Fannon #1 Reservoir Report
Nearby: Stinebaugh #2 Fannon #2
Last Updated: December 6, 2025
Fannon #1 is a privately owned dam located in Garfield, Montana, along the TR-FRAZIER CREEK.
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Summary
Built in 1938, this earth dam stands at a height of 30 feet and has a storage capacity of 33 acre-feet. The primary purpose of the dam is for fire protection, stock, or as a small fish pond. It is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is under state jurisdiction for permitting, inspection, and enforcement.
Despite being classified as having a low hazard potential, Fannon #1 has not been rated for its condition assessment. There is no information available on the last inspection date, inspection frequency, emergency action plan preparedness, or risk assessment. The dam does not have inundation maps prepared, and there are no risk management measures in place. Overall, there is limited data on the safety and maintenance of Fannon #1, making it a topic of interest for water resource and climate enthusiasts who are concerned about the potential risks associated with aging infrastructure.
Year Completed |
1938 |
Dam Length |
300 |
Dam Height |
30 |
River Or Stream |
TR-FRAZIER CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
30 |
Nid Storage |
33 |
Hazard Potential |
Low |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Nelson Creek Near Van Norman Mt
|
33cfs |
Musselshell River At Mosby Mt
|
12cfs |
Flatwillow Creek Near Mosby Mt
|
17cfs |
Milk River At Nashua Mt
|
233cfs |
Milk River At Tampico Mt
|
123cfs |
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.
Fannon #1