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 48A

Good

Over: TRIB N FORK SALINE R

1 MI N OF EQUALITY, Gallatin, IL

Built 1977 Load: 37.9 t ADT: 25

TR 7

Good

Over: LITTLE APPLE CREEK

4.5 MI NE ATHENSVILL, Greene, IL

Built 1995 Load: 37.9 t ADT: 25

TR 277

Good

Over: TAR HOLLOW CREEK

4 MI SO. ELDRED, Greene, IL

Built 1995 Load: 37.9 t ADT: 25

IL 47 FAP 326

Good

Over: DRAINAGE DITCH

0.95 MI S OF IL 113, Grundy, IL

Built 2009 Load: 37.9 t ADT: 7,100

TR-84 Ward Road

Good

Over: Murray Sluice

.12 MI N.CH 49C/GARD, Grundy, IL

Built 2002 Load: 37.9 t ADT: 75

FAS 881

Good

Over: RECTOR CREEK

4.5 MI SW WALPOLE, Hamilton, IL

Built 2001 Load: 37.9 t ADT: 325

IL 96

Good

Over: GLEN CREEK

.3M S WARSAW SPUR, Hancock, IL

Built 1994 Load: 37.9 t ADT: 2,000

FAP 685 (IL 9/IL 9

Good

Over: Branch Camp Creek

.4 mi E IL 94, Hancock, IL

Built 2015 Load: 37.9 t ADT: 1,000

CH 22

Good

Over: WHITE OAK CREEK

.75 M W TIOGA, Hancock, IL

Built 2008 Load: 37.9 t ADT: 100

FAS 1324/OLD US 45

Good

Over: TRIB OF LANGAN CREEK

1.2 MI S OF CHEBANSE, Iroquois, IL

Built 1987 Load: 37.9 t ADT: 1,900

FAS 323 ONARGA RD

Good

Over: SPRING CREEK

5.62 MI W OF ILL 49, Iroquois, IL

Built 1989 Load: 37.9 t ADT: 450

TR 251

Good

Over: SUGAR CREEK

2 MI S OF WOODLAND, Iroquois, IL

Built 1987 Load: 37.9 t ADT: 200

ILL 13 WB

Good

Over: CRAB ORCHARD CR OVFL

1.4 MI E CARBONDALE, Jackson, IL

Built 1995 Load: 37.9 t ADT: 25,800

CH 8-BEAUCOUP RD

Good

Over: TRIB-RATTLESNAKE CR

1.25 MI N IL 4, Jackson, IL

Built 2002 Load: 37.9 t ADT: 225

TR 187 (SMOKEY ROA

Good

Over: STREAM

.22M W JONES RIDGE R, Jackson, IL

Built 2005 Load: 37.9 t ADT: 25

E. ACADEMY ROAD

Good

Over: BALD HILL CREEK

1 MI W OF SCHELLER, Jefferson, IL

Built 2016 Load: 37.9 t ADT: 50

MILL ST.

Good

Over: FOX RIVER

JUST W. OF ILL 25, Kane, IL

Built 1984 Load: 37.9 t ADT: 6,500

IL 31

Good

Over: JELKES CREEK

1 M N OF I-90, Kane, IL

Built 1992 Load: 37.9 t ADT: 25,600

IL 64

Good

Over: VIRGIL DITCH #3

4.2 M W OF IL 47, Kane, IL

Built 1993 Load: 37.9 t ADT: 6,850

IL 64

Good

Over: DRAINAGE DITCH

0.1 E OF IL 47, Kane, IL

Built 2012 Load: 37.9 t ADT: 4,900

TR 3

Good

Over: FORKED CR.

