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-110 DWIGHT RD

Poor

Over: JOHNNY RUN

.08 MI N MINE RD, Grundy, IL

Built 1981 Load: 32.4 t ADT: 150

GOODFARM RD TR-155

Poor

Over: TRIB E FK MAZON RIV

.13 MI E HALPIN RD, Grundy, IL

Built 1980 Load: 32.4 t ADT: 50

TR 161 STONEWALL R

Poor

Over: TRIB E FK MAZON R

.06 MI W KANKAKEE RD, Grundy, IL

Built 1988 Load: 32.4 t ADT: 75

TR-384

Poor

Over: Mud Creek

3.0 MI NE ATKINSON, Henry, IL

Built 1969 Load: 32.4 t ADT: 50

TR 257

Poor

Over: MUD CREEK

5.5 M NW KEWANEE, Henry, IL

Built 1982 Load: 32.4 t ADT: 25

CH 34

Poor

Over: KING CREEK

2.5 M SE OF ANNAWAN, Henry, IL

Built 1985 Load: 32.4 t ADT: 200

FAI-57 NB

Poor

Over: IC RR

8.98 MI S ASHKUM INT, Iroquois, IL

Built 1967 Load: 32.4 t ADT: 9,050

FAS-330 CH31

Poor

Over: IROQUOIS RIVER

1MI N WATSEKA ON 31, Iroquois, IL

Built 1965 Load: 32.4 t ADT: 1,200

C.H. 1

Poor

Over: PINEY BRANCH

N LINE SEC 26-7-5, Jackson, IL

Built 1977 Load: 32.4 t ADT: 225

FAS 774

Poor

Over: OTTER CREEK

2M S FIELDON, Jersey, IL

Built 1978 Load: 32.4 t ADT: 225

TR 195

Poor

Over: MILL CREEK

1.5 M N OF ELSAH, Jersey, IL

Built 1977 Load: 32.4 t ADT: 100

FAS 396

Poor

Over: SWAB RUN CREEK

SW-35-T10NR4E, Knox, IL

Built 1996 Load: 32.4 t ADT: 325

FAS 395-CH 17

Poor

Over: SPOON RIVER

5 MI SE OF GILSON, Knox, IL

Built 2000 Load: 32.4 t ADT: 125

FAU-1234 (OAK SP R

Poor

Over: DES PLAINES RIVER

.75 M E OF ILL 21, Lake, IL

Built 1967 Load: 32.4 t ADT: 2,800

WALDEN LANE

Poor

Over: RAVINE

WALDEN AT WESTLEIH, Lake, IL

Built 1914 Load: 32.4 t ADT: 175

Powell St.

Poor

Over: Coal Run Creek

R3E, T31N 3rd PM, LaSalle, IL

Built 1984 Load: 32.4 t ADT: 175

TR 39

Poor

Over: DRAINAGE DITCH

3535 E, 2900 N, Livingston, IL

Built 1965 Load: 32.4 t ADT: 275

TR 107

Poor

Over: ROOKS CREEK

1020 E, 2100 N, Livingston, IL

Built 1925 Load: 32.4 t ADT: 225

FAS 1362A/CH 9

Poor

Over: TRIB TO VERMILION R

5.5 MI NW CHATSWORTH, Livingston, IL

Built 1976 Load: 32.4 t ADT: 200

CH 18(SCHOOL RD)

Poor

Over: FRIENDS CREEK

2 MI N OF ARGENTA, Macon, IL

Built 1988 Load: 32.4 t ADT: 125

FAU 7406 (TR 217)

