Shawver John Reservoir Report
Nearby: William Leck Arthur White
Last Updated: December 15, 2025
Shawver John is a privately owned earth dam located in Union City, Oklahoma, with a primary purpose of recreation.
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Summary
Completed in 1965, this dam is regulated by the Oklahoma Water Resources Board and undergoes regular inspections, with a low hazard potential and a very high risk assessment rating. The dam has a height of 26 feet and a length of 475 feet, providing a storage capacity of 130 acre-feet.
Situated on Lumpmouth Creek, Shawver John offers a surface area of 4 acres for recreational activities such as boating, fishing, and wildlife observation. The dam features a controlled spillway with a width of 1 foot and a valve outlet gate for water release. The surrounding area is monitored for any potential risks, with emergency plans in place to ensure the safety of nearby residents in the event of a dam failure.
Overall, Shawver John serves as a vital water resource for the community, while also providing a space for outdoor enjoyment. With its well-maintained structure and adherence to regulatory standards, this dam continues to be a valuable asset for both water management and recreational purposes in the region.
Year Completed |
1965 |
Dam Length |
475 |
Dam Height |
26 |
River Or Stream |
TR-LUMPMOUTH CR |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
26 |
Nid Storage |
130 |
Structural Height |
26 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
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.
Shawver John