Michigan Website Statistics

All Bridges

  • Total listed Michigan bridges: 597
  • Bridges with photos: 203 (34.0%)
  • Bridges with Street View: 94 (15.7%)
  • Bridges with GPS coordinates: 558 (93.5%)

  • Total photos: 1,726

Extant Bridges

  • Extant bridges: 434 (72.7% of all)
  • Bridges with photos: 139 (32.0% of extant)
  • Bridges with Street View: 89 (20.5% of extant)
  • Bridges with GPS coordinates: 403 (92.9% of extant)

Lost Bridges

  • Lost bridges: 148 (24.8% of all)
  • Bridges with photos: 62 (41.9% of lost)
  • Bridges with GPS coordinates: 144 (97.3% of lost)

Oldest Listed Bridges

  1. Ackley Covered Bridge (Wayne County, built 1832, open to traffic)
  2. Adrian Railroad Bridge (Lenawee County, built 1867, open to traffic)
  3. White's Covered Bridge (Ionia County, built 1867, open to traffic)
  4. Fallasburg Covered Bridge (Kent County, built 1871, open to traffic)
  5. Hudson Railroad Bridge (Lenawee County, built 1871, closed to all traffic)
  6. Foster Bridge (Washtenaw County, built 1876, open to traffic)
  7. New Richmond Bridge (Allegan County, built 1879, open to pedestrians)
  8. Bauer Road Bridge (Calhoun County, built 1880, open to pedestrians)
  9. Bauer Road Bridge (Clinton County, built 1880, open to pedestrians)
  10. Tallman Road Bridge (Clinton County, built 1880, replaced by new bridge)

By Design

  • Arch: 147 (24.6%)
    • Deck arch: 134 (22.4%)
      • Closed-spandrel arch: 41 (6.9%)
      • Luten arch: 1 (0.2%)
      • Open-spandrel arch: 4 (0.7%)
      • Steel arch: 4 (0.7%)
      • Stone arch: 13 (2.2%)
      • Timber arch: 1 (0.2%)
    • Pony arch: 2 (0.3%)
      • Concrete pony arch: 2 (0.3%)
    • Through arch: 10 (1.7%)
      • Concrete through arch: 5 (0.8%)
      • Steel through arch: 3 (0.5%)
      • Timber through arch: 1 (0.2%)

  • Beam: 49 (8.2%)
    • Stringer: 41 (6.9%)
      • Steel stringer: 13 (2.2%)
      • Timber stringer: 27 (4.5%)
    • Concrete tee beam: 6 (1.0%)

  • Ferry: 5 (0.8%)

  • Rigid frame: 3 (0.5%)
    • Concrete rigid frame: 3 (0.5%)

  • Girder: 68 (11.4%)
    • Deck girder: 22 (3.7%)
      • Deck plate girder: 20 (3.4%)
    • Pony/through girder: 46 (7.7%)
      • Concrete pony/through girder: 11 (1.8%)
      • Concrete curved chord through girder: 16 (2.7%)
      • Pony/through plate girder: 19 (3.2%)

  • Other: 21 (3.5%)

  • Slab: 1 (0.2%)

  • Suspension: 2 (0.3%)
    • Wire suspension: 2 (0.3%)

  • Truss: 296 (49.6%)
    • Bedstead pony truss: 2 (0.3%)
      • Bedstead Pratt pony truss: 2 (0.3%)
    • Deck truss: 22 (3.7%)
      • Deck arch-truss: 1 (0.2%)
      • Pratt deck truss: 6 (1.0%)
      • Warren deck truss: 5 (0.8%)
        • Warren deck truss with alternating verticals: 1 (0.2%)
        • Warren deck truss with all verticals: 2 (0.3%)
    • Pony truss: 158 (26.5%)
      • Bowstring pony truss: 1 (0.2%)
      • Double-intersection Warren pony truss: 2 (0.3%)
      • Parker pony truss: 8 (1.3%)
      • Pratt pony truss: 15 (2.5%)
      • Half-hip Pratt pony truss: 8 (1.3%)
      • Warren pony truss: 14 (2.3%)
        • Warren pony truss with alternating verticals: 5 (0.8%)
    • Through truss: 102 (17.1%)
      • Baltimore through truss: 6 (1.0%)
      • Brown through truss: 2 (0.3%)
      • Howe through truss: 1 (0.2%)
      • Lattice through truss: 3 (0.5%)
        • Quadrangular lattice through truss: 2 (0.3%)
      • Multiple Kingpost through truss: 1 (0.2%)
      • Parker through truss: 3 (0.5%)
      • Pennsylvania through truss: 3 (0.5%)
      • Pratt through truss: 54 (9.0%)
      • Thacher through truss: 1 (0.2%)
      • Warren through truss: 12 (2.0%)
        • Warren through truss with sub-panels: 1 (0.2%)
        • Warren through truss with all verticals: 9 (1.5%)
      • Whipple through truss: 3 (0.5%)

  • Tunnel: 2 (0.3%)

  • Unknown: 3 (0.5%)