Washington Website Statistics

All Bridges

  • Total listed Washington bridges: 1,099
  • Bridges with photos: 720 (65.5%)
  • Bridges with Street View: 594 (54.0%)
  • Bridges with GPS coordinates: 1,091 (99.3%)

  • Total photos: 4,748

Extant Bridges

  • Extant bridges: 885 (80.5% of all)
  • Bridges with photos: 563 (63.6% of extant)
  • Bridges with Street View: 551 (62.3% of extant)
  • Bridges with GPS coordinates: 877 (99.1% of extant)

Lost Bridges

  • Lost bridges: 204 (18.6% of all)
  • Bridges with photos: 135 (66.2% of lost)
  • Bridges with GPS coordinates: 204 (100.0% of lost)

Oldest Listed Bridges

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

Oldest Listed Extant Bridges

  1. BNSF - Snake River Bridge (Franklin County, built 1884, open to traffic)
  2. Yakima Greenway Trail - Naches River Bridge (Yakima County, built 1884, open to pedestrians)
  3. BNSF - Kennewick-Pasco Bridge (Benton County, built 1887, open to traffic)
  4. NP - Skagit River Bridge (Skagit County, built 1888, abandoned)
  5. NRM - South Fork Snoqualmie River Bridge (King County, built 1891, open to traffic)
  6. CWRR - Yakima River Bridge (Yakima County, built 1891, open to traffic)
  7. BNSF - Rock Island Bridge (Douglas County, built 1892, open to traffic)
  8. Yakima Valley Trolley - Naches River Bridge (Yakima County, built 1895, open to traffic)
  9. Red Mountain Railroad Bridge (Stevens County, built 1896, abandoned)
  10. Willapa Hills Trail - Newaukum River Bridge (Lewis County, built 1896, open to pedestrians)

By Design

  • Arch: 258 (23.5%)
    • Deck arch: 234 (21.3%)
      • Closed-spandrel arch: 61 (5.6%)
      • Luten arch: 4 (0.4%)
      • Open-spandrel arch: 36 (3.3%)
      • Steel arch: 16 (1.5%)
      • Stone arch: 1 (0.09%)
      • Timber arch: 2 (0.2%)
    • Pony arch: 1 (0.09%)
      • Concrete pony arch: 1 (0.09%)
    • Through arch: 21 (1.9%)
      • Concrete through arch: 5 (0.5%)
      • Steel through arch: 15 (1.4%)

  • Beam: 126 (11.5%)
    • Stringer: 69 (6.3%)
      • Concrete stringer: 9 (0.8%)
      • Steel stringer: 19 (1.7%)
      • Timber stringer: 31 (2.8%)
    • Concrete tee beam: 48 (4.4%)

  • Culvert: 2 (0.2%)
    • Concrete culvert: 1 (0.09%)

  • Ferry: 3 (0.3%)

  • Floating: 4 (0.4%)
    • Pontoon: 4 (0.4%)

  • Rigid frame: 9 (0.8%)
    • Concrete rigid frame: 9 (0.8%)

  • Girder: 106 (9.6%)
    • Deck girder: 63 (5.7%)
      • Concrete deck girder: 4 (0.4%)
      • Deck plate girder: 57 (5.2%)
    • Pony/through girder: 35 (3.2%)
      • Concrete pony/through girder: 3 (0.3%)
      • Pony/through plate girder: 32 (2.9%)

  • Other: 23 (2.1%)

  • Slab: 19 (1.7%)

  • Suspension: 33 (3.0%)
    • Cable-stayed: 7 (0.6%)
    • Wire suspension: 24 (2.2%)

  • Truss: 447 (40.7%)
    • Deck truss: 53 (4.8%)
      • 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 (2.1%)
        • 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: 45 (4.1%)
      • Bailey pony truss: 3 (0.3%)
      • Miller & Borcherding pony truss: 1 (0.09%)
      • Howe pony truss: 2 (0.2%)
      • Polygonal Warren pony truss: 8 (0.7%)
        • Polygonal Warren pony truss with alternating verticals: 3 (0.3%)
      • Pratt pony truss: 6 (0.5%)
      • Warren pony truss: 13 (1.2%)
        • Warren pony truss with all verticals: 4 (0.4%)
    • Through truss: 338 (30.8%)
      • Baltimore through truss: 5 (0.5%)
      • Camelback through truss: 1 (0.09%)
      • Double-intersection Warren through truss: 4 (0.4%)
      • Howe through truss: 20 (1.8%)
      • Lattice through truss: 3 (0.3%)
        • Triple-intersection lattice through truss: 2 (0.2%)
      • Parker through truss: 29 (2.6%)
      • Pegram through truss: 1 (0.09%)
      • Pennsylvania through truss: 17 (1.5%)
      • Polygonal Warren through truss: 46 (4.2%)
        • Polygonal Warren through truss with all verticals: 8 (0.7%)
      • Pratt through truss: 84 (7.6%)
      • Queenpost through truss: 1 (0.09%)
      • Warren through truss: 83 (7.6%)
        • Warren through truss with sub-panels: 1 (0.09%)
        • Warren through truss with all verticals: 13 (1.2%)

    • Tunnel: 58 (5.3%)

    • Unknown: 11 (1.0%)