Colorado Website Statistics

All Bridges

  • Total listed Colorado bridges: 593
  • Bridges with photos: 279 (47.0%)
  • Bridges with Street View: 251 (42.3%)
  • Bridges with GPS coordinates: 578 (97.5%)

  • Total photos: 1,229

Extant Bridges

  • Extant bridges: 468 (78.9% of all)
  • Bridges with photos: 225 (48.1% of extant)
  • Bridges with Street View: 222 (47.4% of extant)
  • Bridges with GPS coordinates: 465 (99.4% of extant)

Lost Bridges

  • Lost bridges: 109 (18.4% of all)
  • Bridges with photos: 46 (42.2% of lost)
  • Bridges with GPS coordinates: 99 (90.8% of lost)

Oldest Listed Bridges

  1. Georgetown Loop - Devil's Gate Trestle (Clear Creek County, built 1877, open to traffic)
  2. Royal Gorge - Hanging Bridge (Fremont County, built 1879, open to traffic)
  3. John Blair Bridge (El Paso County, built 1880, open to pedestrians)
  4. Hortense Bridge (Chaffee County, built 1880, replaced by new bridge)
  5. Romley Bridge (Chaffee County, built 1881, open to pedestrians)
  6. DSNG - Hermosa Creek Bridge (La Plata County, built 1881, open to traffic)
  7. RI - Matheson Bridge (Elbert County, built 1883, abandoned)
  8. DRGW - Elk Park Bridge (San Juan County, built 1884, abandoned)
  9. Grand Junction State Bridge (Mesa County, built 1886, replaced by new bridge)
  10. Uravan Bridge (Montrose County, built 1886, open to pedestrians)

By Design

  • Arch: 77 (13.0%)
    • Deck arch: 62 (10.5%)
      • Closed-spandrel arch: 31 (5.2%)
      • Luten arch: 2 (0.3%)
      • Open-spandrel arch: 7 (1.2%)
      • Steel arch: 5 (0.8%)
      • Stone arch: 14 (2.4%)
    • Pony arch: 2 (0.3%)
      • Timber pony arch: 2 (0.3%)
    • Through arch: 9 (1.5%)
      • Marsh arch: 1 (0.2%)
      • Steel through arch: 5 (0.8%)
      • Timber through arch: 2 (0.3%)

  • Beam: 95 (16.0%)
    • Stringer: 79 (13.3%)
      • Concrete stringer: 2 (0.3%)
      • Steel stringer: 36 (6.1%)
      • Timber stringer: 39 (6.6%)
    • Concrete tee beam: 15 (2.5%)

  • Culvert: 27 (4.6%)
    • Stone culvert: 27 (4.6%)

  • Rigid frame: 5 (0.8%)
    • Concrete rigid frame: 5 (0.8%)

  • Girder: 39 (6.6%)
    • Deck girder: 30 (5.1%)
      • Concrete deck girder: 1 (0.2%)
      • Deck plate girder: 25 (4.2%)
    • Pony/through girder: 6 (1.0%)
      • Concrete pony/through girder: 1 (0.2%)
      • Pony/through plate girder: 5 (0.8%)

  • Other: 3 (0.5%)

  • Slab: 4 (0.7%)

  • Suspension: 5 (0.8%)
    • Wire suspension: 4 (0.7%)

  • Truss: 241 (40.6%)
    • Bedstead pony truss: 1 (0.2%)
      • Bedstead Warren pony truss: 1 (0.2%)
    • Deck truss: 20 (3.4%)
      • Double-intersection Warren deck truss: 1 (0.2%)
      • Howe deck truss: 4 (0.7%)
      • Pratt deck truss: 7 (1.2%)
      • Warren deck truss: 4 (0.7%)
    • Modern truss: 1 (0.2%)
      • Modern pony truss: 1 (0.2%)
        • Modern polygonal Warren pony truss: 1 (0.2%)
    • Pony truss: 119 (20.1%)
      • Howe pony truss: 2 (0.3%)
      • Kingpost pony truss: 1 (0.2%)
      • Parker pony truss: 27 (4.6%)
      • Polygonal Warren pony truss: 7 (1.2%)
      • Pratt pony truss: 14 (2.4%)
      • Half-hip Pratt pony truss: 1 (0.2%)
      • Queenpost pony truss: 2 (0.3%)
      • Warren pony truss: 9 (1.5%)
        • Warren pony truss with alternating verticals: 1 (0.2%)
        • Warren pony truss with all verticals: 1 (0.2%)
    • Through truss: 99 (16.7%)
      • Camelback through truss: 5 (0.8%)
      • Double-intersection Warren through truss: 3 (0.5%)
      • Howe through truss: 3 (0.5%)
      • Parker through truss: 17 (2.9%)
      • Pennsylvania through truss: 5 (0.8%)
      • Polygonal Warren through truss: 2 (0.3%)
        • Polygonal Warren through truss with all verticals: 1 (0.2%)
      • Pratt through truss: 53 (8.9%)
      • Thacher through truss: 1 (0.2%)
      • Warren through truss: 4 (0.7%)

  • Tunnel: 86 (14.5%)

  • Unknown: 11 (1.9%)