Green Cabin Reservoir Report

Last Updated: December 5, 2025

Green Cabin is a privately-owned dam located in Clearmont, Wyoming, along the Green Cabin Draw.


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Summary

Built in 1969, the dam serves multiple purposes including fire protection, stock watering, and creating a small fish pond. With a dam height of 30 feet and a storage capacity of 89 acre-feet, the structure provides essential resources for the surrounding area.

Despite its age, Green Cabin dam is in fair condition with a low hazard potential and moderate risk assessment. Inspected in July 2017, the dam has been deemed structurally sound and meets regulatory standards for operation and maintenance. With a history of serving the community for over 50 years, Green Cabin continues to be a vital water resource for the region.

Located in Sheridan County, Wyoming, Green Cabin dam is a key feature in the local landscape, offering both practical utility and aesthetic appeal. As climate change impacts water availability and quality, the maintenance and monitoring of structures like Green Cabin will be crucial in ensuring sustainable water management for future generations of water resource and climate enthusiasts.

Year Completed

1969

Dam Length

320

Dam Height

30

River Or Stream

GREEN CABIN DRAW

Primary Dam Type

Earth

Surface Area

6

Hydraulic Height

26

Nid Storage

89

Structural Height

33

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

33
       
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.