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

FAP 332(IL 1)

Good

Over: STREAM

.75 MI N GEORGETOWN, Vermilion, IL

Built 1991 Load: 33.4 t ADT: 7,550

FAP 840(IL 49)

Good

Over: STREAM

5.5 MI S OF RANKIN, Vermilion, IL

Built 1992 Load: 33.4 t ADT: 1,350

FAI 64 EB

Good

Over: KASKASKIA R OVERFLOW

0.2 MI E OF CO LINE, Washington, IL

Built 1969 Load: 33.4 t ADT: 15,500

FAI 64 WB

Good

Over: KASKASKIA R OVERFLOW

0.2 MI E OF CO LINE, Washington, IL

Built 1969 Load: 33.4 t ADT: 15,500

ILL 127

Good

Over: TRIB TO L CROOKED CR

0.30 M N ILL 177, Washington, IL

Built 1936 Load: 33.4 t ADT: 2,650

FAS-1818

Good

Over: LITTLE WABASH RIVER

2 MI S CARMI, White, IL

Built 1978 Load: 33.4 t ADT: 450

RENWICK RD

Good

Over: MINK CREEK

1.1 MI WEST WEBER RD, Will, IL

Built 1972 Load: 33.4 t ADT: 14,900

WEST GATE ROAD

Good

Over: GRASSY CREEK

4.5 MILES SOUTH OF HQ, Williamson, IL

Built 2006 Load: 33.6 t ADT: 2

TR 150A

Good

Over: TRIB TO JACKSON CK

1 MILE NORTH TAMMS, Alexander, IL

Built 1981 Load: 33.7 t ADT: 100

US 6 FAS 1247

Good

Over: SOUTH DITCH

1 MI. E. OF MINERAL, Bureau, IL

Built 1993 Load: 33.7 t ADT: 950

FAP 75(IL 29)

Good

Over: Flatt Branch

0.60 mi S IL 48, Christian, IL

Built 2023 Load: 33.7 t ADT: 6,400

FAI 64 WB

Good

Over: KASKASKIA OVERFLOW

1/4 mi W County Line, Clinton, IL

Built 1970 Load: 33.7 t ADT: 15,500

IL 68 (DUNDEE RD)

Good

Over: SPRING CREEK

1.8 M W IL 59, Cook, IL

Built 2009 Load: 33.7 t ADT: 7,450

FAP 749(IL 133)

Good

Over: SCATTERING FORK

2.5 MI E OF ARCOLA, Douglas, IL

Built 1990 Load: 33.7 t ADT: 2,300

IL 16 (FAP 91)

Good

Over: HICKORY GROVE CREEK

2.0 MI E OF KANSAS, Edgar, IL

Built 1963 Load: 33.7 t ADT: 2,500

TR 345 (STALEY RD)

Good

Over: SUGAR CREEK

0.8 M SE OF ELBRIDGE, Edgar, IL

Built 2020 Load: 33.7 t

TR 184

Good

Over: DRAINAGE DITCH

2.5 M NW CHRISMAN, Edgar, IL

Built 2011 Load: 33.7 t ADT: 50

FAS 873

Good

Over: LITTLE BESSIE CK

AKIN RD, Franklin, IL

Built 1980 Load: 33.7 t ADT: 1,000

FAS 868 THOMP RD N

Good

Over: AKIN CREEK

THOMPSONVILLE RD, Franklin, IL

Built 1987 Load: 33.7 t ADT: 1,100

TR 331A

Good

Over: DITCH

3.7 MI E OF ILL 1, Iroquois, IL

Built 2021 Load: 33.7 t ADT: 75

TR 93

Good

Over: LITTLE KINKAID CREEK

2 MI SW OF AVA, Jackson, IL

Built 1993 Load: 33.7 t ADT: 125

WATSON ROAD

Good

Over: UNNAMED CREEK

0.5 MI NE IL 13, Jackson, IL

Built 2008 Load: 33.7 t ADT: 150

FAP-95 (ILL-33)

Good

Over: BIG MUDDY CREEK

WHEELER, Jasper, IL

Built 1989 Load: 33.7 t ADT: 5,700

FAU 8736(IL 37)

