State profile · Near national median SD

Illinois bridge safety

Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Illinois — drawn straight from the FHWA National Bridge Inventory.

27,743
Public bridges
41.2%
Good condition
7.9%
Poor condition
7.9%
Structurally deficient

Total Bridges

27,743

Public highway bridges in Illinois

Good Condition

41.2%

11,426 bridges rated 7-9

-8.8pp vs 50% benchmark

Poor Condition

7.9%

2,186 bridges rated 0-4

Structurally Deficient

7.9%

2,186 bridges flagged for repair priority

0.9pp vs national avg 7.0%

Illinois vs national bridge condition

Illinois — Good condition share 41.2%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Illinois — Structurally deficient share 26.3%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Condition Distribution

Bridge inventory deck-condition mix — Illinois (FHWA NBI)

Illinois41.185163825109036%36.47046101719353%7.879465090293047%7.879465090293047%GoodFairPoorStructurally Deficient
Bridge inventory deck-condition mix — Illinois (FHWA NBI)

Counties (102)

Adams 325 Alexander 96 Bond 165 Boone 111 Brown 71 Bureau 382 Calhoun 81 Carroll 185 Cass 77 Champaign 743 Christian 323 Clark 232 Clay 171 Clinton 187 Coles 308 Cook 2185 Crawford 196 Cumberland 169 De Witt 197 DeKalb 264 Douglas 234 DuPage 380 Edgar 278 Edwards 79 Effingham 260 Fayette 356 Ford 300 Franklin 323 Fulton 210 Gallatin 82 Greene 166 Grundy 269 Hamilton 164 Hancock 291 Hardin 58 Henderson 144 Henry 331 Iroquois 565 Jackson 235 Jasper 180 Jefferson 270 Jersey 111 Jo Daviess 198 Johnson 120 Kane 354 Kankakee 352 Kendall 133 Knox 321 LaSalle 529 Lake 286 Lawrence 183 Lee 372 Livingston 578 Logan 296 Macon 368 Macoupin 248 Madison 543 Marion 301 Marshall 153 Mason 85 Massac 138 McDonough 210 McHenry 229 McLean 624 Menard 90 Mercer 162 Monroe 130 Montgomery 261 Morgan 241 Moultrie 171 Ogle 377 Peoria 365 Perry 139 Piatt 249 Pike 338 Pope 86 Pulaski 106 Putnam 50 Randolph 155 Richland 147 Rock Island 256 Saline 176 Sangamon 480 Schuyler 121 Scott 96 Shelby 330 St. Clair 502 Stark 89 Stephenson 332 Tazewell 361 Union 192 Vermilion 515 Wabash 88 Warren 202 Washington 232 Wayne 264 White 210 Whiteside 280 Will 674 Williamson 204 Winnebago 475 Woodford 222

Illinois vs nearby ranks

Adjacent states on the structurally deficient leaderboard (lower share = better)

States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Illinois on the same metric.

44

Rhode Island

7.69% top marginal rate
Structure
Progressive
Burden @ $100K
$78

31

Nebraska

7.73% top marginal rate
Structure
Progressive
Burden @ $100K
$15,571
Selected

17

Illinois

7.88% top marginal rate
Structure
Progressive
Burden @ $100K
$27,743

25

Massachusetts

7.96% top marginal rate
Structure
Progressive
Burden @ $100K
$5,314

29

Missouri

8.53% top marginal rate
Structure
Progressive
Burden @ $100K
$24,654

Bridges Needing Most Attention in Illinois

Six lowest-condition bridges in Illinois, ranked by composite NBI rating. Each is inspected at least every 24 months.

