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 221

Fair

Over: E FK OF LAMOINE R.

4.5MI N OF ST. MARY, Hancock, IL

Built 1981 Load: 32.4 t ADT: 50

TR 227

Fair

Over: LITTLE CREEK

1.25 NE MIDDLE CREEK, Hancock, IL

Built 1987 Load: 32.4 t ADT: 100

TR 295

Fair

Over: BRONSON CREEK

2.5 NE DENVER, Hancock, IL

Built 1987 Load: 32.4 t ADT: 50

TR 240

Fair

Over: BRONSON CREEK

3.5 NE DENVER, Hancock, IL

Built 1981 Load: 32.4 t ADT: 50

TR 266

Fair

Over: SPRING CREEK

0.9 MI S OF DISCO, Hancock, IL

Built 1980 Load: 32.4 t ADT: 100

TR 344

Fair

Over: LA HARPE CREEK

2.0 MI S LA HARPE, Hancock, IL

Built 1994 Load: 32.4 t ADT: 75

TR 400

Fair

Over: S BRHN OF CROOKED CR

2.0 MI E LAHARPE, Hancock, IL

Built 1983 Load: 32.4 t ADT: 50

TR 58

Fair

Over: RAILROAD CREEK

2.0 SE HAMILTON, Hancock, IL

Built 1983 Load: 32.4 t ADT: 150

TR 3A

Fair

Over: SYCAMORE CREEK

.4 MI N OF NAUVOO, Hancock, IL

Built 1986 Load: 32.4 t ADT: 450

TR 200A

Fair

Over: SHORT CREEK

2MI S BURNSIDE, Hancock, IL

Built 1993 Load: 32.4 t ADT: 50

TR 91

Fair

Over: WILDCAT CREEK

1.7 W LACROSSE, Hancock, IL

Built 1982 Load: 32.4 t ADT: 125

TR 214

Fair

Over: SHORT CREEK

3.0 SE BURNSIDE, Hancock, IL

Built 1981 Load: 32.4 t ADT: 150

TR 225

Fair

Over: WEST FORK BEAR CR

.1 MI SE ELVASTON, Hancock, IL

Built 1981 Load: 32.4 t ADT: 100

TR 154

Fair

Over: ROCK CREEK

.5 MI. N OF FERRIS, Hancock, IL

Built 1982 Load: 32.4 t ADT: 100

TR 379

Fair

Over: THE BLUFF CANAL

5.5 S WARSAW, Hancock, IL

Built 1986 Load: 32.4 t ADT: 125

TR 104

Fair

Over: TRIB OF PANTHER CR

3.0 W STILLWELL, Hancock, IL

Built 1979 Load: 32.4 t ADT: 50

TR 339

Fair

Over: BEAR CREEK

3.0 NW WEST POINT, Hancock, IL

Built 1983 Load: 32.4 t ADT: 50

FAS 430

Fair

Over: LITTLE CREEK

1MI S OF MIDDLECREEK, Hancock, IL

Built 1992 Load: 32.4 t ADT: 25

TR 334

Fair

Over: PANTHER CREEK

2.0 SW ST MARY, Hancock, IL

Built 1983 Load: 32.4 t ADT: 25

TR 133

Fair

Over: N FK OF LARRY'S CR

5.5 SW NAUVOO, Hancock, IL

Built 1984 Load: 32.4 t ADT: 75

1ST STREET

Fair

Over: CREEK

DALLAS CITY, Hancock, IL

Built 1993 Load: 32.4 t ADT: 200

ILL 34

Fair

Over: DITCH

4.15M N OF 34/146, Hardin, IL

Built 1923 Load: 32.4 t ADT: 1,200

TR 101

Fair

Over: BRANCH HOSICK CK

1.5 MI NE E'TOWN, Hardin, IL

Built 1978 Load: 32.4 t ADT: 125

TR 7

Fair

Over: BIG CREEK

2 MI E KARBERS RIDGE, Hardin, IL

Built 1982 Load: 32.4 t ADT: 75

TR 116

Fair

Over: HONEY CREEK

3 MI E OF IL 1, Hardin, IL

Built 1987 Load: 32.4 t ADT: 100

TR 52A

Fair

Over: HOGTHIEF CREEK

