Hagerman Reservoir Report
Nearby: Arrowhead Enlargement Of The Shallow
Last Updated: December 5, 2025
Hagerman Dam, located in Hulett, Wyoming, serves as a crucial irrigation source along Arch Creek.
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Summary
Constructed in 1942, this private-owned earth dam stands at a height of 20 feet with a hydraulic height of 15 feet. With a storage capacity of 737 acre-feet, Hagerman Dam primarily supports irrigation purposes, with a normal storage level of 420 acre-feet and a surface area of 55 acres.
Despite its low hazard potential and fair condition assessment, Hagerman Dam undergoes regular inspections every five years to ensure its structural integrity and safety. With a spillway width of 50 feet and an uncontrolled spillway type, the dam is equipped with a single valve outlet gate for water release. While the risk assessment for the dam is moderate, there is currently no emergency action plan in place, raising the importance of preparedness and risk management measures for potential incidents.
As a vital water resource infrastructure in Crook County, Hagerman Dam plays a significant role in supporting agricultural activities in the region. With its historical significance dating back to the early 20th century, the dam continues to contribute to the local economy and water management efforts. As water resource and climate enthusiasts, it is essential to monitor and maintain the safety of dams like Hagerman to ensure sustainable water usage and environmental conservation in the face of changing climate conditions.
Year Completed |
1942 |
Dam Length |
1020 |
Dam Height |
20 |
River Or Stream |
ARCH CREEK |
Primary Dam Type |
Earth |
Surface Area |
55 |
Hydraulic Height |
15 |
Nid Storage |
737 |
Structural Height |
20 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
20 |
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.
Hagerman