Underwood C.L. Reservoir Report

Last Updated: December 5, 2025

Located in Cotton, Oklahoma, Underwood C.L.


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Summary

is a privately owned structure that plays a crucial role in water resource management in the area. Built in 1940, this earth-type dam stands at a height of 15 feet and spans a length of 325 feet. It is situated on TR Rabbit Creek and has a maximum storage capacity of 51 acre-feet, with a normal storage level of 30 acre-feet.

The dam's primary purpose is listed as 'Other', with a low hazard potential and a very high risk assessment rating. Despite being privately owned, Underwood C.L. is regulated and inspected by the Oklahoma Water Resources Board (OWRB), ensuring that it meets safety standards and environmental regulations. The dam features a controlled spillway and a single valve outlet gate for water release.

Although the condition of Underwood C.L. is currently rated as 'Not Rated', it undergoes regular inspections every five years to assess its structural integrity and overall safety. The dam's risk management measures and emergency preparedness plans are not specified in the available data, highlighting the importance of ongoing monitoring and maintenance to mitigate potential risks and ensure the continued functionality of this vital water resource infrastructure.

Year Completed

1940

Dam Length

325

Dam Height

15

River Or Stream

TR RABBIT CREEK

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

7

Nid Storage

51

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.