Windmill No. 1 Reservoir Report
Nearby: Spellman B1-27-5475 Enl. 32-6
Last Updated: December 13, 2025
Windmill No.
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Summary
1, located in Campbell, Wyoming, serves multiple purposes including irrigation, fire protection, stock watering, and small fish pond support. This earth-type dam, designed by Hugh Lowham and completed in 2008, stands at a height of 38 feet with a maximum storage capacity of 35 acre-feet. The dam's primary source of water is the Baby Draw river or stream, with a drainage area of 0.02 square miles and a surface area of 2.4 acres.
Despite its low hazard potential and fair condition assessment, Windmill No. 1 is regularly inspected by state authorities, with the last assessment conducted in May 2021. The dam features an uncontrolled spillway with a width of 25 feet and a maximum discharge capacity of 341 cubic feet per second. With a risk assessment rating of moderate (3), the dam is considered to have a medium level of risk, prompting the need for ongoing risk management measures. Overall, Windmill No. 1 serves as a vital resource for water management in the region, showcasing the importance of sustainable infrastructure for climate resilience and water conservation efforts.
Year Completed |
2008 |
Dam Length |
265 |
Dam Height |
38 |
River Or Stream |
BABY DRAW |
Primary Dam Type |
Earth |
Surface Area |
2.4 |
Hydraulic Height |
33 |
Drainage Area |
0.02 |
Nid Storage |
35 |
Structural Height |
38 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
38 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wild Horse Creek Near Arvada
|
0cfs |
Powder River At Arvada
|
180cfs |
Clear Creek Near Arvada
|
256cfs |
Powder River At Moorhead Mt
|
60cfs |
Little Powder River Ab Dry Creek
|
1cfs |
Stonepile Creek At Mouth
|
3cfs |
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.
Windmill No. 1