US Bridges

Illinois bridges

Illinois reports 26,927 bridges and culverts across 102 counties. 2,563 (9.5%) are rated in poor condition, and 937 are posted with load limits or closed. The oldest structure still in the inventory dates from 1863.

Bridges
26,927
Counties
102
Good
45%
Fair
46%
Poor
10%
2,563 bridges
Average age
45.3 yrs

Find a bridge in Illinois

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

10%poor
Good45%(12,012)
Fair46%(12,352)
Poor10%(2,563)

Counties with the highest share of poor bridges

Poor-condition bridgesFairGood

Structure types

Structure typeBridgesShare
Box Beam or Girders - Multiple9,47835.2%
Stringer/Multi-beam or Girder7,87229.2%
Culvert4,98118.5%
Slab1,9317.2%
Channel Beam1,5205.6%
Tee Beam2831.1%
Frame2330.9%
Other2190.8%
Truss - Thru1380.5%
Girder and Floorbeam System770.3%
Arch - Deck490.2%
Movable - Bascule490.2%
Box Beam or Girders - Single or Spread370.1%
Arch - Thru220.1%
Truss - Deck130.0%
Segmental Box Girder80.0%
Stayed Girder60.0%
Movable - Lift40.0%
Orthotropic30.0%
Suspension20.0%
Movable - Swing20.0%

When Illinois's bridges were built

<1900: 32 bridges32<19001900s: 638 bridges63819001910s: 198 bridges19819101920s: 624 bridges62419201930s: 919 bridges91919301940s: 533 bridges53319401950s: 1,854 bridges1.9k19501960s: 3,328 bridges3.3k19601970s: 3,390 bridges3.4k19701980s: 5,119 bridges5.1k19801990s: 4,077 bridges4.1k19902000s: 3,229 bridges3.2k20002010s: 2,328 bridges2.3k20102020s: 658 bridges6582020
Bridges built per decade. Year built as recorded in the inventory; reconstruction years are not included.

Busiest

  1. I- 90 94 Dan Ryan over Sanitary Sewer
    Cook County · 312,400 vehicles/day
    Fair
  2. I- 80 94 Kingery over Bikeway Ave (rr Ave)
    Cook County · 254,100 vehicles/day
    Fair
  3. I- 90 94 Ryan Elev over 15th to 16th Sts
    Cook County · 247,500 vehicles/day
    Fair
  4. I- 90 94 Ryan Elev over 16th to 18th Sts
    Cook County · 247,500 vehicles/day
    Fair
  5. I- 90 94 Ryan Elev over Canal to Stewart Sts
    Cook County · 245,500 vehicles/day
    Poor

Longest

  1. I-39 US 51 over Il Rv/Il 351/ Bo RR
    LaSalle County · 7,121 ft
    Fair
  2. I355 NB & SB over Desplaines River Val
    Cook County · 6,593 ft
    Fair
  3. FAI 70A over Mississippi River
    St. Clair County · 6,462 ft
    Good
  4. US 51 over Ohio River
    Alexander County · 5,865 ft
    Fair
  5. US 20 over Miss River HWY RR
    Jo Daviess County · 5,760 ft
    Fair

Oldest

  1. Old Dad Joe Trail over Bureau Creek
    Bureau County · Built 1863
    Poor
  2. Dellos RD over Aux Sable CR
    Will County · Built 1873
    Fair
  3. FAU 9187A & Met Li over Miss RIV/RR/MSS6000
    St. Clair County · Built 1874
    Fair
  4. Maeystown RD over Maeystown Creek
    Monroe County · Built 1881
    Fair
  5. FAS 600 over Bay Creek
    Pike County · Built 1885
    Fair

Newest

  1. FAI 270 EB over Mississippi River
    Madison County · Built 2024
    Good
  2. Oakton ST over I-94 Edens
    Cook County · Built 2024
    Good
  3. I 57 NB over M. Fork Big Muddy R
    Franklin County · Built 2024
    Good
  4. I 57 SB over M. Fork Big Muddy River
    Franklin County · Built 2024
    Good
  5. Washington ST over W Br Dupage River
    DuPage County · Built 2024
    Good

Who owns Illinois's bridges

Town / Township12,15445.1%
State7,92929.4%
County4,15115.4%
City2,0457.6%
Toll Authority5101.9%
Private430.2%
Railroad370.1%
Federal360.1%
Local210.1%
Unknown10.0%

More Illinois facts

Total bridge length642 miles
Total deck area148,599,299 sq ft
Culverts counted as bridges4,981 (18%)
On the National Highway System4,833
Posted with load limits828
Closed to traffic109
Listed or eligible for the National Register101
Average daily traffic per bridge5,117 vehicles
Newest structure2024