Grandfather Falls

Lincoln County, Wisconsin (near Merrill)

River/Stream: Wisconsin River

High Hazard

Failure would likely cause loss of life

Key Facts

Dam Type
Gravity
Height
32 ft
Dam Length
700 ft
Reservoir Storage
2,540 acre-ft
Year Completed
1906
Primary Purpose
Hydroelectric
Owner Type
Public Utility
Max Discharge
59,830 cfs

Condition Assessment

SatisfactoryLast inspected: 2022-07-20

Hazard Classification: High — This describes the potential consequences of dam failure, not the likelihood of failure.

Condition Assessment: Satisfactory — This describes the current physical condition of the dam based on the most recent inspection.

Location

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Quick Stats

NID ID
WI00743
State
Wisconsin (WI)
Coordinates
45.31330, -89.78500
Age
120 years

Nearby Dams

External Resources

Data sourced from the National Inventory of Dams (NID). Information may not reflect the most current status of this dam. Hazard classification reflects potential consequences of failure, not the likelihood of failure or the current condition.