Oknoname 113121 Reservoir Report
Nearby: Oknoname 113118 Oknoname 113122
Last Updated: December 14, 2025
Oknoname 113121, located in Osage, Oklahoma, is a privately owned dam regulated by the Oklahoma Water Resources Board.
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Summary
Built in 1940, this earth dam stands at a height of 30 feet, with a hydraulic height of 25 feet and a length of 180 feet. It has a storage capacity of 240 acre-feet and a normal storage level of 18 acre-feet. The dam, which sits on the TR-SAND CR river, has a controlled spillway with a width of 1 foot and is equipped with a single valve outlet gate.
Despite being classified as having a low hazard potential, Oknoname 113121 has been assessed as having a very high risk due to its age and condition. The dam has not been rated for its current condition, and its last inspection was conducted in 2011 with a recommended inspection frequency of 5 years. Emergency action plans and risk management measures for the dam are not currently in place, raising concerns about the safety and resilience of the structure in the face of potential climate-related challenges.
With its strategic location in Pawhuska, Oklahoma, Oknoname 113121 serves as a critical water resource for the surrounding area. As climate change continues to impact water availability and quality, it is essential for stakeholders to prioritize the maintenance and regulation of dams like Oknoname 113121 to ensure the long-term sustainability of water resources in the region.
Year Completed |
1940 |
Dam Length |
180 |
Dam Height |
30 |
River Or Stream |
TR-SAND CR |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
25 |
Nid Storage |
240 |
Structural Height |
30 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
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 113121