Hidden Valley Lake Dam
Key Takeaway
Hidden Valley Lake Dam is classified as significant hazard in Illinois. It was completed in 1968 and is 58 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 16 ft (taller than 20.3% in IL) |
| Dam Length | 505 ft |
| Dam Type | Earth |
| Max Storage | 256 acre-ft |
| Normal Storage | 40 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 2,116 cfs |
| Year Completed | 1968 (58 years old) |
| NID ID | IL00671 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
RASMUSSEN & GIANNINI
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Hidden Valley Lake Dam?
Hidden Valley Lake Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Hidden Valley Lake Dam?
Hidden Valley Lake Dam is owned by RASMUSSEN & GIANNINI (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hidden Valley Lake Dam built?
Hidden Valley Lake Dam was completed in 1968, making it 58 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 Hidden Valley Lake Dam?
Hidden Valley Lake Dam 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 Hidden Valley Lake Dam?
Hidden Valley Lake Dam 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 Hidden Valley Lake Dam last inspected?
Hidden Valley Lake Dam was last inspected on May 22, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.