Lowe No. 1 Reservoir Report

Last Updated: December 5, 2025

Lowe No.


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Summary

1 is a privately owned earth dam located on Wolf Creek in Sheridan, Wyoming. Built in 1954 for irrigation purposes, the dam stands at a height of 21 feet with a structural height of 25 feet and a length of 225 feet. Its primary source agency is the state of Wyoming, and it is regulated, inspected, and permitted by the state regulatory agency SEO.

Despite its low hazard potential, Lowe No. 1 is in poor condition as of the last inspection in August 2021. The dam has a moderate risk assessment rating, indicating potential vulnerabilities that need to be addressed. The spillway is uncontrolled with a width of 20 feet, and there is one valve for outlet gates. The dam's emergency action plan status and risk management measures are not specified in the data.

For water resource and climate enthusiasts, Lowe No. 1 serves as an example of the importance of maintaining and monitoring infrastructure to ensure the safety and efficiency of water management systems. With its historical significance and ongoing role in irrigation, the dam represents a connection to the region's agricultural past and present. The data highlights the need for continued attention to the condition and risk assessment of dams like Lowe No. 1 to protect communities and ecosystems dependent on water resources.

Year Completed

1954

Dam Length

225

Dam Height

21

River Or Stream

WOLF CREEK

Primary Dam Type

Earth

Surface Area

3

Hydraulic Height

20

Nid Storage

21

Structural Height

25

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

25
       
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.