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

ST FRANCIS ROAD

Good

Over: UNION DITCH

1.2 MI E US-45, Will, IL

Built 1984 Load: 36.9 t ADT: 8,450

CH 5

Good

Over: SOUTH FORKSALINE

6 MI SOUTHILL RTE 13, Williamson, IL

Built 1983 Load: 36.9 t ADT: 50

7TH STREET

Good

Over: KEITH CREEK

0.6 MI S OF STATE, Winnebago, IL

Built 1986 Load: 36.9 t ADT: 3,550

FAI 172 SB

Good

Over: MILL CREEK

.8MI S I172/IL96, Adams, IL

Built 1981 Load: 37.3 t ADT: 4,875

TR 81

Good

Over: DORRIS CREEK

3 MI SE SORENTO, Bond, IL

Built 1985 Load: 37.3 t ADT: 50

TR 3

Good

Over: BR OF CROW CR

T14N -R8E-4PM-SEC 36, Bureau, IL

Built 1900 Load: 37.3 t ADT: 75

TR 152

Good

Over: Conover Ck

0.65 mi S TR 151, Cass, IL

Built 2021 Load: 37.3 t ADT: 25

TR 121 A

Good

Over: STREAM

1.0 MI N LEVERETT, Champaign, IL

Built 1973 Load: 37.3 t ADT: 175

TR 235 C

Good

Over: STREAM

2.5 MI NW SIDNEY, Champaign, IL

Built 1972 Load: 37.3 t ADT: 50

STEPHEN ST

Good

Over: I&M CANAL

3 M S I55 P8, Cook, IL

Built 1925 Load: 37.3 t ADT: 1,900

I-294 SB

Good

Over: UP RR

2.5 M SW ILL 19 P9, Cook, IL

Built 2022 Load: 37.3 t ADT: 86,550

IL 23

Good

Over: BR. KISHWAUKEE RIVER

1.3 MI. N. OF IL 64, DeKalb, IL

Built 2000 Load: 37.3 t ADT: 8,300

FAP 749(IL 133)

Good

Over: UNION DIST #6

1.75 MI W HINDSBORO, Douglas, IL

Built 1990 Load: 37.3 t ADT: 2,450

IL 56

Good

Over: DRAINAGE DITCH

400'E OF ORCHARD RD, DuPage, IL

Built 2012 Load: 37.3 t ADT: 22,900

REGENT DRIVE

Good

Over: GINGER CREEK

1500 FT E OF SUMMIT, DuPage, IL

Built 1968 Load: 37.3 t ADT: 275

TR-62

Good

Over: BROCKETT CREEK

2.5 MI NE GILMORE, Effingham, IL

Built 1990 Load: 37.3 t ADT: 100

TR-25

Good

Over: WOLF CREEK

3 MI E BEECHER CITY, Effingham, IL

Built 1992 Load: 37.3 t ADT: 50

TR-220

Good

Over: SUGAR FORK

3 MI N EFFINGHAM, Effingham, IL

Built 1991 Load: 37.3 t ADT: 375

FAS-708 (CH_12)

Good

Over: RAMSEY CREEK

3 MI W EBERLE, Effingham, IL

Built 1998 Load: 37.3 t ADT: 200

FAS-716 (CH-4)

Good

Over: MOCCASIN CREEK

5.9 MI N ST ELMO, Fayette, IL

Built 1995 Load: 37.3 t ADT: 625

CH 4 Elliott Road

Good

Over: Big Four Ditch Trib

690 N 1000 E, Ford, IL

Built 2015 Load: 37.3 t ADT: 500

FAS 1880

Good

Over: WHITE OAK CREEK

CROCKER ROAD, Franklin, IL

Built 1981 Load: 37.3 t ADT: 250

FAS 1886

Good

Over: TILLEY CK

NO 9 BLACKTOP, Franklin, IL

Built 1982 Load: 37.3 t ADT: 350

TR 135

Good

Over: MOSES LAKE

NE BENTON, Franklin, IL

Built 1900 Load: 37.3 t ADT: 400

TANAGER ROAD

Good

Over: TRIB TO LITTLE MUDDY RIV

2.5 MI N OF ROYALTON, Franklin, IL

Built 2023 Load: 37.3 t ADT: 25

ILL 97

Good

Over: PUTT CREEK TRIB.

