Fort Gibson Dam - Dike 11 Reservoir Report
Last Updated: January 12, 2026
Fort Gibson Dam - Dike 11, located in Fort Gibson, Oklahoma, is a federal-owned structure managed by the US Army Corps of Engineers.
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Summary
Completed in 1949, this gravity dam stands at 110 feet tall and spans 2990 feet across the Grand River, serving primarily for flood risk reduction purposes. With a storage capacity of 1,284,400 acre-feet and a maximum discharge of 986,000 cubic feet per second, the dam plays a crucial role in managing water levels and preventing flood damage downstream.
Despite its high hazard potential, Fort Gibson Dam is equipped with a controlled spillway and emergency action plan to mitigate risks and ensure public safety. The US Army Corps of Engineers regularly inspects and maintains the dam, collaborating with local emergency managers to enhance preparedness and response capabilities in case of a dam-related emergency. By implementing risk management measures and monitoring the dam's condition, the USACE aims to minimize the impact of severe weather events and maintain the structural integrity of the dam for the surrounding community.
As an essential component of water resource management in Oklahoma, Fort Gibson Dam - Dike 11 underscores the importance of proactive risk assessment and effective emergency planning to safeguard against potential flooding threats. With ongoing efforts to address flood risks and engage stakeholders in emergency preparedness, the US Army Corps of Engineers remains committed to ensuring the resilience and functionality of this critical infrastructure.
Year Completed |
1949 |
Dam Length |
2990 |
Dam Height |
110 |
River Or Stream |
GRAND RIVER |
Primary Dam Type |
Gravity |
Surface Area |
19900 |
Hydraulic Height |
99 |
Drainage Area |
12494 |
Nid Storage |
1284400 |
Structural Height |
110 |
Hazard Potential |
High |
Nid Height |
110 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Arkansas River Near Muskogee
|
4710cfs |
Neosho River Near Chouteau
|
1160cfs |
Arkansas River Near Haskell
|
2770cfs |
Illinois River Near Tahlequah
|
423cfs |
Baron Fork At Eldon
|
62cfs |
Haikey Creek At 101st St South At Tulsa
|
2cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
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