FAS 1599

Poor

Over: DRAINAGE CANAL

2.2 MI E MEYER, Adams, IL

Built 1980 Load: 0.6 t ADT: 200

CH 15

Poor

Over: E FK MAZONRIVER

0.05 MI W CH 16, Grundy, IL

Built 1977 Load: 1.0 t ADT: 1,400

MOOSE RD - TR 240

Structurally Deficient

Over: WILSON CREEK

NE-35-T3NR2E, Fulton, IL

Built 1935 Load: 1.3 t ADT: 10

TR 10-B

Structurally Deficient

Over: KING CREEK

W EDGE OF MINERAL, Bureau, IL

Built 1899 Load: 1.6 t ADT: 10

TR-6

Structurally Deficient

Over: DRAINAGE DITCH

3.5 MI NE DIETERICH, Effingham, IL

Built 1909 Load: 1.6 t ADT: 25

TR208K(TWIN BRIDGE

Structurally Deficient

Over: BIG CREEK

NE EDGE MT ZION, Macon, IL

Built 1967 Load: 1.9 t ADT: 375

All Bridges in Illinois

TR 178

Good

Over: MID HEND CR

NE-7-T12NR1W, Warren, IL

Built 1995 Load: 32.4 t ADT: 50

FAS 1408

Good

Over: SWAN CREEK

SE-16-T8NR2W, Warren, IL

Built 1979 Load: 32.4 t ADT: 25

TR 80

Good

Over: SWAN CREEK

SW-17-T8NR2W, Warren, IL

Built 1983 Load: 32.4 t ADT: 50

FAS 450 - CH 19

Good

Over: LITTLE SWAN CREEK

NW-25-T8NR2W, Warren, IL

Built 1986 Load: 32.4 t ADT: 75

TR 102

Good

Over: BIG NEGRO CREEK

N.CTR-9-T8NR2W, Warren, IL

Built 1985 Load: 32.4 t ADT: 50

FAS 1408

Good

Over: BIG NEGRO CR

NW-10-T8NR2W, Warren, IL

Built 1987 Load: 32.4 t ADT: 50

TR 116A

Good

Over: SWAN CREEK

S.CTR-10-T8NR2W, Warren, IL

Built 2000 Load: 32.4 t ADT: 25

TR 257

Good

Over: SWAN CREEK

SE1/4-16-T8NR2W, Warren, IL

Built 2002 Load: 32.4 t ADT: 25

TR 132

Good

Over: BIG NEGRO CR

S.CTR-2-T8NR2W, Warren, IL

Built 2007 Load: 32.4 t ADT: 150

TR 94A

Good

Over: NEGRO CREEK

SW-21-T9NR2W, Warren, IL

Built 1979 Load: 32.4 t ADT: 100

TR 219

Good

Over: NEGRO CREEK

TR 219 OVER NEGRO CR, Warren, IL

Built 1982 Load: 32.4 t ADT: 75

TR 94A

Good

Over: PICAYUNE CREEK

NW-9-T9NR2W, Warren, IL

Built 1984 Load: 32.4 t ADT: 50

TR 217

Good

Over: NEGRO CREEK

S.CTR-19-T9NR2W, Warren, IL

Built 1993 Load: 32.4 t ADT: 75

TR 193

Good

Over: PICAYUNE CREEK

NW-12-T9NR2W, Warren, IL

Built 1998 Load: 32.4 t ADT: 10

TR 153

Good

Over: SLUG RUN CREEK

SW-12-T10NR2W, Warren, IL

Built 1990 Load: 32.4 t ADT: 25

FAS 414

Good

Over: BR. PICAYUNE CREEK

SE-28-T10NR2W, Warren, IL

Built 1993 Load: 32.4 t ADT: 125

TR 179

Good

Over: BRANCH PICAYUNE CR

SW 1/4-33-T10NR2W, Warren, IL

Built 2003 Load: 32.4 t ADT: 50

TR 101

Good

Over: TRIB. CEDAR CREEK

SE-15-T11NR2W, Warren, IL

Built 1991 Load: 32.4 t ADT: 450

TR 122

Good

Over: TALBOT CREEK

SE-3-T11NR2W, Warren, IL

Built 1998 Load: 32.4 t ADT: 50

TR 115

Good

Over: BR CEDAR CR

N1/2-25-T11NR2W, Warren, IL

Built 2002 Load: 32.4 t ADT: 150

TR 156

Good

Over: TALBOT CR

S.CTR-1-T11NR2W, Warren, IL

Built 2005 Load: 32.4 t ADT: 10

TR 106

Good

Over: TALBOT CR

N1/2-9-T11NR2W, Warren, IL

Built 2010 Load: 32.4 t ADT: 50

TR 122

Good

Over: MID HEND'N CREEK

SW-2-T12NR2W, Warren, IL

Built 1975 Load: 32.4 t ADT: 50

TR 134

Good

Over: HENDERSON CREEK

E1/2-14-T12NR2W, Warren, IL

