Washington Website Statistics

All Bridges

  • Total listed Washington bridges: 1,198
  • Bridges with photos: 819 (68.4%)
  • Bridges with Street View: 631 (52.7%)
  • Bridges with GPS coordinates: 1,180 (98.5%)

  • Total photos: 6,084

Extant Bridges

  • Extant bridges: 944 (78.8% of all)
  • Bridges with photos: 631 (66.8% of extant)
  • Bridges with Street View: 581 (61.5% of extant)
  • Bridges with GPS coordinates: 933 (98.8% of extant)

Lost Bridges

  • Lost bridges: 237 (19.8% of all)
  • Bridges with photos: 173 (73.0% of lost)
  • Bridges with GPS coordinates: 232 (97.9% of lost)

Oldest Listed Bridges

  1. Plante's Ferry (site) (Spokane County, built 1851, lost)
  2. Swantown Slough Bridge (Old (Thurston County, built 1869, lost)
  3. Yakima Greenway Trail - Naches River Bridge (Yakima County, built 1884, open to pedestrians)
  4. BN - Snake River Bridge (Old) (Walla Walla County, built 1884, replaced by new bridge)
  5. BN - Buckley Viaduct (King County, built 1887, removed)
  6. SLS&E - Snohomish River Bridge (Snohomish County, built 1888, replaced by new bridge)
  7. SLS&E High Bridge (Spokane County, built 1888, removed)
  8. NP - Sammamish River Bridge (Old) (King County, built 1888, replaced by new bridge)
  9. UP - Riparia Bridge (Whitman County, built 1889, removed)
  10. Avenue D Swing Bridge (1889) (Snohomish County, built 1889, replaced by new bridge)

Oldest Listed Extant Bridges

  1. Yakima Greenway Trail - Naches River Bridge (Yakima County, built 1884, open to pedestrians)
  2. NRM - South Fork Snoqualmie River Bridge (King County, built 1891, open to traffic)
  3. CWRR - Yakima River Bridge (Yakima County, built 1891, open to traffic)
  4. BNSF - Rock Island Bridge (Douglas County, built 1892, open to traffic)
  5. Yakima Valley Trolley - Naches River Bridge (Yakima County, built 1895, open to traffic)
  6. NP - Wilkeson Creek Bridge (Pierce County, built 1896, abandoned)
  7. Red Mountain Railroad Bridge (Stevens County, built 1896, abandoned)
  8. Willapa Hills Trail - Newaukum River Bridge (Lewis County, built 1896, open to pedestrians)
  9. Willapa Hills Trail - Willapa River Bridge #2 (Pacific County, built 1896, open to pedestrians)
  10. Willapa Hills Trail - Willapa River Bridge #1 (Pacific County, built 1897, open to pedestrians)

By Design

  • Arch: 263 (22.0%)
    • Deck arch: 238 (19.9%)
      • Closed-spandrel arch: 66 (5.5%)
      • Luten arch: 5 (0.4%)
      • Open-spandrel arch: 36 (3.0%)
      • Steel arch: 16 (1.3%)
      • Stone arch: 1 (0.08%)
      • Timber arch: 2 (0.2%)
    • Pony arch: 1 (0.08%)
      • Concrete pony arch: 1 (0.08%)
    • Through arch: 21 (1.8%)
      • Concrete through arch: 5 (0.4%)
      • Steel through arch: 15 (1.3%)

  • Beam: 151 (12.6%)
    • Stringer: 78 (6.5%)
      • Concrete stringer: 10 (0.8%)
      • Steel stringer: 21 (1.8%)
      • Timber stringer: 35 (2.9%)
    • Concrete tee beam: 64 (5.3%)

  • Culvert: 2 (0.2%)
    • Concrete culvert: 2 (0.2%)

  • Ferry: 6 (0.5%)

  • Floating: 4 (0.3%)
    • Pontoon: 4 (0.3%)

  • Rigid frame: 10 (0.8%)
    • Concrete rigid frame: 10 (0.8%)

  • Girder: 113 (9.4%)
    • Deck girder: 67 (5.6%)
      • Concrete deck girder: 5 (0.4%)
      • Deck plate girder: 60 (5.0%)
    • Pony/through girder: 38 (3.2%)
      • Concrete pony/through girder: 3 (0.3%)
      • Pony/through plate girder: 34 (2.8%)

  • Other: 31 (2.6%)

  • Slab: 19 (1.6%)

  • Suspension: 34 (2.8%)
    • Cable-stayed: 7 (0.6%)
    • Wire suspension: 25 (2.1%)

  • Truss: 480 (40.1%)
    • Deck truss: 54 (4.5%)
      • Deck arch-truss: 1 (0.08%)
      • Baltimore deck truss: 2 (0.2%)
      • Double-intersection Warren deck truss: 1 (0.08%)
      • Howe deck truss: 4 (0.3%)
      • Pratt deck truss: 11 (0.9%)
      • Warren deck truss: 23 (1.9%)
        • Warren deck truss with all verticals: 3 (0.3%)
    • Modern truss: 4 (0.3%)
      • Modern deck truss: 1 (0.08%)
      • Modern through truss: 3 (0.3%)
        • Modern Warren through truss: 3 (0.3%)
    • Pony truss: 53 (4.4%)
      • Bailey pony truss: 3 (0.3%)
      • Miller & Borcherding pony truss: 1 (0.08%)
      • Howe pony truss: 3 (0.3%)
      • Kingpost pony truss: 1 (0.08%)
      • Polygonal Warren pony truss: 7 (0.6%)
        • Polygonal Warren pony truss with alternating verticals: 2 (0.2%)
      • Pratt pony truss: 7 (0.6%)
      • Warren pony truss: 14 (1.2%)
        • Warren pony truss with all verticals: 5 (0.4%)
    • Through truss: 360 (30.1%)
      • Baltimore through truss: 6 (0.5%)
      • Camelback through truss: 1 (0.08%)
      • Double-intersection Warren through truss: 4 (0.3%)
      • Howe through truss: 23 (1.9%)
      • Lattice through truss: 3 (0.3%)
        • Triple-intersection lattice through truss: 2 (0.2%)
      • Parker through truss: 31 (2.6%)
      • Pegram through truss: 1 (0.08%)
      • Pennsylvania through truss: 19 (1.6%)
      • Polygonal Warren through truss: 48 (4.0%)
        • Polygonal Warren through truss with sub-panels: 1 (0.08%)
        • Polygonal Warren through truss with all verticals: 9 (0.8%)
      • Pratt through truss: 86 (7.2%)
      • Queenpost through truss: 1 (0.08%)
      • Warren through truss: 90 (7.5%)
        • Warren through truss with alternating verticals: 1 (0.08%)
        • Warren through truss with sub-panels: 1 (0.08%)
        • Warren through truss with all verticals: 15 (1.3%)

    • Tunnel: 62 (5.2%)

    • Unknown: 23 (1.9%)