Oknoname 133003 Reservoir Report
Last Updated: December 18, 2025
Oknoname 133003 is a privately owned earth dam located in Konawa, Oklahoma, along the TR-Negro Creek.
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Summary
Built in 1950, this structure stands at a height of 35 feet and has a length of 620 feet, providing a storage capacity of 133 acre-feet. The dam serves a primary purpose of "Other" and is regulated by the Oklahoma Water Resources Board, with state permitting, inspection, and enforcement in place to ensure its safety and compliance.
Despite its low hazard potential, Oknoname 133003 is classified as a very high risk structure due to its high-risk characteristics. The dam features a controlled spillway with a width of 1 foot and is equipped with a valve outlet gate. While the condition assessment is currently listed as "Not Rated," the last inspection took place in December 2010, with a scheduled inspection frequency of every 5 years. Although no Emergency Action Plan (EAP) information is available, the dam's risk management measures and inundation maps preparedness status are not specified, indicating potential areas for further evaluation and improvement.
Overall, Oknoname 133003 presents an intriguing case study for water resource and climate enthusiasts, showcasing the complexities of managing private dams in Oklahoma. With a unique combination of historical significance and modern regulatory oversight, this earth dam serves as a focal point for understanding the intersection of human infrastructure, environmental stewardship, and risk management in the face of changing climatic conditions.
Year Completed |
1950 |
Dam Length |
620 |
Dam Height |
35 |
River Or Stream |
TR-NEGRO CREEK |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
35 |
Nid Storage |
133 |
Structural Height |
35 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
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 133003