Washington Website Statistics

All Bridges

  • Total listed Washington bridges: 1,148
  • Bridges with photos: 782 (68.1%)
  • Bridges with Street View: 606 (52.8%)
  • Bridges with GPS coordinates: 1,127 (98.2%)

  • Total photos: 5,280

Extant Bridges

  • Extant bridges: 908 (79.1% of all)
  • Bridges with photos: 564 (62.1% of extant)
  • Bridges with Street View: 562 (61.9% of extant)
  • Bridges with GPS coordinates: 893 (98.3% of extant)

Lost Bridges

  • Lost bridges: 228 (19.9% of all)
  • Bridges with photos: 140 (61.4% of lost)
  • Bridges with GPS coordinates: 222 (97.4% of lost)

Oldest Listed Bridges

  1. Plante's Ferry (site) (Spokane County, built 1851, lost)
  2. Lyons Ferry (Franklin County, built 1859, abandoned)
  3. Swantown Slough Bridge (Old (Thurston County, built 1869, lost)
  4. Yakima Greenway Trail - Naches River Bridge (Yakima County, built 1884, open to pedestrians)
  5. BN - Snake River Bridge (Old) (Walla Walla County, built 1884, replaced by new bridge)
  6. BN - Buckley Viaduct (King County, built 1887, removed)
  7. NP - Sammamish River Bridge (Old) (King County, built 1888, replaced by new bridge)
  8. SLS&E High Bridge (Spokane County, built 1888, removed)
  9. SLS&E - Snohomish River Bridge (Snohomish County, built 1888, replaced by new bridge)
  10. NP - Skagit River Bridge (Skagit County, built 1888, abandoned)

Oldest Listed Extant Bridges

  1. Lyons Ferry (Franklin County, built 1859, abandoned)
  2. Yakima Greenway Trail - Naches River Bridge (Yakima County, built 1884, open to pedestrians)
  3. NP - Skagit River Bridge (Skagit County, built 1888, abandoned)
  4. CWRR - Yakima River Bridge (Yakima County, built 1891, open to traffic)
  5. NRM - South Fork Snoqualmie River Bridge (King County, built 1891, open to traffic)
  6. BNSF - Rock Island Bridge (Douglas County, built 1892, open to traffic)
  7. Yakima Valley Trolley - Naches River Bridge (Yakima County, built 1895, open to traffic)
  8. Red Mountain Railroad Bridge (Stevens County, built 1896, abandoned)
  9. Willapa Hills Trail - Newaukum River Bridge (Lewis County, built 1896, open to pedestrians)
  10. Willapa Hills Trail - Willapa River Bridge #2 (Pacific County, built 1896, open to pedestrians)

By Design

  • Arch: 262 (22.8%)
    • Deck arch: 237 (20.6%)
      • Closed-spandrel arch: 63 (5.5%)
      • Luten arch: 4 (0.3%)
      • Open-spandrel arch: 36 (3.1%)
      • Steel arch: 16 (1.4%)
      • Stone arch: 1 (0.09%)
      • Timber arch: 2 (0.2%)
    • Through arch: 22 (1.9%)
      • Concrete through arch: 5 (0.4%)
      • Marsh arch: 1 (0.09%)
      • Steel through arch: 15 (1.3%)

  • Beam: 136 (11.8%)
    • Stringer: 74 (6.4%)
      • Concrete stringer: 9 (0.8%)
      • Steel stringer: 20 (1.7%)
      • Timber stringer: 34 (3.0%)
    • Concrete tee beam: 53 (4.6%)

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

  • Ferry: 5 (0.4%)

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

  • Rigid frame: 10 (0.9%)
    • Concrete rigid frame: 10 (0.9%)

  • Girder: 108 (9.4%)
    • Deck girder: 64 (5.6%)
      • Concrete deck girder: 4 (0.3%)
      • Deck plate girder: 58 (5.1%)
    • Pony/through girder: 36 (3.1%)
      • Concrete pony/through girder: 3 (0.3%)
      • Pony/through plate girder: 32 (2.8%)

  • Other: 23 (2.0%)

  • Slab: 19 (1.7%)

  • Suspension: 33 (2.9%)
    • Cable-stayed: 7 (0.6%)
    • Wire suspension: 24 (2.1%)

  • Truss: 464 (40.4%)
    • Deck truss: 54 (4.7%)
      • Deck arch-truss: 1 (0.09%)
      • Baltimore deck truss: 2 (0.2%)
      • Double-intersection Warren deck truss: 1 (0.09%)
      • Howe deck truss: 3 (0.3%)
      • Pratt deck truss: 11 (1.0%)
      • Warren deck truss: 23 (2.0%)
        • Warren deck truss with all verticals: 3 (0.3%)
    • Modern truss: 3 (0.3%)
      • Modern deck truss: 1 (0.09%)
      • Modern through truss: 2 (0.2%)
        • Modern Warren through truss: 2 (0.2%)
    • Pony truss: 48 (4.2%)
      • Bailey pony truss: 3 (0.3%)
      • Miller & Borcherding pony truss: 1 (0.09%)
      • Howe pony truss: 3 (0.3%)
      • Kingpost pony truss: 1 (0.09%)
      • 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: 4 (0.3%)
    • Through truss: 349 (30.4%)
      • Baltimore through truss: 6 (0.5%)
      • Camelback through truss: 1 (0.09%)
      • Double-intersection Warren through truss: 4 (0.3%)
      • Howe through truss: 23 (2.0%)
      • Lattice through truss: 3 (0.3%)
        • Triple-intersection lattice through truss: 2 (0.2%)
      • Parker through truss: 31 (2.7%)
      • Pegram through truss: 1 (0.09%)
      • Pennsylvania through truss: 18 (1.6%)
      • Polygonal Warren through truss: 47 (4.1%)
        • Polygonal Warren through truss with all verticals: 9 (0.8%)
      • Pratt through truss: 84 (7.3%)
      • Queenpost through truss: 1 (0.09%)
      • Warren through truss: 85 (7.4%)
        • Warren through truss with sub-panels: 1 (0.09%)
        • Warren through truss with all verticals: 14 (1.2%)

    • Tunnel: 60 (5.2%)

    • Unknown: 22 (1.9%)