Wagon Prong Dam Reservoir Report
Nearby: Hampton Detention Ray Detention Dam
Last Updated: December 5, 2025
Wagon Prong Dam, located in Washakie, Wyoming, is a gravity dam primarily used for water supply.
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Summary
Built in 2003 by the Bureau of Land Management, this federal-owned structure stands at a height of 36 feet with a hydraulic height of 30 feet. With a storage capacity of 42.9 acre-feet and a surface area of 3.9 acres, the dam serves the West Fork Hampton Draw and Big Ho River or stream.
Despite its low hazard potential and fair condition assessment, Wagon Prong Dam is subject to regular state inspections, enforcement, and permitting to ensure its safety and compliance with regulations. The Omaha District of the US Army Corps of Engineers oversees its operations, while the Bureau of Land Management is responsible for its design, construction, regulation, and inspection. With a risk assessment rating of 2 (high), the dam's risk management measures are crucial in mitigating potential threats and ensuring the safety of surrounding communities in case of emergencies.
As a key water resource infrastructure in Wyoming, Wagon Prong Dam plays a vital role in providing water supply to the region. Its construction and maintenance are essential for sustaining the local ecosystem, agriculture, and residential needs. With its strategic location and federal ownership, the dam represents a significant asset in managing water resources and addressing the challenges posed by climate change in the area.
Year Completed |
2003 |
Dam Length |
290 |
River Or Stream |
WEST FORK HAMPTON DRAW BIG HO |
Primary Dam Type |
Gravity |
Surface Area |
3.9 |
Hydraulic Height |
30 |
Drainage Area |
400 |
Nid Storage |
42.9 |
Structural Height |
36 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
36 |
Seasonal Comparison
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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.
Wagon Prong Dam