Oknoname 111082 Reservoir Report
Last Updated: December 5, 2025
Oknoname 111082, located in Okmulgee, Oklahoma, is a privately owned dam on TR-NEGRO CREEK with a state-regulated status.
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Summary
Completed in 1960, this Earth-type dam stands at 26 feet tall and spans 3380 feet in length, providing a storage capacity of 50 acre-feet. With a controlled spillway and a low hazard potential, this dam has not been rated for its condition assessment, but has a very high risk assessment rating.
Managed by the Oklahoma Water Resources Board, Oknoname 111082 serves a primary purpose classified as 'Other'. The dam features a stone core and soil foundation, with a single valve outlet gate for water control. Despite its age, the dam has undergone inspection every 5 years, with the last recorded inspection dating back to August 2011. While the dam's emergency action plan status and risk management measures are not specified, its risk assessment remains high, emphasizing the importance of ongoing monitoring and maintenance to ensure public safety and water resource sustainability in the area.
Year Completed |
1960 |
Dam Length |
3380 |
Dam Height |
26 |
River Or Stream |
TR-NEGRO CREEK |
Primary Dam Type |
Earth |
Surface Area |
1 |
Hydraulic Height |
26 |
Nid Storage |
50 |
Structural Height |
26 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
Seasonal Comparison
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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 111082