State profile · Near median Poor share

Illinois bridge safety

Condition ratings, load ratings, and Poor-condition data for every public highway bridge in Illinois, based on the FHWA National Bridge Inventory.

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

Data updated May 2026

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 whose lowest applicable component is rated 0-4

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 - Poor-condition share 26.3%
National avg

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

Condition Distribution

Illinois48.2%42.6%9.2%GoodFairPoor
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 by Poor-condition share (lower share = better)

States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below Illinois on the same metric.

RI

Rhode Island

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

NE

Nebraska

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

IL

Illinois

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

MA

Massachusetts

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

MO

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 the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.

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

Poor

Over: WILSON CREEK

NE-35-T3NR2E, Fulton, IL

Built 1935 Load: 1.3 t ADT: 10

TR 10-B

Poor

Over: KING CREEK

W EDGE OF MINERAL, Bureau, IL

Built 1899 Load: 1.6 t ADT: 10

TR-6

Poor

Over: DRAINAGE DITCH

3.5 MI NE DIETERICH, Effingham, IL

Built 1909 Load: 1.6 t ADT: 25

TR208K(TWIN BRIDGE

Poor

Over: BIG CREEK

NE EDGE MT ZION, Macon, IL

Built 1967 Load: 1.9 t ADT: 375

All Bridges in Illinois

CH45

Good

Over: STREAM

2.81 MI S US 24, Iroquois, IL

Built 1977 Load: 32.4 t ADT: 50

TR 172

Good

Over: DRAINAGE DITCH

0.6 MI S CRESCENT C1, Iroquois, IL

Built 1981 Load: 32.4 t ADT: 50

TR 219

Good

Over: SHAVETAIL CREEK

0.5 MI.W.ILL 49, Iroquois, IL

Built 1981 Load: 32.4 t ADT: 25

TR 150A

Good

Over: SHAVETAIL CREEK

3.0S 1.25W CREST CTY, Iroquois, IL

Built 1984 Load: 32.4 t ADT: 25

TR 216

Good

Over: UNNAMED TRIB

2.6 MI-S,US 24, Iroquois, IL

Built 1993 Load: 32.4 t ADT: 50

TR 184 1600 E

Good

Over: Trib. to Sugar Creek

2 mi. E. of Cresent, Iroquois, IL

Built 2016 Load: 32.4 t ADT: 75

TR 243

Good

Over: DRAINAGE DITCH

1300N, 1410E, Iroquois, IL

Built 2001 Load: 32.4 t ADT: 50

FAS 332

Good

Over: DRAINAGE DITCH

SEC12 T27N R10E 3PM, Iroquois, IL

Built 1996 Load: 32.4 t ADT: 200

CH 42

Good

Over: Prairie Creek

3 mi. E. of Danforth, Iroquois, IL

Built 2014 Load: 32.4 t ADT: 75

CH 42

Good

Over: Prairie Creek Trib

1.25 mi. N. Danforth, Iroquois, IL

Built 2014 Load: 32.4 t ADT: 75

TR 104

Good

Over: TRIB TO SPRING CREEK

3 MI SE DANFORTH, Iroquois, IL

Built 1981 Load: 32.4 t ADT: 25

TR 94A

Good

Over: PRAIRIE CREEK

1.4 MI SE DANFORTH, Iroquois, IL

Built 2001 Load: 32.4 t ADT: 25

TR 104

Good

Over: PRAIRIE CRK

2 MI E OF DANFORTH, Iroquois, IL

Built 1998 Load: 32.4 t ADT: 25

TR 95

Good

Over: PRAIRIE CR

5 MI N. OF LEONARD, Iroquois, IL

Built 2005 Load: 32.4 t ADT: 25

FAS 319/CH 8

Good

Over: PRAIRIE CREEK

2.35 MI N.OF US 24, Iroquois, IL

Built 1999 Load: 32.4 t ADT: 350

FAS 319/CH 8

Good

Over: PRAIRIE CREEK

1.5 N OF LAHOGUE, Iroquois, IL

Built 2000 Load: 32.4 t ADT: 350

CH 42

Good

Over: SPRING CREEK

4 M E OF GILMAN, Iroquois, IL

Built 2009 Load: 32.4 t ADT: 75

FAS 319 CH 8

Good

Over: PRAIRIE CREEK

.11 N US24 LAHOGUERD, Iroquois, IL

Built 2010 Load: 32.4 t ADT: 400

CH-42

Good

Over: Trib to Spring Creek

3.5 Miles E Gilman, Iroquois, IL

