Trail Unit Evapaoration Facilty Reservoir Report

Last Updated: December 5, 2025

Located in Sweetwater, Wyoming, the Trail Unit Evaporation Facility is a private water resource infrastructure designed by David G.


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Summary

Weston. Completed in 2014, this Earth-type dam stands at 19 feet high and spans 2890 feet in length, with a storage capacity of 100 acre-feet. Primarily serving purposes beyond typical dam functions, this facility plays a crucial role in water management and climate adaptation in the region.

Regulated by the Wyoming State Engineer's Office, the Trail Unit Evaporation Facility is inspected every five years, with a low hazard potential and fair condition assessment as of November 2019. With no associated structures and a surface area of 5 acres, this facility operates with no outlet gates and has a spillway width of 0. Despite its modest size, this facility contributes significantly to water conservation efforts in the area, particularly in managing surface water resources for agricultural and environmental purposes.

Amidst the challenges posed by climate change and water scarcity, the Trail Unit Evaporation Facility stands as a testament to innovative solutions in water resource management. With its capacity to store and evaporate water efficiently, this facility not only supports local water needs but also contributes to broader efforts in climate resilience and adaptation. As climate enthusiasts and water resource professionals continue to explore sustainable solutions, facilities like the Trail Unit serve as vital components in building a more resilient and water-secure future.

Year Completed

2014

Dam Length

2890

Dam Height

19

River Or Stream

TRIB. JENSEN DRAW

Primary Dam Type

Earth

Surface Area

5

Hydraulic Height

17

Nid Storage

100

Structural Height

19

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

19
       
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.