Michigan Website Statistics
All Bridges
- Total listed Michigan bridges: 1,106
- Bridges with photos: 632 (57.1%)
- Bridges with Street View: 385 (34.8%)
- Bridges with GPS coordinates: 1,100 (99.5%)
- Total photos: 3,815
Extant Bridges
- Extant bridges: 643 (58.1% of all)
- Bridges with photos: 329 (51.2% of extant)
- Bridges with Street View: 346 (53.8% of extant)
- Bridges with GPS coordinates: 639 (99.4% of extant)
Lost Bridges
- Lost bridges: 448 (40.5% of all)
- Bridges with photos: 271 (60.5% of lost)
- Bridges with GPS coordinates: 446 (99.6% of lost)
Oldest Listed Bridges
- Ackley Covered Bridge 22-82-01 (Wayne County, built 1832, open to traffic)
- Military Street Bridge (Older) (St. Clair County, built 1857, replaced by new bridge)
- Washington Street Bridge (Older) (Shiawassee County, built 1859, replaced by new bridge)
- Genesee Avenue Bridge (Oldest) (Saginaw County, built 1864, replaced by new bridge)
- Mottville Covered Bridge (St. Joseph County, built 1867, replaced by new bridge)
- White's Covered Bridge 22-34-01x (Ionia County, built 1867, destroyed by fire)
- ADBF - South Branch Raisin River Stone Arch (Lenawee County, built 1867, open to traffic)
- Ada Covered Bridge (Replica) 22-41-01 #2 (Kent County, built 1867/1980, open to pedestrians)
- Farrand Bridge (Old) (St. Joseph County, built 1868, replaced by new bridge)
- Constantine-Washington Street Bowstring Bridge (St. Joseph County, built 1869, replaced by new bridge)
Oldest Listed Extant Bridges
- Ackley Covered Bridge 22-82-01 (Wayne County, built 1832, open to traffic)
- ADBF - South Branch Raisin River Stone Arch (Lenawee County, built 1867, open to traffic)
- Ada Covered Bridge (Replica) 22-41-01 #2 (Kent County, built 1867/1980, open to pedestrians)
- I&L - Dickerson Creek Stone Arch Bridge (Ionia County, built 1870, open to pedestrians)
- Fallasburg Covered Bridge 22-41-02 (Kent County, built 1871, open to traffic)
- NYC - Hudson Arch Bridge (Lenawee County, built 1871, closed to all traffic)
- Towline Brook Bridge (Eaton County, built 1875, open to traffic)
- Foster Bridge (Washtenaw County, built 1876, open to traffic)
- New Richmond Bridge (Allegan County, built 1879, open to pedestrians)
- Bauer Road Bridge (Clinton County, built 1880, open to pedestrians)
By Design
- Arch: 187 (16.9%)
- Deck arch: 169 (15.3%)
- Closed-spandrel arch: 59 (5.3%)
- Iron arch: 1 (0.09%)
- Luten arch: 2 (0.2%)
- Open-spandrel arch: 8 (0.7%)
- Ribbed closed-spandrel arch: 1 (0.09%)
- Steel arch: 6 (0.5%)
- Stone arch: 26 (2.4%)
- Timber arch: 1 (0.09%)
- Pony arch: 3 (0.3%)
- Concrete pony arch: 3 (0.3%)
- Through arch: 14 (1.3%)
- Concrete through arch: 4 (0.4%)
- Steel through arch: 5 (0.5%)
- Timber through arch: 3 (0.3%)
- Beam: 175 (15.8%)
- Stringer: 126 (11.4%)
- Concrete stringer: 2 (0.2%)
- Steel stringer: 72 (6.5%)
- Timber stringer: 34 (3.1%)
- Concrete tee beam: 31 (2.8%)
- Culvert: 7 (0.6%)
- Concrete culvert: 2 (0.2%)
- Stone culvert: 1 (0.09%)
- Ferry: 8 (0.7%)
- Rigid frame: 12 (1.1%)
- Concrete rigid frame: 11 (1.0%)
- Steel rigid frame: 1 (0.09%)
- Girder: 156 (14.1%)
- Deck girder: 71 (6.4%)
- Concrete deck girder: 4 (0.4%)
- Deck plate girder: 56 (5.1%)
- Pony/through girder: 77 (7.0%)
- Concrete pony/through girder: 15 (1.4%)
- Concrete curved chord through girder: 27 (2.4%)
- Pony/through plate girder: 35 (3.2%)
- Other: 16 (1.4%)
- Slab: 14 (1.3%)
- Suspension: 6 (0.5%)
- Wire suspension: 6 (0.5%)
- Truss: 503 (45.5%)
- Bedstead pony truss: 3 (0.3%)
- Bedstead Pratt pony truss: 3 (0.3%)
- Deck truss: 32 (2.9%)
- Deck arch-truss: 1 (0.09%)
- Double-intersection Warren deck truss: 2 (0.2%)
- Howe deck truss: 1 (0.09%)
- Pratt deck truss: 8 (0.7%)
- Warren deck truss: 10 (0.9%)
- Warren deck truss with alternating verticals: 2 (0.2%)
- Warren deck truss with sub-panels: 1 (0.09%)
- Warren deck truss with all verticals: 2 (0.2%)
- Modern truss: 2 (0.2%)
- Modern pony truss: 1 (0.09%)
- Modern Pratt pony truss: 1 (0.09%)
- Modern through truss: 1 (0.09%)
- Modern bowstring through truss: 1 (0.09%)
- Pony truss: 212 (19.2%)
- Bowstring pony truss: 5 (0.5%)
- Double-intersection Warren pony truss: 2 (0.2%)
- Howe pony truss: 1 (0.09%)
- Parker pony truss: 16 (1.4%)
- Pratt pony truss: 27 (2.4%)
- Half-hip Pratt pony truss: 20 (1.8%)
- Queenpost pony truss: 1 (0.09%)
- Warren pony truss: 25 (2.3%)
- Warren pony truss with alternating verticals: 9 (0.8%)
- Warren pony truss with all verticals: 2 (0.2%)
- Through truss: 247 (22.3%)
- Baltimore through truss: 8 (0.7%)
- Bowstring through truss: 17 (1.5%)
- Brown through truss: 4 (0.4%)
- Burr arch-truss: 1 (0.09%)
- Camelback through truss: 4 (0.4%)
- Double-intersection Warren through truss: 2 (0.2%)
- Howe through truss: 4 (0.4%)
- Lattice through truss: 4 (0.4%)
- Quadrangular lattice through truss: 2 (0.2%)
- Town lattice truss: 1 (0.09%)
- Multiple Kingpost through truss: 1 (0.09%)
- Other through truss: 1 (0.09%)
- Parker through truss: 7 (0.6%)
- Pennsylvania through truss: 4 (0.4%)
- Post through truss: 2 (0.2%)
- Pratt through truss: 120 (10.8%)
- Thacher through truss: 1 (0.09%)
- Warren through truss: 22 (2.0%)
- Warren through truss with sub-panels: 2 (0.2%)
- Warren through truss with all verticals: 11 (1.0%)
- Whipple through truss: 7 (0.6%)
- Tunnel: 4 (0.4%)
- Unknown: 18 (1.6%)