Three Forks Reservoir Report
Nearby: House Robber's Roost
Last Updated: December 7, 2025
Located in Newcastle, Wyoming, Three Forks is a private dam with a primary purpose of fire protection, stock, or small fish pond.
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Summary
Completed in 1965, this earth dam stands at a height of 31 feet and has a storage capacity of 64 acre-feet. With a low hazard potential and fair condition assessment, Three Forks is regulated by the state and subject to regular inspection, enforcement, and permitting by the Wyoming State Engineer's Office.
Situated on the Three Forks Drive near Robbers Rest, this dam plays a crucial role in providing fire protection and supporting local livestock and fish populations. With a moderate risk assessment rating, Three Forks is equipped with an uncontrolled spillway and stands as a vital resource for water management in the region. Despite its age, the dam continues to serve its intended purposes effectively, ensuring the safety and well-being of the surrounding community.
Managed by private owners, Three Forks exemplifies the synergy between human intervention and natural resources. With Liz Cheney (R) representing the Congressional District in which it resides, this dam serves as a testament to the importance of sustainable water resource management in the face of evolving climate challenges. Through ongoing monitoring and maintenance efforts, Three Forks remains a cornerstone of water infrastructure in Weston County, Wyoming.
Year Completed |
1965 |
Dam Length |
338 |
Dam Height |
31 |
River Or Stream |
THREEEFORKS DR, TR ROBBERS RST |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
26 |
Nid Storage |
64 |
Structural Height |
31 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
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.
Three Forks