A Anderson Reservoir Report
Nearby: Eddie #1 Long Horn #4
Last Updated: December 19, 2025
A Anderson is a privately owned earth dam located in Valley County, Montana, with a primary purpose of providing fire protection, stock, and a small fish pond.
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Summary
Built in 1960, this dam stands at a height of 15 feet and has a length of 700 feet, offering a storage capacity of 55 acre-feet. Situated on the TR-SNOW COULEE river or stream, A Anderson is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is inspected, permitted, and enforced by the state agency.
With a low hazard potential and a condition assessment of "Not Rated," A Anderson's emergency action plan (EAP) status and risk assessment measures are currently unknown. The dam does not have an inundation map prepared or updated emergency contacts. Although the dam has not been rated for its condition, its purpose of fire protection and water storage for stock and fish pond highlights its importance in providing vital resources in the region. As a water resource and climate enthusiast, understanding the infrastructure and regulatory oversight of dams like A Anderson is crucial for ensuring their safety and sustainability for the community and the environment.
Year Completed |
1960 |
Dam Length |
700 |
Dam Height |
15 |
River Or Stream |
TR-SNOW COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
55 |
Hazard Potential |
Low |
Nid Height |
15 |
Seasonal Comparison
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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.
A Anderson