Calahan
Key Takeaway
Calahan is classified as low hazard in Colorado. It was completed in 1963 and is 63 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 25 ft (taller than 53.1% in CO) |
| Dam Length | 1,880 ft |
| Dam Type | Earth |
| Max Storage | 679 acre-ft |
| Normal Storage | 374 acre-ft |
| Surface Area | 61 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,708 cfs |
| Year Completed | 1963 (63 years old) |
| NID ID | CO00405 |
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
WOODMOOR WATER AND SANITATION DISTRICT NO.1 (JESSI
Private
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Low Hazard 9 ftFrequently Asked Questions
What is the hazard classification of Calahan?
Calahan 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 Calahan?
Calahan is owned by WOODMOOR WATER AND SANITATION DISTRICT NO.1 (JESSI (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Calahan built?
Calahan was completed in 1963, making it 63 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 Calahan?
Calahan serves the following purposes: Irrigation, Fire Protection, Stock, Or Small Fish Pond, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Calahan?
Calahan has a dam height of 25 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 Calahan last inspected?
Calahan was last inspected on September 19, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.