Slates No. 1 Reservoir Report
Nearby: Werner Cherry No. 1
Last Updated: January 11, 2026
Slates No.
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Summary
1 is a private irrigation dam located in Converse, Wyoming, along the Slates Draw river. Built in 1956, this earth dam stands at 27 feet tall and spans 594 feet in length, with a storage capacity of 77 acre-feet. Despite its age, the dam is still in use for fire protection, stock watering, and irrigation purposes, serving the local community effectively.
The condition assessment of Slates No. 1 indicates poor structural health, with a low hazard potential and moderate risk level, prompting a five-year inspection frequency. The dam features an uncontrolled spillway with a width of 150 feet and a single slide gate outlet for water release. While the dam's emergency action plan readiness and risk management measures are not specified, its location in a low hazard area suggests a manageable level of risk for the surrounding area.
Managed by a private owner and regulated by the state of Wyoming, Slates No. 1 remains an integral part of the local water resource infrastructure. With its historical significance and ongoing role in supporting agriculture and livestock activities in the region, the dam serves as a reminder of the importance of maintaining and monitoring critical water infrastructure for sustainable water resource management in the face of changing climate conditions.
Year Completed |
1956 |
Dam Length |
594 |
Dam Height |
27 |
River Or Stream |
SLATES DRAW |
Primary Dam Type |
Earth |
Surface Area |
1.86 |
Hydraulic Height |
22 |
Drainage Area |
0.8 |
Nid Storage |
77 |
Structural Height |
27 |
Outlet Gates |
Slide (sluice gate) - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
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.
Slates No. 1