Prevost #2 Reservoir Report
Nearby: A M Prevost Jjjj Russ
Last Updated: December 14, 2025
Prevost #2 is a private earth dam located in Lambert, Montana, along the TR-East Fork of East Foxcr river.
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Summary
Built in 1943 by the USDA NRCS, this dam serves multiple purposes including fire protection, stock, and small fish pond. With a dam height of 18 feet and a hydraulic height of 12 feet, Prevost #2 has a storage capacity of 84 acre-feet and a drainage area of 2.72 square miles.
Despite its age, Prevost #2 remains in significant hazard potential due to its uncontrolled spillway type and lack of recent condition assessments. The dam has a moderate risk assessment score of 3, indicating a need for ongoing monitoring and potential risk management measures. It is regulated by the Montana Department of Natural Resources and Conservation (DNRC), with state jurisdiction, permitting, inspection, and enforcement in place to ensure its safety and compliance with regulations.
As a key infrastructure for water resource management in the region, Prevost #2 plays a crucial role in providing essential services for fire protection, livestock, and fisheries. Its location in Richland County, Montana, highlights its importance in the local ecosystem and economy. Enthusiasts of water resources and climate will find Prevost #2 to be a captivating case study of dam management and the intersection of human activity with natural systems.
Year Completed |
1943 |
Dam Length |
480 |
Dam Height |
18 |
River Or Stream |
TR-EAST FORK OF EAST FOXCR |
Primary Dam Type |
Earth |
Hydraulic Height |
12 |
Drainage Area |
2.72 |
Nid Storage |
84 |
Hazard Potential |
Significant |
Nid Height |
18 |
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.
Prevost #2