Rock
Key Takeaway
Rock is classified as low hazard in Wisconsin. It was completed in 1938 and is 88 years old. Its primary use is recreation.
Physical Details
| Dam Height | 20 ft (taller than 60.1% in WI) |
| Dam Length | 150 ft |
| Dam Type | Arch |
| Max Storage | 1.2K acre-ft |
| Normal Storage | 526 acre-ft |
| Surface Area | 118 acres |
| Drainage Area | 59 sq mi |
| Max Discharge | 4,260 cfs |
| Year Completed | 1938 (88 years old) |
| NID ID | WI00112 |
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
Clark County
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Rock?
Rock 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 Rock?
Rock is owned by Clark County (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Rock built?
Rock was completed in 1938, making it 88 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 Rock?
Rock serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Rock?
Rock 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 Rock last inspected?
Rock was last inspected on April 23, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.