Summary
Built in 1970 by the USDA NRCS, this earth dam stands at 20 feet high with a hydraulic height of 15 feet and a length of 300 feet. With a storage capacity of 150 acre-feet, Johnson serves various purposes and is regulated by the Oklahoma Water Resources Board. The dam's spillway type is controlled, with a spillway width of 1 foot, and it has one outlet valve for water release.
Despite its low hazard potential, Johnson poses a very high risk, according to assessments. The dam has not been inspected since August 2009, with an inspection frequency of 5 years. While its condition is currently not rated, the dam's emergency action plan status is unknown. The risk management measures and inundation maps for Johnson have not been prepared, highlighting the need for updated safety protocols and monitoring to ensure the community's safety and water resource sustainability.
Year Completed |
1970 |
Dam Length |
300 |
Dam Height |
20 |
River Or Stream |
TR-WEST CR |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
150 |
Structural Height |
20 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cimarron River Near Waynoka
|
141cfs |
North Canadian River At Woodward
|
69cfs |
North Canadian River Near Seiling
|
105cfs |
Salt Fork Arkansas River Nr Alva
|
103cfs |
Cimarron River Near Buffalo
|
88cfs |
Medicine Lodge R Nr Kiowa
|
113cfs |
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