Halligan
Key Takeaway
Halligan is classified as high hazard in Colorado. It was completed in 1970 and is 56 years old. Its primary use is irrigation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 78 ft (taller than 93.7% in CO) |
| Dam Length | 360 ft |
| Dam Type | Arch |
| Max Storage | 9.3K acre-ft |
| Normal Storage | 6.4K acre-ft |
| Surface Area | 253 acres |
| Drainage Area | 349 sq mi |
| Max Discharge | 10,000 cfs |
| Year Completed | 1970 (56 years old) |
| NID ID | CO01169 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
CITY OF FORT COLLINS-WATER
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Halligan?
Halligan is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Halligan?
Halligan is owned by CITY OF FORT COLLINS-WATER (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Halligan built?
Halligan was completed in 1970, making it 56 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 Halligan?
Halligan 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 Halligan?
Halligan has a dam height of 78 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 Halligan last inspected?
Halligan was last inspected on October 13, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.