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

IL 89

Good

Over: Brush Creek

6.3 M N of I-80, Bureau, IL

Built 2018 Load: 38.6 t ADT: 1,500

TR 281

Good

Over: EAST BUREAU CREEK

3 1/2 MI W OF DE PUE, Bureau, IL

Built 2020 Load: 38.6 t ADT: 150

US 52 & IL 64

Good

Over: STRADDLE CREEK

2.4 MI. W. LANARK, Carroll, IL

Built 1996 Load: 38.6 t ADT: 3,500

STATE STREET

Good

Over: TRIB TO CARROLL CRK

0.1 MI. W OF IL 78, Carroll, IL

Built 2002 Load: 38.6 t ADT: 400

CH 15(FAS 512)

Good

Over: BRANCH OF SALT FORK

1.5 MI W SIDNEY, Champaign, IL

Built 1982 Load: 38.6 t ADT: 3,100

FAP 328 (US 45)

Good

Over: BRANCH ELM RIVER

.6 MI N JCT US 50, Clay, IL

Built 2009 Load: 38.6 t ADT: 4,550

IL 1 (HALSTED ST

Good

Over: ABANDONED RR

1.3 M S of I-80,294, Cook, IL

Built 2013 Load: 38.6 t ADT: 34,900

US 45/IL21

Good

Over: DITCH

300' S OF LAKE COOK, Cook, IL

Built 1993 Load: 38.6 t ADT: 30,200

IL 62,68 DUNDEE R

Good

Over: RR - EJ&E

0.1 M W IL 59, Cook, IL

Built 1997 Load: 38.6 t ADT: 33,400

FAS-695 (CH-2)

Good

Over: WILLOW CREEK

2 MI E BELAIR, Crawford, IL

Built 1992 Load: 38.6 t ADT: 350

TR 245

Good

Over: FREEPORT CREEK

0.6 MI E PIERCEBURG, Crawford, IL

Built 2021 Load: 38.6 t ADT: 75

FAS 676(CH 17)

Good

Over: LOST CREEK

1.3 MI S UNION CENTE, Cumberland, IL

Built 1983 Load: 38.6 t ADT: 350

TR 120

Good

Over: BEAR CREEK

2 MI NW OF TOLEDO, Cumberland, IL

Built 2018 Load: 38.6 t ADT: 75

75TH STREET

Good

Over: E BRANCH DU PAGE RV

0.3 MI W IL 53, DuPage, IL

Built 1960 Load: 38.6 t ADT: 25,800

TR-309

Good

Over: LIMESTONE CREEK

1 MI S WINTERROWD, Effingham, IL

Built 1989 Load: 38.6 t ADT: 150

TR-174B

Good

Over: WALKER CREEK

0.5 MI N WATSON, Effingham, IL

Built 1991 Load: 38.6 t ADT: 100

TR 256

Good

Over: CREEK

1 MI NW TEUTOPOLIS, Effingham, IL

Built 2008 Load: 38.6 t ADT: 225

FAS-651 (CH-14)

Good

Over: SECTION CREEK

0.5 MI E HERRICK, Fayette, IL

Built 1986 Load: 38.6 t ADT: 950

IL 47 (FAP 326)

Good

Over: MACKINAW RIVER

0.26 MI S. OF IL 165, Ford, IL

Built 2001 Load: 38.6 t ADT: 3,050

ILL 54

Good

Over: W BR VERMILION RIVER

6.56 MI N OF ILL 9, Ford, IL

Built 1988 Load: 38.6 t ADT: 1,650

TR 193

Good

Over: TRB AKIN CREEK

NORTH OF AKIN, Franklin, IL

Built 1900 Load: 38.6 t ADT: 25

TR 128A-FARMER ROA

Good

Over: TRIB TO CANE CREEK

4 MI SE OMAHA, Gallatin, IL

Built 1998 Load: 38.6 t ADT: 25

TR 1E (LIV.CO.TR)

Good

Over: MURRAY SLOUGH

4.7 MI W OF I-55, Grundy, IL

Built 2001 Load: 38.6 t ADT: 25

TR 152 GORMAN RD

Good

Over: TRIB E FORK MAZON RV

SEC18 T31N R8E 3RD, Grundy, IL

Built 1998 Load: 38.6 t ADT: 50

FAS-873 (CH-17)

