Bagnell Dam
| Bagnell Dam | |||||||||||||||||||||||
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Bagnell Dam
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| Country | United States | ||||||||||||||||||||||
| Location | Missouri | ||||||||||||||||||||||
| Coordinates | 38°12′08″N 92°37′37″W / 38.20222°N 92.62694°WCoordinates: 38°12′08″N 92°37′37″W / 38.20222°N 92.62694°W | ||||||||||||||||||||||
| Purpose | Hydroelectric | ||||||||||||||||||||||
| Construction began | 1929 | ||||||||||||||||||||||
| Opening date | 1931 | ||||||||||||||||||||||
| Owner(s) | AmerenUE | ||||||||||||||||||||||
| Dam and spillways | |||||||||||||||||||||||
| Type of dam | Concrete gravity | ||||||||||||||||||||||
| Impounds | Osage River | ||||||||||||||||||||||
| Height (foundation) | 148 ft (45 m) | ||||||||||||||||||||||
| Length | 2,543 ft (775 m) | ||||||||||||||||||||||
| Spillway type | Gated overflow | ||||||||||||||||||||||
| Reservoir | |||||||||||||||||||||||
| Creates | Lake of the Ozarks | ||||||||||||||||||||||
| Total capacity | 1,927,000 acre·ft (2.377 km3) | ||||||||||||||||||||||
| Active capacity | 468,000 acre·ft (0.577 km3) | ||||||||||||||||||||||
| Catchment area | 13,944 sq mi (36,110 km2) | ||||||||||||||||||||||
| Surface area | 54,000 acres (22,000 ha) | ||||||||||||||||||||||
| Normal elevation | 660 ft (200 m) max | ||||||||||||||||||||||
| Osage Powerplant | |||||||||||||||||||||||
| Type | Conventional | ||||||||||||||||||||||
| Hydraulic head | 90 ft (27 m) | ||||||||||||||||||||||
| Turbines | Main: 8x 21.5 MW (33,500 HP) Francis Station service: 2x 2.0 MW (3,025 HP) Francis |
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| Installed capacity | 176.0 MW 220 MW (overload) |
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| Annual generation | 957,340,000 KWh | ||||||||||||||||||||||
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Bagnell Dam and Osage Power Plant
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| Location | 617 River Rd., Lakeside, Missouri |
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| Area | 6 acres (2.4 ha) |
| Built | 1931 |
| Architect | Stone & Webster |
| Architectural style | Other, Gravity Dam |
| NRHP Reference # | 08000822 |
| Added to NRHP | August 27, 2008 |
Bagnell Dam impounds the Osage River in the U.S. state of Missouri, creating the Lake of the Ozarks. The 148-foot (45 m) tall concrete gravity dam was built by the Union Electric Company (now AmerenUE) for the purpose of hydroelectric power generation as its Osage Powerplant. It is 2,543 feet (775 m) long, including a 520-foot (160 m) long spillway and a 511-foot (156 m) long power station. The facility with eight generators has a maximum capacity of 215 megawatts.
The dam derives its name from Bagnell, Missouri at the dam site which preceded the dam. It in turn derives its name from William Bagnell, who platted the town in 1883. A variant name is the "Osage Dam".
The dam is located in the city of Lakeside in Miller County, near the Camden-Miller County line.
Construction started on the dam in 1929 and was completed in 1931. The resulting reservoir, the Lake of the Ozarks, has a surface area of 55,000 acres (22,000 ha), over 1,150 miles (1,850 km) of shoreline (1850 km), and stretches 94 miles (151 km) from end to end. At the time of construction it was one of the largest man-made lakes in the world and the largest in the United States.
The concept of a hydro electric power plant on the Osage River was first introduced by a Kansas City developer as long ago as 1912. Ralph Street managed to put together the funding to construct a dam across the Osage River and began building roads, railroads and support structures necessary to begin construction of a dam that would impound a much smaller lake than what is now known as Lake of the Ozarks. Sometime in the mid-1920s, Street’s funding dried up and he had to abandon the idea of the first hydroelectric power plant on the Osage River.
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