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

FAU 9018/ WANDA RD

Fair

Over: CAHOKIA DIV CANAL

1.0 MI NORTH OF POAG, Madison, IL

Built 1986 Load: 32.4 t ADT: 1,800

STIEGLITE RD/ TR 1

Fair

Over: PADDOCK CK

2.2 NW OF PRAIREITOW, Madison, IL

Built 1989 Load: 32.4 t ADT: 50

TR 55

Fair

Over: HONEYCUT BRANCH

4.5 MILES N OF ALTON, Madison, IL

Built 1986 Load: 32.4 t ADT: 100

TR 21

Fair

Over: TRIB W FRK W R CRK

4.5 MI N OF ALTON, Madison, IL

Built 1988 Load: 32.4 t ADT: 150

CH 36 LAGEMAN RD

Fair

Over: LITTLE PIASA CREEK

0.15 S OF JERSEY CO, Madison, IL

Built 1985 Load: 32.4 t ADT: 1,300

CULP LANE/ TR 117

Fair

Over: ROCKY BRANCH CREEK C

.8 MI NORTH BETHALTO, Madison, IL

Built 1986 Load: 32.4 t ADT: 1,400

SNAKE RD TR 122

Fair

Over: E FORK-WOOD RIV CR

2.0 MI NW DORSEY, Madison, IL

Built 1987 Load: 32.4 t ADT: 150

BARENFINGR RD/TR21

Fair

Over: E FORK SHERRY CK

2.5 MI NE PRAIRIETOW, Madison, IL

Built 1989 Load: 32.4 t ADT: 50

STRAUBE LN/ TR 21A

Fair

Over: W. FORK WOOD RIVER

4.5 NORTH OF ALTON, Madison, IL

Built 1990 Load: 32.4 t ADT: 100

BRCKYD HILL RD/TR2

Fair

Over: TRIB. TO CAHOKIA CK.

1.2 MI. W. OF WORDEN, Madison, IL

Built 1986 Load: 32.4 t ADT: 200

TR 103 UNTERBRINK

Fair

Over: INDIAN CREEK

1.4 MI. W MIDWAY, Madison, IL

Built 1994 Load: 32.4 t ADT: 100

HUETTE RD(TR 150)

Fair

Over: BR WOOD RIVER CRK

1.9MI N OF DORSEY, Madison, IL

Built 1998 Load: 32.4 t ADT: 125

CULP LN/MSS 901

Fair

Over: E FK WOODRIVER CK

BETHALTO, Madison, IL

Built 2009 Load: 32.4 t ADT: 1,400

CREST DRIVE / MS82

Fair

Over: BRANCH OF WOOD RIVER

CREST DR NOF RT 140, Madison, IL

Built 1982 Load: 32.4 t ADT: 450

FAU 9093/19TH STRE

Fair

Over: TRRA&NEW CONRR&ICGRR

19ST OVER NOFLK&WSRR, Madison, IL

Built 1981 Load: 32.4 t ADT: 6,300

STADIUM DR.

Fair

Over: ROCKY BRANCH CRK

0.2 MI S CULP RD., Madison, IL

Built 2006 Load: 32.4 t ADT: 1,400

IL 37

Fair

Over: IC RR

4.25 MI N SALEM, Marion, IL

Built 1930 Load: 32.4 t ADT: 2,350

FAI-57 NB

Fair

Over: CROOKED CREEK

3 MI S SALEM INT, Marion, IL

Built 1968 Load: 32.4 t ADT: 9,650

FAI-57 SB

Fair

Over: CROOKED CREEK

3 MI S SALEM INT, Marion, IL

Built 1968 Load: 32.4 t ADT: 9,650

I-57 NB

Fair

Over: IC RR

3 MI N SALEM INT, Marion, IL

Built 1968 Load: 32.4 t ADT: 8,350

I-57 SB

Fair

Over: ICRR

3 MI N SALEM INT, Marion, IL

Built 1967 Load: 32.4 t ADT: 8,350

TR-64

Fair

Over: CROOKED CREEK

2 MI E CENTRAL CITY, Marion, IL

Built 1974 Load: 32.4 t ADT: 200

TR-337

Fair

Over: ZION HILL BRANCH

0.5 MI NE RACON CK R, Marion, IL

Built 1975 Load: 32.4 t ADT: 100

TR-401A

Fair

Over: KRIETEMEYER BRANCH

0.5 MI E CENTRALIA, Marion, IL

Built 1974 Load: 32.4 t ADT: 375

FAS-789 (CH 27)

