21. Located adjacent to the Customs House, it marked the " head of navigation " of the Pioneer River. 22. The major adjoining cities each originated at the head of navigation of these river, called the fall line. 23. The river steamers had to stop here because it was the head of navigation on the Ottawa River. 24. Marshyhope Creek begins in southwestern Kent County, Delaware, near the city of Federalsburg is the head of navigation . 25. The head of navigation was a short distance northwest of the town, where the river flowed through the pass. 26. The head of navigation , Cowlitz Landing, was about 35 east of the meeting of the Clackamas with the Columbia. 27. The aim was to form a line between Louisville and Fremont, the head of navigation on the Sandusky River. 28. Seaford is at the head of navigation of the Nanticoke River, about 40 miles from its mouth on the Chesapeake. 29. The Customs House also addresses the approach to the Forgan Bridge, which marked the head of navigation of the river. 30. The goal was to reach the Kanawha River at its head of navigation , about east of today's Charleston, West Virginia.
