Orendorf Ch Jr Reservoir Report

Last Updated: December 5, 2025

Orendorf Ch Jr is a privately owned earth dam located in Hanson, Oklahoma, within Sequoyah County.


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Summary

Built in 1930, this structure stands at a height of 15 feet and has a maximum storage capacity of 50 acre-feet. The dam, which spans 450 feet in length, serves as a crucial element for water resource management in the area, particularly for the TR-WOLF CREEK river or stream.

Managed by the Oklahoma Water Resources Board, Orendorf Ch Jr has a controlled spillway and is equipped with a single valve outlet gate. Despite its low hazard potential and current "Not Rated" condition assessment, the dam presents a very high risk due to its age and potential vulnerabilities. Regular inspections are carried out every 5 years to ensure the structural integrity and safety of the dam, with the last inspection conducted in December 2010.

For water resource and climate enthusiasts, Orendorf Ch Jr provides a fascinating case study on the importance of maintaining aging infrastructure for effective water management. With its historical significance and critical role in the local ecosystem, this dam serves as a reminder of the ongoing challenges faced in balancing water resource needs with environmental and safety considerations in the face of climate change and evolving regulatory standards.

Year Completed

1930

Dam Length

450

Dam Height

15

River Or Stream

TR-WOLF CREEK

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

10

Nid Storage

50

Structural Height

12

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

15
       
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.