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 2887 (IL 37)

Good

Over: TRIB TO LAKE CREEK

0.06 M N STOTLAR RD, Williamson, IL

Built 2002 Load: 32.4 t ADT: 8,000

TR 505

Good

Over: WOLF CREEK

1.5 MI NW PULLEYS M., Williamson, IL

Built 1977 Load: 32.4 t ADT: 175

TR 505

Good

Over: MIDDLE WOLF CREEK

2 MI NW PULLEYS MILL, Williamson, IL

Built 1977 Load: 32.4 t ADT: 175

TR 603

Good

Over: SUGAR CREEK

1 MI E CREAL SPRINGS, Williamson, IL

Built 1977 Load: 32.4 t ADT: 125

TR 440

Good

Over: S FORK SALINE RIVER

4 MI SE OF MARION, Williamson, IL

Built 1978 Load: 32.4 t ADT: 125

TR 606

Good

Over: PRAIRIE CREEK

4 MI SE CORINTH, Williamson, IL

Built 1978 Load: 32.4 t ADT: 125

CH 14

Good

Over: LAKE CREEK

.2 MI E JOHNSTON CIT, Williamson, IL

Built 1980 Load: 32.4 t ADT: 450

TR-4

Good

Over: Stream

SALINE COUNTY LINE, Williamson, IL

Built 1982 Load: 32.4 t ADT: 100

TR-573

Good

Over: Cana Creek

2.5 MILES NW CREAL, Williamson, IL

Built 1981 Load: 32.4 t ADT: 200

CH 4

Good

Over: BEAR CREEK

2 MILES E HERRIN, Williamson, IL

Built 1983 Load: 32.4 t ADT: 2,150

TR 548B

Good

Over: CRAB ORCHARD CREEK

SE EDGE OF PITTSBURG, Williamson, IL

Built 1983 Load: 32.4 t ADT: 125

TR-167

Good

Over: Brushy Creek

5 MILE E PITTSBURG, Williamson, IL

Built 1983 Load: 32.4 t ADT: 75

TR 143

Good

Over: LAKE CREEK

1 MI N OF PITTSBURG, Williamson, IL

Built 1987 Load: 32.4 t ADT: 75

TR 612

Good

Over: BRUSHY CREEK

5 MI.EAST PITTSBURG, Williamson, IL

Built 1985 Load: 32.4 t ADT: 50

TR 202

Good

Over: NAMELESS-STREAM

3.5 MI WEST MARION, Williamson, IL

Built 1984 Load: 32.4 t ADT: 50

FAS 2903-CH 4

Good

Over: UNNAMED STREAM

1 MI. EAST OF HERRIN, Williamson, IL

Built 1987 Load: 32.4 t ADT: 2,050

TR 23

Good

Over: LAKE CREEK

2 MILES NEHERRIN, Williamson, IL

Built 1985 Load: 32.4 t ADT: 275

TR-606

Good

Over: Brushy Creek

4 MILES SE CORINTH, Williamson, IL

Built 1985 Load: 32.4 t ADT: 125

FAS 876

Good

Over: POND CREEK

0.5M SW FREEMAN SPUR, Williamson, IL

Built 1989 Load: 32.4 t ADT: 1,900

TR 604

Good

Over: PRAIRIE CREEK

2 MI E CORINTH, Williamson, IL

Built 1992 Load: 32.4 t ADT: 50

FAS 903-CH 2

Good

Over: PRAIRIE CREEK

4 MI E OF CORINTH, Williamson, IL

Built 1991 Load: 32.4 t ADT: 400

TWP ROAD 652

Good

Over: SUGAR CREEK

3 MI NE CREAL SPRING, Williamson, IL

Built 1989 Load: 32.4 t ADT: 75

TR 605

Good

Over: CANA CREEK

0.5 M NW CREALSPGS, Williamson, IL

Built 1990 Load: 32.4 t ADT: 100

TR 315

Good

Over: BRIAR CREEK

5M SE CRAB ORCHARD, Williamson, IL

Built 1991 Load: 32.4 t ADT: 150

FAS 1900-CH 25

Good

Over: CANEY BRANCH

7 MI S CARTERVILLE, Williamson, IL

Built 1991 Load: 32.4 t ADT: 1,950

TR 610

Good

Over: BRUSHY CREEK

3 MI SE CORINTH, Williamson, IL

