Upper Chinns
Key Takeaway
Upper Chinns is classified as low hazard in Colorado. It was completed in 1937 and is 89 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 22 ft (taller than 43.8% in CO) |
| Dam Length | 420 ft |
| Dam Type | Earth |
| Max Storage | 138 acre-ft |
| Normal Storage | 92 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 882 cfs |
| Year Completed | 1937 (89 years old) |
| Year Modified | 1956 |
| NID ID | CO00190 |
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
AGRICULTURAL DITCH & RESERVOIR COMPANY (ACKER, PET
Private
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High Hazard 34 ftFrequently Asked Questions
What is the hazard classification of Upper Chinns?
Upper Chinns 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 Upper Chinns?
Upper Chinns is owned by AGRICULTURAL DITCH & RESERVOIR COMPANY (ACKER, PET (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Chinns built?
Upper Chinns was completed in 1937, making it 89 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 Upper Chinns?
Upper Chinns 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 Upper Chinns?
Upper Chinns has a dam height of 22 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 Upper Chinns last inspected?
Upper Chinns was last inspected on July 11, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.