Scs-Okfuskee Tributaries Site-N09 Reservoir Report
Last Updated: December 16, 2025
Located in Okfuskee County, Oklahoma, the SCS-Okfuskee Tributaries Site-N09 is a state-regulated earth dam that was completed in 1978 by the USDA NRCS.
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Summary
With a primary purpose of flood risk reduction, this dam on the TR-NUYAKA CREEK has a height of 35 feet and a length of 2420 feet, providing storage for up to 1320 acre-feet of water. The dam is equipped with a controlled spillway and a valve outlet gate to manage water flow during times of high discharge.
Despite being assessed as in fair condition, the SCS-Okfuskee Tributaries Site-N09 poses a significant hazard potential due to its location and design. The dam is regularly inspected every 3 years, with the last inspection conducted in October 2011. In the event of an emergency, the dam does not have an Emergency Action Plan (EAP) prepared, raising concerns about response readiness. With a very high risk assessment rating, there is a need for improved risk management measures to enhance the safety and resilience of this critical water resource infrastructure in Oklahoma.
Year Completed |
1978 |
Dam Length |
2420 |
Dam Height |
35 |
River Or Stream |
TR-NUYAKA CREEK |
Primary Dam Type |
Earth |
Surface Area |
35 |
Hydraulic Height |
35 |
Nid Storage |
1320 |
Structural Height |
35 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Deep Fork Near Beggs
|
104cfs |
North Canadian River Near Wetumka
|
183cfs |
North Canadian River At Shawnee
|
397cfs |
Canadian River At Calvin
|
350cfs |
Arkansas River Near Haskell
|
5500cfs |
Little Haikey Creek At 101st St South At Tulsa
|
0cfs |
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.
Scs-Okfuskee Tributaries Site-N09