Bagnell dam - wikipedia Bagnell dam Bagnell Dam Bagnell Dam Country United States Location Missouri Coordinates 38 ° 12 ′ 08 '' N 92 ° 37 ′ 37 '' W ﻿ / ﻿ 38.20222 ° N 92.62694 ° W ﻿ / 38.20222 ; - 92.62694 Coordinates : 38 ° 12 ′ 08 '' N 92 ° 37 ′ 37 '' W ﻿ / ﻿ 38.20222 ° N 92.62694 ° W ﻿ / 38.20222 ; - 92.62694 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 km ) Active capacity 468,000 acre ⋅ ft ( 0.577 km ) Catchment area 13,944 sq mi ( 36,110 km ) 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 Installed capacity 176.0 MW 220 MW ( overload ) Annual generation 957,340,000 KWh Bagnell Dam and Osage Power Plant U.S. National Register of Historic Places Location 617 River Rd., Lakeside, Missouri 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. Contents 1 Etymology 2 Geography 3 History 4 Floodgates 5 Taum Sauk pumped storage plant 6 References 7 External links Etymology 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 ''. Geography Bagnell Dam The dam is located in the city of Lakeside in Miller County, near the Camden - Miller County line. History 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. Its construction virtually ended commercial traffic on the upper river. The concept of a hydro - electric power plant on the Osage River was first introduced by a Kansas City developer as early as 1912. Ralph Street managed to put together the funding to construct a dam across the Osage River. He began building roads, railroads, and the 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. Union Electric Power and Light stepped in with engineering firm Stone & Webster from Boston, Massachusetts. It designed and constructed Bagnell Dam in one of the most unlikely spots along the Osage River. Many thought the $30 million project would be a disaster after the stock market crash of 1929, but it was completed. Employment during the lengthy construction proved to be a boost to many families in the area, as well as the hundreds of workers attracted from other areas of the country. By early21st - century standards, all construction was done by hand, and the equipment used in the construction was quite primitive. The construction of Bagnell Dam was completed and Lake of the Ozarks was a full reservoir in fewer than two years. The stock market crash of 1929, which precipitated the Great Depression, occurred just months after construction began on Bagnell Dam. The project employed thousands of laborers, providing a large economic boost to the rural area around the dam and to the state as a whole at a time when jobs were scarce. The associated Union Electric Administration Building - Lakeside was constructed in 1930. This building was added to the National Register of Historic Places in 1998, with a boundary increase of associated property in 2011. Floodgates Construction of the dam allowed for thirteen floodgates, as called for in the original design. Only twelve floodgates were installed, and the thirteenth spillway opening is walled shut with concrete. The engineers calculated that twelve floodgates provided a large enough margin of safety. Taum Sauk pumped storage plant AmerenUE remotely operates the Taum Sauk pumped storage plant from its control room at Bagnell Dam. References ^ Jump up to : `` Bagnell Dam Facts and Figures ''. The Lake Area History Pages. Retrieved 2016 - 02 - 24. Jump up ^ `` Hydrology ''. Missouri Department of Conservation. Retrieved 2016 - 02 - 24. ^ Jump up to : `` Bagnell Dam and Osage Power Plant : Osage Power Plant Station '' ( PDF ). Historic American Engineering Record. U.S. Library of Congress. Retrieved 2016 - 02 - 24. Jump up ^ `` Osage ( 2106 ) ''. Carbon Monitoring for Action. Retrieved 2016 - 02 - 24. ^ Jump up to : National Park Service ( 2010 - 07 - 09 ). `` National Register Information System ''. National Register of Historic Places. National Park Service. Jump up ^ The Story Of Bagnell Jump up ^ U.S. Geological Survey Geographic Names Information System : Bagnell Dam Jump up ^ Lake of the Ozarks, Missouri, the premier vacation spot in the Midwest Jump up ^ `` National Register of Historic Places Listings ''. Weekly List of Actions Taken on Properties : 6 / 20 / 11 through 6 / 24 / 11. National Park Service. 2011 - 07 - 01. `` Osage Power Plant ''. Ameren. Archived from the original on 23 February 2005. Retrieved February 25, 2005. `` Watershed, Niangua River, Hydrology Chapter ''. Missouri Department of Conservation 's Missouri 's Rivers and Their Watersheads Homepage. Archived from the original on 17 March 2005. Retrieved February 25, 2005. `` Bagnell Dam ''. Geographic Names Information System. United States Geological Survey. Retrieved 2006 - 05 - 12. `` Osage Dam ''. Geographic Names Information System. United States Geological Survey. Retrieved 2006 - 05 - 12. Map of Bagnell Dam area External links Missouri portal Water portal Renewable energy portal Bagnell Dam Facts and Photos U.S. National Register of Historic Places in Missouri Lists by county Adair Andrew Atchison Audrain Barry Barton Bates Benton Bollinger Boone Buchanan Butler Caldwell Callaway Camden Cape Girardeau Carroll Carter Cass Cedar Chariton Christian Clark Clay Clinton Cole Cooper Crawford Dade Dallas Daviess DeKalb Dent Douglas Dunklin Franklin Gasconade Gentry Greene Grundy Harrison Henry Hickory Holt Howard Howell Iron Jackson : Downtown Kansas City Jackson : Kansas City other Jackson : Other Jasper Jefferson Johnson Knox Laclede Lafayette Lawrence Lewis Lincoln Linn Livingston Macon Madison Maries Marion McDonald Mercer Miller Mississippi Moniteau Monroe Montgomery Morgan New Madrid Newton Nodaway Oregon Osage Ozark Pemiscot Perry Pettis Phelps Pike Platte Polk Pulaski Putnam Ralls Randolph Ray Reynolds Ripley St. Charles St. Clair St. Francois St. Louis ( city ) : Downtown and Downtown West St. Louis ( city ) : Northwest St. Louis ( city ) : Southwest St. Louis County Ste. Genevieve Saline Schuyler Scotland Scott Shannon Shelby Stoddard Stone Sullivan Taney Texas Vernon Warren Washington Wayne Webster Worth Wright Other lists Bridges National Historic Landmarks Keeper of the Register History of the National Register of Historic Places Property types Historic district Contributing property Retrieved from `` https://en.wikipedia.org/w/index.php?title=Bagnell_Dam&oldid=836071371 '' Categories : Dams in Missouri United States power company dams Hydroelectric power plants in Missouri Dams on the National Register of Historic Places in Missouri Lake of the Ozarks Dams completed in 1931 Energy infrastructure completed in 1931 Buildings and structures in Miller County, Missouri National Register of Historic Places in Miller County, Missouri Talk Contents About Wikipedia Cebuano Dansk Norsk Edit links This page was last edited on 12 April 2018, at 14 : 35. About Wikipedia

Question: when was the lake of the ozarks dam built
Answer: 1931