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

ILL 78

Good

Over: KICKAPOO CREEK

1 MI S ILL 78&8 JCT, Knox, IL

Built 2020 Load: 81.0 t ADT: 1,400

FAI 74 & Ramp G

Good

Over: COPPER SLOUGH

NORTHWEST OF CHAMPAIGN, Champaign, IL

Built 2023 Load: 81.6 t ADT: 31,500

ILL 146

Good

Over: STREAM

1.7M N OF E-TOWN, Hardin, IL

Built 1954 Load: 82.0 t ADT: 1,500

IL 111

Good

Over: SUGAR CREEK

4.81M S JCT IL 108, Macoupin, IL

Built 1992 Load: 82.0 t ADT: 900

I- 94 SB TO I-55 W

Good

Over: HALSTED ST

NORTH SIDE OF I-55, Cook, IL

Built 2000 Load: 82.3 t ADT: 17,450

US 45/52

Good

Over: N. Branch of Rock Cr

1.5M N of Manteno Rd/CH 9, Kankakee, IL

Built 2023 Load: 82.3 t ADT: 5,900

GALUM OFFICE ROAD

Good

Over: STREAM

0.30MI NE PANDA BEAR, Perry, IL

Built 1984 Load: 82.6 t ADT: 10

BRIDGE ST

Good

Over: I & M CANAL

CHANNAHON, Will, IL

Built 2000 Load: 82.9 t ADT: 700

RIDGE ROAD

Good

Over: COUNTY DITCH NO ONE

6 MI. SW. ROCK FALLS, Whiteside, IL

Built 1977 Load: 83.3 t ADT: 150

IL 102

Good

Over: RYAN'S CREEK

6 M S of IL 53, Will, IL

Built 2019 Load: 83.3 t ADT: 2,150

IL 53

Good

Over: BUFFALO CREEK

0.3 M W OF IL 83, Lake, IL

Built 1993 Load: 83.9 t ADT: 21,800

BAKER RD

Good

Over: UNNAMED CREEK

0.3 MI E CROWLEY RD, Winnebago, IL

Built 1977 Load: 84.6 t ADT: 150

TR 32

Good

Over: PHELPS DITCH

3 M NE BEARDSTOWN, Cass, IL

Built 1970 Load: 84.9 t ADT: 50

FAS-1706 (CH-6)

