Mishler Dr Donald Reservoir Report

Last Updated: December 5, 2025

Mishler Dr Donald is a private dam located in Okmulgee, Oklahoma, specifically in the city of Hectorville.


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Summary

The dam, completed in 1965, stands at a height of 21 feet and has a storage capacity of 210 acre-feet. It serves as a structure for controlling the flow of the TR-MIDDLE DUCK CREEK river or stream, with a maximum discharge capacity of 470 cubic feet per second.

Managed by the Oklahoma Water Resources Board, Mishler Dr Donald is classified as a low hazard potential dam with a very high risk assessment rating of 1. Despite its age, the dam has not received a condition assessment and is currently not rated. The last inspection was conducted in August 2011, with an inspection frequency of 5 years. The dam features a controlled spillway and a single valve outlet gate for water release.

For water resource and climate enthusiasts, Mishler Dr Donald presents an intriguing case study of a privately owned earth dam that plays a crucial role in managing water flow in the region. Its location in a rural area with limited infrastructure highlights the importance of regular inspections and risk management measures to ensure the safety and functionality of the structure. Further research and monitoring of Mishler Dr Donald could provide valuable insights into the intersection of water resource management and climate resilience in the face of potential hazards.

Year Completed

1965

Dam Length

990

Dam Height

21

River Or Stream

TR-MIDDLE DUCK CREEK

Primary Dam Type

Earth

Surface Area

11

Hydraulic Height

21

Nid Storage

210

Structural Height

21

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

21
       
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.