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

W STATE ST

Fair

Over: KENT CR

0.06 MI W KILBURN, Winnebago, IL

Built 1979 Load: 32.4 t ADT: 6,400

KISHWAUKEE ST

Fair

Over: KEITH CREEK

0.12 N OF BROADWAY, Winnebago, IL

Built 2009 Load: 32.4 t ADT: 14,600

ELM AVE

Fair

Over: LOVES PARK CREEK

N. OF CLIFFORD AVE, Winnebago, IL

Built 1996 Load: 32.4 t ADT: 1,350

SWANSON DR

Fair

Over: S BR MCDONALD CRK

.2 MI S OF SWANSON R, Winnebago, IL

Built 2007 Load: 32.4 t ADT: 1,000

I-74

Fair

Over: ROCK CREEK TRIBUTARY

.3 MI E CONGERVILLE, Woodford, IL

Built 1965 Load: 32.4 t ADT: 28,400

IL 116

Fair

Over: W BR PANTHER CREEK

3.74 MI E OF ILL117, Woodford, IL

Built 1997 Load: 32.4 t ADT: 4,000

IL 116

Fair

Over: UNNAMED STREAM

0.84 M. W. OF IL117, Woodford, IL

Built 1958 Load: 32.4 t ADT: 4,100

TR 190

Fair

Over: PANTHER CREEK

1.25 MI S SECOR, Woodford, IL

Built 1978 Load: 32.4 t ADT: 100

TR 95

Fair

Over: PANTHER CREEK

2725 EAST 1600 NORTH, Woodford, IL

Built 1978 Load: 32.4 t ADT: 100

TR 162

Fair

Over: RED RIVER

1900 EAST 730 NORTH, Woodford, IL

Built 1978 Load: 32.4 t ADT: 25

TR 129

Fair

Over: WALNUT CREEK

1125 EAST 1300 NORTH, Woodford, IL

Built 1978 Load: 32.4 t ADT: 50

FAS 363 CH 9

Fair

Over: MACKINAW RIVER

5 MI SW KAPPA, Woodford, IL

Built 1980 Load: 32.4 t ADT: 325

TR 244A

Fair

Over: PANTHER CREEK

2.5 MI N PANOLA, Woodford, IL

Built 1979 Load: 32.4 t ADT: 175

TR 250A

Fair

Over: E BR PANTHER CREEK

2 MI SE PANOLA, Woodford, IL

Built 1981 Load: 32.4 t ADT: 25

TR 162

Fair

Over: TRIB W BR PANTHER CR

2.5 MI SE ROANOKE, Woodford, IL

Built 1980 Load: 32.4 t ADT: 50

TR 186

Fair

Over: W BR PANTHER CREEK

3.2 MI E ROANOKE, Woodford, IL

Built 1981 Load: 32.4 t ADT: 100

TR 251

Fair

Over: DENMAN CREEK

7 MI S SECOR, Woodford, IL

Built 1980 Load: 32.4 t ADT: 50

TR 223B

Fair

Over: RED RIVER

660N 1875 E, Woodford, IL

Built 1980 Load: 32.4 t ADT: 75

TR 92

Fair

Over: RICHLAND CREEK

1 MI S LOW POINT, Woodford, IL

Built 1981 Load: 32.4 t ADT: 75

TR 103

Fair

Over: TRIB PANTHER CREEK

2490E 1500N, Woodford, IL

Built 1982 Load: 32.4 t ADT: 50

TR 192

Fair

Over: DENMAN CREEK

2225E 290N, Woodford, IL

Built 1982 Load: 32.4 t ADT: 75

TR174

Fair

Over: TRIB W BR PANTHER CR

1.9 MI N US RT. 24, Woodford, IL

Built 1984 Load: 32.4 t ADT: 200

TR 228

Fair

Over: E BR PANTHER CR

1.7 MI W US 51, Woodford, IL

Built 1985 Load: 32.4 t ADT: 50

TR 230

Fair

Over: PANTHER CR

1 MI W US 51, Woodford, IL

Built 1987 Load: 32.4 t ADT: 75

TR61B

Fair

Over: SNAKE CR.

