1.) Delaware River
2.) Christina River
3.) Schuylkill River
4.) Little Schuylkill River
5.) Lehigh River
6.) Lackawaxen River
7.) Gunpowder River
8.) Susquehanna River
9.) Juniata River
10.) Lackawanna River
11.) Chemung River
12.) Ohio River
13.) Mahoning River
14.) Shenango River
15.) Allegheny River
16.) Stoneycreek River
17.) Clarion River
18.) Monongahela River
19.) Youghiogheny River
20.) Casselman River
21.) Cheat River
22.) Genesee River