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Rainbow Dam
Rainbow Dam is a hydroelectric dam on the Missouri River, high and long, located six miles northeast of Great Falls in the U.S. state of Montana. History The dam is named for the downstream Rainbow Falls, a waterfall that is the third of the five Great Falls of the Missouri. Built in 1910, the dam furnishes water to an eight-unit hydroelectric plant with a capacity of 36 megawatts. As the dam's power plant is located over a half-mile downstream, the flow of water over Rainbow Falls and downstream Crooked Falls is significantly reduced during the dry season. The water from the penstocks re-enters the river a few hundred yards east of Crooked Falls. Montana Power Company acquired the dam when it was founded in 1912, PPL Corporation purchased it in 1997 and sold it to NorthWestern Corporation in 2014. See also * Ryan Dam References External links *Historic American Engineering Record Heritage Documentation Programs (HDP) is a division of the U.S. National Park Servic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cascade County, Montana
Cascade County (''cascade'' means ''waterfall'' in French) is a county located in the U.S. state of Montana. As of the 2020 census, the population was 84,414, making it the fifth-most populous county in Montana. Its county seat is Great Falls. Cascade County comprises the Great Falls, MT Metropolitan Statistical Area. History At the time of the Lewis and Clark Expedition, Cascade County was the territory of the Blackfeet. The county was named for the falls on the Missouri River. The United States Army at one time had Fort Shaw as an outpost in the northwest part of the county. Only a small settlement is left by that name, a CDP. Geography According to the United States Census Bureau, the county has a total area of , of which is land and (0.5%) is water. The Missouri River and the Sun River flow through the county, and meet at the city of Great Falls. A portion of the Adel Mountains Volcanic Field is in the southwest corner of the county. The Rocky Mountains are in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PPL Corporation
PPL Corporation is an energy company headquartered in Allentown, Pennsylvania in the Lehigh Valley region of eastern Pennsylvania. The company is publicly traded on the New York Stock Exchange. History Pennsylvania Power & Light was founded in 1920 out of a merger of eight smaller Pennsylvania utilities. It gradually extended its service territory to a crescent-shaped region of central and northeastern Pennsylvania stretching from Lancaster through the Lehigh Valley into Scranton and Wilkes-Barre. In 1995, it reorganized as a holding company, PP&L Resources, which changed its name to its current name, PPL Corporation, in 2000. The company limited its activities to Pennsylvania until deregulation of electrical utilities in the 1990s encouraged PPL to purchase assets in other states. The largest of these transactions was PPL's 1998 purchase of 13 plants from Montana Power (leaving NorthWestern Energy – the buyer of the former Montana Power transmission and distribution system ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gravity Dams
A gravity dam is a dam constructed from concrete or stone masonry and designed to hold back water by using only the weight of the material and its resistance against the foundation to oppose the horizontal pressure of water pushing against it. Gravity dams are designed so that each section of the dam is stable and independent of any other dam section. Characteristics Gravity dams generally require stiff rock foundations of high bearing strength (slightly weathered to fresh), although in rare cases, they have been built on soil foundations. The bearing strength of the foundation limits the allowable position of the resultant force, influencing the overall stability. Also, the stiff nature of the gravity dam structure is unforgiving to differential foundation settlement, which can induce cracking of the dam structure. Gravity dams provide some advantages over embankment dams, the main advantage being that they can tolerate minor over-topping flows without damage, as the concre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dams On The Missouri River
A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aquaculture, and navigability. Hydropower is often used in conjunction with dams to generate electricity. A dam can also be used to collect or store water which can be evenly distributed between locations. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees (also known as dikes) are used to manage or prevent water flow into specific land regions. The earliest known dam is the Jawa Dam in Jordan, dating to 3,000 BC. The word ''dam'' can be traced back to Middle English, and before that, from Middle Dutch, as seen in the names of many old cities, such as Amsterdam and Rotterdam. History Ancient dams Early dam building took place in Mesopotamia and the Middle East. Dams were used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dams In Montana
A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, tap water, human consumption, Industrial water, industrial use, aquaculture, and navigability. Hydropower is often used in conjunction with dams to generate electricity. A dam can also be used to collect or store water which can be evenly distributed between locations. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees (also known as Dike (construction), dikes) are used to manage or prevent water flow into specific land regions. The earliest known dam is the Jawa Dam (Jordan), Jawa Dam in Jordan, dating to 3,000 BC. The word ''dam'' can be traced back to Middle English, and before that, from Middle Dutch, as seen in the names of many old cities, such as Amsterdam and Rotterdam. History Ancient dams Early dam build ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dams Completed In 1910
