Longmont Reservoir
Key Takeaway
Longmont Reservoir is classified as low hazard in Colorado. It was completed in 1900 and is 126 years old. Its primary use is water supply.
Physical Details
| Dam Height | 30 ft (taller than 65.6% in CO) |
| Dam Length | 110 ft |
| Dam Type | Concrete |
| Max Storage | 75 acre-ft |
| Normal Storage | 75 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 108 sq mi |
| Max Discharge | 3,000 cfs |
| Year Completed | 1900 (126 years old) |
| NID ID | CO02369 |
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
CITY OF LONGMONT (HUSON, KEN)
Local Government
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High Hazard 52 ftFrequently Asked Questions
What is the hazard classification of Longmont Reservoir?
Longmont Reservoir 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 Longmont Reservoir?
Longmont Reservoir is owned by CITY OF LONGMONT (HUSON, KEN) (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Longmont Reservoir built?
Longmont Reservoir 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 Longmont Reservoir?
Longmont Reservoir serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Longmont Reservoir?
Longmont Reservoir has a dam height of 30 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 Longmont Reservoir last inspected?
Longmont Reservoir was last inspected on April 13, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.