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Fort Gibson Dam

Fort Gibson Dam
Fort Gibson dam seen from above
Fort Gibson Dam Location of Fort Gibson Dam in Oklahoma
Country	United States
Location	Wagoner and Cherokee counties near Fort Gibson and Okay, Oklahoma, US
Coordinates	35°52′11″N 95°13′50″W / 35.869665°N 95.230436°W / 35.869665; -95.230436
Status	In Use
Construction began	1941
Opening date	1949
Construction cost	$22,000,000
Owner	U.S. Army Corps of Engineers
Dam and spillways
Type of dam	Concrete Gravity
Impounds	Neosho River
Height	110 ft (34 m)
Length	2,850 ft (869 m)
Spillways	30
Spillway type	Tainter gate
Spillway capacity	986,000 ft³ (27,920 m³)
Reservoir
Creates	Fort Gibson Lake
Total capacity	1,292,000 acre⋅ft (2 km³)
Active capacity	1,287,000 acre⋅ft (2 km³)
Catchment area	12,615 mi² (32,673 km²)
Power Station
Commission date	1953
Turbines	4 x 11.25 MW^[1] Francis-type^[2]
Installed capacity	48 MW^[3]
Annual generation	208,482,000 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

Dam

Dam
Type	Concrete gravity
Average Height	90 ft (27 m)
Crest length	2,850 ft (869 m)
Concrete	461,300 yd³ (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)

Dikes
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)

Spillway

Spillway
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

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 mi² (32,673 km²)

^[7]

Contractors

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

References

Wikimedia Commons has media related to Fort Gibson Dam.

↑ "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.
↑ "Economic Appendix". Arkansas River Navigation Study. pp. B-14. Retrieved 25 October 2011.
↑ "Guide Book XII" (PDF). Oklahoma Geological Survey. p. 9. Retrieved 25 October 2011.
↑ "Fort Gibson Lake". U.S. Army Corps of Engineers. Retrieved October 19, 2019.
↑ "Fort Gibson Lake". Retrieved 6 December 2014.
↑ 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)
↑ "Fort Gibson Dam and reservoir". 7 September 2011.