| Name | Location | Status | Design | Year Built | Year Lost | Span Length | Total Length |
|---|
| French Creek Bridge | PA 1015 (New Lebanon Road) over French Creek | Open to traffic | Pratt through truss | 1898 | -- | -- | 275.9 ft. |
| Kidd's Mill Covered Bridge | Kidds Mill Road (TR 471) over Shenango River | Open to pedestrians only | Smith through truss | 1868 | -- | -- | 122.1 ft. |
| Little Shenango Bridge | North Race Street over Little Shenango | Open to traffic | Closed-spandrel arch | 1921 | -- | 62.0 ft. | 125.0 ft. |
| Little Shenango Creek Bridge | PA 358 (Hadley Road) over Little Shenango Creek | Open to traffic | Closed-spandrel arch | 1929 | -- | 44.9 ft. | 49.9 ft. |
| Little Shenango River Bridge | PA 4006 (Porter Road) over Little Shenango River | Open to traffic | Through truss | 1904 | -- | -- | 127.0 ft. |
| Little Shenango River Bridge | TR 740 (Mill Road) over Little Shenango River | Open to traffic | Pratt through truss | 1885 | -- | -- | 82.0 ft. |
| Nashannock Creek Bridge | TR 401 (Old Mercer Road) over Nashannock Creek | Open to traffic | Pratt through truss | 1922 | -- | 102.0 ft. | 104.0 ft. |
| Neshannock Creek Bridge | PA 2002 (Leesburg Road) over Neshannock Creek | Open to traffic | Warren pony truss | 1927 | -- | 91.9 ft. | 95.1 ft. |
| Neshannock Creek Bridge | PA 2004 (Milburn Road) over Neshannock Creek | Open to traffic | Through truss | ca. 1880 | -- | -- | 80.1 ft. |
| Perry Highway Bridge | PA 19 (Perry Highway) over Neshannock Creek | Open to traffic | Pratt through truss | 1928 | -- | 128.0 ft. | 132.9 ft. |
| Quaker Bridge | PA 4006 (Williamson Road) over Little Shenango River | Open to traffic | Pratt through truss | 1898 | -- | -- | 126.0 ft. |
| Rodgers Road Bridge | TR 871 (Rodgers Road) over Conrail | Open to traffic | Timber stringer | ca. 1920 | -- | 22.0 ft. | 109.9 ft. |
| Shenango River Bridge | TR 388 (Canal Road) over Shenango River | Open to traffic | Parker through truss | 1897 | -- | -- | 187.0 ft. |
| Shenango River Bridge | Ohl Street over Shenango River | Open to traffic | Pratt through truss | 1909 | -- | 128.0 ft. | 255.9 ft. |
| South Oakland Avenue Bridge | S. Oakland Avenue over PA 62 (Connely Blvd.) | Open to traffic | Open-spandrel arch | 1936 | -- | 185.0 ft. | 299.9 ft. |
| West Middlesex Bridge | PA 318 over Shenango River | Open to traffic | Pratt deck truss | 1941 | -- | 202.1 ft. | 717.9 ft. |
| Wolf Creek Bridge | PA 208 (North Street) over Wolf Creek | Open to traffic | Warren pony truss | 1935 | -- | -- | 111.9 ft. |
| Wolf Creek Bridge | TR 413 over Wolf Creek | Open to traffic | Polygonal Warren pony truss | 1953 | -- | -- | 94.2 ft. |
| Wolf Creek Bridge | Chestnut Street over Wolf Creek | Open to traffic | Open-spandrel arch | 1930 | -- | 91.9 ft. | 312.0 ft. |