South Fork Reservoir Reservoir Report
Last Updated: December 5, 2025
South Fork Reservoir, located in Silver Bow, Montana, is a vital water resource managed by local government authorities.
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Summary
Completed in 1946, this earth dam stands at a height of 20 feet and serves multiple purposes such as fire protection, livestock watering, and providing a small fish pond. With a maximum storage capacity of 51 acre-feet and a normal storage of 26 acre-feet, the reservoir plays a crucial role in ensuring water availability for the surrounding community.
Situated on Divide Creek, South Fork Reservoir is subject to state regulations and inspections by the Montana Department of Natural Resources and Conservation (DNRC). The dam's hazard potential is rated as significant, although its condition assessment is currently not rated. Despite lacking a detailed risk assessment or emergency action plan, the reservoir remains a key asset for water management in the region. As a popular destination for water resource and climate enthusiasts, South Fork Reservoir offers a picturesque setting for outdoor activities and wildlife observation.
In the event of an emergency, the readiness and response protocols for South Fork Reservoir are yet to be fully established, highlighting the need for proactive risk management measures. With its scenic location and valuable water storage capacity, the reservoir serves as a reminder of the delicate balance between water resource management and environmental conservation. As stakeholders continue to monitor and maintain this critical infrastructure, South Fork Reservoir will remain a key player in ensuring water security for the community and promoting sustainable practices for future generations.
Year Completed |
1946 |
Dam Length |
600 |
Dam Height |
20 |
River Or Stream |
DIVIDE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
51 |
Hazard Potential |
Significant |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Fleecer Cabin
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Beaverdam
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Beaverdam Campground and Picnic Area
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Greenwood Bottoms FAS
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Divide Bridge
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Divide Bridge Campground
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South Fork Reservoir
Big Hole River