Sprowles No 1 Reservoir Report
Nearby: Sprowls Robert N Sprowles No 3
Last Updated: December 11, 2025
Sprowles No 1, located in Roger Mills, Oklahoma, is a privately owned Earth dam completed in 1964 with a primary purpose of 'Other'.
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Summary
It stands at a height of 26 feet and has a maximum storage capacity of 51 acre-feet. The dam, situated on the TR-BEAVERDAM CR river or stream, is regulated by the Oklahoma Water Resources Board (OWRB) with state permitting, inspection, and enforcement in place to ensure its safety and compliance.
With a low hazard potential and a very high risk assessment rating, Sprowles No 1 has a controlled spillway type with a width of 1 foot and one valve outlet gate. The dam has not been rated for its condition assessment, but it undergoes inspections every 5 years, with the last inspection conducted in November 2010. Although the dam is not owned or funded by any federal agency, it falls under the jurisdiction of the Tulsa District and is within Representative Frank D. Lucas's congressional district.
Water resource and climate enthusiasts would find Sprowles No 1 to be an intriguing structure, given its unique design and the regulatory measures in place to monitor its safety and integrity. The dam's location in the picturesque city of HERRING, with its surrounding natural beauty and vital role in water management, adds to its significance in the region. As a privately owned dam with state oversight, Sprowles No 1 serves as a crucial component of the local water infrastructure, contributing to the preservation and conservation of water resources in Oklahoma.
Year Completed |
1964 |
Dam Length |
240 |
Dam Height |
26 |
River Or Stream |
TR-BEAVERDAM CR |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
51 |
Structural Height |
26 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
Seasonal Comparison
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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 1