State profile · Near national median SD

Illinois bridge safety

Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Illinois — drawn straight from the FHWA National Bridge Inventory.

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

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 rated 0-4

Structurally Deficient

7.9%

2,186 bridges flagged for repair priority

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 — Structurally deficient share 26.3%
National avg

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

Condition Distribution

Bridge inventory deck-condition mix — Illinois (FHWA NBI)

Illinois41.185163825109036%36.47046101719353%7.879465090293047%7.879465090293047%GoodFairPoorStructurally Deficient
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 on the structurally deficient leaderboard (lower share = better)

States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Illinois on the same metric.

44

Rhode Island

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

31

Nebraska

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

17

Illinois

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

25

Massachusetts

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

29

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 composite NBI rating. Each is inspected at least every 24 months.

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

Structurally Deficient

Over: WILSON CREEK

NE-35-T3NR2E, Fulton, IL

Built 1935 Load: 1.3 t ADT: 10

TR 10-B

Structurally Deficient

Over: KING CREEK

W EDGE OF MINERAL, Bureau, IL

Built 1899 Load: 1.6 t ADT: 10

TR-6

Structurally Deficient

Over: DRAINAGE DITCH

3.5 MI NE DIETERICH, Effingham, IL

Built 1909 Load: 1.6 t ADT: 25

TR208K(TWIN BRIDGE

Structurally Deficient

Over: BIG CREEK

NE EDGE MT ZION, Macon, IL

Built 1967 Load: 1.9 t ADT: 375

All Bridges in Illinois

TR 538

Good

Over: LITTLE CRAB ORCHARD

1 MI W CRAB ORCHARD, Williamson, IL

Built 2012 Load: 32.4 t ADT: 250

TR 632

Good

Over: ROCK CREEK

3 MI E CRAB ORCHARD, Williamson, IL

Built 1976 Load: 32.4 t ADT: 325

VICKSBURG STREET

Good

Over: DRAINAGE DITCH

3 BLKS NORTH MAIN ST, Williamson, IL

Built 1979 Load: 32.4 t ADT: 400

COLLEGE & GRANITE

Good

Over: WEST END CREEK

MARION, Williamson, IL

Built 1989 Load: 32.4 t ADT: 800

BOYTON ST-FAU 9631

Good

Over: WEST END CREEK

MARION, Williamson, IL

Built 1997 Load: 32.4 t ADT: 5,000

MITCHELL ST

Good

Over: WEST END CREEK

MARION, Williamson, IL

Built 1997 Load: 32.4 t ADT: 75

LIBERTY STREET

Good

Over: WEST END CREEK

MARION, Williamson, IL

Built 1997 Load: 32.4 t ADT: 125

MONROE STREET

Good

Over: WEST END CREEK

MARION, Williamson, IL

Built 1997 Load: 32.4 t ADT: 150

HOLLAND AVENUE

Good

Over: WEST END CREEK

MARION, Williamson, IL

Built 1997 Load: 32.4 t ADT: 175

OLD CREAL SPRINGS

Good

Over: CRAB ORCHARD CREEK

SE SIDE OF MARION, Williamson, IL

Built 1999 Load: 32.4 t ADT: 1,900

ALLEY

Good

Over: WEST END CREEK

MARION, Williamson, IL

Built 1997 Load: 32.4 t ADT: 10

CS 1104-AUGUSTA DR

Good

Over: UNNAMED STREAM

KOKOPELLI SUBDVSION, Williamson, IL

Built 1996 Load: 32.4 t ADT: 125

FAU 9588-HERRIN ST

Good

Over: 17TH ST DITCH

0.31 MI W OF IL 148, Williamson, IL

Built 1999 Load: 32.4 t ADT: 7,000

FUTURE STREET

Good

Over: DRAINAGE DITCH

FUTURE S OF COLLEGE, Williamson, IL

Built 2007 Load: 32.4 t ADT: 375

GARDEN AVE

Good

Over: DITCH

0.65 MI E OF SKYLINE, Williamson, IL

Built 2015 Load: 32.4 t ADT: 1,900

ILL 75

Good

Over: TIMOTHY CREEK

0.3 MI E MERIDIAN RD, Winnebago, IL

Built 2007 Load: 32.4 t ADT: 2,550

US RTE 20

Good

Over: COOLIDGE CREEK

4 MI E PECATONICA RD, Winnebago, IL

Built 2003 Load: 32.4 t ADT: 14,600

US BUS 20

Good

Over: DRAINAGE

