Sledge Olen Reservoir Report

Last Updated: December 8, 2025

Sledge Olen is a privately owned dam located in Harrisburg, Stephens County, Oklahoma.


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Summary

Completed in 1975, this earth dam stands at a height of 22 feet and serves a variety of purposes, with a primary purpose listed as "Other". The dam has a storage capacity of 51 acre-feet, with a normal storage level of 39 acre-feet. It is regulated by the Oklahoma Water Resources Board and undergoes regular inspections for safety and compliance.

The dam is situated on TR East Mud Creek, with a controlled spillway and a low hazard potential. Despite being classified as "Very High (1)" risk in terms of climate-related challenges, Sledge Olen has not been rated for its condition assessment. The dam features a stone core with a soil foundation, and is equipped with a single valve outlet gate for water release. Although there have been no recent modifications or assessments, the dam continues to be monitored for any potential risks and management measures.

With a designated inspection frequency of 5 years, Sledge Olen remains a key structure in the region's water resource infrastructure. Managed by private owners and regulated by the state, this dam plays a crucial role in flood control and water storage along TR East Mud Creek, highlighting the importance of maintaining and monitoring such critical infrastructure in the face of evolving climate challenges.

Year Completed

1975

Dam Length

400

Dam Height

22

River Or Stream

TR EAST MUD CREEK

Primary Dam Type

Earth

Hydraulic Height

17

Nid Storage

51

Structural Height

22

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

22
       
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.