West Reservoir Report
Last Updated: December 16, 2025
West is a private water supply dam located in the Big Muddy Oil Field in Converse, Wyoming.
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Summary
Completed in 1950, this Earth dam stands at a height of 40 feet and has a storage capacity of 111 acre-feet. The dam is primarily used for water supply purposes and is regulated by the State of Wyoming, with inspections conducted periodically to ensure its structural integrity.
Despite its low hazard potential, West has been assessed to be in poor condition as of July 2019. The dam's spillway type is uncontrolled, with a width of 100 feet, and it is situated on the West Fork Lonetree Creek. In the event of an emergency, the dam does not have outlet gates, raising concerns about its ability to safely release excess water. Overall, the risk assessment for West is moderate, highlighting the importance of ongoing monitoring and maintenance to mitigate potential hazards and ensure the continued functionality of this essential water resource infrastructure.
Year Completed |
1950 |
Dam Length |
700 |
Dam Height |
40 |
River Or Stream |
WEST FORK LONETREE CREEK |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
35 |
Nid Storage |
111 |
Structural Height |
40 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
40 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Deer Creek In Canyon
|
7cfs |
Box Elder Creek At Boxelder
|
26cfs |
North Platte River At Orin
|
598cfs |
Powder River At Sussex
|
144cfs |
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.
West