Poor

Over: Trib Big Creek

1 MI E MT ZION, Macon, IL

Built 2005 Load: 32.4 t ADT: 1,800

FAU 7431

Poor

Over: TRIB STEVENS CREEK

VILLAGE OF FORSYTH, Macon, IL

Built 2011 Load: 32.4 t ADT: 550

FAS 0736

Poor

Over: WOOD RIVER

1.5 MI. W.BUNKERHILL, Macoupin, IL

Built 1932 Load: 32.4 t ADT: 1,900

HILLSBORO MT OLIVE

Poor

Over: EAST BRANCH LAKE FK

0.8 MI E WALSHVILLE, Montgomery, IL

Built 1960 Load: 32.4 t ADT: 500

TR 166

Poor

Over: MAUVAISE TERRE CR

NE CL JACKSONVILLE, Morgan, IL

Built 1996 Load: 32.4 t ADT: 175

TR 5

Poor

Over: CREEK

2.5 MI NE LOVINGTON, Moultrie, IL

Built 1984 Load: 32.4 t ADT: 50

EB I-474

Poor

Over: BNSF RR - KICKAPOO CR

S1/2 SEC 26 KICKAPOO, Peoria, IL

Built 1978 Load: 32.4 t ADT: 13,000

KOERNER RD-CH R47

Poor

Over: BR OF KICKAPOO CREEK

SEC 15 KICK. TWP, Peoria, IL

Built 2003 Load: 32.4 t ADT: 2,300

TR 207

Poor

Over: STREAM

1.5 NE LA PLACE, Piatt, IL

Built 1978 Load: 32.4 t ADT: 25

I-72 / US 36

Poor

Over: MISS R/BNRR/NSRR/ST

HANNIBAL, MO, Pike, IL

Built 1999 Load: 32.4 t ADT: 16,500

TR 3A

Poor

Over: TUCKER BRANCH

3 M N FISHOOK, Pike, IL

Built 2007 Load: 32.4 t ADT: 25

IL 155

Poor

Over: stream

in Prairie du Rocher, Randolph, IL

Built 1957 Load: 32.4 t ADT: 1,050

US 45

Poor

Over: NORTH FORK SALINE RI

1 MI N OF TEXAS CITY, Saline, IL

Built 1953 Load: 32.4 t ADT: 3,750

CH 4

Poor

Over: TRIB TO RECTOR CREEK

2 MI N OF RALEIGH, Saline, IL

Built 1983 Load: 32.4 t ADT: 175

FAS 1897-CH 25

Poor

Over: STREAM

1.5 MI E OF ELDORADO, Saline, IL

Built 1988 Load: 32.4 t ADT: 225

FOREST BLVD(FAU915

Poor

Over: SCHOENBERGER CR.

FOREST BLVD WASH PK, St. Clair, IL

Built 1949 Load: 32.4 t ADT: 775

NORTH PEOTONE RD

Poor

Over: SO BR FORKED CREEK

1.9 MI E OF US 35,52, Will, IL

Built 1994 Load: 32.4 t ADT: 1,800

ILL 13 EB

Poor

Over: CRABORCHARD LAKE

1.1 MI E JACKSON CO, Williamson, IL

Built 1964 Load: 32.4 t ADT: 25,600

11TH STREET

Poor

Over: KEITH CREEK

0.52 N BROADWAY, Winnebago, IL

Built 1915 Load: 32.4 t ADT: 9,300

FAS 943

Poor

Over: SANDY CREEK W FORK

0.1 MI S OF DISWOOD, Alexander, IL

Built 1983 Load: 32.7 t ADT: 1,100

FAS 573

Poor

Over: PANTHER CREEK

0.2 MI E OF ILL 78, Cass, IL

Built 1984 Load: 32.7 t ADT: 175

FRANKLIN-ORLEANS S

Poor

Over: MAIN BR CHICAGO RIV

302 N. FRANKLIN ST., Cook, IL

Built 1920 Load: 32.7 t ADT: 16,550

MOTEL ROAD

Poor

Over: BR S BR KISHWAUKEE R

2610N 1200E, DeKalb, IL

Built 1980 Load: 32.7 t ADT: 525

HOWISON RD

Poor

Over: LITTLE ROCK CREEK

1210N 1200E, DeKalb, IL

Built 1961 Load: 32.7 t ADT: 275

US 20 BY PASS

Poor

Over: FOX RIVER

0.3 M W IL 25, Kane, IL

Built 1960 Load: 32.7 t ADT: 47,200

TR-18-A

Poor

Over: SANDY CREEK

E 1ST N 1290, LaSalle, IL

Built 1963 Load: 32.7 t ADT: 10

FAP-332 (ILL-1)

Poor

Over: EMBARRAS R OVERFLOW

1 MI N US-50, Lawrence, IL

Built 1964 Load: 32.7 t ADT: 5,400

TOWNHALL ROAD

Poor

Over: BR OF GREEN RIVER

0.4 M S OF US RT 30, Lee, IL

Built 1968 Load: 32.7 t ADT: 10

TOWNSHIP ROAD 151

Poor

Over: CREEK

2.4 M ENE STD CITY, Macoupin, IL

Built 1981 Load: 32.7 t ADT: 50

ILL 3

Poor

Over: HORSE CREEK OVERFLOW

2.6 MI S RED BUD, Randolph, IL

Built 1952 Load: 32.7 t ADT: 4,650

Showing 26,601-26,650 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.