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 269(JACKSON RD)

Structurally Deficient

Over: DRY BRANCH

2 MI W WALKER, Macon, IL

Built 1981 Load: 19.8 t ADT: 35

FAS 736

Structurally Deficient

Over: GIRDER BR

5 MI. E. BRIGHTON, Macoupin, IL

Built 1919 Load: 19.8 t ADT: 2,650

TR 225

Structurally Deficient

Over: BR. POPE CREEK

E.CTR-4-T13NR3W, Mercer, IL

Built 1976 Load: 19.8 t ADT: 100

EB US 150

Structurally Deficient

Over: ILLINOIS RIVER & T&P RR

NE END OF PEORIA, Tazewell, IL

Built 1948 Load: 19.8 t ADT: 30,000

TR 229

Structurally Deficient

Over: EAST BUREAU CREEK

2 MI S OF MALDEN, Bureau, IL

Built 1967 Load: 20.1 t ADT: 25

TR 62

Structurally Deficient

Over: LOST CREEK

1.5 MI E BLUFF SPR., Cass, IL

Built 1971 Load: 20.1 t ADT: 50

N LaSalle St

Structurally Deficient

Over: Main Br Chicago Rv

307 N LASALLE ST., Cook, IL

Built 1928 Load: 20.1 t ADT: 18,600

TR 400

Structurally Deficient

Over: LA MOINE RIVER

3.5 MI NE LAHARPE, Hancock, IL

Built 1967 Load: 20.1 t ADT: 50

STAAB ROAD

Structurally Deficient

Over: HICKS HOLLOW CREEK

WLINENE1/43T10NR8E, Peoria, IL

Built 1956 Load: 20.1 t ADT: 50

I-255

Structurally Deficient

Over: NSRR

0.5 mi S of IL 15, St. Clair, IL

Built 1980 Load: 20.1 t ADT: 41,500

TR 25

Structurally Deficient

Over: SANGAMON RIVER

3.5 MI N FISHER, Champaign, IL

Built 1982 Load: 20.4 t ADT: 50

N. BALDWIN RD.

Structurally Deficient

Over: BUFFALO CREEK

0.35 M N OF DUNDEE, Cook, IL

Built 1970 Load: 20.4 t ADT: 6,800

TR 396

Structurally Deficient

Over: TRIB TO SUGAR CR

.25 MI W STOCKLAND, Iroquois, IL

Built 1907 Load: 20.4 t ADT: 50

TR-156

Structurally Deficient

Over: DAVIDSON CREEK

4 MI NW SALEM, Marion, IL

Built 1909 Load: 20.4 t ADT: 25

TR 256

Structurally Deficient

Over: INDIAN CR

2.5 MI SW YATESVILLE, Morgan, IL

Built 1967 Load: 20.4 t ADT: 50

TR 213A

Structurally Deficient

Over: BN RR

3 MI SW OF BADER, Schuyler, IL

Built 1900 Load: 20.4 t ADT: 25

WASH. ST(MS 8160)

Structurally Deficient

Over: GRAPE CR

S SIDE OF TILTON, Vermilion, IL

Built 1939 Load: 20.4 t ADT: 700

TR 390

Structurally Deficient

Over: BRUSH CREEK

1.5 MI. E. ARLINGTON, Bureau, IL

Built 1964 Load: 20.7 t ADT: 25

CORTLAND ST

Structurally Deficient

Over: N BR CHICAGO RIV

1440 W CORTLAND, Cook, IL

Built 1902 Load: 20.7 t ADT: 18,600

TR 150C

Structurally Deficient

Over: BRANCH LITTLE PIASA

.5 MI. W. NEW DELHI, Jersey, IL

Built 1975 Load: 20.7 t ADT: 150

CH-2 (DEWEY AVE)

Structurally Deficient

Over: HUGHLETTS BRANCH

N LIMIT OF GALENA, Jo Daviess, IL

Built 1952 Load: 20.7 t ADT: 425

LEE RD/ TR 89

Structurally Deficient

Over: SUGAR CK

3.0MI N AVISTON, Madison, IL

Built 1965 Load: 20.7 t ADT: 275

BLACK QUARTER TR 1

Structurally Deficient

Over: SILVER CR

1.0 MI N ILL 13, St. Clair, IL

Built 1961 Load: 20.7 t ADT: 50

BEECHER AVENUE

Structurally Deficient

Over: W. BR. DUPAGE RIVER

0.25 M W WINFIELD RD, DuPage, IL

Built 1956 Load: 21.1 t ADT: 475

FAP-367 (Army TR R

Structurally Deficient

Over: W BR DUPAGE RIVER

1.6 MI E IL 59, DuPage, IL

Built 1987 Load: 21.1 t ADT: 9,500

US 60 & 62

Structurally Deficient

Over: MISSISSIPPI R

CAIRO, Alexander, IL

Built 1929 Load: 21.4 t ADT: 3,450

TR 330

Structurally Deficient

Over: E. BUREAU CR.

