Website Statistics

All Bridges

Total listed bridges: 40,712
Bridges with photos: 16,842 (41.4%)
Bridges with Street View: 8,188 (20.1%)
Bridges with GPS coordinates: 38,957 (95.7%)
Total photos: 126,835

Extant Bridges

Extant bridges: 30,423 (74.7% of all)
Bridges with photos: 13,507 (44.4% of extant)
Bridges with Street View: 7,373 (24.2% of extant)
Bridges with GPS coordinates: 29,404 (96.7% of extant)

Lost Bridges

Lost bridges: 9,271 (22.8% of all)
Bridges with photos: 2,819 (30.4% of lost)
Bridges with GPS coordinates: 8,681 (93.6% of lost)

Oldest Listed Bridges

Frankford Avenue Bridge (Philadelphia County, Pennsylvania) - Built 1697, open to traffic
Old Stone Bridge (Somerset County, New Jersey) - Built 1731, unknown status
Choate Bridge (Essex County, Massachusetts) - Built 1764, open to traffic
Adams Street Bridge (Suffolk County, Massachusetts) - Built 1765, open to traffic
Old Bethelehem Road Bridge Pleasant Valley, PA (Bucks County, Pennsylvania) - Built 1777, open to traffic
Trinity Lane Bridge Upper Merion Twp, PA (Montgomery County, Pennsylvania) - Built 1789, open to traffic
Swamp Pike Bridge (Montgomery County, Pennsylvania) - Built 1792, open to traffic
Skippack Bridge (Montgomery County, Pennsylvania) - Built 1792, open to traffic
Fisher's Lane Bridge (Philadelphia County, Pennsylvania) - Built 1796, open to traffic
Perkiomen Bridge Collegeville, PA (Montgomery County, Pennsylvania) - Built 1798-1799, open to traffic

