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

CH 18

Good

Over: WEBSTER CREEK

0.5 MI N OF NOLTINGS, Washington, IL

Built 1992 Load: 32.4 t ADT: 525

TR 2

Good

Over: BRANCH LITTLE MUD CK

5 MI SW ST. LIBORY, Washington, IL

Built 1991 Load: 32.4 t ADT: 175

TR 56

Good

Over: BRANCH ELKHORN CK

2.5 MI N CH 10, Washington, IL

Built 1991 Load: 32.4 t ADT: 50

TR 7

Good

Over: BR OF CROOKED CR

4 MI NW OF HOYLETON, Washington, IL

Built 1992 Load: 32.4 t ADT: 275

TR 250

Good

Over: FULTON BRANCH

1 MI W OF WAMAC, Washington, IL

Built 1992 Load: 32.4 t ADT: 50

TR 229

Good

Over: SUGAR CREEK

4 MI W OF RADOM, Washington, IL

Built 1992 Load: 32.4 t ADT: 75

TR 44A

Good

Over: MUD CREEK

6 MI SE OF LIVELY GR, Washington, IL

Built 1992 Load: 32.4 t ADT: 100

TR 188A

Good

Over: MIDDLE CREEK

2.25 MI N. BEAUCOUP, Washington, IL

Built 1994 Load: 32.4 t ADT: 10

TR 35

Good

Over: BR OF GRAND POINT CK

2.75 MI NE HOYLETON, Washington, IL

Built 1994 Load: 32.4 t ADT: 25

TR 257

Good

Over: PANTHER CREEK

3.8MI EAST OF POSEN, Washington, IL

Built 1995 Load: 32.4 t ADT: 50

TR 160

Good

Over: TRIB TO COON CREEK

3M NW OF HOYLETON, Washington, IL

Built 1995 Load: 32.4 t ADT: 50

CH 18

Good

Over: WEBSTER CK OVERFLOW

NORTH OF NOLTINGS, Washington, IL

Built 1994 Load: 32.4 t ADT: 525

CH 18

Good

Over: SEWER CREEK OVERFLOW

NORTH OF NOLTINGS, Washington, IL

Built 1994 Load: 32.4 t ADT: 550

TR 206A

Good

Over: BACK CREEK

3MI SE OF BEAUCOUP, Washington, IL

Built 1995 Load: 32.4 t ADT: 75

TR 214

Good

Over: BR. GRAND POINT CK

2.5 MI NE HOYLETON, Washington, IL

Built 1996 Load: 32.4 t ADT: 100

TR 235

Good

Over: BR. OF MUD CREEK

2.5M SW OF LIVELY GR, Washington, IL

Built 1996 Load: 32.4 t ADT: 100

TR 229

Good

Over: BEAUCOUP CREEK

4 MI S BEAUCOUP, Washington, IL

Built 1996 Load: 32.4 t ADT: 75

TR 182

Good

Over: BR OF NORTH CK

1.5 MI N. HUEGELY, Washington, IL

Built 1998 Load: 32.4 t ADT: 100

TR 166

Good

Over: BR.OF LOCUST CREEK

1 MI WEST OF POSEN, Washington, IL

Built 1998 Load: 32.4 t ADT: 50

TR 202/ARIZONA RD

Good

Over: BR.OF MIDDLE CREEK

2 MI NE OF BEAUCOUP, Washington, IL

Built 1998 Load: 32.4 t ADT: 25

TR77A MAPLE RD

Good

Over: BR. GRAND POINT CK

4 MI SE HOYLETON, Washington, IL

Built 1999 Load: 32.4 t ADT: 50

TR 53 WILLOW ROAD

Good

Over: BR LITTLE CROCKED CK

SE EDGE NEW MINDEN, Washington, IL

Built 1999 Load: 32.4 t ADT: 50

TR 198 PANTHER CK

Good

Over: BR. PANTHER CREEK

4 MI. SE POSEN, Washington, IL

Built 1999 Load: 32.4 t ADT: 75

TR177 MASSACHUSE R

Good

Over: BR OF RAYSE CK

2MI E OF ASHLEY, Washington, IL

Built 2000 Load: 32.4 t ADT: 250

TR 98/CLEVELAND RD

Good

Over: ELKHORN CREEK

2.25MI NE OF OAKDALE, Washington, IL

Built 2003 Load: 32.4 t ADT: 50

TR285/TENNESEE RD

Good

Over: PUNCHEON CREEK

3 MI NE OF DUBOIS, Washington, IL

Built 2000 Load: 32.4 t ADT: 25

TR 90/PLUM HILL CH

Good

Over: BR. OF WILLIAMS CK.