3 MI N ELIZABETHTOWN, Hardin, IL

Built 1991 Load: 32.4 t ADT: 50

TR 39

Fair

Over: TRIB TO BIG CREEK

2MI S OF KARBERS RID, Hardin, IL

Built 1992 Load: 32.4 t ADT: 25

TR 101

Fair

Over: ROUND SPRINGS CREEK

2 MI. W CAVE-IN-ROCK, Hardin, IL

Built 2004 Load: 32.4 t ADT: 75

US 34

Fair

Over: MISS RIV & CRI&P RR

IN BURLINGTON, Henderson, IL

Built 1994 Load: 32.4 t ADT: 10,800

N RARITAN RD

Fair

Over: HONEY CR

N.EDGE OF RARITAN, Henderson, IL

Built 1987 Load: 32.4 t ADT: 350

FAS 1420 - CH 6

Fair

Over: DEEP RUN CREEK

W.CTR-10-T9NR5W, Henderson, IL

Built 1987 Load: 32.4 t ADT: 375

FAS 1421 - CH 2

Fair

Over: ELLISON CR

E.CTR-10-T9NR4W, Henderson, IL

Built 1979 Load: 32.4 t ADT: 50

CH 1

Fair

Over: SMITH CREEK

W. CTR-24-T11NR4W, Henderson, IL

Built 1983 Load: 32.4 t ADT: 100

TR 204

Fair

Over: STREAM

SW-2-T12NR4W, Henderson, IL

Built 1983 Load: 32.4 t ADT: 25

TR 5

Fair

Over: HENDERSON CR

W.CTR-1-T12NR4W, Henderson, IL

Built 1995 Load: 32.4 t ADT: 25

TR 15

Fair

Over: HENDERSON CREEK

CTR-12-T12N,R4W, Henderson, IL

Built 1983 Load: 32.4 t ADT: 25

TR 17

Fair

Over: HENDERSON CREEK

SW-12-T12NR4W, Henderson, IL

Built 1988 Load: 32.4 t ADT: 25

TR 107

Fair

Over: STREAM

SW-8-T10NR4W, Henderson, IL

Built 1987 Load: 32.4 t ADT: 50

TR 113

Fair

Over: TRIB. SO. HEND'N CR.

SW-12-T10NR4W, Henderson, IL

Built 2002 Load: 32.4 t ADT: 50

TR 210

Fair

Over: SOUTH FORK CREEK

NW-36-T10NR4W, Henderson, IL

Built 1984 Load: 32.4 t ADT: 25

MS# 1800

Fair

Over: HENDERSON CREEK

SW-10-T10NR5W, Henderson, IL

Built 1981 Load: 32.4 t ADT: 150

TR 94

Fair

Over: STREAM

NE-26-T10R5W, Henderson, IL

Built 1978 Load: 32.4 t ADT: 50

TR 66

Fair

Over: DRAINAGE DITCH

CTR-28-T10NR5W, Henderson, IL

Built 1984 Load: 32.4 t ADT: 250

TR 193

Fair

Over: N. BR HONEY CREEK

CTR-12-T8NR6W, Henderson, IL

Built 1989 Load: 32.4 t ADT: 25

TR 1A (HANCOCK)

Fair

Over: TRIB OF CAMP CREEK

SE-36-T8NR6W, Henderson, IL

Built 1986 Load: 32.4 t ADT: 75

TR 177

Fair

Over: DIXON CREEK

S.CTR-19-T9NR4W, Henderson, IL

Built 1987 Load: 32.4 t ADT: 200

TR 138

Fair

Over: HONEY CREEK

SE-32-T9NR4W, Henderson, IL

Built 1983 Load: 32.4 t ADT: 75

TR 83

Fair

Over: GOOSE RUN CREEK

NE-36-T11NR5W, Henderson, IL

Built 1984 Load: 32.4 t ADT: 25

TR 138

Fair

Over: HONEY CREEK

NE-8-T8NR4W, Henderson, IL

Built 2001 Load: 32.4 t ADT: 25

TR 208A

Fair

Over: HONEY CREEK

NW-13-T8NR4W, Henderson, IL

Built 1999 Load: 32.4 t ADT: 25

Showing 8,101-8,150 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.