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

FAS 422

Good

Over: WAGNER CR

3 M NE HAMILTON, Hancock, IL

Built 2009 Load: 32.4 t ADT: 850

FAS 422

Good

Over: TRIB CHANEY CR

1.5 M NE HAMILTON, Hancock, IL

Built 2008 Load: 32.4 t ADT: 850

CO HWY 31

Good

Over: LA MOINE RIVER

9.0 MI E CARTHAGE, Hancock, IL

Built 1995 Load: 32.4 t ADT: 100

CO. HWY. 32

Good

Over: CRYSTAL GLEN CREEK

1 MI E OF WARSAW, Hancock, IL

Built 1960 Load: 32.4 t ADT: 2,200

TR 0003

Good

Over: BRANCH OF TYSON CR

.8 MI SW OF NIOTA, Hancock, IL

Built 2003 Load: 32.4 t ADT: 75

TR 3

Good

Over: BRANCH OF TYSON CR

.5 MI SW OF NIOTA, Hancock, IL

Built 2003 Load: 32.4 t ADT: 75

TR 410

Good

Over: WILLIAMS CREEK

1.5 MI SE AUGUSTA, Hancock, IL

Built 2001 Load: 32.4 t ADT: 50

TR 88

Good

Over: Little Bear Creek

0.21 mi S TR 428, Hancock, IL

Built 2015 Load: 32.4 t ADT: 50

TR 247

Good

Over: BEAR CREEK

4.0 MI SW CARTHAGE, Hancock, IL

Built 2005 Load: 32.4 t ADT: 50

TR 261

Good

Over: N FORK BEAR CREEK

1.0 MI NW BASCO, Hancock, IL

Built 1986 Load: 32.4 t ADT: 75

TR 311

Good

Over: FK OF BIG MEADOW DTH

2.2 MI SW BASCO, Hancock, IL

Built 1998 Load: 32.4 t ADT: 50

TR 311

Good

Over: BEAR CREEK

2.0 MI SW BASCO, Hancock, IL

Built 1983 Load: 32.4 t ADT: 50

TR 198

Good

Over: PRAIRE CREEK

2.0 MI E CARTHAGE, Hancock, IL

Built 2003 Load: 32.4 t ADT: 200

TR 146

Good

Over: BRANCH OF CAMP CREEK

2.7 MI S DALLAS CITY, Hancock, IL

Built 1988 Load: 32.4 t ADT: 50

TR 57

Good

Over: CAMP CREEK

1.5 MI NE COLUSA, Hancock, IL

Built 1999 Load: 32.4 t ADT: 50

TR 7

Good

Over: BRANCH SPRING CREEK

1 M W DISCO, Hancock, IL

Built 2014 Load: 32.4 t ADT: 125

TR 23

Good

Over: BRANCH OF CAMP CREEK

2.0 MI NW DURHAM, Hancock, IL

Built 1989 Load: 32.4 t ADT: 50

TR 27

Good

Over: SPRING CREEK

2.5 MI NW LAHARPE, Hancock, IL

Built 2004 Load: 32.4 t ADT: 50

TR 244

Good

Over: SPRING CREEK

2.5 MI W LAHARPE, Hancock, IL

Built 1983 Load: 32.4 t ADT: 125

TR 286A

Good

Over: LA HARPE CREEK

1 MI N OF WEBSTER, Hancock, IL

Built 1984 Load: 32.4 t ADT: 50

TR 352

Good

Over: BAPTIST CREEK

2.5 NE FOUNTAINGREEN, Hancock, IL

Built 1994 Load: 32.4 t ADT: 75

TR 366

Good

Over: Rock Creek

0.38 mi S TR 129, Hancock, IL

Built 2017 Load: 32.4 t ADT: 50

TR 163

Good

Over: FISHER CREEK

1.0 S FOUNTAIN GREEN, Hancock, IL

Built 1999 Load: 32.4 t ADT: 75

TR 213A

Good

Over: LA MOINE RIVER

4.0M NE MIDDLE CREEK, Hancock, IL

Built 2000 Load: 32.4 t ADT: 50

TR 227

Good

Over: MIDDLE CREEK

1.0 NE MIDDLE CREEK, Hancock, IL

Built 1983 Load: 32.4 t ADT: 100

