funds of the United States. The authorization came only after a hard-fought debate about the pros and cons of public power versus private power. The heyday of Reclamation construction of water facilities occurred during the Depression and the 35 years after World War II . From 1941 to 1947, Civilian Public Service labor was used to carry on projects otherwise interrupted by

4312-580: The hydroelectric reservoirs there do emit greenhouse gases, it is on a much smaller scale than thermal power plants of similar capacity. Hydropower typically emits 35 to 70 times less greenhouse gases per TWh of electricity than thermal power plants. A decrease in air pollution occurs when a dam is used in place of thermal power generation, since electricity produced from hydroelectric generation does not give rise to any flue gas emissions from fossil fuel combustion (including sulfur dioxide , nitric oxide and carbon monoxide from coal ). Dams can produce

4389-432: The landscape is relatively flat. Other service reservoirs can be storage pools, water tanks or sometimes entirely underground cisterns , especially in more hilly or mountainous country. Modern reserviors will often use geomembrane liners on their base to limit seepage and/or as floating covers to limit evaporation, particularly in arid climates. In the United Kingdom, Thames Water has many underground reservoirs built in

4466-519: The main line of the Denver and Rio Grande Western Railroad , the State highway , the telephone and telegraph lines, and the coal mines, all of which were important to the war effort. The new dam was completed June 15, 1946. Scofield Dam is a zoned earthfill structure with a structural height of 125 feet (38 m). The dam's crest length is 575 feet (175 m) with a top width of thirty feet. It contains 204,000 cubic yards of material. The maximum base width

4543-470: The modern use of rolled clay. The water stored in such reservoirs may stay there for several months, during which time normal biological processes may substantially reduce many contaminants and reduce turbidity . The use of bank-side reservoirs also allows water abstraction to be stopped for some time, for instance when the river is unacceptably polluted or when flow conditions are very low due to drought . The London water supply system exhibits one example of

4620-593: The new top water level exceeds the watershed height on one or more of the feeder streams such as at Llyn Clywedog in Mid Wales . In such cases additional side dams are required to contain the reservoir. Where the topography is poorly suited to forming a single large reservoir, a number of smaller reservoirs may be constructed in a chain, as in the River Taff valley where the Llwyn-on , Cantref and Beacons Reservoirs form

4697-415: The operating rules may be complex. Most modern reservoirs have a specially designed draw-off tower that can discharge water from the reservoir at different levels, both to access water as the water level falls, and to allow water of a specific quality to be discharged into the downstream river as "compensation water": the operators of many upland or in-river reservoirs have obligations to release water into

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4774-428: The original streambed of the downstream river and are filled by creeks , rivers or rainwater that runs off the surrounding forested catchments, or off-stream reservoirs , which receive diverted water from a nearby stream or aqueduct or pipeline water from other on-stream reservoirs. Dams are typically located at a narrow part of a downstream of a natural basin. The valley sides act as natural walls, with

4851-477: The pre-flooded landscape, noting that forest lands, wetlands, and preexisting water features all released differing amounts of carbon dioxide and methane both pre- and post-flooding. The Tucuruí Dam in Brazil (completed in 1984) had only 0.4 times the impact on global warming than would generating the same power from fossil fuels. A two-year study of carbon dioxide and methane releases in Canada concluded that while

4928-437: The quality of the water and the ecology of the surrounding area. Many reservoirs now support and encourage less formal and less structured recreation such as natural history , bird watching , landscape painting , walking and hiking , and often provide information boards and interpretation material to encourage responsible use. Water falling as rain upstream of the reservoir, together with any groundwater emerging as springs,

5005-464: The relocation of the village of Capel Celyn during the construction of Llyn Celyn , and the relocation of Borgo San Pietro of Petrella Salto during the construction of Lake Salto . Construction of a dammed reservoir will usually require the river to be diverted during part of the build, often through a temporary tunnel or by-pass channel. In hilly regions, reservoirs are often constructed by enlarging existing lakes. Sometimes in such reservoirs,

5082-403: The reservoir is an important source of water for municipal and industrial sources. It is also a popular fishing and outdoor recreation spot for nearby communities. The reservoir is on the Price River. The reservoir is also fed by groundwater and many small intermittent mountain streams during spring runoff. Principal among these are Fish Creek (Utah) and Clear Creek Canyon (Utah) Annual inflow

