Iowa Website Statistics

All Bridges

  • Total listed Iowa bridges: 5,748
  • Bridges with photos: 2,907 (50.6%)
  • Bridges with Street View: 922 (16.0%)
  • Bridges with GPS coordinates: 5,725 (99.6%)

  • Total photos: 27,705

Extant Bridges

  • Extant bridges: 3,291 (57.3% of all)
  • Bridges with photos: 1,890 (57.4% of extant)
  • Bridges with Street View: 797 (24.2% of extant)
  • Bridges with GPS coordinates: 3,287 (99.9% of extant)

Lost Bridges

  • Lost bridges: 2,350 (40.9% of all)
  • Bridges with photos: 986 (42.0% of lost)
  • Bridges with GPS coordinates: 2,335 (99.4% of lost)

Oldest Listed Bridges

  1. Elkader Truesdell Bridge (Clayton County, built 1851, replaced by new bridge)
  2. CN - Malone Creek Stone Arch (Buchanan County, built 1853, open to traffic)
  3. Oxford Mills Bridge (Jones County, built 1857, replaced by new bridge)
  4. Market Run Stone Arch (Johnson County, built 1857, destroyed by flood)
  5. Rockford Bridge (1st) (Floyd County, built 1858, unknown status)
  6. Court Avenue Bridge (1st) (Polk County, built 1858, replaced by new bridge)
  7. Kendall Bridge (Older) (Carroll County, built 1860, replaced by new bridge)
  8. Burlington Street Bridge (Johnson County, built 1860, replaced by new bridge)
  9. Mederville Covered Bridge (Clayton County, built 1860, replaced by new bridge)
  10. Raccoon River Covered Bridge (1st) (Polk County, built 1862, replaced by new bridge)

Oldest Listed Extant Bridges

  1. CN - Malone Creek Stone Arch (Buchanan County, built 1853, open to traffic)
  2. IAIS - Tributary of Fourmile Creek Arch (Polk County, built 1867, open to traffic)
  3. Liberty Trail Bridge (Buchanan County, built 1870, open to pedestrians)
  4. Wilcox Game Preserve Covered Bridge (Marion County, built 1870, abandoned)
  5. Imes Covered Bridge (Madison County, built 1870, open to pedestrians)
  6. RI - Crow Creek Arch Bridge (Jefferson County, built 1871, abandoned)
  7. DM&E - Waterworks Trestle (Scott County, built 1871, open to traffic)
  8. Cutler-Donahoe Covered Bridge (Madison County, built 1871, open to pedestrians)
  9. Green Mill Ford Bridge (Bremer County, built 1872, closed to all traffic)
  10. Bergfeld Pond Bridge (Dubuque County, built 1872, open to pedestrians)

By Design

  • Arch: 432 (7.5%)
    • Deck arch: 363 (6.3%)
      • Brick arch: 5 (0.09%)
      • Closed-spandrel arch: 221 (3.8%)
      • Luten arch: 8 (0.1%)
      • Open-spandrel arch: 23 (0.4%)
      • Steel arch: 2 (0.03%)
      • Stone arch: 88 (1.5%)
    • Pony arch: 3 (0.05%)
      • Concrete pony arch: 1 (0.02%)
      • Timber pony arch: 1 (0.02%)
    • Through arch: 29 (0.5%)
      • Concrete through arch: 3 (0.05%)
      • Marsh arch: 13 (0.2%)
      • Steel through arch: 12 (0.2%)
      • Timber through arch: 1 (0.02%)

  • Beam: 917 (16.0%)
    • Stringer: 888 (15.4%)
      • Concrete stringer: 42 (0.7%)
      • Steel stringer: 480 (8.4%)
      • Timber stringer: 304 (5.3%)
    • Concrete tee beam: 23 (0.4%)

  • Culvert: 172 (3.0%)
    • Concrete culvert: 128 (2.2%)
    • Stone culvert: 17 (0.3%)

  • Ferry: 3 (0.05%)

  • Floating: 3 (0.05%)
    • Pontoon: 3 (0.05%)

  • Rigid frame: 27 (0.5%)
    • Concrete rigid frame: 26 (0.5%)
    • Steel rigid frame: 1 (0.02%)

