Alexander Reservoir Report
Nearby: Van #2 Hensleigh #2
Last Updated: December 6, 2025
Alexander is a private water resource located in Garfield, Montana, on TR-BIG DRY CREEK.
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Summary
Built in 1938, this earth dam stands at 22 feet high and spans 530 feet in length, with a storage capacity of 70 acre-feet. The primary purpose of Alexander is for fire protection, stock watering, and small fish pond utilization.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Alexander is regulated, permitted, inspected, and enforced by the state. Despite its low hazard potential, the condition assessment of the dam is currently rated as "Not Rated," with no specific risk assessment or management measures identified. The emergency action plan (EAP) for Alexander has not been prepared or updated, raising important questions about the readiness and response in case of any critical events.
Located in a remote area with no associated structures or nearby city, Alexander is a vital resource for the local community and wildlife. As climate change impacts continue to affect water resources, it is crucial for enthusiasts and stakeholders to monitor and advocate for the safety and sustainability of structures like Alexander to ensure their functionality and resilience in the face of evolving environmental challenges.
Year Completed |
1938 |
Dam Length |
530 |
Dam Height |
22 |
River Or Stream |
TR-BIG DRY CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
22 |
Nid Storage |
70 |
Hazard Potential |
Low |
Nid Height |
22 |
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.
Alexander