Koehn Reservoir Report
Last Updated: December 16, 2025
Koehn is a privately owned dam located in Ringwood, Oklahoma, on the TR-INDIAN CR river.
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Summary
Constructed in 1960, this earth dam stands at a height of 25 feet and has a storage capacity of 125 acre-feet. The dam serves a primary purpose of "Other" and is regulated by the Oklahoma Water Resources Board (OWRB), with state permitting, inspection, and enforcement in place.
With a low hazard potential and a very high risk assessment rating, Koehn is considered to be in good condition, though not officially rated. The dam features a controlled spillway and a single valve for outlet gates. It has a surface area of 2 acres and a normal storage capacity of 65 acre-feet. Despite its small size, Koehn plays a crucial role in managing water resources in the area.
Although Koehn has not been inspected since August 2009, the dam is scheduled for regular inspections every 5 years. With its strategic location in Major County, Oklahoma, Koehn remains an essential structure for water resource management and climate resilience in the region.
Year Completed |
1960 |
Dam Length |
200 |
Dam Height |
25 |
River Or Stream |
TR-INDIAN CR |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
20 |
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
Skeleton Creek At Enid
|
7cfs |
Salt Fork Arkansas River Nr Alva
|
88cfs |
Cimarron River Near Dover
|
300cfs |
Cimarron River Near Waynoka
|
107cfs |
North Canadian River Near Seiling
|
103cfs |
Skeleton Creek Near Lovell
|
26cfs |
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.
Koehn