Vaux #2 Reservoir Report
Nearby: Vaux #1 Sportman Dam
Last Updated: December 14, 2025
Vaux #2 is a private irrigation dam located in Sidney, Montana, along Lone Tree Creek.
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Summary
Completed in 1960, this earth dam stands at a height of 15 feet and has a storage capacity of 120 acre-feet. The dam serves the primary purpose of irrigation, with a normal storage capacity of 42.5 acre-feet and a maximum discharge rate of 4000 cubic feet per second. With a low hazard potential and a condition assessment of "Not Rated," Vaux #2 has been regulated and inspected by the state agency DNRC.
The dam covers a surface area of 7 acres and is situated within a drainage area of 83 square miles. Despite its last inspection dating back to 1995, Vaux #2 continues to play a vital role in water resource management in the region. The dam's location in Richland County, Montana, highlights its importance in supporting agricultural activities in the area. As climate change impacts water resources, structures like Vaux #2 become essential for sustainable water management practices and adaptation strategies in the face of evolving environmental conditions.
Year Completed |
1960 |
Dam Length |
150 |
Dam Height |
15 |
River Or Stream |
LONE TREE CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
12 |
Drainage Area |
83 |
Nid Storage |
120 |
Hazard Potential |
Low |
Nid Height |
15 |
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.
Vaux #2