Cooper Gp #6 Reservoir Report
Nearby: Cooper Gp #8 Cooper #23
Last Updated: December 21, 2025
Cooper Gp #6 is a privately owned earth dam located in Harper, Oklahoma, near the city of FORT SUPPLY.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1960 by the USDA NRCS, this dam stands at a height of 26 feet and stretches 255 feet in length. With a storage capacity of 32 acre-feet and a drainage area of 1.08 square miles, Cooper Gp #6 serves as a crucial water resource for the region.
Despite being classified as a low hazard potential structure with a moderate risk assessment, Cooper Gp #6 has not been rated for its condition assessment. The dam features an uncontrolled spillway with a width of 41 feet, designed to handle potential overflow events. While no emergency action plan is currently in place, the dam meets regulatory guidelines and is inspected regularly to ensure its safety and functionality.
The Cooper Gp #6 dam plays a vital role in managing water resources in the area, providing irrigation and flood control benefits. With its strategic location and design, this structure exemplifies the importance of maintaining and monitoring dams to mitigate risks and safeguard communities in the face of changing climate conditions.
Year Completed |
1960 |
Dam Length |
255 |
Dam Height |
26 |
Surface Area |
2 |
Hydraulic Height |
26 |
Drainage Area |
1.08 |
Nid Storage |
32 |
Hazard Potential |
Low |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
North Canadian River At Woodward
|
59cfs |
Cimarron River Near Buffalo
|
75cfs |
Cimarron R Near Buttermilk
|
43cfs |
Bluff Creek Nr Buttermilk
|
43cfs |
Cimarron River Near Waynoka
|
133cfs |
North Canadian River Near Seiling
|
101cfs |
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.
Cooper Gp #6