Sprowles No 2 Reservoir Report
Last Updated: December 11, 2025
Sprowles No 2 is a privately owned dam located in Roger Mills, Oklahoma, with a primary purpose listed as "Other." Completed in 1965, this Earth-type structure stands at a height of 27 feet and spans a length of 450 feet, providing a storage capacity of 50 acre-feet.
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Summary
Situated on the TR-BEAVERDAM CR river or stream, this dam is regulated by the Oklahoma Water Resources Board (OWRB) and undergoes regular inspections, with a low hazard potential but a very high risk assessment rating of 1.
Despite its low hazard potential, Sprowles No 2 is carefully monitored and maintained, with a controlled spillway and a single valve outlet gate for water flow control. The dam has not been modified in recent years and is currently in "Not Rated" condition, indicating a lack of recent assessment. The surrounding area is at risk for inundation, with no emergency action plan (EAP) currently in place, raising concerns about the potential consequences of a breach or failure of the dam.
For water resource and climate enthusiasts, Sprowles No 2 presents an intriguing case study in dam management and risk assessment. With its unique design features and regulatory oversight by the OWRB, this privately owned structure serves as a crucial component of the local water infrastructure. Continued monitoring and maintenance will be essential to ensure the safety and longevity of Sprowles No 2, particularly in light of the high-risk assessment and lack of an updated emergency action plan.
Year Completed |
1965 |
Dam Length |
450 |
Dam Height |
27 |
River Or Stream |
TR-BEAVERDAM CR |
Primary Dam Type |
Earth |
Hydraulic Height |
27 |
Nid Storage |
50 |
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.
Sprowles No 2