Hewitt Dam
Key Takeaway
Hewitt Dam is classified as low hazard in Montana. It was completed in 1938 and is 88 years old. Its primary use is fish and wildlife pond.
Physical Details
| Dam Height | 10 ft (taller than 3.7% in MT) |
| Dam Length | 1,180 ft |
| Dam Type | Earth |
| Max Storage | 3.3K acre-ft |
| Normal Storage | 1.1K acre-ft |
| Surface Area | 459 acres |
| Drainage Area | 17 sq mi |
| Max Discharge | 6,240 cfs |
| Year Completed | 1938 (88 years old) |
| NID ID | MT00640 |
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
US FISH AND WILDLIFE SERVICE
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Hewitt Dam?
Hewitt Dam 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 Hewitt Dam?
Hewitt Dam is owned by US FISH AND WILDLIFE SERVICE (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hewitt Dam built?
Hewitt Dam was completed in 1938, making it 88 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 Hewitt Dam?
Hewitt Dam serves the following purposes: Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Hewitt Dam?
Hewitt Dam has a dam height of 10 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.
When was Hewitt Dam last inspected?
Hewitt Dam was last inspected on September 23, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.