2 MI N OF CUBA, Fulton, IL

Built 1993 Load: 37.3 t ADT: 900

TR-64

Good

Over: SILKWOOD BRANCH

1.5 MI S WALKERVILL, Greene, IL

Built 1982 Load: 37.3 t ADT: 25

FAP-776 (ILL-142)

Good

Over: TRIB CONTRARY CREEK

NCL OF BROUGHTON, Hamilton, IL

Built 1990 Load: 37.3 t ADT: 2,100

TR 44

Good

Over: PRAIRE CREEK

2.25MI NW GILMAN, Iroquois, IL

Built 1954 Load: 37.3 t ADT: 75

FAS 329/CH 10

Good

Over: WHISKY CREEK

2.95 MI E.OF IL 49, Iroquois, IL

Built 1999 Load: 37.3 t ADT: 500

TR 286

Good

Over: LITTLE BEAVER CREEK

1.75 mi S of St.Anne, Iroquois, IL

Built 2020 Load: 37.3 t ADT: 275

ROUTE 13 wb

Good

Over: BIG MUDDY RIVER

MURPHYSBORO, Jackson, IL

Built 2015 Load: 37.3 t ADT: 16,600

FAP-849 (ILL-142)

Good

Over: STREAM

.3 MI NW BELLE RIVE, Jefferson, IL

Built 2010 Load: 37.3 t ADT: 2,550

TR 415

Good

Over: Puncheon Creek

0.75MI E COUNTY LN, Jefferson, IL

Built 2017 Load: 37.3 t ADT: 75

FAS-830 (CH-17)

Good

Over: AUXIER CREEK

0.5 MI N BELLERIVE, Jefferson, IL

Built 1990 Load: 37.3 t ADT: 1,600

ILL 147

Good

Over: CEDAR CREEK

IN SIMPSON, Johnson, IL

Built 1937 Load: 37.3 t ADT: 550

RIVERSIDE DRIVE

Good

Over: PARKING GARAGE

E BANK FOX RIVER, Kane, IL

Built 1972 Load: 37.3 t ADT: 625

ILL 251

Good

Over: BAILEY CREEK

3.63 MI S OF ILL 71, LaSalle, IL

Built 1999 Load: 37.3 t ADT: 1,700

TR 561

Good

Over: BR.PRAIRIE CR.

N 6TH E 1060, LaSalle, IL

Built 1936 Load: 37.3 t ADT: 25

IL 26

Good

Over: CREEK

.25MI N UNION RD, Lee, IL

Built 2015 Load: 37.3 t ADT: 1,500

TR 154

Good

Over: SMITH BRANCH

1795N, 1900E, Livingston, IL

Built 2001 Load: 37.3 t ADT: 100

CH 63E

Good

Over: LAKE FORK CREEK

1 MI E BROADWELL, Logan, IL

Built 1977 Load: 37.3 t ADT: 300

FAP 714(IL 48)

Good

Over: STREAM

1 MI S OF BOODY, Macon, IL

Built 1991 Load: 37.3 t ADT: 4,500

FAP 320(IL 121)

Good

Over: STREAM

3.5 MI NW OF DECATUR, Macon, IL

Built 1997 Load: 37.3 t ADT: 6,450

TR 65A

Good

Over: STREAM

2.3 MI N OF OAKLEY, Macon, IL

Built 1993 Load: 37.3 t ADT: 125

TR 276

Good

Over: NASSA CREEK

3 M NE MODESTO, Macoupin, IL

Built 2020 Load: 37.3 t ADT: 10

IL 140

Good

Over: E Trib to Silver Crk

W end of Alahambra, Madison, IL

Built 2013 Load: 37.3 t ADT: 2,850

CH-30

Good

Over: ICG RR

S EDGE HELM, Marion, IL

Built 1991 Load: 37.3 t ADT: 75

CH 17

Good

Over: CAMP CREEK

SE-24-T5NR2W, McDonough, IL

Built 1978 Load: 37.3 t ADT: 25

MUSGRAVE PARKWAY

Good

Over: UNAMED TRIB COON CRK

0.4 MI W SEEMAN RD, McHenry, IL

Built 2005 Load: 37.3 t ADT: 100

Showing 22,751-22,800 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.