Willow Springs Reservoir Report
Nearby: Pine Creek Mary No. 1
Last Updated: December 5, 2025
Willow Springs, located in Alcova, Wyoming, is a privately owned earth dam constructed in 1940 by designer Loren E.
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Summary
Bishop. The dam stands at a height of 19 feet and serves primarily as a water supply structure for the surrounding area. Willow Springs is regulated by the State of Wyoming and is subject to regular inspections, enforcement, and permitting to ensure its safety and compliance with state regulations.
Despite its low hazard potential, Willow Springs is rated as having poor condition as of the last inspection in July 2018. The dam has a normal storage capacity of 105 acre-feet and a maximum storage of 193 acre-feet. With a drainage area of 0 square miles and a surface area of 22 acres, Willow Springs plays a crucial role in managing water resources in the region. While the dam has an uncontrolled spillway and no outlet gates, it remains a key piece of infrastructure for water management in Carbon County, Wyoming.
Overall, Willow Springs is a vital water supply dam in the region, providing storage capacity and regulation for Willow Spring Creek. Despite its poor condition assessment, the dam's moderate risk level highlights the importance of ongoing maintenance and risk management measures to ensure its continued functionality and safety for the community. As water resource and climate enthusiasts, it is important to monitor and support the maintenance and improvement of dams like Willow Springs to secure water access and mitigate potential risks in the face of changing environmental conditions.
Year Completed |
1940 |
Dam Length |
330 |
Dam Height |
19 |
River Or Stream |
WILLOW SPRING CREEK |
Primary Dam Type |
Earth |
Surface Area |
22 |
Hydraulic Height |
14 |
Nid Storage |
193 |
Structural Height |
19 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
19 |
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.
Willow Springs