Dm No. 1 Reservoir Report
Last Updated: December 7, 2025
Dm No.
°F
°F
mph
Wind
%
Humidity
Summary
1 is a privately owned earth dam located in Washakie, Wyoming, along the DM Draw Offstream. Built in 1983 by designer Stanton J. Abell, Jr., this dam serves multiple purposes including fire protection, stock, and small fish pond management. With a structural height of 22 feet and a total length of 900 feet, Dm No. 1 has a storage capacity of 935 acre-feet, with a normal storage level of 29 acre-feet.
Although classified as having a low hazard potential, Dm No. 1 is regularly inspected by the State Regulatory Agency for compliance with safety and operational standards. The dam is equipped with two controlled outlet gates and a spillway width of 60 feet. The overall condition of the dam is assessed as fair, with a risk assessment rating of high (2) due to its critical role in water resource management for the surrounding area. Despite its age, Dm No. 1 continues to provide essential water management services for the community.
In summary, Dm No. 1 is a vital water infrastructure asset in Wyoming, serving as a reliable source for fire protection, stock watering, and recreational use. Despite its age, the dam remains in fair condition and is regularly monitored to ensure the safety of downstream areas and the surrounding environment. Its strategic location and design make Dm No. 1 a key component in managing water resources and climate-related challenges in the region.
Year Completed |
1983 |
Dam Length |
900 |
Dam Height |
22 |
River Or Stream |
DM DRAW OFFSTREAM |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
17 |
Nid Storage |
935 |
Structural Height |
22 |
Outlet Gates |
Other Controlled - 2 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
22 |
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.
Dm No. 1