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 318

Fair

Over: BR SENACHWINE CREEK

SW-12-HALLOCK, Peoria, IL

Built 1990 Load: 32.4 t ADT: 275

KRAUSE RD - TR 316

Fair

Over: HALLOCK CREEK

N.CTR-24-HALLOCK, Peoria, IL

Built 2011 Load: 32.4 t ADT: 525

CAHILL ROAD

Fair

Over: TIBER CREEK

CTR-36-T10NR5E, Peoria, IL

Built 1994 Load: 32.4 t ADT: 25

MENDENHALL RD-TR 1

Fair

Over: BR. HICKORY CREEK

SE-12-T10NR6E, Peoria, IL

Built 1991 Load: 32.4 t ADT: 75

LEGION HALL RD

Fair

Over: HICKORY RUN

NLINENE1/4-13T10NR6E, Peoria, IL

Built 1992 Load: 32.4 t ADT: 275

SWITZER RD

Fair

Over: NIXON RUN

CTR.NE1/4-16-T9NR6E, Peoria, IL

Built 1995 Load: 32.4 t ADT: 100

TIBER CREEK RD

Fair

Over: TIBER CREEK

SE-4-T9NR5E, Peoria, IL

Built 2002 Load: 32.4 t ADT: 200

TIBER CREEK RD

Fair

Over: WALNUT CREEK

NE-8-T9NR5E, Peoria, IL

Built 2012 Load: 32.4 t ADT: 325

MIDDLE RD (RELOC)

Fair

Over: E BR LAMARSH CR

NW-16-T8NR8E, Peoria, IL

Built 1982 Load: 32.4 t ADT: 300

NEBRASKA AVE

Fair

Over: DRY RUN CREEK

NW 5 T8NR8E, Peoria, IL

Built 1966 Load: 32.4 t ADT: 8,100

OLD BIG HOLLOW ROA

Fair

Over: BIG HOLLOW CR

FRNT RD SW OF US 150, Peoria, IL

Built 1990 Load: 32.4 t ADT: 25

TREASURE ST.

Fair

Over: KICKAPOO CREEK TRIB

S. OF FAI 474, Peoria, IL

Built 1993 Load: 32.4 t ADT: 575

Wilhelm Rd (CH 31D

Fair

Over: Trib to Kickapoo Crk

E CTR-25-T10NR7E, Peoria, IL

Built 2012 Load: 32.4 t ADT: 2,650

GALE AVE - FAU 659

Fair

Over: DRY RUN CREEK

NW-32-T9NR8E, Peoria, IL

Built 1965 Load: 32.4 t ADT: 2,475

CH 3

Fair

Over: TRIBUTARY HOG CREEK

0.7 MI W FRANKLIN CO, Perry, IL

Built 1976 Load: 32.4 t ADT: 200

TR 332

Fair

Over: COLLIER CREEK

2 MI NORTH OF CH6, Perry, IL

Built 1977 Load: 32.4 t ADT: 50

TR 305A

Fair

Over: GALUM CREEK

0.5 MI N JACKSON CO, Perry, IL

Built 1977 Load: 32.4 t ADT: 50

TR 268

Fair

Over: REESE CREEK

0.8 MI N. FAS 865, Perry, IL

Built 1977 Load: 32.4 t ADT: 400

TR146

Fair

Over: BRUSH BRANCH

0.5 MI W. OF ILL 127, Perry, IL

Built 1978 Load: 32.4 t ADT: 75

TR 305

Fair

Over: SLOUGH CREEK

1 MI WEST OF CH 18, Perry, IL

Built 1978 Load: 32.4 t ADT: 75

FAS 1880

Fair

Over: TRIB LITTLE MUDDY R.

