Hirsig No. 1 Reservoir Report
Nearby: Hirsig No. 2 Hirsig No. 3
Last Updated: December 5, 2025
Hirsig No.
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Summary
1 is a privately owned dam located in Hawk Springs, Wyoming, along the North Bear Creek. Built in 1954 for irrigation purposes, this earth dam stands at a height of 28 feet with a hydraulic height of 23 feet. The dam has a storage capacity of 80 acre-feet, with a normal storage level of 47 acre-feet and a surface area of 6 acres.
Despite its low hazard potential, Hirsig No. 1 is rated as having poor condition as of the last inspection in August 2019. The dam features an uncontrolled spillway with a width of 50 feet and one outlet valve. The risk assessment for this structure is moderate, indicating a need for ongoing monitoring and maintenance to ensure its safety and functionality for the surrounding community.
With its historical significance and essential role in supporting local agriculture through irrigation, Hirsig No. 1 serves as a vital water resource in the region. However, the dam's condition assessment highlights the importance of regular inspections and risk management measures to mitigate potential hazards and safeguard this valuable infrastructure for future generations.
Year Completed |
1954 |
Dam Length |
245 |
Dam Height |
28 |
River Or Stream |
NORTH BEAR CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
23 |
Nid Storage |
80 |
Structural Height |
28 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
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.
Hirsig No. 1