Scs-Cow Creek Site-25a Reservoir Report

Last Updated: December 6, 2025

SCS-Cow Creek Site-25a is a state-regulated earth dam located in Comanche, Oklahoma, designed by the USDA NRCS with a primary purpose of flood risk reduction.


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Summary

Completed in 1990, this dam stands at 30 feet in height and stretches 1600 feet in length, offering a maximum storage capacity of 740 acre-feet and a normal storage of 88 acre-feet. With a hazard potential rated as high and a condition assessment marked as fair, this dam plays a crucial role in mitigating flood risks in the region.

Situated along the Cow Creek, this dam features a controlled spillway with a width of 1 foot and one slide (sluice gate) outlet gate. The dam's drainage area covers 1.1 square miles, with a maximum discharge capacity of 4703 cubic feet per second. Despite its fair condition, the dam poses a very high risk, prompting the need for continuous monitoring and maintenance to ensure its effectiveness in flood risk reduction. With its strategic location and vital role in water resource management, SCS-Cow Creek Site-25a serves as a key infrastructure in safeguarding the community against potential flooding events.

Year Completed

1990

Dam Length

1600

Dam Height

30

River Or Stream

COW CREEK

Primary Dam Type

Earth

Surface Area

13

Hydraulic Height

30

Drainage Area

1.1

Nid Storage

740

Structural Height

30

Outlet Gates

Slide (sluice gate) - 1

Hazard Potential

High

Foundations

Soil

Nid Height

30
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.