Fort Gibson Dam

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Fort Gibson Dam
USACE Fort Gibson Lake and Dam.jpg
Fort Gibson dam seen from above
Fort Gibson Dam is located in Oklahoma
Fort Gibson Dam
Location of Fort Gibson Dam
Country United States
Location Wagoner / 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; -95.230436Coordinates: 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(s) 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 cu ft (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 sq mi (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 Fort Gibson. The purpose of the dam is flood control and hydroelectric power production. It 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.[4] The dam and power rights originally belonged to the Grand River Dam Authority but were seized by the U.S. Army Corps of Engineers in 1946.[5]

Salient features[edit]

Dam[edit]

Dam
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)
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[edit]

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[edit]

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[edit]

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)

Contractors[edit]

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[edit]

  1. ^ "American Governor Company Awarded U.S. Army Corps of Engineers Fort Gibson Modernization Project". American Governor Compan. Retrieved 25 October 2011. 
  2. ^ "Economic Appendix". Arkansas River Navigation Study. pp. B–14. Retrieved 25 October 2011. 
  3. ^ "Guide Book XII". Oklahoma Geological Survey. p. 9. Retrieved 25 October 2011. 
  4. ^ "Fort Gibson Lake". U.S. Army Corps of Engineers. Retrieved 25 October 2011. 
  5. ^ 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.