Fair

Over: DUMS CREEK

3 MI N IUKA, Marion, IL

Built 1986 Load: 32.4 t ADT: 675

FAS-789

Fair

Over: FULTON CREEK

2.5 MI S IUKA, Marion, IL

Built 1995 Load: 32.4 t ADT: 725

TR 249A

Fair

Over: BRUBAKER CREEK

1.5 MI SE SALEM, Marion, IL

Built 1996 Load: 32.4 t ADT: 400

TR 239

Fair

Over: ICG RR

4.5 MI E IUKA, Marion, IL

Built 1999 Load: 32.4 t ADT: 25

FAU 8592

Fair

Over: JOHNNIE BRANCH

N PART CENTRALIA, Marion, IL

Built 1999 Load: 32.4 t ADT: 900

TR 168

Fair

Over: JIMS CREEK

5 MI NNW SALEM, Marion, IL

Built 2004 Load: 32.4 t ADT: 75

TR-28

Fair

Over: WEBSTER CREEK

SE WAMAC, Marion, IL

Built 1975 Load: 32.4 t ADT: 125

FAU-8556

Fair

Over: SALEM RESERVOIR DAM

SALEM, Marion, IL

Built 1993 Load: 32.4 t ADT: 475

TR 77 (TH-C68)

Fair

Over: CREEK

STEUBEN SEC. 19, Marshall, IL

Built 1998 Load: 32.4 t ADT: 50

TR 86 (TH-S34)

Fair

Over: SANDY CREEK

T30N-R2W-3PM SEC 2, Marshall, IL

Built 1977 Load: 32.4 t ADT: 50

TR 33 (TH-C60)

Fair

Over: CREEK

T30N-R2W-3PM SEC 3, Marshall, IL

Built 1986 Load: 32.4 t ADT: 75

TR 96 (TH-S38)

Fair

Over: SANDY CREEK

T30N-R1W-3PM SEC 6, Marshall, IL

Built 1979 Load: 32.4 t ADT: 25

TR 150 (TH-S60)

Fair

Over: SANDY CREEK

T30N-RIE-3PM SEC 10, Marshall, IL

Built 1979 Load: 32.4 t ADT: 25

TR 37 (TH-C60)

Fair

Over: JUDD CREEK

T30N-R1E-3PM SEC 7, Marshall, IL

Built 1980 Load: 32.4 t ADT: 75

TR 146 (TH-S 59)

Fair

Over: SANDY CREEK

T30N-RIE-3PM SEC 10, Marshall, IL

Built 1984 Load: 32.4 t ADT: 25

TR 147 (TH-D17)

Fair

Over: HALLENBACK CREEK

T29N-R1W-3PM SEC 35, Marshall, IL

Built 1978 Load: 32.4 t ADT: 25

TR 68 (TH-S 27)

Fair

Over: CROW CREEK

T29N-R2W-3PM SEC 29, Marshall, IL

Built 1983 Load: 32.4 t ADT: 50

TR 68 (TH-S27)

Fair

Over: ATSF RR

T29N-R2W-3PM SEC 29, Marshall, IL

Built 1986 Load: 32.4 t ADT: 50

TR 42 (TH-S17)

Fair

Over: THENIUS CREEK

T12N-R9E-4PM SEC 2, Marshall, IL

Built 1978 Load: 32.4 t ADT: 25

TR 42 (TH-S17)

Fair

Over: THENIUS CREEK

T12N-R9E-4PM SEC 2, Marshall, IL

Built 1980 Load: 32.4 t ADT: 25

TR 24 (TH-R66)

Fair

Over: CREEK

T12N-R8E-4PM SEC 13, Marshall, IL

Built 1980 Load: 32.4 t ADT: 50

THENIUS ROAD

Fair

Over: THENIUS CR

VILLAGE OF SPARLAND, Marshall, IL

Built 1987 Load: 32.4 t ADT: 150

FAS 572 (CH 5)

Fair

Over: DUFF ARMSTRONG DITCH

1.5 M SW EASTON, Mason, IL

Built 2012 Load: 32.4 t ADT: 200

TR 43

Fair

Over: QUIVER CR

2.5 MI W TOPEKA, Mason, IL

Built 1984 Load: 32.4 t ADT: 25

TR43

Fair

Over: QUIVER CREEK

2.5MI W TOPEKA, Mason, IL

Built 1985 Load: 32.4 t ADT: 25

TR 112

Fair

Over: MASON TAZEWELL DITCH

1.0 MI E OF TOPEKA, Mason, IL

Built 1987 Load: 32.4 t ADT: 25

Showing 8,851-8,900 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.