M. W. Reservoir Reservoir Report
Nearby: Enl. Brunner Rosean
Last Updated: December 8, 2025
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Summary
W. Reservoir, located in Weston County, Wyoming, is a private-owned earth dam structure completed in 1912 with a primary purpose of irrigation. The reservoir has a storage capacity of 2410 acre-feet and covers a surface area of 122 acres, drawing water from Stockade Beaver Creek. The dam stands at a height of 35 feet and has a spillway width of 10 feet, with an uncontrolled spillway type.
Despite its historical significance, M. W. Reservoir is currently assessed to be in poor condition, with a low hazard potential and a moderate risk assessment rating. The last inspection in June 2020 revealed the need for improvement in its structural integrity and emergency preparedness. The dam is regulated by the State of Wyoming through the SEO agency, with regular inspections and enforcement measures in place.
As a critical water resource for irrigation in the region, M. W. Reservoir serves as a vital infrastructure for agriculture in the area. With its location in a picturesque setting and its contribution to water management in the region, the reservoir remains an important asset for water resource and climate enthusiasts.
Year Completed |
1912 |
Dam Length |
1240 |
Dam Height |
35 |
River Or Stream |
STOCKADE BEAVER CREEK |
Primary Dam Type |
Earth |
Surface Area |
122 |
Hydraulic Height |
30 |
Nid Storage |
2410 |
Structural Height |
35 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
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.
M. W. Reservoir