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 192

Good

Over: MAIDS RUN

SE-12-T13NR3W, Mercer, IL

Built 2021 Load: 56.1 t ADT: 10

GRANGE RD

Good

Over: WALNUT CREEK

SE-27-T10NR5E, Peoria, IL

Built 1975 Load: 56.1 t ADT: 10

TR 18

Good

Over: TRIB TO BOAR CREEK

1 MI N-VILLA RIDGE, Pulaski, IL

Built 1987 Load: 56.1 t ADT: 150

Happ Road

Good

Over: Skokie River

0.5 Mi S of Winnetka, Cook, IL

Built 2017 Load: 56.4 t ADT: 3,700

WHEELER DRIVE

Good

Over: TINLEY CREEK

SEE REMARKS, Cook, IL

Built 1976 Load: 56.4 t ADT: 1,400

TR 9

Good

Over: Little Creek

4 Mi. NNE Ramsey, Fayette, IL

Built 2018 Load: 56.4 t ADT: 100

IL 9

Good

Over: W. Br. Drummer Creek

1.04 MI W OF IL 47, Ford, IL

Built 2013 Load: 56.4 t ADT: 1,500

IL 116 (FAP 681)

Good

Over: TRIB TO KELLY CREEK

0.5 MI E OF IL 115, Ford, IL

Built 2011 Load: 56.4 t ADT: 775

TR 245A

Good

Over: So Fork Vermilion Rv

4 Mi. S. of Chatswor, Livingston, IL

Built 2020 Load: 56.4 t ADT: 50

IL 255 SB

Good

Over: UPRR, KCSRR

0.25mi NW of Humbert Rd, Madison, IL

Built 2009 Load: 56.4 t ADT: 9,850

IL 160

Good

Over: SILVER CREEK

.6 MI S.OF GRANTFORK, Madison, IL

Built 2006 Load: 56.4 t ADT: 2,100

FAU 8998/SEMINARY

Good

Over: TRIB TO HONEY BR

1.0 MI N OF ALTON, Madison, IL

Built 1980 Load: 56.4 t ADT: 5,300

US 51 NB

Good

Over: SUGAR CREEK

0.8 M N OF ILL 9, McLean, IL

Built 2015 Load: 56.4 t ADT: 11,300

FAP 327 (US 50)

Good

Over: Big Muddy Creek

Clay-Richland Co. Ln, Richland, IL

Built 2017 Load: 56.4 t ADT: 4,000

COUNTY HIGHWAY 4

Good

Over: ZUMA CREEK

2 MI SW OF JOSLIN, Rock Island, IL

Built 1978 Load: 56.4 t ADT: 175

IL 1 US 150 (FAP 3

Good

Over: Norfolk Southern Railway

JUST S OF DANVILLE, Vermilion, IL

Built 2003 Load: 56.4 t ADT: 19,500

MULFORD ROAD

Good

Over: S BR KEITH CR

0.3 MI N RT 20, Winnebago, IL

Built 1971 Load: 56.4 t ADT: 21,600

ATWOOD ROAD

Good

Over: MCDONALD CREEK

AT MCMICHAEL ROAD, Winnebago, IL

Built 1976 Load: 56.4 t ADT: 2,050

FAS 2466/US 150

Good

Over: Tributary to Rock Creek

.6MI E CONGERVILLE, Woodford, IL

Built 2022 Load: 56.4 t ADT: 1,200

ARGO FAY RD

Good

Over: DRAINAGE

.06 MI W BIG CUT RD, Carroll, IL

Built 1994 Load: 56.7 t ADT: 1,600

I-70 (EB)

