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

FAS 493 CH 5 SAYBR

Good

Over: BR SANGAMON CREEK

1.4 MI S OF ILL 9, McLean, IL

Built 1984 Load: 53.8 t ADT: 900

ANTERIER RD.

Good

Over: SEVENMILE BRANCH

3.5 N.W. GRAND DETOU, Ogle, IL

Built 2005 Load: 53.8 t ADT: 100

FAI 74 & 280 EB

Good

Over: COAL CREEK

2.5 MI W HENRY CO, Rock Island, IL

Built 2014 Load: 53.8 t ADT: 7,500

FAI 74 & 280 WB

Good

Over: COAL CREEK

2.5 MI W HENRY CO, Rock Island, IL

Built 2014 Load: 53.8 t ADT: 7,500

SBI 1E (BROWNS RD)

Good

Over: BONPAS CREEK

BROWNS, Wabash, IL

Built 2007 Load: 53.8 t ADT: 225

US 20 W B

Good

Over: W CHANNEL ROCK RIV

.5 MI E OF ILL 2, Winnebago, IL

Built 2015 Load: 53.8 t ADT: 32,000

BORG WARNER ENTRAN

Good

Over: DRAINAGE WAY

.21 MI W 20TH ST, Winnebago, IL

Built 2016 Load: 53.8 t ADT: 2,050

TR 302

Good

Over: Tributary to McKee Creek

1.0 mi S of Coatsburg, Adams, IL

Built 2022 Load: 54.1 t ADT: 25

TR 212B

Good

Over: Elm Creek

1 Mi. N Flora, Clay, IL

Built 2019 Load: 54.1 t ADT: 50

IL 1 CHI,VIN RDS

Good

Over: THORN CREEK

0.5 M N OF US 30, Cook, IL

Built 1987 Load: 54.1 t ADT: 9,450

WOODLAWN AVENUE WE

Good

Over: LITTLE CALUMET RIVER

0.44 MI N US 6, Cook, IL

Built 2019 Load: 54.1 t ADT: 400

IL 83

Good

Over: MARION HILLS DITCH

0.05 M N of 63rd, DuPage, IL

Built 2015 Load: 54.1 t ADT: 53,900

ILL 97

Good

Over: LITTLE HAW CR

4 MI NW OF MAQUON, Knox, IL

Built 2016 Load: 54.1 t ADT: 1,800

US 50

Good

Over: VERMILLION CREEK

.25 MI E SELMAVIL RD, Marion, IL

Built 1994 Load: 54.1 t ADT: 10,300

ILL 97 & 123

Good

Over: HEMP FACTORY BRANCH

S EDGE PETERSBURG, Menard, IL

Built 1994 Load: 54.1 t ADT: 4,850

IL 127

Good

Over: BLUE GRASS CREEK

3.4M S IL 48, Montgomery, IL

Built 1990 Load: 54.1 t ADT: 2,950

EXCHANGE ST

Good

Over: PLUM CREEK

1.2 M W STATE LI RD, Will, IL

Built 1963 Load: 54.1 t ADT: 15,600

ILL 117

Good

Over: WALNUT CREEK

1.95 MI S OF ILL 116, Woodford, IL

Built 1997 Load: 54.1 t ADT: 2,900

CH 48

Good

Over: MCKEE CREEK

4.6 MI NE LIBERTY, Adams, IL

Built 1959 Load: 54.4 t ADT: 950

US 40/FAS 779

Good

Over: W Fork Shoal Creek

1.7 MI E Pocahontas, Bond, IL

Built 2017 Load: 54.4 t ADT: 1,300

BELMONT AVE

Good

Over: DES PLAINES RIVER

2.2 M W IL 43, Cook, IL

Built 2001 Load: 54.4 t ADT: 23,200

TR 68

Good

Over: DRAINAGE DITCH

2 MI SE CHESTERVILLE, Douglas, IL

Built 2021 Load: 54.4 t ADT: 175

FAI 74 & 280 WB

Good

Over: MOSQUITO CREEK

3.8 MI W JCT FAI 80, Henry, IL

Built 1961 Load: 54.4 t ADT: 7,500

IL 47

Good

Over: BLACKBERRY CREEK

1.0 M S OF I-88, Kane, IL

Built 1968 Load: 54.4 t ADT: 9,300

C.H. 2 (Grove Road

Good

Over: West Aux Sable Creek

1.5 MI N of US RTE 5, Kendall, IL

Built 2020 Load: 54.4 t ADT: 2,300

TR 304

Good

Over: FRENCH CREEK

SW-34-T10NR4E, Knox, IL

Built 2019 Load: 54.4 t ADT: 25

ILL 251

Good

Over: BAILEY CREEK

4.4 MI S OF ILL 71, LaSalle, IL

Built 1999 Load: 54.4 t ADT: 1,700

TR 149 (1500)