.39 MI W MERIDIAN RD, Winnebago, IL

Built 2009 Load: 32.4 t ADT: 5,350

IL RTE 75

Good

Over: DRAINAGE

.11MI NE OWEN CENTER, Winnebago, IL

Built 2010 Load: 32.4 t ADT: 2,250

I-90

Good

Over: DRAINAGE

.13MI S PRAIRIE RD, Winnebago, IL

Built 2012 Load: 32.4 t ADT: 25,500

Forrest Hills Rd

Good

Over: DRAINAGE

470' N of IL 173, Winnebago, IL

Built 2014 Load: 32.4 t ADT: 10,400

SBI70/IL70 TRASK B

Good

Over: DRAINAGE DITCH

.2 MI E MERIDIAN RD, Winnebago, IL

Built 1991 Load: 32.4 t ADT: 4,600

ILL 173

Good

Over: DRAINAGE DITCH

.1 MI E OF ILL 251, Winnebago, IL

Built 2011 Load: 32.4 t ADT: 20,100

ORLANDO ST

Good

Over: DRAINAGE DITCH

.02MI N OF ILL 173, Winnebago, IL

Built 2011 Load: 32.4 t ADT: 5,500

STEPHENS RD

Good

Over: DRAINAGE

INTERSECTION @ HARRISON R, Winnebago, IL

Built 2023 Load: 32.4 t ADT: 200

FITZGERALD ROAD

Good

Over: ROCK CREEK

0.5 MI W PRAIRIE RD, Winnebago, IL

Built 1979 Load: 32.4 t ADT: 125

RIVERSIDE BLVD

Good

Over: KEITH CREEK

0.1 MI E PAULSON RD., Winnebago, IL

Built 1978 Load: 32.4 t ADT: 4,875

PAULSON ROAD

Good

Over: KEITH CREEK

0.08 MI S RIVERSIDE, Winnebago, IL

Built 1978 Load: 32.4 t ADT: 150

WINDSOR ROAD

Good

Over: DRAINAGE DITCH

0.1 M W ALPINE, Winnebago, IL

Built 1972 Load: 32.4 t ADT: 9,150

ALPINE ROAD

Good

Over: UNNAMED DRAINAGEWAY

0.1 MI S OF LINDEN RD, Winnebago, IL

Built 1985 Load: 32.4 t ADT: 6,600

ALPINE RD-FAP 412

Good

Over: S BR OF KEITH CR

.3 MI S OF STATE ST, Winnebago, IL

Built 2015 Load: 32.4 t ADT: 24,500

KISHWAUKEE ST

Good

Over: DRAINAGE DITCH

N OF SANDY HOLLOW RD, Winnebago, IL

Built 1992 Load: 32.4 t ADT: 7,750

PEARL AVE

Good

Over: LOVES PARK CREEK

SOUTHWEST LOVES PARK, Winnebago, IL

Built 1974 Load: 32.4 t ADT: 1,150

RIVER LANE

Good

Over: LOVES PARK CREEK

E. OF IL 251, Winnebago, IL

Built 1995 Load: 32.4 t ADT: 1,950

WALKER AVE

Good

Over: LOVES PARK CREEK

N. OF CLIFFORD AVE, Winnebago, IL

Built 1996 Load: 32.4 t ADT: 575

JOHN STREET

Good

Over: LOVES PARK CREEK

N. OF CLIFFORD AVE, Winnebago, IL

Built 1996 Load: 32.4 t ADT: 150

GARDEN PLAIN ROAD

Good

Over: LOVES PARK CREEK

.07 mi N of Riversid, Winnebago, IL

Built 2012 Load: 32.4 t ADT: 350

TR 129

Good

Over: BR TO WALNUT CREEK

2 MI SE METAMORA, Woodford, IL

Built 1983 Load: 32.4 t ADT: 25

TR 106

Good

Over: TRIB WALNUT CREEK

1300E 1290N, Woodford, IL

Built 1982 Load: 32.4 t ADT: 25

TR 140B

Good

Over: W BR PANTHER CR

SW EDGE OF ROANOKE, Woodford, IL

Built 1989 Load: 32.4 t ADT: 475

TR149

Good

Over: TRIB W BR PANTHER CR

1.5 MI W CH K, Woodford, IL

Built 1984 Load: 32.4 t ADT: 25

TR137

Good

Over: PANTHER CREEK

6 MI E-TR 204, Woodford, IL

Built 1994 Load: 32.4 t ADT: 10

TR 47

Good

Over: SNAKE CR

2.0MI W OF CH 13, Woodford, IL

Built 1995 Load: 32.4 t ADT: 25

TR 213

Good

Over: WALNUT CREEK

1 MI SW EUREKA, Woodford, IL

Built 2001 Load: 32.4 t ADT: 725

TR 81

Good

Over: PANTHER CREEK

3.2 MI N PANOLA, Woodford, IL

Built 1997 Load: 32.4 t ADT: 50

TR 150A

Good

Over: ROCK CREEK

.11 MI N TR 271, Woodford, IL

Built 2003 Load: 32.4 t ADT: 50

TR 165

Good

Over: TRIB OF PANTHER CR

2.6 MI E OF SECOR, Woodford, IL

Built 1999 Load: 32.4 t ADT: 100

TR 0129

Good

Over: WALNUT CREEK

1134E,1300N, Woodford, IL

Built 2001 Load: 32.4 t ADT: 50

TR 129

Good

Over: WALNUT CREEK

1150E,1300N, Woodford, IL

Built 2001 Load: 32.4 t ADT: 50

TR 39

Good

Over: HALLENBACK CR

4.5 W OF ILL 116, Woodford, IL

Built 2005 Load: 32.4 t ADT: 50

Showing 21,851-21,900 of 27,743 bridges

Related

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

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). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.

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.