16 bridges with vertical clearance data on 66 in Pennsylvania. Lowest: 148.0ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 148.0ft | Pa Tpk (Pa-66) | T-699 | Hempfield Twp | 1991 | Map |
| 151.6ft | Pa Tpk (Pa 66) | T-700 | Hempfield Twp | 1993 | Map |
| 161.7ft | Pa Tpk (Pa-66) | T-690 | Hempfield Twp | 1991 | Map |
| 162.1ft | Pa Tpk (Pa-66) | T-699 | Hempfield Twp | 1991 | Map |
| 162.4ft | Pa Tpk (Pa 66) Sb | T-871 | Hempfield Twp | 1993 | Map |
| 182.1ft | Pa Tpk (Pa-66) | Sr 6066 | Hempfield Township | 1993 | Map |
| 202.1ft | Pa Tpk (Pa 66) | T-871 | Hempfield Twp | 1993 | Map |
| 208.0ft | Pa Tpk (Pa-66) | T-690 | Hempfield Twp | 1991 | Map |
| 225.7ft | Pa Tpk (Pa-66) | Sr 6066 | Hempfield Township | 1993 | Map |
| 274.6ft | Pa Tpk (Pa 66) | Sr 0136 | Hempfield Township | 1991 | Map |
| 302.5ft | Pa Tpk (Pa 66) | Sr 0136 | Hempfield Township | 1991 | Map |
| 303.5ft | Pa Tpk (Pa 66) | T-700 | Hempfield Twp | 1993 | Map |
| 341.2ft | Pa Tpk (Pa 66) | Sr 0130 | Hempfield Twp | 1993 | Map |
| 392.4ft | Pa Tpk (Pa 66) | Sr 0130 | Hempfield Twp | 1993 | Map |
| 563.6ft | Pa Tpk (Pa 66) | Sr 4004, Nfs Rr | Hempfield Twp | 1992 | Map |
| 622.0ft | Pa Tpk (Pa 66) | Sr 4004, Nfs Rr | Hempfield Twp | 1991 | Map |