Basin Reservoir Reservoir Report

Last Updated: December 5, 2025

Basin Reservoir, located in Sublette, Wyoming, is a federal-owned water supply reservoir with a primary purpose of providing water to the surrounding area.


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Summary

The dam, primarily made of earth and stone, stands at a height of 28 feet and has a storage capacity of 53 acre-feet. While the reservoir has a low hazard potential and is currently in fair condition, it is regularly inspected and regulated by the State of Wyoming to ensure its safety and functionality.

The reservoir, situated on Airy Basin, is under the jurisdiction of the Sacramento District of the US Army Corps of Engineers. It features an uncontrolled spillway with a width of 25 feet and is equipped with emergency action plans to address any potential risks. Despite its moderate risk assessment, Basin Reservoir remains a vital water resource for the region and plays a crucial role in water supply management. With its strategic location and sustainable design, it serves as a key asset for water resource and climate enthusiasts interested in the conservation and utilization of water resources in Wyoming.

Dam Length

690

Dam Height

28

River Or Stream

AIRY BASIN

Primary Dam Type

Earth

Hydraulic Height

28

Nid Storage

53

Structural Height

28

Hazard Potential

Low

Foundations

Soil

Nid Height

28
       
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.