Wintermote No. 1 Reservoir Report
Last Updated: December 13, 2025
Wintermote No.
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Summary
1, a privately owned dam located in Converse, Wyoming, on Shawnee Creek, was designed by John A Lambert and completed in 1969 for irrigation purposes. This earth dam stands at a height of 21 feet and has a hydraulic height of 16 feet, with a storage capacity of 417 acre-feet. The dam has a spillway width of 400 feet and is classified as having a low hazard potential, although its condition assessment is poor as of the last inspection in June 2019.
Despite being regulated by the State of Wyoming and meeting permitting, inspection, and enforcement requirements, Wintermote No. 1 poses a moderate risk due to its current condition. With a risk assessment rating of 3, there are concerns about its structural integrity and potential impacts in the event of a failure. It is crucial for water resource and climate enthusiasts to monitor the maintenance and management of this dam to ensure the safety of surrounding communities and the sustainability of water resources in the area.
Year Completed |
1969 |
Dam Length |
1080 |
Dam Height |
21 |
River Or Stream |
SHAWNEE CREEK |
Primary Dam Type |
Earth |
Surface Area |
37 |
Hydraulic Height |
16 |
Nid Storage |
417 |
Structural Height |
21 |
Outlet Gates |
Slide (sluice gate) - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
21 |
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.
Wintermote No. 1