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

N. PARK ROAD

Fair

Over: YELLOW CREEK

N. ENT TO KRAPE PARK, Stephenson, IL

Built 1919 Load: 24.3 t ADT: 750

HARDING RD - TR 43

Fair

Over: MUD CREEK

SW-8-T25NR2W, Tazewell, IL

Built 1973 Load: 24.3 t ADT: 825

FAU 6761 - CH 19

Fair

Over: LICK CREEK

SW-32-T25NR4W, Tazewell, IL

Built 1958 Load: 24.3 t ADT: 7,250

FAS 467-CH 5

Fair

Over: STREAM

NE-10-T24NR3W, Tazewell, IL

Built 1953 Load: 24.3 t ADT: 1,550

FAS 2462 - CH 11

Fair

Over: STREAM

SE-COR-30-T22NR4W, Tazewell, IL

Built 1900 Load: 24.3 t ADT: 375

14TH ST

Fair

Over: STREAM

NE-14-T24NR5W, Tazewell, IL

Built 1960 Load: 24.3 t ADT: 4,500

TR 88

Fair

Over: STREAM

S.CTR-36-T24NR5W, Tazewell, IL

Built 1955 Load: 24.3 t ADT: 10

TR 112

Fair

Over: STREAM

NE COR-29-T23NR4W, Tazewell, IL

Built 1951 Load: 24.3 t ADT: 50

TR 61B

Fair

Over: STREAM

CTR-27-T25NR3W, Tazewell, IL

Built 1958 Load: 24.3 t ADT: 1,050

TR 310

Fair

Over: SARGENT SLOUGH

SW-22-T24NR2W, Tazewell, IL

Built 1967 Load: 24.3 t ADT: 75

TR 244

Fair

Over: DRAINAGE DITCH

W.CTR-11-T22NR3W, Tazewell, IL

Built 1929 Load: 24.3 t ADT: 10

POLK ST

Fair

Over: BULL RUN CREEK

SE 16 T25NR3W, Tazewell, IL

Built 1985 Load: 24.3 t ADT: 1,050

TR 8B

Fair

Over: DRAINAGE DITCH

N.CTR-16-T23NR7W, Tazewell, IL

Built 1960 Load: 24.3 t ADT: 50

TR193

Fair

Over: CREEK

.5 M E US 51, Union, IL

Built 1900 Load: 24.3 t ADT: 225

FAS 511(CH 16)

Fair

Over: STREAM

2 MI SE INDIANOLA, Vermilion, IL

Built 1934 Load: 24.3 t ADT: 300

CH 26

Fair

Over: STREAM

1 MI NW OF HUMRICK, Vermilion, IL

Built 1932 Load: 24.3 t ADT: 250

FAS 511(CH 16)

Fair

Over: STREAM

3 MI W OF RIDGEFARM, Vermilion, IL

Built 1934 Load: 24.3 t ADT: 300

FAS 331(CH 10)

Fair

Over: STREAM

1.5 MI N OF COLLISON, Vermilion, IL

Built 1932 Load: 24.3 t ADT: 450

FAS 496(CH 14)