4MI SW OF ADDIEVILLE, Washington, IL

Built 2003 Load: 32.4 t ADT: 50

TR 190/BIRCH RD

Good

Over: BR OF NORTH CREEK

3.25MI SW HOYLETON, Washington, IL

Built 2005 Load: 32.4 t ADT: 25

TR 222/ASH RD

Good

Over: BR. OF GRAND PT CK

3MI SW IRVINGTON, Washington, IL

Built 2004 Load: 32.4 t ADT: 75

TR 165

Good

Over: BR OF WILLIAMS CREEK

2MI SSW PLUM HILL, Washington, IL

Built 2010 Load: 32.4 t ADT: 25

TR 224

Good

Over: BR LITTLE MUDDY CRE

1.75MI NORHT DUBOIS, Washington, IL

Built 2010 Load: 32.4 t ADT: 50

TR 35/WALNUT HILL

Good

Over: BR LITTLE CROOKED CR

1.5MI NE NEW MINDEN, Washington, IL

Built 2005 Load: 32.4 t ADT: 200

TR 277

Good

Over: BR OF S FORK MUD CK

NE 1/4 SEC34 T35 R5W, Washington, IL

Built 2007 Load: 32.4 t ADT: 200

TR 235

Good

Over: BR MUD CREEK

3.5M W OF CLARMIN, Washington, IL

Built 2008 Load: 32.4 t ADT: 1,150

FAS 836 (CH8)

Good

Over: LITTLE MUDDY RIVER

0.5 MI EAST DUBOIS, Washington, IL

Built 2010 Load: 32.4 t ADT: 550

TR 145

Good

Over: Elkhorn Creek

1.25 Mi E of IL 153, Washington, IL

Built 2014 Load: 32.4 t ADT: 75

TR 178 Elm Road

Good

Over: Coon Creek

2 Mi NW of Hoyleton, Washington, IL

Built 2015 Load: 32.4 t ADT: 75

FAS 788 (CH 11)

Good

Over: Branch of North Crk

0.5 Mi S of IL 177, Washington, IL

Built 2015 Load: 32.4 t ADT: 575

IRVINGTON RD-MS570

Good

Over: WEBSTER CREEK

1.4MI S WASH CO LINE, Washington, IL

Built 1988 Load: 32.4 t ADT: 375

FAP-328 (US-45)

Good

Over: WATSON CREEK

.8 MI N WHITE CO LN, Wayne, IL

Built 1974 Load: 32.4 t ADT: 2,000

TR-576

Good

Over: MILLER CREEK

1.5 MI N MT ERIE, Wayne, IL

Built 1984 Load: 32.4 t ADT: 25

TR-267

Good

Over: DRY FORK

7 MI N SIMS, Wayne, IL

Built 1978 Load: 32.4 t ADT: 100

FAS-2821

Good

Over: DRY FORK

5 MI W GEFF, Wayne, IL

Built 1984 Load: 32.4 t ADT: 100

TR-381

Good

Over: CROOKED CREEK

4 MI N WAYNE CITY, Wayne, IL

Built 1980 Load: 32.4 t ADT: 100

TR-329

Good

Over: LITTLE DRY FORK CK

4.5 MI N SIMS, Wayne, IL

Built 1981 Load: 32.4 t ADT: 75

TR-40

Good

Over: FOUR MILE CREEK

2.5 MI SW KEENES, Wayne, IL

Built 1981 Load: 32.4 t ADT: 100

TR-329

Good

Over: CROOKED CREEK

0.5 MI W CRISP, Wayne, IL

Built 1982 Load: 32.4 t ADT: 75

TR-207

Good

Over: WEST DIVERSION DITCH

2.5 MI SE MT ERIE, Wayne, IL

Built 1982 Load: 32.4 t ADT: 25

TR-129

Good

Over: ENDSLEY CREEK

3.5 MI NE CISNE, Wayne, IL

Built 1983 Load: 32.4 t ADT: 50

TR-463

Good

Over: TRIB EAGLE SLOUGH

S FAIRFIELD WYE, Wayne, IL

Built 1983 Load: 32.4 t ADT: 50

Showing 21,451-21,500 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.