1.8 MI. E. C.H. 1, Woodford, IL

Built 1986 Load: 32.4 t ADT: 25

TR145

Fair

Over: TRIB OF WALNUT CR

2.0 MI S. ILL 116, Woodford, IL

Built 1986 Load: 32.4 t ADT: 50

TR 92

Fair

Over: TRIB OF RICHLAND CR

0.3 MI S CH 24, Woodford, IL

Built 1987 Load: 32.4 t ADT: 50

TR168A (Denman Rd)

Fair

Over: VINCENT RUN

340 N 2050 E, Woodford, IL

Built 1989 Load: 32.4 t ADT: 75

CH 3

Fair

Over: WALNUT CR

1.7 MI. NW EUREKA, Woodford, IL

Built 1990 Load: 32.4 t ADT: 200

TR 186

Fair

Over: PANTHER CR

1.5 MI. N. ILL 24, Woodford, IL

Built 1991 Load: 32.4 t ADT: 200

TR 221

Fair

Over: MILL CREEK

1400N,585S, Woodford, IL

Built 1994 Load: 32.4 t ADT: 100

TR 160

Fair

Over: HALLENBACH CR

2. MI. W. ILL 116, Woodford, IL

Built 1991 Load: 32.4 t ADT: 50

TR 36

Fair

Over: COON CREEK

1960N, 580E, Woodford, IL

Built 1994 Load: 32.4 t ADT: 100

TR 1A

Fair

Over: SNAG CREEK

1MILE WEST OF TR23, Woodford, IL

Built 1994 Load: 32.4 t ADT: 50

TR84

Fair

Over: MUD CREEK

0.3MI,N-TR237A, Woodford, IL

Built 1994 Load: 32.4 t ADT: 175

TR 162

Fair

Over: W BR OF PANTHER CRK

.5 M E OF ROANOKE, Woodford, IL

Built 1997 Load: 32.4 t ADT: 100

FAS 366

Fair

Over: RICHLAND CREEK

.55 MI E OF IL 26, Woodford, IL

Built 1995 Load: 32.4 t ADT: 275

TR 85

Fair

Over: PARTRIDGE CRK

2 MI N OF METAMORA, Woodford, IL

Built 1997 Load: 32.4 t ADT: 50

TR 68

Fair

Over: RICHLAND CREEK

4.5 MI SW WASHBURN, Woodford, IL

Built 1998 Load: 32.4 t ADT: 50

TR 78

Fair

Over: RICHLAND CR

1 MI N CAZENOVIA, Woodford, IL

Built 2006 Load: 32.4 t ADT: 25

TR 122

Fair

Over: SNAG CR

2150N 1500E, Woodford, IL

Built 2005 Load: 32.4 t ADT: 25

TR 205

Fair

Over: TRIB PANTHER CR

3.5 S W SECOR, Woodford, IL

Built 2006 Load: 32.4 t ADT: 525

TR 230

Fair

Over: E BR PANTHER CR

SE COR-25-T27NR1E, Woodford, IL

Built 2007 Load: 32.4 t ADT: 275

TR 51 (Low Point R

Fair

Over: Richland Creek

0.2 MI W IL 89, Woodford, IL

Built 2011 Load: 32.4 t ADT: 100

TR 194

Fair

Over: TRIB PANTHER CR

2 MI SE SECOR, Woodford, IL

Built 2011 Load: 32.4 t ADT: 100

TR 58

Fair

Over: WALNUT CREEK

910 EAST 1290 NORTH, Woodford, IL

Built 1978 Load: 32.4 t ADT: 150

FAS 1358 CH 6

Fair

Over: WOLF CREEK

2MI. S. ELPASO, Woodford, IL

Built 1990 Load: 32.4 t ADT: 750

TR108E

Fair

Over: BURKETT HOLLOW CREEK

1.26 MI W & S ILL 26, Woodford, IL

Built 1994 Load: 32.4 t ADT: 75

TR 159A

Fair

Over: WOLF CREEK

1 MI S GRMNTN HILLS, Woodford, IL

Built 1998 Load: 32.4 t ADT: 350

BULLOCK ST

Fair

Over: TRIB OF WALNUT CR

0.05 MI W US 24, Woodford, IL

Built 1986 Load: 32.4 t ADT: 275

Showing 10,151-10,200 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.