  • Girder: 776 (13.5%)
    • Deck girder: 465 (8.1%)
      • Concrete deck girder: 49 (0.9%)
      • Deck plate girder: 412 (7.2%)
    • Pony/through girder: 260 (4.5%)
      • Concrete pony/through girder: 12 (0.2%)
      • Pony/through plate girder: 241 (4.2%)

  • Other: 14 (0.2%)

  • Slab: 146 (2.5%)

  • Suspension: 22 (0.4%)
    • Cable-stayed: 3 (0.05%)
    • Wire suspension: 17 (0.3%)

  • Truss: 2,997 (52.1%)
    • Bedstead pony truss: 11 (0.2%)
      • Bedstead double-intersection Warren pony truss: 1 (0.02%)
      • Bedstead Pratt pony truss: 9 (0.2%)
      • Bedstead Warren pony truss: 1 (0.02%)
    • Deck truss: 46 (0.8%)
      • Baltimore deck truss: 3 (0.05%)
      • Double-intersection Warren deck truss: 5 (0.09%)
      • Howe deck truss: 1 (0.02%)
      • K-deck truss: 1 (0.02%)
      • Lattice deck truss: 1 (0.02%)
      • Other deck truss: 1 (0.02%)
      • Pratt deck truss: 14 (0.2%)
      • Warren deck truss: 13 (0.2%)
        • Warren deck truss with sub-panels: 2 (0.03%)
        • Warren deck truss with all verticals: 1 (0.02%)
    • Half-through truss: 1 (0.02%)
    • Modern truss: 8 (0.1%)
      • Modern pony truss: 5 (0.09%)
        • Modern bowstring pony truss: 1 (0.02%)
        • Modern Pratt pony truss: 3 (0.05%)
        • Modern Warren pony truss: 1 (0.02%)
      • Modern through truss: 3 (0.05%)
        • Modern polygonal Warren through truss: 1 (0.02%)
        • Modern Pratt through truss: 1 (0.02%)
        • Modern Warren through truss: 1 (0.02%)
    • Pony truss: 1,730 (30.1%)
      • Bailey pony truss: 2 (0.03%)
      • Bowstring pony truss: 28 (0.5%)
      • Double-intersection Warren pony truss: 11 (0.2%)
      • Howe pony truss: 4 (0.07%)
      • Kingpost pony truss: 11 (0.2%)
      • Other pony truss: 2 (0.03%)
      • Parker pony truss: 1 (0.02%)
      • Polygonal Warren pony truss: 5 (0.09%)
        • Polygonal Warren pony truss with alternating verticals: 1 (0.02%)
        • Polygonal Warren pony truss with all verticals: 3 (0.05%)
      • Pratt pony truss: 130 (2.3%)
      • Half-hip Pratt pony truss: 20 (0.3%)
      • Queenpost pony truss: 16 (0.3%)
      • Truesdell pony truss: 1 (0.02%)
      • Warren pony truss: 299 (5.2%)
        • Warren pony truss with alternating verticals: 25 (0.4%)
        • Warren pony truss with no verticals: 2 (0.03%)
        • Warren pony truss with all verticals: 146 (2.5%)
    • Through truss: 1,185 (20.6%)
      • Baltimore through truss: 6 (0.1%)
      • Bollman through truss: 1 (0.02%)
      • Bowstring through truss: 71 (1.2%)
      • Burr arch-truss: 1 (0.02%)
      • Camelback through truss: 19 (0.3%)
      • Double-intersection Warren through truss: 2 (0.03%)
      • Howe through truss: 20 (0.3%)
      • Kingpost through truss: 1 (0.02%)
      • Lattice through truss: 51 (0.9%)
        • Quadrangular lattice through truss: 31 (0.5%)
        • Town lattice truss: 13 (0.2%)
      • Other through truss: 2 (0.03%)
      • Parker through truss: 61 (1.1%)
      • Pennsylvania through truss: 26 (0.5%)
      • Polygonal Warren through truss: 6 (0.1%)
        • Polygonal Warren through truss with sub-panels: 2 (0.03%)
      • Post through truss: 2 (0.03%)
      • Pratt through truss: 488 (8.5%)
      • Thacher through truss: 5 (0.09%)
      • Warren through truss: 60 (1.0%)
        • Warren through truss with sub-panels: 14 (0.2%)
        • Warren through truss with all verticals: 8 (0.1%)
      • Whipple through truss: 33 (0.6%)

  • Tunnel: 1 (0.02%)

  • Unknown: 238 (4.1%)