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

IL 107

Poor

Over: MIDDLE FORK MCKEE CR

.14M S 104, Pike, IL

Built 1956 Load: 31.8 t ADT: 775

I 57 NB & US 51 NB

Poor

Over: LITTLE CREEK

1.5 MI S UNION CO, Pulaski, IL

Built 1964 Load: 31.8 t ADT: 6,900

ILL 89

Poor

Over: CLEAR CREEK TRIB

2.79 MI N OF ILL 18, Putnam, IL

Built 1928 Load: 31.8 t ADT: 1,700

27TH ST.-MOLINE

Poor

Over: STREAM

.19MI N JOHN DEER RD, Rock Island, IL

Built 1937 Load: 31.8 t ADT: 10,050

TR 32

Poor

Over: LOST CREEK

2 MI NE BEARDSTOWN, Cass, IL

Built 1968 Load: 32.1 t ADT: 75

FAP 725(EB)

Poor

Over: Canadian National Railwa

W OF CHAMPAIGN, Champaign, IL

Built 1966 Load: 32.1 t ADT: 10,900

FAP 725 (WB)

Poor

Over: CN Railwy & Copper Sloug

W OF CHAMPAIGN, Champaign, IL

Built 1966 Load: 32.1 t ADT: 10,900

TR 17

Poor

Over: SANGAMON RIVER

4.5 MI NW FISHER, Champaign, IL

Built 1984 Load: 32.1 t ADT: 75

CH 6-FAS 642

Poor

Over: BRUSHY BRANCH

6.5 MI E TAYLORVILLE, Christian, IL

Built 1915 Load: 32.1 t ADT: 1,300

US 40(FAS 1707)

Poor

Over: EMBARRAS RIVER

.7 MI W OF GREENUP, Cumberland, IL

Built 1950 Load: 32.1 t ADT: 1,800

SUYDAM ROAD

Poor

Over: PAW PAW CREEK

180N 200E, DeKalb, IL

Built 1983 Load: 32.1 t ADT: 200

WALNUT ST

Poor

Over: BIG CREEK

ON WALNUT E OF AVE F, Fulton, IL

Built 1970 Load: 32.1 t ADT: 850

TR70 SCOTTSCHOOL R

Poor

Over: WEST FORK NETTLE CR

.18 MI S HOGE RD, Grundy, IL

Built 1981 Load: 32.1 t ADT: 225

TR 6A (WARREN)

Poor

Over: CEDAR CREEK

E.CTR-25-T12NR4W, Henderson, IL

Built 1985 Load: 32.1 t ADT: 75

LASHER ROAD

Poor

Over: WELCH CREEK

2.0 MI SW KANEVILLE, Kane, IL

Built 1955 Load: 32.1 t ADT: 100

TR-173 (Scott Rd)

Poor

Over: Malgren Drain

1.5 MI NW BIG ROCK, Kane, IL

Built 1978 Load: 32.1 t ADT: 175

FARNSWORTH AVE.

Poor

Over: WAUBONSEE CR.TRIB.

0.6M.N.OF US-34, Kane, IL

Built 1989 Load: 32.1 t ADT: 3,300

CH 15 INDIAN HEAD

Poor

Over: MAIN DITCH

1.0 MI S VAN PETTEN, Lee, IL

Built 1966 Load: 32.1 t ADT: 275

DRY GULCH RD

Poor

Over: TRIB OF GREEN RIVER

1.2 MI S MORMAN RD, Lee, IL

Built 1979 Load: 32.1 t ADT: 225

203SB RMP TO 55/70

Poor

Over: DRNG TO CAHOKIA CNL

S of Gateway Racetrk, St. Clair, IL

Built 1960 Load: 32.1 t ADT: 7,600

ILL 15 & 4

Poor

Over: KASKASKIA RIVER

0.2 M E JCT ILL 4, St. Clair, IL

Built 1946 Load: 32.1 t ADT: 3,600

IL 9 (FAP 697)

