Holloway Lake
Key Takeaway
Holloway Lake is classified as low hazard in Montana. It was completed in 1900 and is 126 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 20 ft (taller than 44.5% in MT) |
| Dam Length | 63 ft |
| Dam Type | Concrete |
| Normal Storage | 280 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 3 sq mi |
| Year Completed | 1900 (126 years old) |
| NID ID | MT00841 |
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
SWEENEY CR WATER USERS
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Holloway Lake?
Holloway Lake 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 Holloway Lake?
Holloway Lake is owned by SWEENEY CR WATER USERS (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Holloway Lake built?
Holloway Lake was completed in 1900, making it 126 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 Holloway Lake?
Holloway Lake serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Holloway Lake?
Holloway Lake 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.
When was Holloway Lake last inspected?
Holloway Lake was last inspected on June 19, 2003. Inspection dates indicate when a formal review occurred, not the results of that inspection.