[Big D]

That design seems useful in many places where there are no rapid currents. My Au Sable River boat is copied from a design used in the 1890-1910's to carry supplies to the logging camps on the Au Sable and Manistee Rivers around Grayling, Mich. Today's boats typically are about 23 feet long, and a width across the square bottom of about 28". Original boats were basically made from 4 long planks. Today's boats are from 3 sheets of plywood