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

CRYSTAL LAKE RD

Good

Over: WOODS CREEK

0.75 MI N ALGONQUIN, McHenry, IL

Built 2006 Load: 32.4 t ADT: 3,200

ACKMAN RD

Good

Over: TRIB KISHWAUKEE RVR

0.3 MI W IL 47, McHenry, IL

Built 2006 Load: 32.4 t ADT: 2,400

KREUTZER ROAD

Good

Over: S BRNCH KISHWKEE RVR

.5MI W OF IL 47, McHenry, IL

Built 2014 Load: 32.4 t ADT: 2,650

BULLVALLEY RD.

Good

Over: BOONE CREEK

.4M.W.VALLEY HILL RD, McHenry, IL

Built 1991 Load: 32.4 t ADT: 2,350

OAK STREET

Good

Over: CRYSTAL CR

.24M W OF PYOTT, McHenry, IL

Built 1993 Load: 32.4 t ADT: 1,950

Jessie Road

Good

Over: Crystal Creek

0.3 M W of Pyott Rd, McHenry, IL

Built 2014 Load: 32.4 t ADT: 450

Woods Creek Lane

Good

Over: Woods Creek

0.3 mi S of Bunker H, McHenry, IL

Built 2021 Load: 32.4 t ADT: 800

Bunker Hill Drive

Good

Over: Woods Creek

0.67 mi W Randall Road, McHenry, IL

Built 1999 Load: 32.4 t ADT: 6,500

I-39 FR RD/TR214B

Good

Over: TRIB OF SIX MILE CRK

0.5 MILE W HUDSON, McLean, IL

Built 1991 Load: 32.4 t ADT: 50

ILL 165

Good

Over: LITTLE CROOKED CREEK

8.87 MI NE OF ILL 9, McLean, IL

Built 1975 Load: 32.4 t ADT: 425

US 150 FAS 2466

Good

Over: ROCK CREEK

9.82 MI E IL 117, McLean, IL

Built 1999 Load: 32.4 t ADT: 2,200

US 136

Good

Over: STREAM

12.87 M E OF US 51, McLean, IL

Built 2010 Load: 32.4 t ADT: 1,250

FAP 693

Good

Over: DITCH

E OF BLOOMINGTON, McLean, IL

Built 2009 Load: 32.4 t ADT: 2,800

FAP 693

Good

Over: DITCH

E OF BLOOMINGTON, McLean, IL

Built 2009 Load: 32.4 t ADT: 2,800

TR 46

Good

Over: MIDDLE FORK SUGAR CR

1.5 MI SE STANFORD, McLean, IL

Built 1985 Load: 32.4 t ADT: 175

FAS 1466 CH 34

Good

Over: MDL FK SUGAR CREEK

7.5 MI NW MCLEAN, McLean, IL

Built 1989 Load: 32.4 t ADT: 600

TR 321

Good

Over: BRANCH SUGAR CREEK

1.0 MI NNE STANFORD, McLean, IL

Built 1990 Load: 32.4 t ADT: 50

FAS 492 CH 7

Good

Over: BRANCH MACKINAW RV

5.5 MI S ANCHOR, McLean, IL

Built 1983 Load: 32.4 t ADT: 550

FAS 492 CH 7

Good

Over: BRANCH MACKINAW R

3.0 MI S ANCHOR, McLean, IL

Built 1983 Load: 32.4 t ADT: 525

TR608

Good

Over: MACKINAW RIVER

3 MI E ANCHOR, McLean, IL

Built 1987 Load: 32.4 t ADT: 75

TR 221A

Good

Over: BR MACKINAW RIVER

2.5 MI WSW ANCHOR, McLean, IL

Built 1990 Load: 32.4 t ADT: 25

TR 221A

Good

Over: BR MACKINAW RIVER

2.5 MI WSW ANCHOR, McLean, IL

Built 1991 Load: 32.4 t ADT: 25

TR187

Good

Over: MACKINAW RIVER

1.0 MI SW ANCHOR, McLean, IL

Built 1996 Load: 32.4 t ADT: 75

TR 608

Good

Over: MACKINAW RIVER

3.0 MI ESE ANCHOR, McLean, IL

Built 2011 Load: 32.4 t ADT: 75

TR 490

Good

Over: SAGAMON RIVER

2.5 MI W ARROWSMITH, McLean, IL

Built 1995 Load: 32.4 t ADT: 25

FAS 487 CH 36

Good

Over: SANGAMON RIVER

2 MI SE ARROWSMITH, McLean, IL

Built 2009 Load: 32.4 t ADT: 325

TR 347

Good

Over: SANGAMON RIVER

2.0 MI W ARROWSMITH, McLean, IL

Built 1998 Load: 32.4 t ADT: 50

CH 15 FAS 491

Good

Over: SANGAMON RIVER

2 MI S OF ARROWSMITH, McLean, IL

Built 2012 Load: 32.4 t ADT: 275

CH 36 (FAS 487)

