Scs-Lower Clear Boggy Creek Site-21 Reservoir Report
Last Updated: December 6, 2025
SCS-Lower Clear Boggy Creek Site-21, located in Atoka, Oklahoma, is a state-regulated earth dam designed by USDA NRCS for flood risk reduction along the TR-ROCK CREEK.
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Summary
Completed in 1977, this dam stands at a height of 29 feet with a hydraulic height of 25 feet, serving a primary purpose of flood risk reduction. With a storage capacity of 836 acre-feet and a normal storage level of 86 acre-feet, this controlled spillway dam has a maximum discharge capacity of 3,466 cubic feet per second.
Despite being rated as low hazard potential and not currently assessed for condition, the dam at Site-21 presents a very high risk due to its age and lack of recent inspection data. The emergency action plan status and risk management measures for this dam are currently unknown, suggesting potential vulnerabilities in the event of a major flooding event. The dam is owned by the state of Oklahoma and falls under the jurisdiction of the OWRB, with routine inspection and enforcement measures in place.
For water resource and climate enthusiasts, SCS-Lower Clear Boggy Creek Site-21 offers a fascinating case study in dam infrastructure and flood risk management. With its strategic location in Atoka, Oklahoma, and its critical role in flood risk reduction along TR-ROCK CREEK, this earth dam serves as a vital piece of water infrastructure in the region. However, the lack of recent inspection data and assessment of condition underscore the importance of ongoing monitoring and maintenance to ensure the safety and resilience of this essential water resource asset.
Year Completed |
1977 |
Dam Length |
1800 |
Dam Height |
29 |
River Or Stream |
TR-ROCK CREEK |
Primary Dam Type |
Earth |
Surface Area |
29 |
Hydraulic Height |
25 |
Nid Storage |
836 |
Structural Height |
29 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Clear Boggy Creek Near Caney
|
423cfs |
Blue River Near Connerville
|
54cfs |
Pennington Creek Near Reagan
|
7cfs |
Muddy Boggy Creek Near Farris
|
9cfs |
Blue River Near Blue
|
58cfs |
Washita River Near Dickson
|
317cfs |
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-Lower Clear Boggy Creek Site-21