Westermark
Key Takeaway
Westermark is classified as low hazard in Montana. It was completed in 1964 and is 62 years old. Its primary use is recreation.
Physical Details
| Dam Height | 45 ft (taller than 96% in MT) |
| Dam Length | 360 ft |
| Dam Type | Earth |
| Max Storage | 131 acre-ft |
| Normal Storage | 73 acre-ft |
| Drainage Area | 1 sq mi |
| Max Discharge | 240 cfs |
| Year Completed | 1964 (62 years old) |
| NID ID | MT00428 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
A V SWANBERG
Private
Nearby Dams
Mccracken Brothers
Toole, MT
Low Hazard 50 ftJim Judisch
Toole, MT
Low Hazard 20 ftGerman Reservoir
Toole, MT
Low Hazard 15 ftLoubren INCorporated #1
Toole, MT
Low Hazard 30 ftBar Z F Ranch INCorporated #1
Toole, MT
Low Hazard 12 ftThree Dollar Bill
Toole, MT
Low Hazard 24 ftJohnson (Toole)
Toole, MT
Low Hazard 15 ftG N R R Dunkirk Reservoir
Toole, MT
Significant Hazard 14 ftFrequently Asked Questions
What is the hazard classification of Westermark?
Westermark is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Westermark?
Westermark is owned by A V SWANBERG (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Westermark built?
Westermark was completed in 1964, making it 62 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 Westermark?
Westermark serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Westermark?
Westermark has a dam height of 45 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.