Savannah River
This is another map based on Corps of Engineers data.  For some reason, it started at Mile Point 11.  So I extended it down to the Atlantic Ocean.  Also, the Corps stopped the numbering at Mile Point 200 although the river extends well beyond that.  If anyone were interested in the upper reach, the numbering could be easily extended.

Savannah River

This is another map based on Corps of Engineers data.  For some reason, it started at Mile Point 11.  So I extended it down to the Atlantic Ocean.  Also, the Corps stopped the numbering at Mile Point 200 although the river extends well beyond that.  If anyone were interested in the upper reach, the numbering could be easily extended.