Scs-Mill Creek Site-17 Reservoir Report
Last Updated: December 19, 2025
SCS-Mill Creek Site-17, located in Johnston, Oklahoma, is a state-regulated dam designed by USDA NRCS with a primary purpose of flood risk reduction.
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Summary
Completed in 1969, this earth dam stands at a height of 33 feet and has a normal storage capacity of 71 acre-feet. The dam is situated on TR-Three Mile Creek and is under the jurisdiction of the Oklahoma Water Resources Board.
With a low hazard potential and a very high risk assessment rating, SCS-Mill Creek Site-17 plays a critical role in mitigating flood risks in the area. The dam features a controlled spillway, valve outlet gates, and stone core types for structural integrity. Despite not being inspected since 1980, the dam remains in a not-rated condition, signaling the need for periodic assessments to ensure its continued effectiveness in managing water resources and climate challenges in the region.
Overall, SCS-Mill Creek Site-17 serves as a vital infrastructure for flood risk reduction in Johnston, Oklahoma, with its strategic location, design elements, and storage capacity. As climate change impacts intensify, ensuring the proper maintenance and inspection of this dam will be crucial in safeguarding the surrounding communities and ecosystems from potential water-related disasters.
Year Completed |
1969 |
Dam Length |
900 |
Dam Height |
33 |
River Or Stream |
TR-THREE MILE CR |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
18 |
Nid Storage |
347 |
Structural Height |
33 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Pennington Creek Near Reagan
|
9cfs |
Rock Creek At Sulphur
|
8cfs |
Blue River Near Connerville
|
44cfs |
Washita River Near Dickson
|
317cfs |
Washita River Near Pauls Valley
|
329cfs |
Clear Boggy Creek Near Caney
|
423cfs |
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.
Bukhorn Campground Loop A
Goddard Youth Camp
Buckhorn Campground Loop B
Buckhorn - Chickasaw National Rec Area
camping 16-25$
Buckhorn Campground Loop C
Scs-Mill Creek Site-17