Richardson C.B. Reservoir Report

Last Updated: December 6, 2025

Richardson C.B., a privately owned dam located in Pumpkin Center, Oklahoma, was completed in 1970 and stands at a height of 16 feet with a hydraulic height of 13 feet.


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Summary

The dam, constructed primarily with earth and stone materials, serves a primary purpose of "Other" and has a storage capacity of 74 acre-feet. It is regulated and inspected by the Oklahoma Water Resources Board, with a low hazard potential and a very high risk assessment rating of 1.

Situated on TR Armstrong Creek in Stephens County, Richardson C.B. spans 500 feet in length and covers a surface area of 4 acres. It features a controlled spillway with a width of 1 foot and is equipped with a single valve outlet gate. Although the dam has not been rated for its condition, it undergoes inspections every 5 years, with the last one conducted in August 2011. Despite its low hazard potential, the dam is classified as having a very high risk, emphasizing the importance of ongoing risk management measures.

While Richardson C.B. currently does not have an Emergency Action Plan (EAP) in place, it meets state regulatory requirements for permitting, inspection, and enforcement. With its location in a high-risk area, it is essential for stakeholders and authorities to prioritize the implementation of safety measures and preparedness protocols to mitigate potential risks and safeguard the surrounding community and environment from the impacts of a dam failure.

Year Completed

1970

Dam Length

500

Dam Height

16

River Or Stream

TR ARMSTRONG CREEK

Primary Dam Type

Earth

Surface Area

4

Hydraulic Height

13

Nid Storage

74

Structural Height

16

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

16
       
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.