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Rivers
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two hundred and forty five feet above Lake Michigan. Requiring a lockage (should the summit be cut down seventeen and a half feet to the level of the head Marsh in township twenty range nineteen, of two hundred and twenty eight feet on the east side and sixty eight feet on the west side of the summit; or thirty seven locks of eight feet lift each within forty miles. It is supposed that an abundant supply of water can be commanded on this summit.

The East and West Twin rivers are two streams rising in Brown county and running in a southerly direction nearly parallel with each other, [and] (of nearly equal size), and entering Lake Michigan six miles north east from the mouth of the Manitowoc. They unite their waters just before they enter the Lake. The East Twin runs nearly its whole course almost exactly parallel to the lake shore, a circumstance observed in many other streams. Like the other tributaries of Lake Michigan they have rapids a few miles above their mouth.

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