Scs-Cotton-Coon-Mission Cr Site-004 Reservoir Report

Last Updated: December 12, 2025

SCS-Cotton-Coon-Mission Cr Site-004, located in Osage County, Oklahoma, is a state-regulated earth dam designed by the USDA NRCS for flood risk reduction along Opossum Creek.


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Summary

Completed in 1977, this dam stands at a height of 40 feet and has a hydraulic height of 37 feet, with a storage capacity of 732 acre-feet. The dam is primarily controlled by a valve outlet gate and has a spillway width of 1 foot.

With a low hazard potential and a risk assessment rating of very high, this dam site is equipped with emergency action plans and regular inspections to ensure safety and compliance with state regulations. Despite its age, the condition assessment remains unrated as of the last inspection in 1980. The surrounding area of Bartlesville benefits from the flood risk reduction measures implemented by this dam, reflecting the collaborative efforts of state and federal agencies in water resource management in Oklahoma.

Year Completed

1977

Dam Length

780

Dam Height

40

River Or Stream

OPOSSUM CREEK

Primary Dam Type

Earth

Surface Area

18

Hydraulic Height

37

Nid Storage

732

Structural Height

40

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

40
       
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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.