Poor

Over: N FORK VERMILION RIV

2.5 MI E OF IL 1, Vermilion, IL

Built 1967 Load: 32.1 t ADT: 1,350

1500 E

Poor

Over: MCHENRY SLOUGH

3 MI N OF EPWORTH, White, IL

Built 2008 Load: 32.1 t ADT: 225

FAI 172 SB

Poor

Over: BURTON CREEK

1.4MI S I172/IL96, Adams, IL

Built 1980 Load: 32.4 t ADT: 4,875

TR 284

Poor

Over: BUREAU CREEK

1.5 M NW OF DOVER, Bureau, IL

Built 1984 Load: 32.4 t ADT: 50

TR 27

Poor

Over: WEST PANTHER CREEK

1.1 MI EASTRTE 96, Calhoun, IL

Built 1983 Load: 32.4 t ADT: 50

ARGO FAY ROAD

Poor

Over: STREAM

1.3 MI E JCT ILL 84, Carroll, IL

Built 1937 Load: 32.4 t ADT: 2,350

E MILLEDGEVILLE RT

Poor

Over: ELKHORN CREEK

E EDGE MILLEDGEVILLE, Carroll, IL

Built 1939 Load: 32.4 t ADT: 1,050

FAS 1535 (CH9)

Poor

Over: MID FK VERMILLION R

5.6 MI NW PENFIELD, Champaign, IL

Built 1984 Load: 32.4 t ADT: 150

TR 30 C

Poor

Over: STREAM

.5 MI S OF FOOSLAND, Champaign, IL

Built 1979 Load: 32.4 t ADT: 50

TR 550ICOBBLEFIELD

Poor

Over: COPPER SLOUGH

4 MI SW OF CHAMPAIGN, Champaign, IL

Built 1990 Load: 32.4 t ADT: 900

TR 130

Poor

Over: STREAM

5.2 MI NE FISHER, Champaign, IL

Built 1991 Load: 32.4 t ADT: 225

TR 35

Poor

Over: DRAINAGE DITCH

3 MI NW RANTOUL, Champaign, IL

Built 1997 Load: 32.4 t ADT: 75

FAP-813 (Olymp. Dr

Poor

Over: IC Railroad

0.9 Mi E of CH 21, Champaign, IL

Built 2016 Load: 32.4 t ADT: 2,300

TR 69C

Poor

Over: Spoon River

1.1 mi SE of Gifford, Champaign, IL

Built 2014 Load: 32.4 t ADT: 50

IL 29

Poor

Over: MAIN DRAINAGE DITCH

2.5M NW WASH ST BEND, Christian, IL

Built 1924 Load: 32.4 t ADT: 3,750

TR 18

Poor

Over: BEAR CREEK

3 MI E HARVEL, Christian, IL

Built 1978 Load: 32.4 t ADT: 20

TR 23

Poor

Over: Kaskaskia River

2.8 Mi. W Humboldt, Coles, IL

Built 2016 Load: 32.4 t ADT: 100

TR 120

Poor

Over: Flat Branch

2.9 mi. E Humboldt, Coles, IL

Built 2015 Load: 32.4 t ADT: 100

TR 318

Poor

Over: HOG BRANCH

2 MI NE OF OAKLAND, Coles, IL

Built 2009 Load: 32.4 t ADT: 50

WABASH AVE

Poor

Over: MAIN BR CHICAGO RIV

44 E & 326 N, Cook, IL

Built 1930 Load: 32.4 t ADT: 7,350

LaSalle St.

Poor

Over: Parking Area

140 W. and 330 N., Cook, IL

Built 1928 Load: 32.4 t ADT: 18,600

103RD ST

Poor

Over: NORFOLK SOUTHERN RR

10300S&1800E_2000E, Cook, IL

Built 1938 Load: 32.4 t ADT: 19,800

Lane Court

Poor

Over: 63rd Street Ditch

.25 Mi W of Madison, DuPage, IL

Built 1997 Load: 32.4 t ADT: 100

PEBBLE CREEK DR.

Poor

Over: WILLOW WAY CREEK

W.OF LEASK LANE, DuPage, IL

Built 1980 Load: 32.4 t ADT: 400

FAI-57 NB

Poor

Over: GREEN CREEK

1.5 MI S SHELBY C L, Effingham, IL

Built 1964 Load: 32.4 t ADT: 9,450

MADISON STREET 300

Poor

Over: CREEK

FARINA, Fayette, IL

Built 1930 Load: 32.4 t ADT: 225

ILL 154

Poor

Over: REND LAKE

2.5 MI W I-57, Franklin, IL

Built 1967 Load: 32.4 t ADT: 2,650

PERRY HILL RD-TR 4

Poor

Over: OTTER CREEK

SE-29-T4NR2E, Fulton, IL

Built 1981 Load: 32.4 t ADT: 75

TR 106 ASHTON RD

Poor

Over: E FK NETTLE CREEK

0.08 MI S NELSON RD, Grundy, IL

Built 1986 Load: 32.4 t ADT: 225

Showing 26,551-26,600 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.