Stafford & Jennings Reservoir Report

Last Updated: December 7, 2025

Stafford & Jennings is a privately owned dam located in Seminole, Oklahoma, specifically in the city of Wewoka.


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Summary

Completed in 1977, this earth dam stands at a height of 20 feet and has a hydraulic height of 18 feet, with a total length of 150 feet. The dam's primary purpose is classified as "Other," and it serves as a crucial structure for managing water resources in the area.

The dam, situated along Long George Creek, has a normal storage capacity of 90 acre-feet and a maximum storage of 150 acre-feet, with a surface area of 10 acres. It features a controlled spillway type, with a width of 1 foot, and is equipped with a single valve outlet gate for water release. While the dam has a low hazard potential, it is considered to have a very high risk assessment level, indicating the need for vigilant monitoring and management to ensure the safety and stability of the structure.

Managed by the Oklahoma Water Resources Board (OWRB) and under state regulation, Stafford & Jennings is subject to regular inspections every five years. Despite being deemed in "Not Rated" condition, the dam's risk profile suggests the importance of implementing risk management measures to mitigate potential hazards and ensure the continued functionality of this vital water resource infrastructure in the region.

Year Completed

1977

Dam Length

150

Dam Height

20

River Or Stream

LONG GEORGE CREEK

Primary Dam Type

Earth

Surface Area

10

Hydraulic Height

18

Nid Storage

150

Structural Height

20

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

20
       
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.