TR 170

Good

Over: BIG MEADOW DITCH

3.7 MI S OF CARTHAGE, Hancock, IL

Built 1984 Load: 32.4 t ADT: 50

TR 190A

Good

Over: MIDDLE CREEK

3.0 MI SE CARTHAGE, Hancock, IL

Built 1995 Load: 32.4 t ADT: 50

TR 230

Good

Over: LITTLE CREEK

1.5 M SW MIDDLECREEK, Hancock, IL

Built 2002 Load: 32.4 t ADT: 50

TR 73

Good

Over: TRIB OF LAHARPE CRK

2.0 MI SE LAHARPE, Hancock, IL

Built 2004 Load: 32.4 t ADT: 75

TR 288

Good

Over: TRIB. LA MOINE RIVER

2.0 MI SW LAHARPE, Hancock, IL

Built 1989 Load: 32.4 t ADT: 50

TR 400

Good

Over: Voel Creek

.12 mi S TR 1B, Hancock, IL

Built 2014 Load: 32.4 t ADT: 50

TR 180

Good

Over: ROCK CREEK

1.25 M SW BURNSIDE, Hancock, IL

Built 2010 Load: 32.4 t ADT: 75

TR 206

Good

Over: DEER CREEK

1.25 NE BURNSIDE, Hancock, IL

Built 1986 Load: 32.4 t ADT: 50

TR 143

Good

Over: ROCK CREEK

2 MI SE BURNSIDE, Hancock, IL

Built 1996 Load: 32.4 t ADT: 50

FAS 1425

Good

Over: TRIB SPILLMAN CREEK

.30MI S PONTOOSUC CL, Hancock, IL

Built 1990 Load: 32.4 t ADT: 20

TR 173

Good

Over: LONG CREEK

1.0 MI S FERRIS, Hancock, IL

Built 1988 Load: 32.4 t ADT: 50

TR 185

Good

Over: CHANEY CREEK

5.0 MI WNW CARTHAGE, Hancock, IL

Built 2000 Load: 32.4 t ADT: 25

TR 158

Good

Over: BEAR CREEK

2 M SW CARTHAGE, Hancock, IL

Built 2012 Load: 32.4 t ADT: 150

TR 94 (1300E)

Good

Over: Sheridan Creek

2.38 mi S FAS 424, Hancock, IL

Built 2019 Load: 32.4 t ADT: 20

TR 166

Good

Over: ROCK CREEK

1.5 S ADRAIN, Hancock, IL

Built 1990 Load: 32.4 t ADT: 50

TR 413

Good

Over: PETIT CREEK

7 MI SE OF WARSAW, Hancock, IL

Built 1996 Load: 32.4 t ADT: 25

TR 411

Good

Over: TAYLOR SLOUGH

7.5 S WARSAW, Hancock, IL

Built 2006 Load: 32.4 t ADT: 75

TR 411

Good

Over: THE BLUFF CANAL

3.5 W TIOGA, Hancock, IL

Built 1983 Load: 32.4 t ADT: 75

TR 445

Good

Over: CO. LINE BRANCH

3.0 SW TIOGA, Hancock, IL

Built 1988 Load: 32.4 t ADT: 100

TR 90

Good

Over: TRIB OF N FK BEAR CR

3.5 W WEST POINT, Hancock, IL

Built 1984 Load: 32.4 t ADT: 50

TR 339

Good

Over: BEAR CREEK

2.0 NW WEST POINT, Hancock, IL

Built 1985 Load: 32.4 t ADT: 50

FAS 430

Good

Over: BRONSON CREEK

4.5 MI SE BENTLEY, Hancock, IL

Built 1991 Load: 32.4 t ADT: 25

TR 292

Good

Over: BRONSON CREEK

3.5 SW ST MARY, Hancock, IL

Built 1987 Load: 32.4 t ADT: 100

TR 334

Good

Over: BRONSON CREEK

2.0 SW ST MARY, Hancock, IL

Built 1981 Load: 32.4 t ADT: 25

TR 414

Good

Over: BRONSON CREEK

1.8MI N PLYMOUTH, Hancock, IL

Built 1997 Load: 32.4 t ADT: 50

Showing 17,451-17,500 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.