Fair

Over: STREAM

3 MI W OF ROSSVILLE, Vermilion, IL

Built 1954 Load: 24.3 t ADT: 400

TR 3

Fair

Over: STREAM

1.5 MI N CHENEYVLE, Vermilion, IL

Built 1935 Load: 24.3 t ADT: 50

TR 14

Fair

Over: OLIVE BRANCH

5 MI SW FAIRMOUNT, Vermilion, IL

Built 1900 Load: 24.3 t ADT: 50

TR 84 A

Fair

Over: JORDAN CREEK

2.5 MI NE FAIRMOUNT, Vermilion, IL

Built 1900 Load: 24.3 t ADT: 50

TR 148

Fair

Over: GLENBURN CREEK

2.5 MI S NEWTOWN, Vermilion, IL

Built 1900 Load: 24.3 t ADT: 50

TR 171

Fair

Over: STONY CREEK

2 MI E OF HOPE, Vermilion, IL

Built 1963 Load: 24.3 t ADT: 75

TR 355

Fair

Over: JORDAN CREEK

1 MI W FAIRMOUNT, Vermilion, IL

Built 1900 Load: 24.3 t ADT: 75

TR 361

Fair

Over: JORDAN CREEK

1 MI S FAIRMOUNT, Vermilion, IL

Built 1900 Load: 24.3 t ADT: 50

TR 330

Fair

Over: STREAM

2.5 MI NE ROSSVILLE, Vermilion, IL

Built 1989 Load: 24.3 t ADT: 50

TR 1

Fair

Over: STREAM

2 MI NW RANKIN, Vermilion, IL

Built 1920 Load: 24.3 t ADT: 50

TR 44

Fair

Over: STREAM

1 MI SW ELLIS, Vermilion, IL

Built 1976 Load: 24.3 t ADT: 50

TR 136

Fair

Over: FOUNTAIN CREEK

2.5 MI S EAST LYNN, Vermilion, IL

Built 1974 Load: 24.3 t ADT: 50

FAS-809

Fair

Over: DRAINAGE DITCH

S EDGE FRIENDSVILLE, Wabash, IL

Built 1940 Load: 24.3 t ADT: 1,500

TR 181

Fair

Over: PICAYUNE CREEK TRIB

N.CTR-1-T9NR2W, Warren, IL

Built 1977 Load: 24.3 t ADT: 100

TR 104A

Fair

Over: BR OF CEDAR CR

CTR-9-T11NR2W, Warren, IL

Built 1975 Load: 24.3 t ADT: 50

TR 48

Fair

Over: SOUTH FORK CR

W1/2-2-T9NR3W, Warren, IL

Built 1971 Load: 24.3 t ADT: 25

TR 139

Fair

Over: OLD TOM CR

SE-32-T11NR3W, Warren, IL

Built 1900 Load: 24.3 t ADT: 75

TR 20

Fair

Over: DAVIDS CR

NW-29-T12NR3W, Warren, IL

Built 1978 Load: 24.3 t ADT: 50

ILL 15

Fair

Over: ELKHORN CREEK

0.10 MI E ILL 153, Washington, IL

Built 1933 Load: 24.3 t ADT: 2,050

TR 172

Fair

Over: NORTH CREEK

2 MI E-1MI S NEWMIND, Washington, IL

Built 1957 Load: 24.3 t ADT: 150

TR 263

Fair

Over: BR MUD CREEK

2 MI N TILDEN, Washington, IL

Built 1967 Load: 24.3 t ADT: 250

TR 153

Fair

Over: BR LITTLE MUDDY

0.75 MI N-1MI W ASHL, Washington, IL

Built 1963 Load: 24.3 t ADT: 50

TR 196

Fair

Over: BR BEAUCOUP CREEK

4 MI WEST OF DUBOIS, Washington, IL

Built 1963 Load: 24.3 t ADT: 50

TR 206A

Fair

Over: SUGAR CREEK

BEAUCOUP-ASHLEY TWP, Washington, IL

Built 1965 Load: 24.3 t ADT: 75

TR 268

Fair

Over: WEBSTER CREEK

2.7 MI N OF IRVINGTO, Washington, IL

Built 1962 Load: 24.3 t ADT: 325

CH 12

Fair

Over: LITTLE MUDCREEK

1.8 MI S STONE CHURC, Washington, IL

Built 1965 Load: 24.3 t ADT: 225

TR 0074

Fair

Over: TRIBUTARY WEAVER CR

.25 MI S OF RT ILL15, Washington, IL

Built 1966 Load: 24.3 t ADT: 25

TR 196

Fair

Over: HICKORY CREEK

NW 1/4 SEC23 T3S R2W, Washington, IL

Built 1963 Load: 24.3 t ADT: 150

TR 267

Fair

Over: BR OF SWANWICK CR

2 MI SE OF OAKDALE, Washington, IL

Built 1964 Load: 24.3 t ADT: 25

TR-126

Fair

Over: FOUR MILE CREEK

1.5 MI SE KEENES, Wayne, IL

Built 1945 Load: 24.3 t ADT: 50

TR-620

Fair

Over: NEWTON BRANCH

2 MI E MT ERIE, Wayne, IL

Built 1980 Load: 24.3 t ADT: 25

FAP-857 (ILL-14)

Fair

Over: STREAM

2 MI E CROSSVILLE, White, IL

Built 1937 Load: 24.3 t ADT: 250

Showing 5,601-5,650 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.