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- Pennsylvania, United States169
- Philadelphia, Pennsylvania, United States33
- United States of America19
- West Branch Delaware River, Pennsylvania, United States9
- Lancaster County, Pennsylvania, United States6
- Maryland, United States6
- Pittsburgh, Pennsylvania, United States6
- West Virginia, United States6
- Allegheny County, Pennsylvania, United States5
- Delaware, United States5
- Lehigh Valley, Pennsylvania, United States5
- Virginia, United States5
- Chesapeake Bay Basin, Maryland, United States4
- Delaware River, Delaware, United States2
- District Of Columbia, United States2
- Lake Erie, United States2
- Mifflin County Airport, Pennsylvania, United States1
- New Jersey, United States1
- State College, Pennsylvania, United States1