Scs-Okfuskee Tributaries Site-N04 Reservoir Report
Last Updated: December 16, 2025
The SCS-Okfuskee Tributaries Site-N04 in Okmulgee, Oklahoma, is a state-regulated earth dam constructed in 1976 by the USDA NRCS with a primary purpose of flood risk reduction along the Brier Creek.
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Summary
This dam stands at a height of 27 feet and has a length of 1600 feet, providing a maximum storage capacity of 770 acre-feet and normal storage of 82 acre-feet. The dam has a controlled spillway and is equipped with a single valve outlet gate for water release.
Despite being assessed as having a low hazard potential, the dam's risk assessment has been rated as very high due to its location and potential impact in case of failure. The condition of the dam is currently not rated, and the last inspection was conducted in 1980 with a scheduled inspection frequency of 5 years. While emergency action plans, risk management measures, and inundation maps are not currently prepared or updated, the dam remains under state jurisdiction and regulation by the Oklahoma Water Resources Board, ensuring ongoing monitoring and enforcement of safety protocols.
With its strategic placement in the Tulsa District and close oversight by state regulatory agencies, the SCS-Okfuskee Tributaries Site-N04 serves as a crucial infrastructure for flood risk management in the region. Climate and water resource enthusiasts can appreciate the engineering and operational details of this dam, as well as the ongoing efforts to maintain its safety and functionality for the protection of surrounding communities and the environment.
Year Completed |
1976 |
Dam Length |
1600 |
Dam Height |
27 |
River Or Stream |
BRIER CR |
Primary Dam Type |
Earth |
Surface Area |
23 |
Hydraulic Height |
27 |
Nid Storage |
770 |
Structural Height |
27 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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-N04