Coffey Reservoir Report
Nearby: Oknoname 107022 Spring
Last Updated: December 8, 2025
Coffey Lake, located in Okfuskee County, Oklahoma, is a privately owned dam that serves primarily for recreational purposes.
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Summary
Built in 1950, this earth dam stands at a height of 30 feet and has a storage capacity of 320 acre-feet. The dam is regulated by the Oklahoma Water Resources Board and undergoes regular inspections to ensure its safety and compliance with state regulations.
Situated on TR-Little Walnut Creek, Coffey Lake has a controlled spillway with a width of 1 foot and a maximum discharge capacity of 500 cubic feet per second. Despite being classified as a low hazard potential structure, the risk assessment for Coffey Lake ranks it as very high (1), indicating the need for ongoing risk management measures. The dam has one outlet gate and is equipped with a valve for controlled water release.
Overall, Coffey Lake is an important water resource in the region, providing recreational opportunities while also facing potential risks that require careful monitoring and management to ensure the safety of the surrounding community and environment. With its picturesque location and functional design, Coffey Lake is a valuable asset that contributes to both the local economy and the conservation of water resources in the area.
Year Completed |
1950 |
Dam Length |
180 |
Dam Height |
30 |
River Or Stream |
TR-LITTLE WALNUT CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
30 |
Nid Storage |
320 |
Structural Height |
30 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
North Canadian River Near Wetumka
|
200cfs |
Deep Fork Near Beggs
|
128cfs |
North Canadian River At Shawnee
|
166cfs |
Deep Fork At Warwick
|
23cfs |
Little River Near Tecumseh
|
7cfs |
Little River Near Sasakwa
|
15cfs |
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.
Coffey