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