5.8 MI E. OF US 51, Perry, IL

Built 1978 Load: 32.4 t ADT: 275

CH 7

Fair

Over: REESE CREEK

0.9 MI E FAS 865, Perry, IL

Built 1977 Load: 32.4 t ADT: 1,050

TR 55

Fair

Over: GALUM CREEK

0.5 MI S OF ILL 13, Perry, IL

Built 1978 Load: 32.4 t ADT: 100

TR 305A

Fair

Over: PIPESTONE CREEK

0.5 MI N OF JACKSON, Perry, IL

Built 1980 Load: 32.4 t ADT: 50

TR 297B

Fair

Over: BRUSHY FORK CREEK

1 MI N JACKSON CO, Perry, IL

Built 1980 Load: 32.4 t ADT: 25

TR 76

Fair

Over: GALUM CREEK

2.5 MI N OF DENMARK, Perry, IL

Built 1980 Load: 32.4 t ADT: 150

CO HWY 8

Fair

Over: TRIB TO LITTLE MUDDY

W OF FRANKLIN CO, Perry, IL

Built 1981 Load: 32.4 t ADT: 275

CO HWY 3

Fair

Over: HOG CREEK

0.9 MI W FRANKLIN CO, Perry, IL

Built 1981 Load: 32.4 t ADT: 275

TR 109

Fair

Over: BONNIE CREEK

1.6 MILES E OF CH 11, Perry, IL

Built 1981 Load: 32.4 t ADT: 125

TR 81

Fair

Over: GALUM CREEK

1.4 MI E FAS 1834, Perry, IL

Built 1981 Load: 32.4 t ADT: 75

TR 42

Fair

Over: MUD CREEK

2.4 MI N ILL 13, Perry, IL

Built 1981 Load: 32.4 t ADT: 100

TR 189

Fair

Over: LITTLE GALUM CREEK

2.8 MI E FAS 1823, Perry, IL

Built 1983 Load: 32.4 t ADT: 150

TR 84

Fair

Over: BRUSHY FORK CR

2.3 MI S OF FAS 864, Perry, IL

Built 1983 Load: 32.4 t ADT: 200

TR 84

Fair

Over: PIPESTONE CREEK

2.2 MI S FAS 864, Perry, IL

Built 1983 Load: 32.4 t ADT: 200

TR 153A

Fair

Over: REESE CREEK

1 MI E OF US 51, Perry, IL

Built 1983 Load: 32.4 t ADT: 100

TR 91

Fair

Over: GALUM CREEK

0.8 MI E OF CH 12, Perry, IL

Built 1983 Load: 32.4 t ADT: 75

TR 231

Fair

Over: SPILLTHRU TO GALUM

2.3 MI NO FAS 864, Perry, IL

Built 1984 Load: 32.4 t ADT: 50

TOWNSHIP ROAD 197B

Fair

Over: GALUM CREEK

2.0 MI SOUTH FAP 837, Perry, IL

Built 1984 Load: 32.4 t ADT: 150

TR 233

Fair

Over: BEACOUP CREEK

0.6 NE ILL13, Perry, IL

Built 1986 Load: 32.4 t ADT: 200

TR 129

Fair

Over: LITTLE GALUM CR

ON TR 129 W OF ILL13, Perry, IL

Built 1986 Load: 32.4 t ADT: 175

CH 22-TR1CO RD

Fair

Over: BRANCH TO BRUSHY CRK

2 MI E OF RTE 4, Perry, IL

Built 1987 Load: 32.4 t ADT: 225

TR 35

Fair

Over: LITTLE BEAUCOUP

1.1 MI W. OF US 51, Perry, IL

Built 1987 Load: 32.4 t ADT: 50

TR 109

Fair

Over: BRANCH OF BONNIE CR

3.5 MI N OF CONANT, Perry, IL

Built 1991 Load: 32.4 t ADT: 125

TR 118A

Fair

Over: WOLF CREEK

3 MI E OF WINKLE, Perry, IL

Built 1988 Load: 32.4 t ADT: 75

CH 23

Fair

Over: BRUSHY CREEK

NE COR SEC 3-7-4, Perry, IL

Built 1988 Load: 32.4 t ADT: 225

CO HWY 2

Fair

Over: BLACKSOP CREEK

0.2 MI N OF ILL 4, Perry, IL

Built 1989 Load: 32.4 t ADT: 950

FAS 866-CH 11

Fair

Over: SLADES BRANCH

1.75 MI E IL 127, Perry, IL

Built 1990 Load: 32.4 t ADT: 250

TR 59

Fair

Over: BEAUCOUP CREEK

2.5 MI SE TODDS MILL, Perry, IL

Built 1991 Load: 32.4 t ADT: 125

TR 283

Fair

Over: GALUM CREEK

3 MI ESE DENMARK, Perry, IL

Built 1992 Load: 32.4 t ADT: 350

TR 320

Fair

Over: HOG CREEK

1 MI S KIMZEY RD, Perry, IL

Built 1994 Load: 32.4 t ADT: 25

Showing 9,201-9,250 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.