3.9 MI NE OF DESELM, Kankakee, IL

Built 1984 Load: 37.9 t ADT: 50

TR1

Good

Over: NO. BR. FORKED CREEK

4 MI NW DESELM, Kankakee, IL

Built 1983 Load: 37.9 t ADT: 50

FAS 395 - CH 17

Good

Over: TRIB TO SPOON RIVER

SW-18-T10NR4E, Knox, IL

Built 2020 Load: 37.9 t ADT: 75

SHERIDAN RD

Good

Over: MIDDLETON RAVINE

HIGHLAND PRK, Lake, IL

Built 1929 Load: 37.9 t ADT: 2,500

IL 173

Good

Over: FOX RIVER

4.2 M W IL 83, Lake, IL

Built 1993 Load: 37.9 t ADT: 8,500

ILL 179

Good

Over: MOON CREEK

0.16 MI S OF ILL 17, LaSalle, IL

Built 1984 Load: 37.9 t ADT: 300

FAS 174N/CH 41

Good

Over: BRANCH INDIAN CREEK

E1351, N4742, LaSalle, IL

Built 2002 Load: 37.9 t ADT: 200

FAS-801

Good

Over: BRUSHY CREEK

WEST EDGE BIRDS, Lawrence, IL

Built 1969 Load: 37.9 t ADT: 550

CH 22 FAS 473

Good

Over: INDIAN CREEK

2.5 MI W OF STRAWN, Livingston, IL

Built 1963 Load: 37.9 t ADT: 150

TR 137 1600N Road

Good

Over: Morehouse Creek

670 E, 1600 N, Livingston, IL

Built 2021 Load: 37.9 t ADT: 75

IL 10

Good

Over: SALT SPRING BRANCH

1.2M E IL 121, Logan, IL

Built 1991 Load: 37.9 t ADT: 2,200

FAS 1774

Good

Over: TRIB BRAINARDS BR

2 M N LINCOLN, Logan, IL

Built 2006 Load: 37.9 t ADT: 1,700

ILL 108

Good

Over: BEAR CREEK

2.2MI E JCT IL 111, Macoupin, IL

Built 1929 Load: 37.9 t ADT: 1,350

IL 138

Good

Over: BIG BRANCH

.3M W IL 4(MT CLARE), Macoupin, IL

Built 1991 Load: 37.9 t ADT: 1,100

TR 473

Good

Over: INDIAN CREEK

2 MI SW BUNKER HILL, Macoupin, IL

Built 2008 Load: 37.9 t ADT: 150

FAI 70

Good

Over: CANTEEN CK

1 MI E ILL 159, Madison, IL

Built 1939 Load: 37.9 t ADT: 45,600

CH-31

Good

Over: BRANCH SKILLET FORK

6 MI E KINMUNDY, Marion, IL

Built 1982 Load: 37.9 t ADT: 75

TR 65

Good

Over: TRIB TO MASSAC CR

1/4 MI W OF TR 86, Massac, IL

Built 1996 Load: 37.9 t ADT: 50

US 67

Good

Over: CARTER CREEK

1.3 MI S OF INDUSTRY, McDonough, IL

Built 2007 Load: 37.9 t ADT: 2,600

TR-117

Good

Over: KEPPLE CREEK

CTR-16-T6NR1W, McDonough, IL

Built 2018 Load: 37.9 t ADT: 50

ALGONQUIN ROAD

Good

Over: WOODS CREEK

.4M W OF PYOTT RD, McHenry, IL

Built 2004 Load: 37.9 t ADT: 31,600

UNION ROAD / CHT-6

Good

Over: S BR KISHWAUKEE RIV

0.5 MI S IL RTE 176, McHenry, IL

Built 2011 Load: 37.9 t ADT: 1,800

LAWRENCE RD

Good

Over: TRIB LAWRENCE CREEK

1 MI N OF RAMER RD, McHenry, IL

Built 2016 Load: 37.9 t ADT: 850

TR 290B

Good

Over: POPE CREEK

N CTR-14-T14NR1W, Mercer, IL

Built 1998 Load: 37.9 t ADT: 25

NOKOMIS BLACKTOP

Good

Over: MIDDLE FK SHOAL CR

7.4M E IL 127, Montgomery, IL

Built 1994 Load: 37.9 t ADT: 700

IL 16

Good

Over: LITTLE CREEK TRIB

1.3MI NE SCHRAM CITY, Montgomery, IL

Built 1998 Load: 37.9 t ADT: 2,300

TOWER RD

Good

Over: EAST FORK CREEK

3 MI. N. OF BYRON, Ogle, IL

Built 1996 Load: 37.9 t ADT: 1,550

ILL 90 AND 91

Good

Over: PRINCE CREEK

.25 MI E PRINCEVILLE, Peoria, IL

Built 2017 Load: 37.9 t ADT: 2,750

TR 190

Good

Over: WHITE WALNUT CR TRIB

3 MI NE P'VILLE, Perry, IL

Built 1994 Load: 37.9 t ADT: 150

FAS 538(CH 5)

Good

Over: GOOSE CREEK

VILLAGE OF DELAND, Piatt, IL

Built 1979 Load: 37.9 t ADT: 1,600

Showing 22,901-22,950 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.