Good

Over: CONTRARY CREEK

2.5 MI W DALE, Hamilton, IL

Built 1987 Load: 38.6 t ADT: 500

CH 12

Good

Over: BLUFF CANAL

9.0 MI S WARSAW, Hancock, IL

Built 1999 Load: 38.6 t ADT: 350

TR 266

Good

Over: SOUTH EDWARDS RIVER

2 MI E BISHOP HILL, Henry, IL

Built 1977 Load: 38.6 t ADT: 50

ILL 49

Good

Over: BR SHAVETAIL CRK

5.51 MI S JCT 49&24, Iroquois, IL

Built 1996 Load: 38.6 t ADT: 1,000

TR 9A

Good

Over: LITTLE BEAVER CREEK

1.5N 0.5W PAPINEAU, Iroquois, IL

Built 1985 Load: 38.6 t ADT: 100

TR 335

Good

Over: CREEK

SW 1/4 SEC 1-10-1, Jackson, IL

Built 1985 Load: 38.6 t ADT: 900

PLEASANT HILL RD

Good

Over: MUD CRK TRIB

1.25 MI E OF IL 127, Jackson, IL

Built 2005 Load: 38.6 t ADT: 200

JACKSON STREET

Good

Over: UNNAMED CREEK

JACKSON ST IN DOWELL, Jackson, IL

Built 1989 Load: 38.6 t ADT: 125

IL 142

Good

Over: STREAM

0.2MI SE MT VERNON, Jefferson, IL

Built 2015 Load: 38.6 t ADT: 6,850

IL 17 FAP 649

Good

Over: SANDY CREEK

2MI E OF WENNONA, LaSalle, IL

Built 1995 Load: 38.6 t ADT: 900

US 52

Good

Over: TOMAHAWK CREEK

6.98 MI E OF ILL 251, LaSalle, IL

Built 1997 Load: 38.6 t ADT: 1,400

TR-23

Good

Over: SUGAR CREEK

3 MI W RUSSELVILLE, Lawrence, IL

Built 1994 Load: 38.6 t ADT: 50

FAU 7455 (KRUSE RD

Good

Over: BIG CREEK

1.5 Mi. NE MT. ZION, Macon, IL

Built 2018 Load: 38.6 t ADT: 1,250

ILL 111

Good

Over: DRAIN TO HRSESHOE LK

.75 MI S IL 162, Madison, IL

Built 1940 Load: 38.6 t ADT: 6,800

OLD US 51 (SBI 2)

Good

Over: LOUSE CREEK

.5 MI S PATOKA, Marion, IL

Built 1994 Load: 38.6 t ADT: 475

SBI 142 (ILL-37)

Good

Over: CROOKED CREEK

1.5MI S SALEM, Marion, IL

Built 1998 Load: 38.6 t ADT: 4,800

I 24 EB

Good

Over: FUTURE PARK ROAD

1 MI S OF US 45, Massac, IL

Built 1970 Load: 38.6 t ADT: 15,600

I 24 WB

Good

Over: FUTURE PARK ROAD

1 MI S OF US 45, Massac, IL

Built 1970 Load: 38.6 t ADT: 15,600

TR 37

Good

Over: BEAR CREEK

1 MI W OF ILL 145, Massac, IL

Built 1986 Load: 38.6 t ADT: 25

TR 82

Good

Over: TRIB-GURLEY DITCH

0.33 MI N TR 45, Massac, IL

Built 2002 Load: 38.6 t ADT: 25

TR 55

Good

Over: DROWNING FORK

S.CTR-29-T7NR1W, McDonough, IL

Built 2020 Load: 38.6 t ADT: 150

IL 54/FAP 71

Good

Over: STREAM

6.1M N US 136, McLean, IL

Built 1992 Load: 38.6 t ADT: 1,000

TR 69

Good

Over: CAMP CREEK

NE-29-T15NR1W, Mercer, IL

Built 1980 Load: 38.6 t ADT: 100

TR 59

Good

Over: DRAINAGE DITCH

SW-24-T15NR6W, Mercer, IL

Built 1995 Load: 38.6 t ADT: 75

ILL 72

Good

Over: DRAINAGE DITCH

1.0 MI W OF IL 26, Ogle, IL

Built 1990 Load: 38.6 t ADT: 2,250

IL 8

Good

Over: BN RR (072537K)

AT EDWARDS, Peoria, IL

Built 2023 Load: 38.6 t ADT: 2,550

Showing 23,051-23,100 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.