Built 1992 Load: 32.4 t ADT: 10

TR 432

Good

Over: S FORK SALINE RIVER

4 MI SE MARION, Williamson, IL

Built 1992 Load: 32.4 t ADT: 125

TR 245

Good

Over: ICGRR

.05 MI W SALINE CO, Williamson, IL

Built 1995 Load: 32.4 t ADT: 175

TR 43-CHITTYVILLE

Good

Over: POND CREEK TRIBUTARY

1 MI NE OF HERRIN, Williamson, IL

Built 1996 Load: 32.4 t ADT: 375

TR 35-THORN ROAD

Good

Over: POND CREEK

1.5 MI N OF CORINTH, Williamson, IL

Built 1997 Load: 32.4 t ADT: 50

TR 5-HARMONY CH RO

Good

Over: UNNAMED STREAM

3 MI NE JOHNSTON CTY, Williamson, IL

Built 1997 Load: 32.4 t ADT: 600

TR 29-DEAN ROAD

Good

Over: POND CREEK TRIB

3 MI NE JHNSTON CITY, Williamson, IL

Built 1998 Load: 32.4 t ADT: 150

TR 606-SOMERS CH R

Good

Over: UNNAMED STREAM

8 MI NE PITTSBURG, Williamson, IL

Built 1998 Load: 32.4 t ADT: 125

TR 428

Good

Over: S FORK SALINE RIVER

3MI SE OF MARION, Williamson, IL

Built 2000 Load: 32.4 t ADT: 25

TR 509

Good

Over: WOLF CREEK

5 MI S OF MARION, Williamson, IL

Built 2000 Load: 32.4 t ADT: 10

TR 664

Good

Over: TRIB TO GRASSSY CRK

1.2MI W OF STONEFORT, Williamson, IL

Built 2000 Load: 32.4 t ADT: 25

TR 269 E

Good

Over: TRIB TO WOLF CREEK

6 MI S OF MARION, Williamson, IL

Built 2001 Load: 32.4 t ADT: 100

ROCKY COMFORT RD

Good

Over: TRIB TO GRASSY LAKE

9MI S OF CARTERVILLE, Williamson, IL

Built 2002 Load: 32.4 t ADT: 350

TR 644

Good

Over: BRIAR CREEK

4 MI N OF STONEFORT, Williamson, IL

Built 2003 Load: 32.4 t ADT: 50

HARMONY CHURCH RD

Good

Over: TRIB TO POND CREEK

0.125 E. IL 37, Williamson, IL

Built 2003 Load: 32.4 t ADT: 800

TR 233

Good

Over: CRAB ORCHARD CREEK

1.5MI E IF PITTSBURG, Williamson, IL

Built 2003 Load: 32.4 t ADT: 275

TR 542

Good

Over: CRAB ORCHARD CREEK

1.2MI E OF PITTSBURG, Williamson, IL

Built 2003 Load: 32.4 t ADT: 200

TR 505 A

Good

Over: GRASSY CREEK

5 MI W PULLEYS MILL, Williamson, IL

Built 2005 Load: 32.4 t ADT: 175

PARTRIDGE RD

Good

Over: I.C.G. R.R.

1 MI. W. SALINE CO., Williamson, IL

Built 2008 Load: 32.4 t ADT: 50

NORTH BEND ROAD

Good

Over: HURRICANE CREEK

2 MI E OF HURST, Williamson, IL

Built 2006 Load: 32.4 t ADT: 100

TR 95

Good

Over: LITTLE HURRICANE CR

0.5 MI NORTH OF COLP, Williamson, IL

Built 2005 Load: 32.4 t ADT: 25

TR 268

Good

Over: WOLF CREEK

3 MI NW PULLEYS MILL, Williamson, IL

Built 2008 Load: 32.4 t ADT: 50

EWING ROAD

Good

Over: TURNER CREEK

3 M S. CRAB ORCHARD, Williamson, IL

Built 2011 Load: 32.4 t ADT: 125

SYCAMORE RD

Good

Over: CAMBRIA CREEK

1.5 MI W CAMBRIA, Williamson, IL

Built 2010 Load: 32.4 t ADT: 1,050

TR 603

Good

Over: BRUSHY CREEK

1 MI E CREAL SPRINGS, Williamson, IL

Built 2012 Load: 32.4 t ADT: 175

Showing 21,801-21,850 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.