Good

Over: LAKE SARA

3 MI SE SHUMWAY, Effingham, IL

Built 1958 Load: 84.9 t ADT: 1,500

IL 1 (HALSTED ST

Good

Over: CALUMET RIVER

@ 146TH ST, Cook, IL

Built 2001 Load: 85.2 t ADT: 13,700

US 24

Good

Over: DRAIN. DITCH

1.73 MI W ILL 115, Ford, IL

Built 1987 Load: 85.2 t ADT: 2,600

FAS 598

Good

Over: BAY CREEK

2.25 MI E BAYLIS, Pike, IL

Built 1994 Load: 86.8 t ADT: 450

TR 279

Good

Over: CROZIER CR TRIB

1 M SW ELDARA, Pike, IL

Built 2011 Load: 87.2 t ADT: 25

TR 140

Good

Over: STREAM

.1 MI W ROBINSON CR, Shelby, IL

Built 1966 Load: 87.2 t ADT: 75

EDENS FRT ROAD

Good

Over: SKOKIE RIVER

3.5 M N IL-58 P12, Cook, IL

Built 1993 Load: 87.8 t ADT: 1,100

IL 22

Good

Over: MD FK N BR CHGO RVR

0.5 M E OF IL 43, Lake, IL

Built 2005 Load: 88.1 t ADT: 19,300

ILL 104

Good

Over: BRANCH BURTON CREEK

4.4MI E I-172/IL 104, Adams, IL

Built 1987 Load: 88.8 t ADT: 5,100

FAI 70 WB

Good

Over: Trib to Hurricane Cr

1/2Mi SW MULBERRY GR, Bond, IL

Built 1967 Load: 88.8 t ADT: 11,400

FAI 70 EB

Good

Over: Trib to Hurricane Cr

1/2Mi SW MULBERRY GR, Bond, IL

Built 1967 Load: 88.8 t ADT: 11,400

COUNTY LINE RD

Good

Over: BR PISCASAW CREEK

1.5 E CAPRON, Boone, IL

Built 1968 Load: 88.8 t ADT: 225

BLAINE RD

Good

Over: BRANCH BEAVER CREEK

3.0 MI N CAPRON, Boone, IL

Built 1972 Load: 88.8 t ADT: 50

TR 95

Good

Over: TRIB TO JAKES BRANCH

2.5 MI NW OF ASHMORE, Coles, IL

Built 2008 Load: 88.8 t ADT: 50

TR 299 B

Good

Over: INDIAN CREEK

2.0 MI S VERMILION, Edgar, IL

Built 1977 Load: 88.8 t ADT: 125

FAS 1874 REND CTY

Good

Over: BRANCH BIG MUDDY RIV

REND LAKE DAM, Franklin, IL

Built 1971 Load: 88.8 t ADT: 750

HARMONY ROAD

Good

Over: TRIB HAMPSHIRE CREEK

.5MI N OF ALLEN RD, Kane, IL

Built 2008 Load: 88.8 t ADT: 1,450

HARTER ROAD

Good

Over: E.BR BIG ROCK CREEK

2.4 MI NW KANEVILLE, Kane, IL

Built 1980 Load: 88.8 t ADT: 425

FAS 512(CH 8)

Good

Over: OLIVE BRANCH

3.4 MI W FAIRMOUNT, Vermilion, IL

Built 1962 Load: 88.8 t ADT: 1,750

GOODENOW RD

Good

Over: PLUM CREEK

0.06 MI W IL-1, Will, IL

Built 2019 Load: 88.8 t ADT: 4,600

ALLOTT DR

Good

Over: JORDAN CREEK

1.3 MI E IL-53, Will, IL

Built 1980 Load: 88.8 t ADT: 250

PERRYVILLE RD

Good

Over: UNNAMED CREEK

.6 MI. S. IL 173, Winnebago, IL

Built 1998 Load: 88.8 t ADT: 15,300

BAYVIEW DRIVE

Good

Over: CEDAR CREEK

BAYVIEW DRIVE, Adams, IL

Built 1967 Load: 89.1 t ADT: 1,150

33RD ST

Good

Over: .5 BLOCK S RTE 104

CITY OF QUINCY, Adams, IL

Built 1974 Load: 89.1 t ADT: 2,050

IL 49 (FAP 836)

Good

Over: LITTLE VERMILION RIV

4 MI S OF HOMER, Champaign, IL

Built 2008 Load: 89.1 t ADT: 1,350

FAP 725 (EB)

Good

Over: COPPER SLOUGH

W OF CHAMPAIGN, Champaign, IL

Built 1966 Load: 89.1 t ADT: 5,800

I-57

Good

Over: STREAM

2.5 MI NE OF US 45, Coles, IL

Built 1965 Load: 89.1 t ADT: 19,800

GOVERNORS HWY-PULA

Good

Over: BUTTERFIELD CREEK

0.05 M S US 30, Cook, IL

Built 1985 Load: 89.1 t ADT: 20,000

RIDGELAND AVE.

Good

Over: TINLEY CREEK

0.25M.N.OF 143RD.ST., Cook, IL

Built 1931 Load: 89.1 t ADT: 14,500

FAS 1698

Good

Over: DOGWOOD CREEK

3 MI W EATON, Crawford, IL

Built 2004 Load: 89.1 t ADT: 150

FAP 71(IL 54)

Good

Over: N FORK SALT CREEK

3 MI W OF DEWITT, De Witt, IL

Built 1976 Load: 89.1 t ADT: 1,650

IL-390 RAMP

Good

Over: WILLOW CREEK

0.1 MI W YORK RD, DuPage, IL

Built 2017 Load: 89.1 t ADT: 5,500

TR 272

Good

Over: RICHLAND CREEK

3 MI E SHOBONIER, Fayette, IL

Built 2004 Load: 89.1 t ADT: 50

TR 290

Good

Over: LINN CREEK

4 MI NE CORRECT CTR, Fayette, IL

Built 2012 Load: 89.1 t ADT: 100

TR-900 (PUB PRK RD

Good

Over: STREAM

RAMSEY LAKE STATE PK, Fayette, IL

Built 1909 Load: 89.1 t ADT: 100

IL 41

Good

Over: Gallett Creek

.17mi E McDonough Co, Fulton, IL

Built 2020 Load: 89.1 t ADT: 1,450

ILL 1

Good

Over: BEAVER CREEK

0.2 MI N HARDIN CO, Gallatin, IL

Built 2009 Load: 89.1 t ADT: 1,200

Showing 25,401-25,450 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.