Good

Over: Trib to Verillion

1500 N, 2205E, Livingston, IL

Built 2019 Load: 54.4 t ADT: 100

FAP 717 (IL 10)

Good

Over: Sugar Creek Overflow

0.05 mi E TR 44, Logan, IL

Built 2015 Load: 54.4 t ADT: 2,000

JOHNSBURG ROAD

Good

Over: DUTCH CREEK

.6 M E IL RT31, McHenry, IL

Built 1994 Load: 54.4 t ADT: 13,500

FLAGG RD

Good

Over: BRANCH KYTE CREEK

5.5 MI NW ASHTON, Ogle, IL

Built 1956 Load: 54.4 t ADT: 1,150

ILL 96

Good

Over: KISER CREEK

AT NEW CANTON, Pike, IL

Built 1938 Load: 54.4 t ADT: 775

ILL 34

Good

Over: STREAM

2.6MI.E.OF ILL 145, Saline, IL

Built 2005 Load: 54.4 t ADT: 2,050

IL 157

Good

Over: UPRR

0.7mi E of IL3 in Cahokia, St. Clair, IL

Built 2009 Load: 54.4 t ADT: 10,550

US ROUTE 20 (FRNT

Good

Over: TRIB. PECATONICA RVR

W OF IL 26- N FREPRT, Stephenson, IL

Built 2011 Load: 54.4 t ADT: 200

DELAVAN RD - TR130

Good

Over: Trib. to Mackinaw River

NE-22-T23NR4W, Tazewell, IL

Built 2018 Load: 54.4 t ADT: 75

FAS 331(CH 10)

Good

Over: FOUNTAIN CREEK

8.4 MI N POTOMAC, Vermilion, IL

Built 1983 Load: 54.4 t ADT: 475

FAP-877 (ILL-141)

Good

Over: DRAINAGE DITCH

3 MI W NEW HAVEN, White, IL

Built 2018 Load: 54.4 t ADT: 2,550

I-355 NB

Good

Over: FIDDYMENT CREEK

.5M N OF IL7, Will, IL

Built 2007 Load: 54.4 t ADT: 71,300

MADISON STREET

Good

Over: UNION STA TRACK

CHGO RIV TO CANAL ST, Cook, IL

Built 1922 Load: 54.8 t ADT: 12,100

IL 54 (FAP 71)

Good

Over: CREEK

0.25 MI NW JCT IL 48, De Witt, IL

Built 2002 Load: 54.8 t ADT: 1,600

US 45-FAP 881

Good

Over: LITTLE CACHE CREEK

N OF BLOOMFIELD, Johnson, IL

Built 2001 Load: 54.8 t ADT: 2,150

IL 47

Good

Over: BLACKBERRY CREEK

IL 47 & Main St, Kane, IL

Built 2020 Load: 54.8 t ADT: 9,700

CLAVEY ROAD

Good

Over: SKOKIE DITCH

0.4 M E 41, Lake, IL

Built 2022 Load: 54.8 t ADT: 3,500

TR 66B DUTCH RD

Good

Over: THREE MILE BRANCH

2.5 MI N US 30, Lee, IL

Built 2018 Load: 54.8 t ADT: 100

AURORA STREET

Good

Over: NORTH DITCH

1840N, 1600E, Livingston, IL

Built 1992 Load: 54.8 t ADT: 1,350

IL 157

Good

Over: Trib to Silver Creek

Just S of Hamel CL, Madison, IL

Built 2019 Load: 54.8 t ADT: 2,550

TR 108

Good

Over: Rock CR

3.0 Mi SW Athens, Menard, IL

Built 2021 Load: 54.8 t ADT: 125

FAS 617/CH 18

Good

Over: APPLE CREEK

3.5MI SW WAVERLY, Morgan, IL

Built 1996 Load: 54.8 t ADT: 250

US 54

Good

Over: SPATTER DOCK LAKE

1.2M SW IL 96, Pike, IL

Built 1974 Load: 54.8 t ADT: 2,500

Showing 25,001-25,050 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.