Polly A. Deane
Key Takeaway
Polly A. Deane is classified as high hazard in Colorado. It was completed in 1908 and is 118 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 | 20 ft (taller than 36.1% in CO) |
| Dam Length | 1,230 ft |
| Dam Type | Earth |
| Max Storage | 760 acre-ft |
| Normal Storage | 512 acre-ft |
| Surface Area | 38 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,150 cfs |
| Year Completed | 1908 (118 years old) |
| NID ID | CO00336 |
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
BERGEN DITCH & RESERVOIR COMPANY (EASTON, ROBERT)
Private
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What is the hazard classification of Polly A. Deane?
Polly A. Deane 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 Polly A. Deane?
Polly A. Deane is owned by BERGEN DITCH & RESERVOIR COMPANY (EASTON, ROBERT) (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Polly A. Deane built?
Polly A. Deane was completed in 1908, making it 118 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 Polly A. Deane?
Polly A. Deane serves the following purposes: Irrigation, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Polly A. Deane?
Polly A. Deane 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 Polly A. Deane last inspected?
Polly A. Deane was last inspected on November 23, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.