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United States Rivers

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Flat Branch

StatesIllinois
Length37.7 miles
Watershed Length*38 miles
MouthSangamon River - South Fork ⤏ Gulf of Mexico
GNIS408433
— Watercourse ‐ ‐ ‐ Watershed

* Note: Watershed is mostly rivers/streams 15+ miles in length.


Data from United States Geological Survey