Good

Over: STREAM

N PART MT VERNON, Jefferson, IL

Built 2005 Load: 33.7 t ADT: 5,850

US 30

Good

Over: SUGAR GROVE NORTH BR

1.1M E of Dugan Rd, Kane, IL

Built 2015 Load: 33.7 t ADT: 11,900

US 45 & IL 21

Good

Over: APTAKISIC CREEK

1.0 M N OF LAKE-COOK, Lake, IL

Built 2008 Load: 33.7 t ADT: 33,400

IL 47 FAP 326

Good

Over: VERMILION RIVER

3.63 MI S OF IL 116, Livingston, IL

Built 2008 Load: 33.7 t ADT: 2,100

TR 111

Good

Over: TRIB SHORT POINT CR

445E, 2000N, Livingston, IL

Built 1999 Load: 33.7 t ADT: 100

FAS 345 CH6

Good

Over: WEST FORK MAZON RIV

1 MI N ODELL, Livingston, IL

Built 1979 Load: 33.7 t ADT: 225

ILL 160

Good

Over: SUGAR CR

IN HIGHLAND, Madison, IL

Built 1985 Load: 33.7 t ADT: 1,800

MAPLE RD/ TR 177

Good

Over: TR1B TO SILVER CK

1.5MI S HAMEL, Madison, IL

Built 1973 Load: 33.7 t ADT: 150

US 51 (FAP 322)

Good

Over: LOUSE CREEK

5.8 MI S FAYETTE C L, Marion, IL

Built 1959 Load: 33.7 t ADT: 2,250

NORTH AVENUE

Good

Over: WEAVER CREEK

2.3 MI N US45, Massac, IL

Built 1971 Load: 33.7 t ADT: 2,150

FAP 71

Good

Over: DITCH

SW OF BELLFLOWER, McLean, IL

Built 2010 Load: 33.7 t ADT: 900

FAP 71

Good

Over: DITCH

SW OF BELLFLOWER, McLean, IL

Built 2014 Load: 33.7 t ADT: 850

EASTVIEW DR

Good

Over: W BRANCH SUGAR CREEK

1.8 MI SSW 51 & 55, McLean, IL

Built 1960 Load: 33.7 t ADT: 100

TR 82

Good

Over: LATIMORE CREEK

5.0 MI NE OAKFORD, Menard, IL

Built 1985 Load: 33.7 t ADT: 50

TR 66

Good

Over: CREEK

1.5 E ARENZVILLE, Morgan, IL

Built 2006 Load: 33.7 t ADT: 50

FAP 758(IL 32)

Good

Over: STREAM

1.5 MI N OF LAKE CTY, Moultrie, IL

Built 1995 Load: 33.7 t ADT: 2,000

TR 112

Good

Over: ASA CREEK

1.4 MI N SULLIVAN, Moultrie, IL

Built 1964 Load: 33.7 t ADT: 375

TR 18

Good

Over: TRIB TO BOAR CREEK

1 MILE N VILLA RIDGE, Pulaski, IL

Built 1981 Load: 33.7 t ADT: 150

I 74 WB

Good

Over: MISSISSIPPI RIVER

IN BETTENDORF, Rock Island, IL

Built 2020 Load: 33.7 t ADT: 39,050

FAS 634 CH 01

Good

Over: LITTLE WOLF CREEK

3.5 S WILLIAMSVILLE, Sangamon, IL

Built 1984 Load: 33.7 t ADT: 1,650

ILL 100

Good

Over: STREAM

0.2MI S I72/100 INT, Scott, IL

Built 1981 Load: 33.7 t ADT: 1,100

US 50

Good

Over: SILVER CREEK

1.5 M W ILL 4, St. Clair, IL

Built 1939 Load: 33.7 t ADT: 16,000

IL 75

Good

Over: ROCK RUN CREEK

0.5 MI. W. OF DAVIS, Stephenson, IL

Built 1996 Load: 33.7 t ADT: 3,300

FAS 407 - CH 15

Good

Over: SLUG RUN

NW-16-T10NR1W, Warren, IL

Built 1965 Load: 33.7 t ADT: 250

DIXON AVENUE

Good

Over: I&M FEEDER CANAL

E EDGE ROCK FALLS, Whiteside, IL

Built 1965 Load: 33.7 t ADT: 5,500

COUNTY LINE ROAD

Good

Over: COUNTY DITCH

6.5 MI SSE ROCK FALL, Whiteside, IL

Built 1971 Load: 33.7 t ADT: 100

IL 37

Good

Over: TRIB TO LIMB BRANCH

1 MI S OF MARION, Williamson, IL

Built 2018 Load: 33.7 t ADT: 5,500

Showing 22,051-22,100 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.