Granby Dike 1
Key Takeaway
Granby Dike 1 is classified as high hazard in Colorado. It was completed in 1950 and is 76 years old. Its primary use is hydroelectric. 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 | 98 ft (taller than 96% in CO) |
| Dam Length | 2,170 ft |
| Dam Type | Earth |
| Max Storage | 539.8K acre-ft |
| Normal Storage | 539.8K acre-ft |
| Surface Area | 7,260 acres |
| Max Discharge | 12,000 cfs |
| Year Completed | 1950 (76 years old) |
| NID ID | CO01656 |
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
RECLAMATION
Federal Government
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What is the hazard classification of Granby Dike 1?
Granby Dike 1 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 Granby Dike 1?
Granby Dike 1 is owned by RECLAMATION (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Granby Dike 1 built?
Granby Dike 1 was completed in 1950, making it 76 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 Granby Dike 1?
Granby Dike 1 serves the following purposes: Hydroelectric, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Granby Dike 1?
Granby Dike 1 has a dam height of 98 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 Granby Dike 1 last inspected?
Granby Dike 1 was last inspected on September 18, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.