Built 2015 Load: 32.4 t ADT: 75

TR 10A

Good

Over: PRAIRIE CREEK

1.25S 1W LAHOGUE, Iroquois, IL

Built 1983 Load: 32.4 t ADT: 25

TR 157

Good

Over: TRIB TO SPRING CREEK

2.5E 1.0N OF GILMAN, Iroquois, IL

Built 1984 Load: 32.4 t ADT: 75

TR 551

Good

Over: TRIB TO SPRING CREEK

3E 2N OF GILMAN, Iroquois, IL

Built 1985 Load: 32.4 t ADT: 25

TR 58

Good

Over: PRAIRIE CREEK

2.75 MI W GILMAN, Iroquois, IL

Built 1989 Load: 32.4 t ADT: 25

TR-94A

Good

Over: Creek

1 E ,1N OG GILMAN, Iroquois, IL

Built 1995 Load: 32.4 t ADT: 25

TR 189

Good

Over: SPRING CREEK

5.1MI E JCT45&24, Iroquois, IL

Built 2007 Load: 32.4 t ADT: 125

FAS 331/CH 45

Good

Over: DRAINAGE DITCH

6.4 MI W OF WELLNGTN, Iroquois, IL

Built 2001 Load: 32.4 t ADT: 150

TR 180

Good

Over: FOUNTAIN CREEK

.5MIW 1.5SFOUNTAIN C, Iroquois, IL

Built 1982 Load: 32.4 t ADT: 50

TR 359

Good

Over: FOUNTAIN CREEK

T24N,R13W,2ND PM, Iroquois, IL

Built 1991 Load: 32.4 t ADT: 75

TR 359

Good

Over: WHISKEY CR

4 MI SE CISSNA PARK, Iroquois, IL

Built 2006 Load: 32.4 t ADT: 75

TR 371

Good

Over: Fountain Creek

.1mi W&4.5mi S Clay, Iroquois, IL

Built 2014 Load: 32.4 t ADT: 50

TR 363

Good

Over: FOUNTAIN CREEK

0.17 MI E OF TR 180, Iroquois, IL

Built 2005 Load: 32.4 t ADT: 150

TR 363

Good

Over: FOUNTAIN CREEK

0.06 MI E OF FAS 331, Iroquois, IL

Built 2006 Load: 32.4 t ADT: 100

FAS 335 (CH 10)

Good

Over: PIGEON CREEK TRIB

3.0 MI. E. OF LODA, Iroquois, IL

Built 2003 Load: 32.4 t ADT: 400

FAS 335 (CH 10)

Good

Over: PIGEON CREEK TRIB.

2.5 MI. EAST OF LODA, Iroquois, IL

Built 2003 Load: 32.4 t ADT: 400

FAS 335 (CH 10)

Good

Over: PIGEON CREEK TRIB.

3.5 MI E OF LODA, Iroquois, IL

Built 2003 Load: 32.4 t ADT: 375

TR 349

Good

Over: SPRING CREEK

1.25 MI W INT 57, Iroquois, IL

Built 1981 Load: 32.4 t ADT: 75

TR 357

Good

Over: SPRING CR TRIB

1.5E 1.0 N OF LODA, Iroquois, IL

Built 1986 Load: 32.4 t ADT: 25

TR 10 B

Good

Over: STREAM

1 M W, 2 M N LODA, Iroquois, IL

Built 1987 Load: 32.4 t ADT: 20

TR 349

Good

Over: UNNAMED TRIB

2 MI W. INT. 57, Iroquois, IL

Built 1992 Load: 32.4 t ADT: 75

TR 349

Good

Over: UNNAMED TRIB

1.75 M W INT 57, Iroquois, IL

Built 1992 Load: 32.4 t ADT: 75

TR 345

Good

Over: SPRING CREEK

1 MIL W US RTE 45, Iroquois, IL

Built 2001 Load: 32.4 t ADT: 25

TR 355

Good

Over: TRIB TO SPRING CRK

0000E,300N, Iroquois, IL

Built 2004 Load: 32.4 t ADT: 50

TR 22B

Good

Over: SPRING CREEK

3 MI N/1 MI E LODA, Iroquois, IL

Built 1998 Load: 32.4 t ADT: 25

TR 87(Ford Co)

Good

Over: Spring Creek

1 mi. E. of Loda, Iroquois, IL

Built 2015 Load: 32.4 t ADT: 150

TR361A

Good

Over: BRH OF FOUNTAIN CRK

3.75W 0.5S WELLINGTN, Iroquois, IL

Built 1985 Load: 32.4 t ADT: 75

TR 228

Good

Over: TRIB FOUNTAIN CREEK

T24N,R12W,2ND PM, Iroquois, IL

Built 1991 Load: 32.4 t ADT: 25

TR 228

Good

Over: UNNAMED TRIB

1.25 MI S. CH 10, Iroquois, IL

Built 1994 Load: 32.4 t ADT: 50

TR 246

Good

Over: STREAM

3.5W,.5N WELLINGTON, Iroquois, IL

Built 2000 Load: 32.4 t ADT: 50

TR 308

Good

Over: TRIB TO MUD CR

1.5 MI N. WELLINGTON, Iroquois, IL

Built 2004 Load: 32.4 t ADT: 75

TR 246

Good

Over: TRIB FOUNTAIN CREEK

3.5 M W 1/2 M S WELL, Iroquois, IL

Built 2010 Load: 32.4 t ADT: 50

Showing 17,751-17,800 of 27,743 bridges

Related

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

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). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.

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.

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.