Inola Reservoir Report
Nearby: Pond # 1 Peterson S
Last Updated: December 5, 2025
Inola, also known as Inola Lake, is a local government-owned water supply dam located in Rogers County, Oklahoma.
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Summary
The dam, completed in 1950, stands at a height of 22 feet and has a hydraulic height of 18 feet. It serves the primary purpose of providing water supply, with a storage capacity of 500 acre-feet and a normal storage level of 466 acre-feet. The dam has a surface area of 71 acres and is regulated by the Oklahoma Water Resources Board (OWRB).
The Inola dam is classified as an Earth dam with a Stone core and Soil foundation. It features a controlled spillway with a width of 2 feet and an outlet gate consisting of a single valve. Despite being rated as having a low hazard potential, it is considered to have a very high risk level in terms of its overall condition. The dam has not been assessed for its current condition and its Emergency Action Plan (EAP) status is unclear. The last inspection of the dam was conducted in May 2011 with an inspection frequency of every 5 years.
For water resource and climate enthusiasts, Inola presents an intriguing case study in dam infrastructure management and risk assessment. Its location along the Inola Creek and its role in providing water supply to the surrounding area highlight the importance of maintaining and monitoring such structures. The dam's design, construction, and regulatory oversight by the OWRB offer valuable insights into the challenges and considerations involved in ensuring the safety and reliability of water resource infrastructure in the face of changing environmental conditions.
Year Completed |
1950 |
Dam Length |
1500 |
Dam Height |
22 |
River Or Stream |
INOLA CR |
Primary Dam Type |
Earth |
Surface Area |
71 |
Hydraulic Height |
18 |
Nid Storage |
500 |
Structural Height |
22 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
22 |
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.
Inola