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Rivers

Rock river enters Dodge [County] near the head of the Winnebago marsh and runs in a direction about due south through the county, and is here navigable [the whole distance] with the exception of a distance of about three fourths of a mile at Hustis' Rapids, where there is a fall of nearly seven feet, requiring improvement and affording a water power of great force and value. [This is at] Hustis' Rapids are about twelve miles below the marsh for improvements [there] the bottom of the river here affords excellent foundations, and good materials are found nearby.

The Crawfish river, the outlet of Fox Lake runs parallel to Rock river & anout twelve miles west of it; this stream also runs through the county from north to south.

Ossin river, sometimes, but improperly called Rock river, rises in Washington county and running westward with a remarkably crooked course, enters Rock river in township twelve near the foot of the Winnebago marsh.

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