Good

Over: MILL CREEK

W MARSHALL, Clark, IL

Built 1968 Load: 56.7 t ADT: 11,700

IL 161

Good

Over: Crooked Crk Overflow

1 MI W CENTRALIA, Clinton, IL

Built 2018 Load: 56.7 t ADT: 6,100

17TH AVE

Good

Over: SALT CREEK

1.4 M S I-90, Cook, IL

Built 1999 Load: 56.7 t ADT: 9,200

I 24 WB

Good

Over: LITTLE CACHE CREEK

0.6 MI N ILL 146, Johnson, IL

Built 1971 Load: 56.7 t ADT: 10,650

FAI 39 RMP#15.90

Good

Over: CONVEYOR BELT/PVT RD

600 FT S OF US 6, LaSalle, IL

Built 1985 Load: 56.7 t ADT: 950

ILL 116

Good

Over: 5 MILE CREEK

2.23 MI E OF ILL 47, Livingston, IL

Built 2004 Load: 56.7 t ADT: 1,100

MASON HILL RD

Good

Over: STREAM

0.6 MI W CRYST LK RD, McHenry, IL

Built 1967 Load: 56.7 t ADT: 2,600

IL 16

Good

Over: E FK SHOAL CREEK

2.1M W SPRUCE-NOKOMI, Montgomery, IL

Built 2001 Load: 56.7 t ADT: 1,750

IL 100

Good

Over: WILSON CREEK

E EDGE BLUFF CITY, Schuyler, IL

Built 1999 Load: 56.7 t ADT: 525

TR153 BENSON RD

Good

Over: TRIB TO SPRING CREEK

400 FT W KENNEDY RD, Whiteside, IL

Built 2022 Load: 56.7 t ADT: 50

ILL 94

Good

Over: S FORK BEAR CREEK

1.6 S GOLDEN, Adams, IL

Built 1990 Load: 57.0 t ADT: 800

IL 83 (OAKTON ST)

Good

Over: HIGGINS CREEK

0.4 M W ELMHURST RD, Cook, IL

Built 1972 Load: 57.0 t ADT: 20,900

US 30 FAP 573

Good

Over: Somonauk Creek

1.34 mi e of IL 23, DeKalb, IL

Built 2016 Load: 57.0 t ADT: 3,100

FAP-328 (US-45)

Good

Over: RAMSEY CREEK

5.25 MI S ILL-37 JCT, Effingham, IL

Built 1977 Load: 57.0 t ADT: 3,150

ILL 9

Good

Over: WALL TOWN DR. DITCH

0.67 MI E OF ILL 115, Ford, IL

Built 2005 Load: 57.0 t ADT: 2,500

ILL 14

Good

Over: DRUMMOND BRANCH

2.4 MI E BENTON, Franklin, IL

Built 2008 Load: 57.0 t ADT: 1,850

IL 47

Good

Over: BLACKBERRY CREEK TRB

0.4 M S OF I-88, Kane, IL

Built 1971 Load: 57.0 t ADT: 9,300

FAP 325(IL 16)

Good

Over: Piasa Creek

1.9 mi E FAP10/IL111, Macoupin, IL

Built 2023 Load: 57.0 t ADT: 2,200

NOKOMIS RD

Good

Over: SHOAL CREEK

W. EDGE NOKOMIS, Montgomery, IL

Built 2004 Load: 57.0 t ADT: 850

DRAINAGE DICTH

Good

Over: CH 48 (303RD ST)

3.5 MI N HILLSDALE, Rock Island, IL

Built 1988 Load: 57.0 t ADT: 475

IL 104

Good

Over: PANTHER CREEK

.8 W AUBURN, Sangamon, IL

Built 2008 Load: 57.0 t ADT: 3,500

FAP 840 (IL 49)

Good

Over: Drainage Ditch

0.5 Mi. N. of US 136 (E), Vermilion, IL

Built 2022 Load: 57.0 t ADT: 1,700

TR 173

Good

Over: Drainage Ditch

1.5 Mi. S Keensburg, Wabash, IL

Built 2020 Load: 57.0 t ADT: 50

LOGISTICS PKWY

Good

Over: CREEK

.04MI N BLACKHAWK RD, Winnebago, IL

Built 2006 Load: 57.0 t ADT: 375

IL 140 & IL 127

Good

Over: Little Shoal Creek

0.5mi W Greenville, Bond, IL

Built 2009 Load: 57.3 t ADT: 4,350

TR 214

Good

Over: Trib Plow Hollow Creek

2 MI SW Tiskilwa, Bureau, IL

Built 2023 Load: 57.3 t ADT: 150

I- 57 SB RMP T 294

Good

Over: DIXIE CREEK

RAMP C OVER CREEK, Cook, IL

Built 2021 Load: 57.3 t

CHICAGO RD

Good

Over: INDIAN CREEK

4.5 MI S OF SHABBONA, DeKalb, IL

Built 1969 Load: 57.3 t ADT: 900

IL 64

Good

Over: RR - EJ&E AND UP

1.35 M W OF IL 59, DuPage, IL

Built 2012 Load: 57.3 t ADT: 31,700

HILL AVENUE

Good

Over: E. BR. DUPAGE RIV

N. IL 38 & W. IL 53, DuPage, IL

Built 2016 Load: 57.3 t ADT: 2,650

Showing 25,101-25,150 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.