Heath John Reservoir Report
Last Updated: December 6, 2025
Heath John is a privately owned Earth dam located in Wetumka, Oklahoma, along the TR.
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Summary
Greasy Creek. Constructed in 1977 by the USDA NRCS, this dam stands at 25 feet high with a storage capacity of 125 acre-feet. With a controlled spillway and a maximum discharge of 600 cubic feet per second, the dam serves a primary purpose of "Other" and is regulated by the Oklahoma Water Resources Board.
Despite being classified as having a low hazard potential, Heath John poses a very high risk due to its location and structural characteristics. The dam, made of stone core and soil foundation, has not been rated for its condition as of the last inspection in 2011. The dam is equipped with one valve outlet gate and is subject to inspections every 5 years to ensure its safety and functionality in case of emergencies.
In the event of a dam failure, the surrounding area could face significant inundation risks, highlighting the importance of proper risk management measures and emergency preparedness. As an essential component of water resource infrastructure in Hughes County, Oklahoma, Heath John serves as a vital asset for regulating water flow and storage in the region, emphasizing the need for continued monitoring and maintenance to mitigate potential risks associated with its operation.
Year Completed |
1977 |
Dam Length |
300 |
Dam Height |
25 |
River Or Stream |
TR.GREASY CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
22 |
Nid Storage |
125 |
Structural Height |
25 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
North Canadian River Near Wetumka
|
209cfs |
Canadian River At Calvin
|
361cfs |
Little River Near Sasakwa
|
12cfs |
Deep Fork Near Beggs
|
141cfs |
North Canadian River At Shawnee
|
177cfs |
Little River Near Tecumseh
|
8cfs |
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.
Heath John