Mitchell Harlan H. Reservoir Report

Last Updated: December 6, 2025

Mitchell Harlan H.


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Summary

is a private earth dam located in Coxs Corner, Oklahoma, along the TR-Beaver Creek. Completed in 1955, this dam stands at a height of 17 feet and has a length of 450 feet, providing a storage capacity of 70 acre-feet. With a controlled spillway and a maximum discharge of 2500 cubic feet per second, this dam serves a primary purpose of "Other" and is regulated by the Oklahoma Water Resources Board.

Despite its low hazard potential, Mitchell Harlan H. is classified as having a very high risk due to its location and design. The dam has not been rated for its condition assessment, and the last inspection was conducted in September 2010 with a frequency of every 5 years. The dam is equipped with a single valve outlet gate and is not associated with any other structures. The risk management measures and emergency action plan status for this dam are currently unknown.

Water resource and climate enthusiasts would find Mitchell Harlan H. to be an intriguing case study, given its historical significance and potential risk factors. The dam's location in Comanche County, Oklahoma, and its impact on the surrounding environment make it a subject of interest for those interested in sustainable water management practices. Further research and monitoring of Mitchell Harlan H. could provide valuable insights into the resilience and maintenance of aging dams in the face of changing climate conditions.

Year Completed

1955

Dam Length

450

Dam Height

17

River Or Stream

TR-BEAVER CR

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

17

Nid Storage

70

Structural Height

17

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

17
       
Seasonal Comparison

Weather Forecast

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.