Region
United States
18
Pennsylvania
16
New Jersey
6
New York (State)
5
Penn
5
Delaware River
4
Ohio River Valley
4
Delaware River (N.Y.-Del. and N.J.)
3
Maryland
3
Philadelphia
3
Virginia
3
West Virginia
3
Chesapeake and Delaware Canal (Del. and Md.)
2
Delaware
2
Great Lakes (North America)
2
Ohio River
2
Schuylkill River (Pa.)
2
Chemung River (N.Y. and Pa.)
1
Delaware River Estuary
1
East (U.S.)
1
Florida
1
Georgia
1
Great Lakes
1
Harrisburg
1
Kanawha River (W. Va.)
1
Louisiana
1
New Jersey Ship Canal
1
Pennsylvania Canal (Pa.)
1
Philadelphia Region (Pa.)
1
Schuylkill Canal (Pa.)
1
Schuylkill River
1
Susquehanna River
1
Union Canal (Pa.)
1
York
1
York Co
1