Garrett H.M. Reservoir Report

Last Updated: December 6, 2025

Garrett H.M.


°F

°F

mph

Wind

%

Humidity

Summary

is a private dam located in Oil City, Oklahoma, along the TR Little Beaver Creek. Built in 1975, this Earth-type structure stands at a height of 23 feet with a hydraulic height of 20 feet. With a normal storage capacity of 30 acre-feet, this dam serves a primary purpose classified as "Other" and has a low hazard potential rating. Despite being state-regulated and inspected, the condition assessment of Garrett H.M. remains unrated as of the last inspection in 2011.

While the dam poses a low hazard potential, it is crucial to note that the risk assessment for Garrett H.M. is classified as "Very High (1)." The dam's proximity to residential areas and critical infrastructure raises concerns about potential risks associated with its operation and maintenance. Despite the risk management measures not being specified in the data, it is important for water resource and climate enthusiasts to monitor the condition and regulatory compliance of Garrett H.M. to ensure the safety of downstream communities and the surrounding environment.

Overall, Garrett H.M. serves as a significant water resource structure in Stephens County, Oklahoma, contributing to the local water supply and flood control efforts. As enthusiasts in the field of water resources and climate, it is essential to stay informed about the condition, risk assessment, and regulatory oversight of dams like Garrett H.M. to ensure their continued safe operation and protection of downstream areas.

Year Completed

1975

Dam Length

310

Dam Height

23

River Or Stream

TR LITTLE BEAVER CREEK

Primary Dam Type

Earth

Surface Area

1

Hydraulic Height

20

Nid Storage

61

Structural Height

23

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

23
       
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.