5159-471: The reservoir practically filled for the first time, the dam partially failed. Emergency repairs, together with the rapid evacuation of storage water through the outlet tunnel, were effective in preventing complete failure and a devastating flood. Numerous attempts at placing the dam in a safe operating condition were unsuccessful. In view of the apparent weakness of the dam, storage in Scofield Reservoir

5236-627: The reservoir prior to, and during, the storm. If done with sufficient lead time, the major storm will not fill the reservoir and areas downstream will not experience damaging flows. Accurate weather forecasts are essential so that dam operators can correctly plan drawdowns prior to a high rainfall event. Dam operators blamed a faulty weather forecast on the 2010–2011 Queensland floods . Examples of highly managed reservoirs are Burrendong Dam in Australia and Bala Lake ( Llyn Tegid ) in North Wales . Bala Lake

5313-493: The use of bank-side storage: here water is taken from the River Thames and River Lee into several large Thames-side reservoirs, such as Queen Mary Reservoir that can be seen along the approach to London Heathrow Airport . Service reservoirs store fully treated potable water close to the point of distribution. Many service reservoirs are constructed as water towers , often as elevated structures on concrete pillars where

5390-451: The war effort. The last major authorization for construction projects occurred in the late 1960s, while a parallel evolution and development of the American environmental movement began to result in strong opposition to water development projects. Even the 1976 failure of Teton Dam as it filled for the first time did not diminish Reclamation's strong international reputation in water development circles. However, this first and only failure of

5467-412: The water, which tends to partition some elements such as manganese and phosphorus into deep, cold anoxic water during the summer months. In the autumn and winter the lake becomes fully mixed again. During drought conditions, it is sometimes necessary to draw down the cold bottom water, and the elevated levels of manganese in particular can cause problems in water treatment plants. In 2005, about 25% of

5544-465: The western shoreline. After initial attempts to complete a permanent dam on the Price River, the Scofield project was initiated by the US Bureau of Reclamation . The Scofield project eventually irrigated area lands originally to be served by Mammoth Dam , and later by the defunct Gooseberry project. The present-day dam was completed in 1946. Besides providing flood protection due to variable stream flow,

5621-560: The winter as an ice fishery. In recent years the fishery and its management have been impacted due to water quality impairments. The reservoir is also home to the Scofield triathlon, held annually since 2006. To the direct south of the reservoir is the town of Scofield, Utah . Approximately 45 miles (72 km) northwest, lies the Provo – Orem metropolitan area. Reservoir A reservoir ( / ˈ r ɛ z ər v w ɑːr / ; from French réservoir [ʁezɛʁvwaʁ] )

5698-476: The world's 33,105 large dams (over 15 metres in height) were used for hydroelectricity. The U.S. produces 3% of its electricity from 80,000 dams of all sizes. An initiative is underway to retrofit more dams as a good use of existing infrastructure to provide many smaller communities with a reliable source of energy. A reservoir generating hydroelectricity includes turbines connected to the retained water body by large-diameter pipes. These generating sets may be at

5775-641: Was about $ 11 billion. Reclamation projects provide agricultural, household, and industrial water to about one‑third of the population of the American West. About 5% of the land area of the West is irrigated, and Reclamation provides water to about one-fifth of that area, some 9,120,000 acres (37,000 km ) in 1992. Reclamation is a major American generator of electricity . As of 2007 , Reclamation had 58 power plants on‑line and generated 125,000 GJ of electricity. From 1988 to 1994, Reclamation underwent major reorganization as construction on projects authorized in

5852-583: Was incorporated and made filings on the floodwaters of the Price River in 1896. In 1900, a group of farmers from Sanpete County secured the company's rights to store water and convey it by transmountain diversion to their lands. In 1902, the Sanpete group had financial difficulties, and the project passed into the hands of the Irrigated Lands Co. The latter company abandoned the idea of watering Sanpete County lands and made plans to irrigate 25,000 acres (100 km) near Price, Utah . The company, in cooperation with

5929-431: Was strictly limited to a maximum of 30,000 acre⋅ft (37,000,000 m). The replacement of the original dam was expedited during World War II because a potential failure of the existing dam posed a threat to the war effort. The Bureau of Reclamation investigated the development of the Scofield project in accordance with a cooperative contract between the United States and the State of Utah . The study resulted in

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