Johnson Reservoir Report
Nearby: Hopkins Debock No.1
Last Updated: December 5, 2025
Johnson is a privately owned earth dam located in Quinlan, Oklahoma, along the West Creek.
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Summary
Designed by the USDA NRCS, this structure stands at a height of 29 feet and has a storage capacity of 52 acre-feet. While it is categorized as having a low hazard potential and a moderate risk assessment, its condition has not been rated, indicating a need for further evaluation.
Despite being owned privately, Johnson does not fall under state jurisdiction or regulation, with no state permitting, inspection, or enforcement in place. It is interesting to note that the dam is not associated with any federal agencies for funding, construction, or oversight. With a spillway type classified as uncontrolled and no outlet gates or locks, this structure presents unique challenges in terms of operational control and management.
For water resource and climate enthusiasts, Johnson serves as a case study in the complexities of dam ownership and regulation. As an example of a privately owned structure with limited state and federal involvement, it highlights the importance of ongoing assessment and maintenance to ensure safety and functionality. Further research and scrutiny are needed to fully understand the implications of its risk assessment and condition status.
Dam Height |
29 |
River Or Stream |
WEST CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
29 |
Nid Storage |
52 |
Hazard Potential |
Low |
Nid Height |
29 |
Seasonal Comparison
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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.
Johnson