Washington Website Statistics

All Bridges

  • Total listed Washington bridges: 765
  • Bridges with photos: 421 (55.0%)
  • Bridges with Street View: 410 (53.6%)
  • Bridges with GPS coordinates: 754 (98.6%)

  • Total photos: 2,213

Extant Bridges

  • Extant bridges: 685 (89.5% of all)
  • Bridges with photos: 370 (54.0% of extant)
  • Bridges with Street View: 389 (56.8% of extant)
  • Bridges with GPS coordinates: 675 (98.5% of extant)

Lost Bridges

  • Lost bridges: 76 (9.9% of all)
  • Bridges with photos: 43 (56.6% of lost)
  • Bridges with GPS coordinates: 75 (98.7% of lost)

Oldest Listed Bridges

  1. Naches River Railroad Bridge (Yakima County, built 1884, closed to all traffic)
  2. B.N.S.F. - Snake River Bridge (Franklin County, built 1884, open to traffic)
  3. B.N.S.F. - Kennewick-Pasco Bridge (Benton County, built 1887, open to traffic)
  4. Northwest Railway Museum Bridge (King County, built 1891, open to traffic)
  5. B.N.S.F. - Rock Island Bridge (Douglas County, built 1892, open to traffic)
  6. Rustic Bridge (Pierce County, built 1892, lost)
  7. Naches River Bridge (Yakima County, built 1895, open to traffic)
  8. Reinig Bridge (King County, built 1896, open to pedestrians)
  9. Willapa River Railroad Bridge (Pacific County, built 1896, open to pedestrians)
  10. Willapa River Railroad Bridge (Pacific County, built 1897, open to pedestrians)

By Design

  • Arch: 237 (31.0%)
    • Deck arch: 213 (27.8%)
      • Closed-spandrel arch: 43 (5.6%)
      • Luten arch: 4 (0.5%)
      • Open-spandrel arch: 34 (4.4%)
      • Steel arch: 14 (1.8%)
      • Stone arch: 1 (0.1%)
    • Through arch: 22 (2.9%)
      • Concrete through arch: 6 (0.8%)
      • Steel through arch: 15 (2.0%)

  • Beam: 71 (9.3%)
    • Stringer: 37 (4.8%)
      • Concrete stringer: 3 (0.4%)
      • Steel stringer: 9 (1.2%)
      • Timber stringer: 18 (2.4%)
    • Concrete tee beam: 28 (3.7%)

  • Culvert: 2 (0.3%)
    • Concrete culvert: 1 (0.1%)

  • Ferry: 3 (0.4%)

  • Floating: 3 (0.4%)
    • Pontoon: 3 (0.4%)

  • Rigid frame: 4 (0.5%)
    • Concrete rigid frame: 4 (0.5%)

  • Girder: 46 (6.0%)
    • Deck girder: 33 (4.3%)
      • Concrete deck girder: 2 (0.3%)
      • Deck plate girder: 30 (3.9%)
    • Pony/through girder: 9 (1.2%)
      • Concrete pony/through girder: 2 (0.3%)
      • Pony/through plate girder: 7 (0.9%)

  • Other: 26 (3.4%)

  • Slab: 11 (1.4%)

  • Suspension: 18 (2.4%)
    • Cable-stayed: 5 (0.7%)
    • Wire suspension: 12 (1.6%)

  • Truss: 304 (39.7%)
    • Deck truss: 35 (4.6%)
      • Pratt deck truss: 6 (0.8%)
      • Warren deck truss: 16 (2.1%)
        • Warren deck truss with all verticals: 1 (0.1%)
    • Pony truss: 39 (5.1%)
      • Bailey pony truss: 3 (0.4%)
      • Miller & Borcherding pony truss: 1 (0.1%)
      • Howe pony truss: 2 (0.3%)
      • Polygonal Warren pony truss: 7 (0.9%)
        • Polygonal Warren pony truss with alternating verticals: 2 (0.3%)
      • Pratt pony truss: 4 (0.5%)
      • Warren pony truss: 10 (1.3%)
        • Warren pony truss with all verticals: 3 (0.4%)
    • Through truss: 223 (29.2%)
      • Baltimore through truss: 3 (0.4%)
      • Double-intersection Warren through truss: 1 (0.1%)
      • Howe through truss: 8 (1.0%)
      • Lattice through truss: 1 (0.1%)
        • Triple-intersection lattice through truss: 1 (0.1%)
      • Parker through truss: 26 (3.4%)
      • Pegram through truss: 1 (0.1%)
      • Pennsylvania through truss: 14 (1.8%)
      • Polygonal Warren through truss: 44 (5.8%)
        • Polygonal Warren through truss with all verticals: 7 (0.9%)
      • Pratt through truss: 34 (4.4%)
      • Warren through truss: 66 (8.6%)
        • Warren through truss with all verticals: 9 (1.2%)

    • Tunnel: 38 (5.0%)

    • Unknown: 2 (0.3%)