Michelena #3 Reservoir Report
Nearby: Henry No. 1 Stock 22 - 36
Last Updated: December 16, 2025
Michelena #3 is a private irrigation dam located in Johnson, Wyoming, along the South Park Draw river.
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Summary
Built in 2006, this earth dam stands at a height of 32 feet and has a storage capacity of 49 acre-feet. The dam serves multiple purposes including irrigation, fire protection, stock, and small fish pond management, with a normal storage capacity of 31 acre-feet.
With a low hazard potential and fair condition assessment, Michelena #3 is regularly inspected by state regulatory agencies for compliance and safety. The dam features an uncontrolled spillway with a width of 50 feet, and an outlet gate for water management. In the event of an emergency, the dam is equipped with an Emergency Action Plan (EAP) to ensure the safety of downstream communities.
Climate and water resource enthusiasts will appreciate the strategic design and functionality of Michelena #3, which plays a crucial role in supporting agricultural activities in the region. The moderate risk assessment score indicates the need for ongoing monitoring and risk management measures to keep the dam in optimal condition for its various purposes. With its location in a congressional district represented by Liz Cheney, Michelena #3 stands as a testament to the importance of responsible water resource management in Wyoming.
Year Completed |
2006 |
Dam Length |
354 |
Dam Height |
32 |
River Or Stream |
SOUTH PARK DRAW |
Primary Dam Type |
Earth |
Surface Area |
3.52 |
Hydraulic Height |
27 |
Drainage Area |
0.1 |
Nid Storage |
49 |
Structural Height |
39 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
39 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wild Horse Creek Near Arvada
|
0cfs |
Powder River At Arvada
|
206cfs |
Clear Creek Near Buffalo
|
16cfs |
Clear Creek Near Arvada
|
256cfs |
Piney Creek At Kearny
|
113cfs |
Rock Creek Near Buffalo
|
70cfs |
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.
Michelena #3