By Design

Arch: 9,006 (22.1%)
- Deck arch: 8,212 (20.2%)
  - Brick arch: 24 (0.06%)
  - Closed-spandrel arch: 2,417 (5.9%)
  - Iron arch: 4 (0.010%)
  - Luten arch: 46 (0.1%)
  - Open-spandrel arch: 548 (1.3%)
  - Ribbed closed-spandrel arch: 18 (0.04%)
  - Steel arch: 290 (0.7%)
  - Stone arch: 1,784 (4.4%)
  - Timber arch: 7 (0.02%)
- Pony arch: 36 (0.09%)
  - Concrete pony arch: 31 (0.08%)
  - Timber pony arch: 2 (0.005%)
- Through arch: 328 (0.8%)
  - Concrete through arch: 107 (0.3%)
  - Iron through arch: 1 (0.002%)
  - Marsh arch: 35 (0.09%)
  - Network arch: 2 (0.005%)
  - Steel through arch: 160 (0.4%)
  - Timber through arch: 3 (0.007%)
Beam: 4,429 (10.9%)
- Stringer: 3,488 (8.6%)
  - Concrete stringer: 192 (0.5%)
  - Steel stringer: 1,671 (4.1%)
  - Timber stringer: 1,328 (3.3%)
- Concrete tee beam: 803 (2.0%)
Culvert: 341 (0.8%)
- Concrete culvert: 54 (0.1%)
- Stone culvert: 199 (0.5%)
Ferry: 50 (0.1%)
Floating: 13 (0.03%)
- Pontoon: 13 (0.03%)
Rigid frame: 156 (0.4%)
- Concrete rigid frame: 128 (0.3%)
- Steel rigid frame: 19 (0.05%)
Girder: 1,949 (4.8%)
- Deck girder: 992 (2.4%)
  - Concrete deck girder: 212 (0.5%)
  - Deck plate girder: 706 (1.7%)
- Pony/through girder: 654 (1.6%)
  - Concrete pony/through girder: 114 (0.3%)
  - Concrete curved chord through girder: 50 (0.1%)
  - Pony/through plate girder: 465 (1.1%)
Other: 907 (2.2%)
Slab: 483 (1.2%)
Suspension: 310 (0.8%)
- Eyebar suspension: 9 (0.02%)
- Self-anchor suspension: 4 (0.010%)
- Cable-stayed: 48 (0.1%)
- Wire suspension: 231 (0.6%)
Truss: 22,299 (54.8%)
- Bedstead pony truss: 372 (0.9%)
  - Bedstead double-intersection Warren pony truss: 64 (0.2%)
  - Bedstead Pratt pony truss: 233 (0.6%)
  - Bedstead Warren pony truss: 71 (0.2%)
- Deck truss: 804 (2.0%)
  - Deck arch-truss: 2 (0.005%)
  - Bailey deck truss: 13 (0.03%)
  - Baltimore deck truss: 10 (0.02%)
  - Canticrete deck truss: 2 (0.005%)
  - Double-intersection Warren deck truss: 11 (0.03%)
  - Fink deck truss: 1 (0.002%)
  - Howe deck truss: 9 (0.02%)
  - K-deck truss: 1 (0.002%)
  - Lattice deck truss: 6 (0.01%)
  - Lenticular deck truss: 1 (0.002%)
  - Pegram deck truss: 1 (0.002%)
  - Pratt deck truss: 133 (0.3%)
  - Scissors deck truss: 1 (0.002%)
  - Warren deck truss: 260 (0.6%)
    - Warren deck truss with alternating verticals: 2 (0.005%)
    - Warren deck truss with no verticals: 1 (0.002%)
    - Warren deck truss with sub-panels: 1 (0.002%)
    - Warren deck truss with all verticals: 12 (0.03%)
  - Whipple deck truss: 5 (0.01%)
  - Wichert deck truss: 3 (0.007%)
- Pony truss: 12,229 (30.0%)
  - Bailey pony truss: 54 (0.1%)
  - Miller & Borcherding pony truss: 17 (0.04%)
  - Bowstring pony truss: 106 (0.3%)
  - Double-intersection Warren pony truss: 55 (0.1%)
  - Eiffel pony truss: 1 (0.002%)
  - Howe pony truss: 28 (0.07%)
  - Kingpost pony truss: 45 (0.1%)
  - Lane pony truss: 3 (0.007%)
  - Lattice pony truss: 6 (0.01%)
  - Lenticular pony truss: 27 (0.07%)
  - Parker pony truss: 299 (0.7%)
  - Polygonal Warren pony truss: 406 (1.0%)
    - Polygonal Warren pony truss with alternating verticals: 50 (0.1%)
    - Polygonal Warren pony truss with no verticals: 3 (0.007%)
    - Polygonal Warren pony truss with all verticals: 12 (0.03%)
  - Post pony truss: 2 (0.005%)
  - Pratt pony truss: 1,659 (4.1%)
  - Half-hip Pratt pony truss: 256 (0.6%)
  - Queenpost pony truss: 48 (0.1%)
  - Vierendeel pony truss: 3 (0.007%)
  - Warren pony truss: 1,678 (4.1%)
    - Warren pony truss with alternating verticals: 83 (0.2%)
    - Warren pony truss with no verticals: 14 (0.03%)
    - Warren pony truss with all verticals: 88 (0.2%)
- Through truss: 8,474 (20.8%)
  - Baltimore through truss: 122 (0.3%)
  - Bollman through truss: 2 (0.005%)
  - Bowstring through truss: 70 (0.2%)
  - Brown through truss: 2 (0.005%)
  - Burr arch-truss: 213 (0.5%)
  - Camelback through truss: 211 (0.5%)
  - Childs through truss: 8 (0.02%)
  - Double-intersection Warren through truss: 65 (0.2%)
  - Eiffel through truss: 1 (0.002%)
  - Fink through truss: 2 (0.005%)
  - Hammond through truss: 1 (0.002%)
  - Haupt through truss: 1 (0.002%)
  - Howe through truss: 194 (0.5%)
  - Inverted bowstring through truss: 4 (0.010%)
  - K-Parker through truss: 64 (0.2%)
  - K-Truss through truss: 8 (0.02%)
  - Kingpost through truss: 37 (0.09%)
  - Lattice through truss: 207 (0.5%)
    - Quadrangular lattice through truss: 44 (0.1%)
    - Quintangular lattice through truss: 1 (0.002%)
    - Town lattice truss: 122 (0.3%)
    - Triple-intersection lattice through truss: 13 (0.03%)
  - Lenticular through truss: 20 (0.05%)
  - Lenticular Warren through truss: 2 (0.005%)
  - Long through truss: 20 (0.05%)
  - Multiple Kingpost through truss: 87 (0.2%)
  - Paddleford through truss: 19 (0.05%)
  - Parker through truss: 881 (2.2%)
  - Partridge through truss: 6 (0.01%)
  - Pegram through truss: 10 (0.02%)
  - Pennsylvania through truss: 277 (0.7%)
  - Polygonal Warren through truss: 270 (0.7%)
    - Polygonal Warren through truss with alternating verticals: 17 (0.04%)
    - Polygonal Warren through truss with sub-panels: 4 (0.010%)
    - Polygonal Warren through truss with all verticals: 31 (0.08%)
  - Post through truss: 6 (0.01%)
  - Pratt through truss: 2,806 (6.9%)
  - Queenpost through truss: 90 (0.2%)
  - Smith through truss: 26 (0.06%)
  - Stearns through truss: 2 (0.005%)
  - Thacher through truss: 6 (0.01%)
  - Waddell "A" through truss: 3 (0.007%)
  - Warren through truss: 757 (1.9%)
    - Warren through truss with alternating verticals: 12 (0.03%)
    - Warren through truss with no verticals: 7 (0.02%)
    - Warren through truss with sub-panels: 25 (0.06%)
    - Warren through truss with all verticals: 79 (0.2%)
  - Wheeler through truss: 1 (0.002%)
  - Whipple through truss: 133 (0.3%)
Tunnel: 337 (0.8%)
Unknown: 432 (1.1%)