Thomas No. 2 Reservoir Report
Nearby: Thomas No. 1 Watt Brothers No. 1
Last Updated: December 5, 2025
Thomas No.
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Summary
2 is a privately owned earth dam located in Hulett, Wyoming along the Thomas Draw river. Built in 1948 for irrigation purposes, this dam stands at a height of 23 feet and has a storage capacity of 145 acre-feet. Despite its low hazard potential, the dam is currently in poor condition as per the last inspection in September 2017, with a moderate risk assessment score of 3.
With a spillway width of 50 feet and no outlet gates, Thomas No. 2 poses a limited risk to downstream areas in case of a breach or overflow. However, the dam's condition assessment and risk management measures need to be improved to ensure the safety of surrounding communities and the integrity of the structure. As a part of the State of Wyoming's regulatory jurisdiction, ongoing inspections and enforcement efforts are crucial to mitigate any potential hazards associated with this aging dam.
Year Completed |
1948 |
Dam Length |
495 |
Dam Height |
23 |
River Or Stream |
THOMAS DRAW |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
21 |
Nid Storage |
145 |
Structural Height |
23 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
23 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Thomas No. 2