Anderson Reservoir #1 (Roosevelt) Reservoir Report
Nearby: L Sayer-Magdalena Aytolloha #1
Last Updated: December 31, 2025
Anderson Reservoir #1, also known as Roosevelt, is a privately owned water resource located in Poplar, Montana.
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Summary
This reservoir was designed by the USDA NRCS and is regulated by the DNRC, with a low hazard potential and a moderate risk assessment rating. Completed in 1959, this earth dam stands at a height of 20 feet and has a storage capacity of 51 acre-feet, primarily serving purposes such as fire protection, stock watering, and small fish pond maintenance.
Situated on TR-CHELSEA CREEK in the Roosevelt County of Montana, Anderson Reservoir #1 covers a drainage area of 4.53 square miles and has a maximum discharge rate of 100 cubic feet per second. The spillway type for this reservoir is uncontrolled, with a spillway width of 20 feet. Despite not having a designated inspection frequency or condition assessment rating, the dam is considered to meet regulatory guidelines and poses a relatively low risk to surrounding areas.
Managed by the Natural Resources Conservation Service, Anderson Reservoir #1 plays a crucial role in ensuring water availability for fire emergencies and livestock watering in the region. Its strategic location, combined with a well-maintained dam structure, highlights the importance of this reservoir in supporting local water resource management efforts and climate resilience initiatives in Montana.
Year Completed |
1959 |
Dam Length |
200 |
Dam Height |
20 |
River Or Stream |
TR-CHELSEA CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Drainage Area |
4.53 |
Nid Storage |
51 |
Hazard Potential |
Low |
Nid Height |
20 |
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.
Anderson Reservoir #1 (Roosevelt)