Washington Website Statistics

All Bridges

  • Total listed Washington bridges: 1,048
  • Bridges with photos: 673 (64.2%)
  • Bridges with Street View: 577 (55.1%)
  • Bridges with GPS coordinates: 1,042 (99.4%)

  • Total photos: 4,438

Extant Bridges

  • Extant bridges: 865 (82.5% of all)
  • Bridges with photos: 535 (61.8% of extant)
  • Bridges with Street View: 537 (62.1% of extant)
  • Bridges with GPS coordinates: 859 (99.3% of extant)

Lost Bridges

  • Lost bridges: 175 (16.7% of all)
  • Bridges with photos: 95 (54.3% of lost)
  • Bridges with GPS coordinates: 175 (100.0% of lost)

Oldest Listed Bridges

  1. Swantown Slough Bridge (Old (Thurston County, built 1869, lost)
  2. NP - Snake River Bridge (Walla Walla County, built 1884, lost)
  3. Yakima Greenway Trail - Naches River Bridge (Yakima County, built 1884, open to pedestrians)
  4. BNSF - Snake River Bridge (Franklin County, built 1884, open to traffic)
  5. BN - Buckley Viaduct (King County, built 1887, removed)
  6. BNSF - Kennewick-Pasco Bridge (Benton County, built 1887, open to traffic)
  7. SLS&E - Snohomish River Bridge (Snohomish County, built 1888, replaced by new bridge)
  8. SLS&E High Bridge (Spokane County, built 1888, removed)
  9. UP - Riparia Bridge (Whitman County, built 1889, removed)
  10. First Latah Bridge (Spokane County, built 1890, replaced by new bridge)

Oldest Listed Extant Bridges

  1. Yakima Greenway Trail - Naches River Bridge (Yakima County, built 1884, open to pedestrians)
  2. BNSF - Snake River Bridge (Franklin County, built 1884, open to traffic)
  3. BNSF - Kennewick-Pasco Bridge (Benton County, built 1887, open to traffic)
  4. NRM - South Fork Snoqualmie River Bridge (King County, built 1891, open to traffic)
  5. BNSF - Rock Island Bridge (Douglas County, built 1892, open to traffic)
  6. Yakima Valley Trolley - Naches River Bridge (Yakima County, built 1895, open to traffic)
  7. Willapa Hills Trail - Willapa River Bridge #2 (Pacific County, built 1896, open to pedestrians)
  8. NP - Wilkeson Creek Bridge (Pierce County, built 1896, abandoned)
  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: 256 (24.4%)
    • Deck arch: 232 (22.1%)
      • Closed-spandrel arch: 60 (5.7%)
      • Luten arch: 4 (0.4%)
      • Open-spandrel arch: 36 (3.4%)
      • Steel arch: 16 (1.5%)
      • Stone arch: 1 (0.10%)
      • Timber arch: 1 (0.10%)
    • Through arch: 22 (2.1%)
      • Concrete through arch: 6 (0.6%)
      • Steel through arch: 15 (1.4%)

  • Beam: 113 (10.8%)
    • Stringer: 61 (5.8%)
      • Concrete stringer: 8 (0.8%)
      • Steel stringer: 17 (1.6%)
      • Timber stringer: 27 (2.6%)
    • Concrete tee beam: 43 (4.1%)

  • Culvert: 2 (0.2%)
    • Concrete culvert: 1 (0.10%)

  • Ferry: 3 (0.3%)

  • Floating: 4 (0.4%)
    • Pontoon: 3 (0.3%)

  • Rigid frame: 9 (0.9%)
    • Concrete rigid frame: 9 (0.9%)

  • Girder: 102 (9.7%)
    • Deck girder: 62 (5.9%)
      • Concrete deck girder: 4 (0.4%)
      • Deck plate girder: 56 (5.3%)
    • Pony/through girder: 32 (3.1%)
      • Concrete pony/through girder: 3 (0.3%)
      • Pony/through plate girder: 29 (2.8%)

  • Other: 22 (2.1%)

  • Slab: 18 (1.7%)

  • Suspension: 32 (3.1%)
    • Cable-stayed: 7 (0.7%)
    • Wire suspension: 23 (2.2%)

  • Truss: 422 (40.3%)
    • Deck truss: 51 (4.9%)
      • Deck arch-truss: 1 (0.10%)
      • Baltimore deck truss: 2 (0.2%)
      • Double-intersection Warren deck truss: 1 (0.10%)
      • Howe deck truss: 3 (0.3%)
      • Pratt deck truss: 11 (1.0%)
      • Warren deck truss: 21 (2.0%)
        • Warren deck truss with all verticals: 3 (0.3%)
    • Modern truss: 2 (0.2%)
      • Modern through truss: 2 (0.2%)
        • Modern Warren through truss: 2 (0.2%)
    • Pony truss: 44 (4.2%)
      • Bailey pony truss: 3 (0.3%)
      • Miller & Borcherding pony truss: 1 (0.10%)
      • Howe pony truss: 2 (0.2%)
      • Polygonal Warren pony truss: 7 (0.7%)
        • Polygonal Warren pony truss with alternating verticals: 2 (0.2%)
      • Pratt pony truss: 6 (0.6%)
      • Warren pony truss: 13 (1.2%)
        • Warren pony truss with all verticals: 4 (0.4%)
    • Through truss: 318 (30.3%)
      • Baltimore through truss: 5 (0.5%)
      • Double-intersection Warren through truss: 2 (0.2%)
      • Howe through truss: 19 (1.8%)
      • Lattice through truss: 2 (0.2%)
        • Triple-intersection lattice through truss: 2 (0.2%)
      • Parker through truss: 29 (2.8%)
      • Pegram through truss: 1 (0.10%)
      • Pennsylvania through truss: 15 (1.4%)
      • Polygonal Warren through truss: 45 (4.3%)
        • Polygonal Warren through truss with all verticals: 7 (0.7%)
      • Pratt through truss: 72 (6.9%)
      • Queenpost through truss: 1 (0.10%)
      • Warren through truss: 80 (7.6%)
        • Warren through truss with sub-panels: 1 (0.10%)
        • Warren through truss with all verticals: 12 (1.1%)

    • Tunnel: 53 (5.1%)

    • Unknown: 12 (1.1%)