2 MI. N.E. OF MALDEN, Bureau, IL

Built 1965 Load: 21.4 t ADT: 25

31ST STREET

Structurally Deficient

Over: METRA ELEC & CN

3100 S & 628 E, Cook, IL

Built 1921 Load: 21.4 t ADT: 7,550

CANAL ST

Structurally Deficient

Over: UNION STATION

500W & 200S TO 300S, Cook, IL

Built 1926 Load: 21.4 t ADT: 5,100

ROBIN RD - TR 459

Structurally Deficient

Over: JAKE CREEK

SW-19-T4NR2E, Fulton, IL

Built 1966 Load: 21.4 t ADT: 25

TR 168(CARR RD)

Structurally Deficient

Over: FINLEY CREEK

5.1 MI E OF MACON, Macon, IL

Built 1981 Load: 21.4 t ADT: 25

TR 282A

Structurally Deficient

Over: LAKE FORK

3 MI N PANA, Christian, IL

Built 1927 Load: 21.7 t ADT: 20

WOLF RD

Structurally Deficient

Over: FLAG CREEK

0.9 M N 79TH P10, Cook, IL

Built 1960 Load: 21.7 t ADT: 9,850

TR-71 (ALDRICH RD)

Structurally Deficient

Over: S BR KISHWAUKEE RV

2850N 1185E, DeKalb, IL

Built 1950 Load: 21.7 t ADT: 75

SOUTH ST RD

Structurally Deficient

Over: FRANKLINVILLE CR

0.1MI E OF ROSE FM, McHenry, IL

Built 1983 Load: 21.7 t ADT: 2,050

FAP-817 (IL-15)

Structurally Deficient

Over: Lunte Creek

3.6 MI W OF IL 127, Washington, IL

Built 1921 Load: 21.7 t ADT: 2,200

TR 128 S PROWANT R

Structurally Deficient

Over: BRANCH ROCK CREEK

2 MI SE CHADWICK, Carroll, IL

Built 1962 Load: 22.0 t ADT: 25

TR 37

Structurally Deficient

Over: LONE TREE CREEK

2 MI SW OF FOOSLAND, Champaign, IL

Built 1971 Load: 22.0 t ADT: 75

FAU-1369 (Schick R

Structurally Deficient

Over: W Br. DuPage River

1.3 MI E. IL59, DuPage, IL

Built 1961 Load: 22.0 t ADT: 11,400

Old US 34

Structurally Deficient

Over: S HENDERSON CREEK

0.3 MI E OF ILL 94, Henderson, IL

Built 1921 Load: 22.0 t ADT: 200

CO. HWY. 15

Structurally Deficient

Over: LONETREE DITCH

NW-30-T10NR5W, Henderson, IL

Built 1979 Load: 22.0 t ADT: 575

TR97

Structurally Deficient

Over: DRAINAGE DITCH

1.25 MI W ILL 1, Iroquois, IL

Built 1987 Load: 22.0 t ADT: 25

MS6240 (INDIANA AV

Structurally Deficient

Over: MENDOTA CR

100 FT N BURLINGTON, LaSalle, IL

Built 1916 Load: 22.0 t ADT: 100

STERLING ROAD

Structurally Deficient

Over: BR OF GREEN RIVER

0.2 M E OF US RT 52, Lee, IL

Built 1968 Load: 22.0 t ADT: 375

TR-19 Midgely Neis

Structurally Deficient

Over: Little Silver Creek

0.1 MI E ILL 4, St. Clair, IL

Built 1957 Load: 22.0 t ADT: 250

TR 312

Structurally Deficient

Over: STREAM

3 MI SE OF ST JOSEPH, Champaign, IL

Built 1974 Load: 22.4 t ADT: 200

TR 267

Structurally Deficient

Over: CLEAR CREEK

3MI NW MORRISONVILLE, Christian, IL

Built 1985 Load: 22.4 t ADT: 50

KEDZIE AVE

Structurally Deficient

Over: CAL SAG CHANNEL

1.5 M N IL 83, Cook, IL

Built 1966 Load: 22.4 t ADT: 14,700

FAP-116 (ILL-130)

Structurally Deficient

Over: FOX RIVER

.5 MI N STE MARIE RD, Jasper, IL

Built 1928 Load: 22.4 t ADT: 4,400

I 64 WB

Structurally Deficient

Over: CASEY FK & UN PAC RR

.2 MI E ILL-37, Jefferson, IL

Built 1972 Load: 22.4 t ADT: 6,350

Showing 27,351-27,400 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.