Chelsea Reservoir No. 2 Reservoir Report
Last Updated: December 9, 2025
Chelsea Reservoir No.
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Summary
2, located in Chelsea, Oklahoma, is a key water supply source for the area. Constructed in 1955, this earth dam stands at a height of 35 feet and has a storage capacity of 320 acre-feet. With a maximum discharge capacity of 4900 cubic feet per second, this reservoir serves as a vital resource for the community, ensuring reliable water supply for residents and businesses.
Managed by the local government, Chelsea Reservoir No. 2 is regulated by the Oklahoma Water Resources Board. Despite its low hazard potential, the reservoir is classified as having a very high risk due to its critical role in water supply. With a controlled spillway and a valve outlet gate, the structure has been inspected regularly to ensure its safety and functionality, with the last inspection conducted in May 2011.
Situated along the TR-PRYOR CR river/stream, Chelsea Reservoir No. 2 covers a surface area of 28 acres and plays a crucial role in water management in Rogers County, Oklahoma. As water resource and climate enthusiasts, recognizing the significance of this reservoir in providing sustainable water supply solutions is essential for promoting resilient water infrastructure and addressing the challenges posed by a changing climate.
Year Completed |
1955 |
Dam Length |
800 |
Dam Height |
35 |
River Or Stream |
TR-PRYOR CR |
Primary Dam Type |
Earth |
Surface Area |
28 |
Hydraulic Height |
30 |
Nid Storage |
320 |
Structural Height |
35 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big Cabin Creek Near Big Cabin
|
51cfs |
Verdigris River Near Claremore
|
1770cfs |
Caney River Near Ramona
|
59cfs |
Verdigris River Near Lenapah
|
804cfs |
Neosho River Near Langley
|
919cfs |
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.
Chelsea Reservoir No. 2