Miller No. 2 Reservoir Report
Nearby: Clay No. 1 Miller No. 1
Last Updated: December 5, 2025
Miller No.
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Summary
2, located in Chugwater, Wyoming, is a privately owned earth dam that serves primarily for irrigation purposes. Completed in 1951, this structure stands 29 feet tall with a hydraulic height of 24 feet and a length of 600 feet. It has a storage capacity of 108 acre-feet and a surface area of 11 acres, drawing water from the North Chugwater Creek for agricultural use. Despite its low hazard potential, the dam's condition assessment reveals it to be in poor condition, warranting regular inspections and potential maintenance.
Managed by the State Engineer's Office, Miller No. 2 is regulated, permitted, inspected, and enforced by the state authorities to ensure its safety and compliance with regulations. The dam features an uncontrolled spillway with a width of 70 feet and an outlet gate for water discharge. The inspection frequency is set at every five years, with the last assessment conducted in June 2021. While the dam poses a moderate risk level, there is no Emergency Action Plan (EAP) in place, raising concerns about emergency preparedness and response in case of a hazard event.
With Liz Cheney representing Congressional District 00 in Wyoming, Miller No. 2 remains a vital water resource infrastructure in the region despite its poor condition. Climate and water resource enthusiasts are urged to monitor the dam's risk management measures and advocate for sustainable practices to ensure the safety and longevity of this essential irrigation structure. As discussions around water security and climate resilience continue, addressing the maintenance needs of dams like Miller No. 2 becomes crucial in safeguarding water availability for agricultural and other purposes in the face of changing environmental conditions.
Year Completed |
1951 |
Dam Length |
600 |
Dam Height |
29 |
River Or Stream |
NORTH CHUGWATER CREEK |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
24 |
Nid Storage |
108 |
Structural Height |
29 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
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.
Miller No. 2