Oknoname 111055 Reservoir Report
Nearby: Oknoname 111068 Oknoname 111069
Last Updated: December 21, 2025
Oknoname 111055 is a privately owned earth dam located in Okmulgee, Oklahoma, near the city of Henryetta.
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Summary
Built in 1940, this dam on TR-COAL CREEK stands at 40 feet tall and stretches 3320 feet in length. With a storage capacity of 50 acre-feet, it serves a primary purpose of "Other" and is regulated by the Oklahoma Water Resources Board.
Despite being classified as having a low hazard potential, the dam is considered to have a very high risk due to its condition assessment being marked as "Not Rated". The last inspection was conducted in August 2011, with an inspection frequency of every 5 years. The dam features a controlled spillway with a width of 1 foot and one outlet valve.
With its unique characteristics and location in a high-risk area, Oknoname 111055 serves as a crucial aspect of water resource management in Oklahoma. Enthusiasts of water resources and climate will find this structure intriguing due to its historical significance and potential impact on the surrounding environment.
Year Completed |
1940 |
Dam Length |
3320 |
Dam Height |
40 |
River Or Stream |
TR-COAL CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
40 |
Nid Storage |
50 |
Structural Height |
40 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
40 |
Seasonal Comparison
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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.
Oknoname 111055