Pennsylvania Website Statistics

All Bridges

• Total listed Pennsylvania bridges: 4,666
• Bridges with photos: 2,815 (60.3%)
• Bridges with Street View: 1,739 (37.3%)
• Bridges with GPS coordinates: 4,620 (99.0%)

• Total photos: 21,735

Extant Bridges

• Extant bridges: 3,376 (72.4% of all)
• Bridges with photos: 1,976 (58.5% of extant)
• Bridges with Street View: 1,558 (46.1% of extant)
• Bridges with GPS coordinates: 3,345 (99.1% of extant)

Lost Bridges

• Lost bridges: 1,142 (24.5% of all)
• Bridges with photos: 610 (53.4% of lost)
• Bridges with GPS coordinates: 1,128 (98.8% of lost)

Oldest Listed Bridges

1. Frankford Avenue Bridge (Philadelphia County, built 1697, under construction)
2. Old Bethelehem Road Bridge (Bucks County, built 1777, open to traffic)
3. Trinity Lane Bridge (Montgomery County, built 1789, open to traffic)
4. Skippack Bridge (Montgomery County, built 1792, open to traffic)
5. Swamp Pike Bridge (Montgomery County, built 1792, open to traffic)
6. Fisher's Lane Bridge (Philadelphia County, built 1796, open to traffic)
7. Perkiomen Bridge (Montgomery County, built 1798-1799, open to traffic)
8. Schuylkill Permanent Bridge (Philadelphia County, built 1801, unknown status)
9. Ahler's Bridge in Nockamixon Township (Bucks County, built 1804, open to traffic)
10. Schuylkill Road Bridge (Chester County, built 1804, open to traffic)

By Design

• Arch: 1,407 (30.2%)
  • Deck arch: 1,378 (29.5%)
    • Brick arch: 9 (0.2%)
    • Closed-spandrel arch: 621 (13.3%)
    • Iron arch: 2 (0.04%)
    • Open-spandrel arch: 74 (1.6%)
    • Ribbed closed-spandrel arch: 4 (0.09%)
    • Steel arch: 16 (0.3%)
    • Stone arch: 563 (12.1%)
  • Pony arch: 2 (0.04%)
    • Concrete pony arch: 1 (0.02%)
  • Through arch: 24 (0.5%)
    • Concrete through arch: 7 (0.2%)
    • Steel through arch: 15 (0.3%)
    • Timber through arch: 1 (0.02%)

• Beam: 614 (13.2%)
  • Stringer: 327 (7.0%)
    • Concrete stringer: 15 (0.3%)
    • Steel stringer: 190 (4.1%)
    • Timber stringer: 36 (0.8%)
  • Concrete tee beam: 225 (4.8%)

• Culvert: 11 (0.2%)
  • Concrete culvert: 3 (0.06%)
  • Stone culvert: 5 (0.1%)

• Ferry: 1 (0.02%)

• Rigid frame: 60 (1.3%)
  • Concrete rigid frame: 47 (1.0%)
  • Steel rigid frame: 9 (0.2%)

• Girder: 494 (10.6%)
  • Deck girder: 197 (4.2%)
    • Concrete deck girder: 11 (0.2%)
    • Deck plate girder: 160 (3.4%)
  • Pony/through girder: 215 (4.6%)
    • Concrete pony/through girder: 14 (0.3%)
    • Concrete curved chord through girder: 4 (0.09%)
    • Pony/through plate girder: 187 (4.0%)

• Other: 23 (0.5%)

• Slab: 37 (0.8%)

• Suspension: 48 (1.0%)
  • Eyebar suspension: 7 (0.2%)
  • Cable-stayed: 1 (0.02%)
  • Wire suspension: 35 (0.8%)

