Boatman An Reservoir Report
Nearby: Oknoname 111086 Oknoname 111085
Last Updated: December 28, 2025
Boatman An is a privately owned earth dam located in Okmulgee, Oklahoma, along the TR-Flat Rock Creek.
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Summary
Designed by the USDA NRCS and completed in 1950, this dam stands at 50 feet in height and has a storage capacity of 290 acre-feet. The dam is primarily used for purposes other than flood control or water supply, and is regulated by the Oklahoma Water Resources Board. With a low hazard potential and a very high risk assessment rating, it is important to ensure that proper risk management measures are in place for the safety of the surrounding community.
Although Boatman An has not been rated for its condition assessment, it is inspected every five years to ensure its structural integrity. The dam features a controlled spillway and a single valve outlet gate. While the dam is currently in a satisfactory condition, it is crucial for the owners and regulators to stay vigilant in monitoring its maintenance and addressing any potential risks. With a maximum discharge capacity of 1620 cubic feet per second, it is essential to have emergency action plans in place and to regularly update and review them to meet safety guidelines and ensure the protection of downstream areas in the event of a breach or failure.
Year Completed |
1950 |
Dam Length |
550 |
Dam Height |
50 |
River Or Stream |
TR-FLAT ROCK CREEK |
Primary Dam Type |
Earth |
Surface Area |
1 |
Hydraulic Height |
50 |
Nid Storage |
290 |
Structural Height |
50 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
50 |
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.
Boatman An