Good

Over: Sagamon River

2.0 MI SW Arrowsmith, McLean, IL

Built 2014 Load: 32.4 t ADT: 125

TR 490

Good

Over: BR SANGOMON RIVER

3.0 MI SW ARROWSMITH, McLean, IL

Built 1994 Load: 32.4 t ADT: 25

TR 556 A

Good

Over: BRANCH SALT CREEK

3.2 MI NW BELLFLOWER, McLean, IL

Built 1977 Load: 32.4 t ADT: 75

TR 545

Good

Over: SALT CREEK

2.0 MI SW BELLFLOWER, McLean, IL

Built 1978 Load: 32.4 t ADT: 75

TR 556

Good

Over: SALT CREEK

2.5 MI SW BELLFLOWER, McLean, IL

Built 1979 Load: 32.4 t ADT: 75

TR 608

Good

Over: BR LONE TREE

2.5 MI SE BELLFLOWER, McLean, IL

Built 1980 Load: 32.4 t ADT: 75

TR 602 A

Good

Over: STREAM

2.5 MI NE BELLFLOWER, McLean, IL

Built 1986 Load: 32.4 t ADT: 75

TR 602 A

Good

Over: STREAM

2.0 MI NE BELLFLOWER, McLean, IL

Built 1986 Load: 32.4 t ADT: 75

TR 556 A

Good

Over: SALT CREEK

2.5 MI NW BELLFLOWER, McLean, IL

Built 1986 Load: 32.4 t ADT: 75

TR 608

Good

Over: TRIB. LONE TREE CR.

2.5 MI E SAYBROOK, McLean, IL

Built 1992 Load: 32.4 t ADT: 75

TR 568

Good

Over: BLUERIDGE SPEC CR

3.0 MI S BELLFLOWER, McLean, IL

Built 1990 Load: 32.4 t ADT: 50

TR 570D

Good

Over: SALT CREEK

3.5MI NNW BELLFLOWER, McLean, IL

Built 1998 Load: 32.4 t ADT: 50

TR 451

Good

Over: BRANCH SALT CREEK

3.5MI NNW BELLFLOWER, McLean, IL

Built 2003 Load: 32.4 t ADT: 50

TR 608

Good

Over: BR LONE TREE CREEK

3.5 MI NE BELLFLOWER, McLean, IL

Built 2010 Load: 32.4 t ADT: 75

TR 194

Good

Over: TIMBER CREEK

1.5 MI SW 51 & 74, McLean, IL

Built 1997 Load: 32.4 t ADT: 75

OAKLAND AVE

Good

Over: GOOSE CREEK

BLOOMINGTON SEC 7, McLean, IL

Built 2003 Load: 32.4 t ADT: 1,550

TR 396

Good

Over: BRANCH CROOKED CREEK

5.0 MI E TOWANDA, McLean, IL

Built 1984 Load: 32.4 t ADT: 25

TR 183

Good

Over: BR CROOKED CREEK

5.0MI WNW COOKSVILLE, McLean, IL

Built 1986 Load: 32.4 t ADT: 500

TR 440

Good

Over: BR LITTLE CROOKED CR

1.5 MI SW COOKSVILLE, McLean, IL

Built 1989 Load: 32.4 t ADT: 50

TR 369

Good

Over: BR MONEY CREEK

4.2 MI SW COOKSVILLE, McLean, IL

Built 1993 Load: 32.4 t ADT: 50

TR 183

Good

Over: LITTLE CROOKED CREEK

3.5 MI NW COOKSVILLE, McLean, IL

Built 1997 Load: 32.4 t ADT: 500

TR 255A

Good

Over: MONEY CREEK

4.4 MI SW COOKSVILLE, McLean, IL

Built 2001 Load: 32.4 t ADT: 100

Showing 19,401-19,450 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.