Lewis
Key Takeaway
Lewis is classified as low hazard in Colorado. It was completed in 1904 and is 122 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 16 ft (taller than 23.3% in CO) |
| Dam Length | 190 ft |
| Dam Type | Rockfill |
| Max Storage | 175 acre-ft |
| Normal Storage | 175 acre-ft |
| Surface Area | 25 acres |
| Max Discharge | 100 cfs |
| Year Completed | 1904 (122 years old) |
| NID ID | CO00929 |
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
Newmont Mining Corporation
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Lewis?
Lewis 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 Lewis?
Lewis is owned by Newmont Mining Corporation (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lewis built?
Lewis was completed in 1904, making it 122 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 Lewis?
Lewis serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lewis?
Lewis has a dam height of 16 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 Lewis last inspected?
Lewis was last inspected on August 24, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.