• Truss: 1,756 (37.6%)
  • Deck truss: 131 (2.8%)
    • Baltimore deck truss: 6 (0.1%)
    • Double-intersection Warren deck truss: 5 (0.1%)
    • Howe deck truss: 2 (0.04%)
    • K-deck truss: 2 (0.04%)
    • Lattice deck truss: 1 (0.02%)
    • Other deck truss: 1 (0.02%)
    • Pratt deck truss: 31 (0.7%)
    • Warren deck truss: 45 (1.0%)
      • Warren deck truss with alternating verticals: 3 (0.06%)
      • Warren deck truss with all verticals: 7 (0.2%)
    • Whipple deck truss: 4 (0.09%)
    • Wichert deck truss: 2 (0.04%)
  • Half-through truss: 1 (0.02%)
    • Pratt half-through truss: 1 (0.02%)
  • Modern truss: 3 (0.06%)
    • Modern pony truss: 2 (0.04%)
      • Modern bowstring pony truss: 1 (0.02%)
      • Modern Pratt pony truss: 1 (0.02%)
    • Modern through truss: 1 (0.02%)
      • Modern Warren through truss: 1 (0.02%)
  • Pony truss: 609 (13.1%)
    • Bailey pony truss: 3 (0.06%)
    • Bowstring pony truss: 14 (0.3%)
    • Double-intersection Warren pony truss: 6 (0.1%)
    • Howe pony truss: 5 (0.1%)
    • Kingpost pony truss: 4 (0.09%)
    • Lane pony truss: 1 (0.02%)
    • Lenticular pony truss: 6 (0.1%)
    • Other pony truss: 2 (0.04%)
    • Parker pony truss: 53 (1.1%)
    • Polygonal Warren pony truss: 12 (0.3%)
      • Polygonal Warren pony truss with alternating verticals: 1 (0.02%)
      • Polygonal Warren pony truss with no verticals: 2 (0.04%)
    • Pratt pony truss: 239 (5.1%)
    • Half-hip Pratt pony truss: 18 (0.4%)
    • Queenpost pony truss: 5 (0.1%)
    • Warren pony truss: 119 (2.6%)
      • Warren pony truss with alternating verticals: 4 (0.09%)
      • Warren pony truss with no verticals: 1 (0.02%)
  • Through truss: 1,005 (21.5%)
    • Baltimore through truss: 30 (0.6%)
    • Bowstring through truss: 8 (0.2%)
    • Burr arch-truss: 143 (3.1%)
    • Camelback through truss: 9 (0.2%)
    • Double-intersection Warren through truss: 7 (0.2%)
    • Hammond through truss: 1 (0.02%)
    • Haupt through truss: 1 (0.02%)
    • Howe through truss: 12 (0.3%)
    • Kingpost through truss: 12 (0.3%)
    • Lattice through truss: 25 (0.5%)
      • Quadrangular lattice through truss: 3 (0.06%)
      • Quintangular lattice through truss: 1 (0.02%)
      • Town lattice truss: 19 (0.4%)
    • Lenticular through truss: 5 (0.1%)
    • Lenticular Warren through truss: 2 (0.04%)
    • Long through truss: 2 (0.04%)
    • Multiple Kingpost through truss: 21 (0.5%)
    • Other through truss: 1 (0.02%)
    • Parker through truss: 107 (2.3%)
    • Pennsylvania through truss: 46 (1.0%)
    • Polygonal Warren through truss: 8 (0.2%)
      • Polygonal Warren through truss with sub-panels: 2 (0.04%)
      • Polygonal Warren through truss with all verticals: 2 (0.04%)
    • Post through truss: 1 (0.02%)
    • Pratt through truss: 302 (6.5%)
    • Queenpost through truss: 45 (1.0%)
    • Smith through truss: 1 (0.02%)
    • Warren through truss: 64 (1.4%)
      • Warren through truss with alternating verticals: 1 (0.02%)
      • Warren through truss with sub-panels: 4 (0.09%)
      • Warren through truss with all verticals: 12 (0.3%)
    • Whipple through truss: 22 (0.5%)

• Tunnel: 82 (1.8%)

• Unknown: 133 (2.9%)