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Fort Gibson Dam

Coordinates: 35°52′11″N 95°13′50″W / 35.869665°N 95.230436°W / 35.869665; -95.230436
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Fort Gibson Dam
Fort Gibson dam seen from above
Fort Gibson Dam is located in Oklahoma
Fort Gibson Dam
Location of Fort Gibson Dam in Oklahoma
CountryUnited States
LocationWagoner / Cherokee counties near Fort Gibson and Okay, Oklahoma, US
Coordinates35°52′11″N 95°13′50″W / 35.869665°N 95.230436°W / 35.869665; -95.230436
StatusIn Use
Construction began1941
Opening date1949
Construction cost$22,000,000
Owner(s)U.S. Army Corps of Engineers
Dam and spillways
Type of damConcrete Gravity
ImpoundsNeosho River
Height110 ft (34 m)
Length2,850 ft (869 m)
Spillway typeTainter gate
Spillway capacity986,000 cu ft (27,920 m3)
CreatesFort Gibson Lake
Total capacity1,292,000 acre⋅ft (2 km3)
Active capacity1,287,000 acre⋅ft (2 km3)
Catchment area12,615 sq mi (32,673 km2)
Power Station
Commission date1953
Turbines4 x 11.25 MW[1] Francis-type[2]
Installed capacity48 MW[3]
Annual generation208,482,000 KWh

The Fort Gibson Dam is a gravity dam on the Grand (Neosho) River in Oklahoma, 5.4 mi (9 km) north of the town of Fort Gibson. The dam forms Fort Gibson Lake. The primary purposes of the dam and lake are flood control and hydroelectric power production, although supply of drinking water to local communities, as well as recreation, are additional benefits.[4] The project was authorized by the Flood Control Act of 1941 and construction began the next year. During World War II construction was suspended and it recommenced in May 1946. In June 1949, the river was closed and the entire project was complete in September 1953 with the operation of the last of the power plant's four generators.[5] Rights to construct the project originally belonged to the Grand River Dam Authority, but were seized by the U.S. Army Corps of Engineers in 1946.[6]

Salient features

Release of floodwater in 2015


Type Concrete gravity
Average Height 90 ft (27 m)
Crest length 2,850 ft (869 m)
Concrete 461,300 cu yd (352,689 m3)
Reinforcing steel 2,655,000 lb (1,204,288 kg)
Miscellaneous metal works and castings 300,000 lb (136,078 kg)
Tainter gates 3,120,000 lb (1,415,208 kg)
Tainter gate anchorages 901,000 lb (408,687 kg)
Emergency gate guides 160,000 lb (72,575 kg)
Number 3
Type Rolled earth filled topped by surfaced service roadway
Height 18 ft (5 m) (max)
Length (Total all dikes) 8,500 ft (2,591 m)
Width (At top) 16 ft (5 m)
Elevations (above sea level)
Top of dam 593 ft (181 m)
Top of gates 582 ft (177 m)
Spillway crest 547 ft (167 m)
Top of power pool 554 ft (169 m)
Flood control pool 582 ft (177 m)


Type Gate-controlled concrete gravity ogee-weir with stilling basin
Gates 30 (40 feet by 35 feet tainter)
Length 1,490 ft (454 m)
Capacity - Pool at top of gates 915,000 cu ft/s (25,910 m3/s)
Capacity - Maximum pool 915,000 cu ft/s (25,910 m3/s)
Capacity - Power pool 69,000 cu ft/s (1,954 m3/s)

Outlet works

Outlet works
Number of sluices 10
Size of sluices 5 feet 8 inches by 7 feet
Capacity - Pool at top of gates 20,800 cu ft/s (589 m3/s)
Capacity - Power pool 16,500 cu ft/s (467 m3/s)
Capacity - Pool at WEIR crest 15,300 cu ft/s (433 m3/s)


Reservoir Capacities
Pool - at top of gates 1,287,000 acre-feet (1.587×109 m3)
Pool- at maximum stage 1,292,000 acre-feet (1.594×109 m3)
Top of power pool 365,000 acre-feet (450,000,000 m3)
Drainage area 12,615 sq mi (32,673 km2)




First Contract: Al Johnson construction co. Winston brothers co. peter kiewit sons co. 608 Foshay Tower. Minneapolis, Minnesota

Second Contract: W. R. Grimshaw company. - Tulsa, Oklahoma


  1. ^ "American Governor Company Awarded U.S. Army Corps of Engineers Fort Gibson Modernization Project" (PDF). American Governor Company. Archived from the original (PDF) on 25 April 2012. Retrieved 25 October 2011.
  2. ^ "Economic Appendix". Arkansas River Navigation Study. pp. B-14. Retrieved 25 October 2011.
  3. ^ "Guide Book XII" (PDF). Oklahoma Geological Survey. p. 9. Retrieved 25 October 2011.
  4. ^ "Fort Gibson Lake". U.S. Army Corps of Engineers. Retrieved October 19, 2019.
  5. ^ "Fort Gibson Lake". Retrieved 6 December 2014.
  6. ^ Dilsaver, ed. by Lary M.; Colten, Craig E. (1992). The American environment : interpretations of past geographies. Lanham, Md.: Rowman and Littlefield Publishers. p. 185. ISBN 0-8476-7754-0. {{cite book}}: |first= has generic name (help)
  7. ^ "Fort Gibson Dam and reservoir". 7 September 2011.