Colwil Lake Dam
Key Takeaway
Colwil Lake Dam is classified as low hazard in Missouri. It was completed in 1959 and is 67 years old. Its primary use is recreation.
Physical Details
| Dam Height | 47 ft (taller than 93.7% in MO) |
| Dam Length | 180 ft |
| Dam Type | Earth |
| Max Storage | 360 acre-ft |
| Normal Storage | 299 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 3,200 cfs |
| Year Completed | 1959 (67 years old) |
| Year Modified | 1995 |
| NID ID | MO30058 |
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
RON DASSOW
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Colwil Lake Dam?
Colwil Lake Dam 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 Colwil Lake Dam?
Colwil Lake Dam is owned by RON DASSOW (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Colwil Lake Dam built?
Colwil Lake Dam was completed in 1959, making it 67 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 Colwil Lake Dam?
Colwil Lake Dam serves the following purposes: Recreation, Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Colwil Lake Dam?
Colwil Lake Dam has a dam height of 47 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 Colwil Lake Dam last inspected?
Colwil Lake Dam was last inspected on October 23, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.