Archie #1 Reservoir Report
Nearby: Engdahl #7 Engdahl #5
Last Updated: January 11, 2026
Archie #1 is a privately owned earth dam located in Garfield, Montana, designed by the USDA NRCS for fire protection, stock, or small fish pond purposes.
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Summary
Completed in 1959, this dam on the TR-HELL CREEK river has a height of 20 feet and a length of 200 feet, with a storage capacity of 61 acre-feet. With a low hazard potential and a moderate risk assessment rating of 3, this dam is regulated and inspected by the DNRC, meeting state permitting and inspection requirements.
Despite being uncontrolled, Archie #1 has a spillway width of 100 feet and a maximum discharge capacity of 500 cubic feet per second. Its location in Congressional District 00, Montana, is overseen by Representative Greg Gianforte (R), and it falls under the jurisdiction of the Omaha District of the USACE. While the dam's condition is currently rated as "Not Rated," its risk management measures and emergency action plan status are not specified, suggesting potential areas for improvement in ensuring its safety and reliability for water resource and climate enthusiasts in the region.
Overall, Archie #1 serves as a vital infrastructure for fire protection and water storage in its community, highlighting the importance of maintaining and monitoring its structural integrity for long-term sustainability. With its historical significance and functional purpose, this privately owned dam stands as a testament to the collaborative efforts between government agencies and private stakeholders in managing water resources and mitigating climate-related risks in Montana.
Year Completed |
1959 |
Dam Length |
200 |
Dam Height |
20 |
River Or Stream |
TR-HELL CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Drainage Area |
0.13 |
Nid Storage |
61 |
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.
Archie #1