A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aquaculture, and navigability. Hydropower is often used in conjunction with dams to generate electricity. A dam can also be used to collect or store water which can be evenly distributed between locations. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees (also known as dikes) are used to manage or prevent water flow into specific land regions. The earliest known dam is the Jawa Dam in Jordan, dating to 3,000 BC. The word ''dam'' can be traced back to Middle English, and before that, from Middle Dutch, as seen in the names of many old cities, such as Amsterdam and Rotterdam. History Ancient dams Early dam building took place in Mesopotamia and the Middle East. Dams were used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buildings And Structures In Cascade County, Montana
A building, or edifice, is an enclosed structure with a roof and walls standing more or less permanently in one place, such as a house or factory (although there's also portable buildings). Buildings come in a variety of sizes, shapes, and functions, and have been adapted throughout history for a wide number of factors, from building materials available, to weather conditions, land prices, ground conditions, specific uses, prestige, and aesthetic reasons. To better understand the term ''building'' compare the list of nonbuilding structures. Buildings serve several societal needs – primarily as shelter from weather, security, living space, privacy, to store belongings, and to comfortably live and work. A building as a shelter represents a physical division of the human habitat (a place of comfort and safety) and the ''outside'' (a place that at times may be harsh and harmful). Ever since the first cave paintings, buildings have also become objects or canvasses of much artis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Historic American Engineering Record
Heritage Documentation Programs (HDP) is a division of the U.S. National Park Service (NPS) responsible for administering the Historic American Buildings Survey (HABS), Historic American Engineering Record (HAER), and Historic American Landscapes Survey (HALS). These programs were established to document historic places in the United States. Records consist of measured drawings, archival photographs, and written reports, and are archived in the Prints and Photographs Division of the Library of Congress. Historic American Buildings Survey In 1933, NPS established the Historic American Buildings Survey following a proposal by Charles E. Peterson, a young landscape architect in the agency. It was founded as a constructive make-work program for architects, draftsmen and photographers left jobless by the Great Depression. It was supported through the Historic Sites Act of 1935. Guided by field instructions from Washington, D.C., the first HABS recorders were tasked with docume ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ryan Dam
Ryan Dam is a hydroelectric dam on the Missouri River, downstream from the city of Great Falls, Montana, Great Falls in the U.S. state of Montana. The dam is long and high; its reservoir is long and has a storage capacity of . It is a Run-of-the-river hydroelectricity, run-of-river dam. The dam is built on the largest of the five Great Falls (Missouri River), Great Falls of the Missouri, the "Big Falls (Missouri River waterfall), Big Falls", also sometimes called "Great Falls". Since 1915, the six-unit powerhouse on the left side of the dam has occupied a significant portion of the high waterfall. The dam, built in 1915 just upstream of the falls and a small island named Ryan Island, is divided into two parts. On the right side of the dam is a concrete-arch spillway structure, that when functioning, releases water over the remains of the waterfall. The center part of the dam consists of a dike that extends from the falls' base to Ryan Island (separating the tailrace from the ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montana Power Company
The Montana Power Company (MPC) was an electric utility company based in Butte, Montana, which provided electricity to Montana consumers and industry from 1912 to 1997. History The Montana Power Company was founded in 1912 by John D. Ryan, then president of Anaconda Copper Mining Company, as a consolidation of several hydroelectric plants in Montana.Montana Power Co.: GENERATIONS OF POWER: History of Montana Power Co. , ''The Missoulan'' (2001) In the 1960s there was a split, culminating in Anaconda Co. resisting an MPC rate hike. In 1959 MPC bought coal mining rights at , with plans to develop coal-fired electrical generat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NorthWestern Corporation
NorthWestern Corporation owns NorthWestern Energy, a utility company that serves South Dakota, Nebraska, and Montana that is based in Sioux Falls. , the company serves approximately 718,000 customers. The company's corporate headquarters are located in Sioux Falls while the headquarters for the South Dakota operations (and which was the headquarters for the old NorthWestern Public Service Company) are in Huron, South Dakota. History The Montana operations (formerly known as the Montana Power Company) were acquired around 2000 after that state passed legislation allowing the electric utility industry to be 'unbundled'. Out of state investors (led by PP&L Resources) then immediately acquired the generation assets of Montana Power, leaving that part of the territory vulnerable to high "spot" prices on the energy market (creating some chronic discontent that led the Montana Public Service Commission to submit the one "no" vote that effectively nullified a potential sale of NorthWe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megawatt
The watt (symbol: W) is the unit of Power (physics), power or radiant flux in the International System of Units, 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 Energy transformation, energy transfer. The watt is named after James Watt (1736–1819), an 18th-century Scottish people, Scottish invention, inventor, mechanical engineer, and chemist who improved the Newcomen steam engine, Newcomen engine with his own Watt steam engine, steam engine in 1776. Watt's invention was fundamental for the Industrial Revolution. Overview When an object's velocity is held constant at one metre per second against a constant opposing force of one Newton (unit), newton, the rate at which Work (physics), work is done is one watt. : \mathrm In terms of electromagnetism, one watt is the rate at which electrical work is performed when a current of one ampere (A) flows across an electrical potentia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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