Johnson Falls Flowage 647

Marinette County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)145
Maximum Depth (ft)37
Mean Depth (ft)9
Shoreline (miles)
Bottom Composition70% sand, 10% gravel, 15% rock, 5% muck
Water Clarity — Secchi Depth (ft)
Trophic Status
Drainage BasinDRAINAGE
Lake Classflowage
Public Access
Township
GPS Coordinates45.26760° N, 88.17970° W
WBIC (DNR ID)533300

Fish Species

4 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
Smallmouth BassCommon
WalleyeCommon
Northern PikePresent
PanfishPresent

Boat Landings

1 landing

NameTypeRampTrailersFee
Public Boat LandingPublic

Invasive Species

Invasive species have been documented in or near this lake. Please clean, drain, and dry all watercraft and equipment before leaving to prevent spread.

SpeciesStatusFirst Detected
Banded Mystery SnailConfirmed
Eurasian Water-MilfoilConfirmed
Rusty CrayfishConfirmed

Data sourced from Wisconsin DNR lake surveys. Last scraped: 3/24/2026.