Upper Three Mile #1
Key Takeaway
Upper Three Mile #1 is classified as low hazard in Colorado. It was completed in 2006 and is 20 years old. Its primary use is recreation.
Physical Details
| Dam Height | 37 ft (taller than 78.2% in CO) |
| Dam Length | 353 ft |
| Dam Type | Earth |
| Max Storage | 75 acre-ft |
| Normal Storage | 48 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 662 cfs |
| Year Completed | 2006 (20 years old) |
| NID ID | CO02950 |
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
MATHESON, MONTE
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Upper Three Mile #1?
Upper Three Mile #1 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 Three Mile #1?
Upper Three Mile #1 is owned by MATHESON, MONTE (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Three Mile #1 built?
Upper Three Mile #1 was completed in 2006, making it 20 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 Three Mile #1?
Upper Three Mile #1 serves the following purposes: Recreation, Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Upper Three Mile #1?
Upper Three Mile #1 has a dam height of 37 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 Three Mile #1 last inspected?
Upper Three Mile #1 was last inspected on August 6, 2010. Inspection dates indicate when a formal review occurred, not the results of that inspection.