Scs-Pryor Creek Site-20 Reservoir Report
Last Updated: December 11, 2025
SCS-Pryor Creek Site-20, located in Chelsea, Oklahoma, is a state-regulated earth dam constructed in 1976 by the USDA NRCS with a primary purpose of flood risk reduction along the TR-Pryor Creek.
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Summary
The dam stands at a height of 25 feet and has a hydraulic height of 23 feet, with a length of 1380 feet and a storage capacity of 182 acre-feet. Despite being classified as having a low hazard potential, the dam poses a very high risk due to its location and structural characteristics.
Managed by the Oklahoma Water Resources Board (OWRB), the dam features a controlled spillway and a single valve outlet gate for water release. The dam is designated for inspection every 5 years, with the last inspection conducted in 1980. The risk assessment for SCS-Pryor Creek Site-20 places it at a very high level (1), highlighting the critical importance of monitoring and maintenance to ensure the safety and integrity of the structure for flood control and water resource management in the area.
With the surrounding area being prone to flooding and with a high risk assessment, ongoing monitoring and management of SCS-Pryor Creek Site-20 are crucial to mitigate potential risks and safeguard the local community and environment. As a key infrastructure for flood risk reduction, the dam serves as a critical component of the water resource and climate resilience efforts in Rogers County, Oklahoma, underscoring the need for proactive measures to address any potential vulnerabilities and ensure the long-term effectiveness of the structure in protecting against flooding events.
Year Completed |
1976 |
Dam Length |
1380 |
Dam Height |
25 |
River Or Stream |
TR-PRYOR CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
23 |
Nid Storage |
182 |
Structural Height |
25 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big Cabin Creek Near Big Cabin
|
47cfs |
Verdigris River Near Lenapah
|
796cfs |
Neosho River Near Langley
|
919cfs |
Caney River Near Ramona
|
59cfs |
Verdigris River Near Claremore
|
358cfs |
Neosho River Near Chouteau
|
358cfs |
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-Pryor Creek Site-20