The Fort Gibson Dam is a gravity dam on the Grand (Neosho) River

Neosho River

The Neosho River is a tributary of the Arkansas River in eastern Kansas and northeastern Oklahoma in the United States. Its tributaries also drain portions of Missouri and Arkansas. The river is about long. Via the Arkansas, it is part of the Mississippi River watershed.- Course :The Neosho's...

 in Oklahoma, 5.4 mi (9 km) north of Fort Gibson

Fort Gibson

Fort Gibson, now located in Oklahoma and designated Fort Gibson Historical Site, guarded the American frontier in Indian Territory from 1824 until 1890...

. The purpose of the dam is flood control and hydroelectric power production. It was authorized by the Flood Control Act of 1941

Flood Control Act of 1941

The Flood Control Act of 1941 was an Act of the United States Congress signed into law by President Franklin Delano Roosevelt that authorized civil engineering projects such as dams, levees, dikes, and other flood control measures through the United States Army Corps of Engineers and other Federal...

 and construction began the next year. During World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

 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. The dam and power rights originally belonged to the Grand River Dam Authority

Grand River Dam Authority

The Grand River Dam Authority is an Oklahoma agency created to control, develop, and maintain the Grand River waterway. It was created by the Oklahoma state legislature in 1935, and is headquartered in Vinita, Oklahoma. It operates three hydroelectric facilities and two reservoirs, Grand Lake...

 but were seized by the U.S. Army Corps of Engineers in 1946.

Dam

Dam
Type	Concrete gravity
Average Height	90 ft (27 m)
Crest length	2850 ft (869 m)
Concrete	461300 cu yd (352,689 m³)
Reinforcing steel	2655000 lb (1,204,288 kg)
Miscellaneous metal works and castings	300000 lb (136,078 kg)
Tainter gates	3120000 lb (1,415,208 kg)
Tainter gate anchorages	901000 lb (408,687 kg)
Emergency gate guides	160000 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)	8500 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	1490 ft (454 m)
Capacity - Pool at top of gates	915000 ft3/s
Capacity - Maximum pool	915000 ft3/s
Capacity - Power pool	69000 ft3/s

Outlet works

Outlet works Outlet works A set of outlet works is a device used to release and regulate water flow from a dam. Such devices usually consist of one or more pipes or tunnels through the embankment of the dam, directing water usually under high pressure to the river downstream...
Number of sluices	10
Size of sluices	5 feet 8 inches by 7 feet
Capacity - Pool at top of gates	20800 ft3/s
Capacity - Power pool	16500 ft3/s
Capacity - Pool at WEIR crest	15300 ft3/s

Reservoir

Reservoir Capacities
Pool - at top of gates	1287000 acre.ft
Pool- at maximum stage	1292000 acre.ft
Top of power pool	365000 acre.ft
Drainage area	12615 mi2

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