Oknoname 30073 Reservoir Report
Nearby: Ownbey Miller W.N.
Last Updated: December 19, 2025
Oknoname 30073, located in Harper, Oklahoma, is a privately owned dam designed by USDA NRCS and regulated by the Oklahoma Water Resources Board.
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Summary
Completed in 2000, this earth dam stands at a height of 26.5 feet and has a storage capacity of 95 acre-feet. Situated on an unnamed tributary of Buffalo Creek, this structure serves multiple purposes and has a low hazard potential.
Despite being categorized as low risk, Oknoname 30073 has a very high risk assessment score of 1. With a controlled spillway and a single valve outlet gate, this dam has not been rated for its condition assessment. The last inspection date was in August 2011, with an inspection frequency of 5 years. While emergency action plans and inundation maps are not prepared, the dam meets regulatory guidelines and is monitored for enforcement, inspection, and permitting by the state agency.
Overall, Oknoname 30073 is a crucial water resource structure in Oklahoma, providing storage for 50 acre-feet of water and covering a surface area of 6.8 acres. Despite its low hazard potential, the dam's risk assessment highlights the need for continued monitoring and management to ensure the safety and effectiveness of this essential infrastructure in the face of climate challenges.
Year Completed |
2000 |
Dam Length |
315 |
Dam Height |
26.5 |
River Or Stream |
UNNAMED TRIB BUFFALO CR. |
Primary Dam Type |
Earth |
Surface Area |
6.8 |
Hydraulic Height |
26.5 |
Drainage Area |
920 |
Nid Storage |
95 |
Structural Height |
26.5 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cimarron R Near Buttermilk
|
46cfs |
Bluff Creek Nr Buttermilk
|
41cfs |
Crooked C Nr Englewood
|
7cfs |
Cimarron River Near Buffalo
|
73cfs |
Beaver River At Beaver
|
0cfs |
Cimarron River Near Forgan
|
19cfs |
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.
Oknoname 30073