South Fork Reservoir
Key Takeaway
South Fork Reservoir is classified as significant hazard in Montana. It was completed in 1946 and is 80 years old. Its primary use is fire protection. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 20 ft (taller than 44.5% in MT) |
| Dam Length | 600 ft |
| Dam Type | Earth |
| Max Storage | 51 acre-ft |
| Normal Storage | 26 acre-ft |
| Year Completed | 1946 (80 years old) |
| NID ID | MT03725 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
BUTTE-SILVER BOW
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of South Fork Reservoir?
South Fork Reservoir is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates South Fork Reservoir?
South Fork Reservoir is owned by BUTTE-SILVER BOW (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was South Fork Reservoir built?
South Fork Reservoir was completed in 1946, making it 80 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of South Fork Reservoir?
South Fork Reservoir serves the following purposes: Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is South Fork Reservoir?
South Fork Reservoir has a dam height of 20 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.