US Bridges

Michigan bridges

Michigan reports 11,397 bridges and culverts across 83 counties. 1,250 (11.0%) are rated in poor condition, and 1,153 are posted with load limits or closed. The oldest structure still in the inventory dates from 1867.

Bridges
11,397
Counties
83
Good
33%
Fair
56%
Poor
11%
1,250 bridges
Average age
48.3 yrs

Find a bridge in Michigan

Type at least two characters, or pick a condition or type, to search every bridge in the state.

Counties

Circle size reflects the number of bridges

Condition

11%poor
Good33%(3,778)
Fair56%(6,369)
Poor11%(1,250)

Counties with the highest share of poor bridges

Poor-condition bridgesFairGood

Structure types

Structure typeBridgesShare
Stringer/Multi-beam or Girder4,73241.5%
Box Beam or Girders - Multiple2,55522.4%
Culvert2,03917.9%
Slab6846.0%
Tee Beam6635.8%
Box Beam or Girders - Single or Spread4423.9%
Girder and Floorbeam System710.6%
Arch - Deck680.6%
Truss - Thru460.4%
Movable - Bascule210.2%
Other180.2%
Frame180.2%
Channel Beam130.1%
Arch - Thru110.1%
Segmental Box Girder60.1%
Truss - Deck40.0%
Movable - Swing30.0%
Suspension10.0%
Movable - Lift10.0%
Orthotropic10.0%

When Michigan's bridges were built

<1900: 13 bridges13<19001900s: 62 bridges6219001910s: 83 bridges8319101920s: 416 bridges41619201930s: 559 bridges55919301940s: 332 bridges33219401950s: 849 bridges84919501960s: 2,088 bridges2.1k19601970s: 1,919 bridges1.9k19701980s: 1,389 bridges1.4k19801990s: 1,147 bridges1.1k19902000s: 1,272 bridges1.3k20002010s: 883 bridges88320102020s: 385 bridges3852020
Bridges built per decade. Year built as recorded in the inventory; reconstruction years are not included.

Busiest

  1. I-96 EB Cd over US-23 NB
    Livingston County · 516,020 vehicles/day
    Good
  2. Taft RD over US-31
    Ottawa County · 281,500 vehicles/day
    Fair
  3. I-696 over I-75 & 4 Ramps
    Oakland County · 209,200 vehicles/day
    Poor
  4. I-696 over N Service RD
    Oakland County · 209,200 vehicles/day
    Fair
  5. I-696 over N-S Service Road
    Oakland County · 192,100 vehicles/day
    Fair

Longest

  1. I-75 over Straits of Mackinac
    Emmet County · 19,248 ft
    Fair
  2. I-75 Intl Bridge over ST Mary Riv/Portage Av W
    Chippewa County · 9,280 ft
    Fair
  3. I-75 over Rouge R Dearborn ST & RR
    Wayne County · 8,627 ft
    Fair
  4. I-75 SB over Saginaw R M-13 Gtwrr
    Saginaw County · 8,085 ft
    Fair
  5. I-75 NB over Saginaw R M13 Gtwrr
    Saginaw County · 8,061 ft
    Fair

Oldest

  1. Whites Bridge RD over Flat River
    Ionia County · Built 1867
    Fair
  2. Covered Bridge RD over Flat River
    Kent County · Built 1871
    Fair
  3. Maple Road over Huron River
    Washtenaw County · Built 1876
    Fair
  4. Covered Bridge RD over ST Joseph River
    St. Joseph County · Built 1885
    Fair
  5. Second Street over Kalamazoo River
    Allegan County · Built 1886
    Fair

Newest

  1. I-96 over Bassett Drain
    Oakland County · Built 2024
    Good
  2. I-96 over Norton Creek
    Oakland County · Built 2024
    Good
  3. US-24 NB over Frank & Poet Drain
    Wayne County · Built 2024
    Good
  4. I-75 over Sulphur Creek
    Monroe County · Built 2024
    Good
  5. I-696 WB over Rouge River
    Oakland County · Built 2024
    Good

Who owns Michigan's bridges

County5,86451.5%
State4,55840.0%
City8677.6%
Federal700.6%
Local280.2%
Private40.0%
Toll Authority40.0%
Tribal10.0%
Town / Township10.0%

More Michigan facts

Total bridge length263 miles
Total deck area69,430,190 sq ft
Culverts counted as bridges2,039 (18%)
On the National Highway System2,980
Posted with load limits1,073
Closed to traffic80
Listed or eligible for the National Register195
Average daily traffic per bridge8,370 vehicles
Newest structure2024