Built 1977 Load: 32.4 t ADT: 35

TR 15

Good

Over: HENDERSON CREEK

E1/2-7-T12NR2W, Warren, IL

Built 1978 Load: 32.4 t ADT: 25

TR 114

Good

Over: HEND CR

E1/2-16-T12NR2W, Warren, IL

Built 1980 Load: 32.4 t ADT: 75

TR 114

Good

Over: MID HEND CR

SE-4-T12NR2W, Warren, IL

Built 1980 Load: 32.4 t ADT: 25

TR 9

Good

Over: MID HENDERSON CR

NW-11-T12NR2W, Warren, IL

Built 1985 Load: 32.4 t ADT: 25

TR 82

Good

Over: BR. CEDAR CREEK

SW-30-T12NR2W, Warren, IL

Built 1989 Load: 32.4 t ADT: 25

TR 82

Good

Over: BR OF CEDAR CREEK

SW-30-T12NR2W, Warren, IL

Built 1999 Load: 32.4 t ADT: 25

TR 35

Good

Over: BR HEND CR

NW-23-T12NR2W, Warren, IL

Built 2012 Load: 32.4 t ADT: 25

TR-70A

Good

Over: Branch Cedar Creek

2 Mi. W. of US 67, Warren, IL

Built 2017 Load: 32.4 t ADT: 35

TR 2

Good

Over: HONEY CREEK

NW-18-T8NR3W, Warren, IL

Built 1980 Load: 32.4 t ADT: 50

TR 223

Good

Over: BR ELLISON CREEK

NE-5-T8NR3W, Warren, IL

Built 1986 Load: 32.4 t ADT: 25

TR 243

Good

Over: BIG NEGRO CR

SW SEC 12 T8N R3W, Warren, IL

Built 1995 Load: 32.4 t ADT: 500

TR 24

Good

Over: BR OF ELLISON CREEK

N 1/2-20-T9NR3W, Warren, IL

Built 1988 Load: 32.4 t ADT: 25

TR 36

Good

Over: SO HEND CR

W1/2-22-T10NR3W, Warren, IL

Built 1980 Load: 32.4 t ADT: 25

TR 18

Good

Over: SOUTH FORK CREEK

SW-32-TION,R3W, Warren, IL

Built 1980 Load: 32.4 t ADT: 25

TR 163

Good

Over: S. HENDERSON CREEK

SW-13-T10NR3W, Warren, IL

Built 1984 Load: 32.4 t ADT: 25

TR 62

Good

Over: S.HENDERSON CREEK

NW-24-TIONR3W, Warren, IL

Built 1986 Load: 32.4 t ADT: 50

TR 8

Good

Over: OLD TOM CREEK

NE-7-T10N-R3W, Warren, IL

Built 1993 Load: 32.4 t ADT: 50

TR 20A

Good

Over: OLD TOM CREEK

1700 10TH ST, Warren, IL

Built 1996 Load: 32.4 t ADT: 25

TR 163

Good

Over: BR S HENDERSON CREEK

N-CTR SEC22-T10NR3W, Warren, IL

Built 2005 Load: 32.4 t ADT: 50

TR 68

Good

Over: BR OF CEDAR CREEK

N 1/2-12-T11NR3W, Warren, IL

Built 1988 Load: 32.4 t ADT: 100

TR 20

Good

Over: TRIB. JOHNS CREEK

NW-8-T11NR3W, Warren, IL

Built 1991 Load: 32.4 t ADT: 150

TR 97

Good

Over: BR. OF JOHNS CREEK

SE1/4-17-T11NR3W, Warren, IL

Built 2007 Load: 32.4 t ADT: 100

TR 73

Good

Over: Branch of Davids Crk

W.CTR-2-T11NR3W, Warren, IL

Built 2014 Load: 32.4 t ADT: 50

TR 70A

Good

Over: HEND CR

NE-1-T12NR3W, Warren, IL

Built 1980 Load: 32.4 t ADT: 50

TR 61

Good

Over: CEDAR CREEK

NE-35-T12NR3W, Warren, IL

Built 1982 Load: 32.4 t ADT: 75

TR 20

Good

Over: JOHN'S CREEK

NW-29-T12N,R3W, Warren, IL

Built 1983 Load: 32.4 t ADT: 50

Showing 21,351-21,400 of 27,743 bridges

Related

All states → | National rankings → | Understanding conditions → | SD bridges explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.

Understanding Bridge Conditions

How FHWA rates bridge condition on a 0-9 scale.

Check Your Daily Bridges

How to look up bridge condition data for bridges on your route.

Read our methodology — how this data is sourced, computed, and verified.