Big Four Reservoir Dam
Key Takeaway
Big Four Reservoir Dam is classified as low hazard in Illinois. It was completed in 1906 and is 120 years old. Its primary use is recreation.
Physical Details
| Dam Height | 27 ft (taller than 51.5% in IL) |
| Dam Length | 391 ft |
| Dam Type | Earth |
| Max Storage | 276 acre-ft |
| Normal Storage | 187 acre-ft |
| Year Completed | 1906 (120 years old) |
| NID ID | IL00201 |
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
ELTON SKINNER
Private
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What is the hazard classification of Big Four Reservoir Dam?
Big Four Reservoir 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 Big Four Reservoir Dam?
Big Four Reservoir Dam is owned by ELTON SKINNER (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Big Four Reservoir Dam built?
Big Four Reservoir Dam was completed in 1906, making it 120 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 Big Four Reservoir Dam?
Big Four Reservoir 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 Big Four Reservoir Dam?
Big Four Reservoir Dam has a dam height of 27 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 Big Four Reservoir Dam last inspected?
Big Four Reservoir Dam was last inspected on June 2, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.