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

TR 52

Fair

Over: TRIB MACOUPIN CREEK

SOUTHWEST FARMERSVIL, Montgomery, IL

Built 1984 Load: 32.4 t ADT: 100

TR 131

Fair

Over: BLUE GRASS CREEK

4 MI SE RAYMOND, Montgomery, IL

Built 1984 Load: 32.4 t ADT: 50

CH 23

Fair

Over: TRIB MACOUPIN CREEK

4 MI SW WAGGONER, Montgomery, IL

Built 1984 Load: 32.4 t ADT: 75

TR 297

Fair

Over: DRY FORK

2 MI NW FILLMORE, Montgomery, IL

Built 1985 Load: 32.4 t ADT: 75

FAS 728

Fair

Over: SHOAL CREEK

1.5 MI NW PANAMA, Montgomery, IL

Built 1985 Load: 32.4 t ADT: 175

TR 404

Fair

Over: CEASAR CREEK

5.5 MI SE WITT, Montgomery, IL

Built 1987 Load: 32.4 t ADT: 50

TR 428

Fair

Over: BAILY BRANCH

5.3 MI SE NOKOMIS, Montgomery, IL

Built 1988 Load: 32.4 t ADT: 75

TR 60

Fair

Over: GROVE BRANCH

2.0MI SW WALSHVILLE, Montgomery, IL

Built 1993 Load: 32.4 t ADT: 25

NOKOMIS OCONEE RD

Fair

Over: CREEK

8 MI E NOKOMIS, Montgomery, IL

Built 1991 Load: 32.4 t ADT: 500

TR 307

Fair

Over: E FORK SHOAL CREEK

4.2MI W FILLMORE, Montgomery, IL

Built 2006 Load: 32.4 t ADT: 25

TR 429

Fair

Over: GROVE BRANCH

2.8 MI S WALSHVILLE, Montgomery, IL

Built 1994 Load: 32.4 t ADT: 75

TR 3

Fair

Over: HORSE CREEK

4 MI NE FARMERSVILLE, Montgomery, IL

Built 1994 Load: 32.4 t ADT: 100

BARNETT ROAD

Fair

Over: SHOP CREEK

1.0 MI E BARNETT, Montgomery, IL

Built 2002 Load: 32.4 t ADT: 125

RAYMOND PAWNEE RD

Fair

Over: HORSE CR

4.5 MI NE FARMERSVLL, Montgomery, IL

Built 2004 Load: 32.4 t ADT: 250

COFFEEN N RD

Fair

Over: E FRK SHOAL CR

1.5 NE COFFEEN, Montgomery, IL

Built 2007 Load: 32.4 t ADT: 275

WITT TRAIL

Fair

Over: TRB E FK SHOAL CR

5 M S WITT, Montgomery, IL

Built 2008 Load: 32.4 t ADT: 100

FAS 611

Fair

Over: LITTLE INDIAN CREEK

2 MI W PRENTICE, Morgan, IL

Built 1970 Load: 32.4 t ADT: 375

TR 350

Fair

Over: APPLE CREEK

2M S CENTERVILLE, Morgan, IL

Built 1980 Load: 32.4 t ADT: 50

TR 220

Fair

Over: INDIAN CREEK

2 MI SE LITERBERRY, Morgan, IL

Built 1980 Load: 32.4 t ADT: 125

TR 234

Fair

Over: MAUVAISE TERRE CRK

2.7 M E J'VILLE, Morgan, IL

Built 1983 Load: 32.4 t ADT: 100

TR 57

Fair

Over: COON RUN CREEK

2MI S MERADOSIA, Morgan, IL

Built 1968 Load: 32.4 t ADT: 325

TR 142

Fair

Over: BRUSHY FORK

1.7 M NNW WOODSON, Morgan, IL

Built 1983 Load: 32.4 t ADT: 50

TR 7

Fair

Over: CONOVER BRANCH

4.75 MI W PRENTICE, Morgan, IL

Built 1980 Load: 32.4 t ADT: 25

TR 78

Fair

Over: MAUVAISE TERRE CREEK

3.5M NW JACKSONVILL, Morgan, IL

Built 1981 Load: 32.4 t ADT: 325

TR 157

Fair

Over: WILLOW BRANCH

2.75 MI W JACKSONVIL, Morgan, IL

Built 1980 Load: 32.4 t ADT: 175

TR 230

Fair

Over: MOONEY BR APPLE CR

1 MI N NORTONVILLE, Morgan, IL

Built 1981 Load: 32.4 t ADT: 75

TR 262

Fair

Over: INDIAN CREEK

4 E OF YATESVILLE, Morgan, IL

Built 1982 Load: 32.4 t ADT: 25

TR 373

Fair

Over: TRIBUTARY COAL CREEK

3.5 M SSW MURRYVILLE, Morgan, IL

Built 1984 Load: 32.4 t ADT: 25

SLEEPY HOLLOW ROAD

Fair

Over: LITTLE APPLE CREEK

5 MI E MURRAYVILLE, Morgan, IL

Built 1983 Load: 32.4 t ADT: 75

TR 166 HILL RD

Fair

Over: MAUVAISE TERRE CREEK

1 MI NE JACKSONVILLE, Morgan, IL

Built 1982 Load: 32.4 t ADT: 100

TR 30

Fair

Over: COON RUN

5.7 M E MEREDOSIA, Morgan, IL

Built 1983 Load: 32.4 t ADT: 25

TR 373

Fair

Over: COAL CREEK

3.4 M S MURRYVILLE, Morgan, IL

Built 1984 Load: 32.4 t ADT: 25

TR 332

Fair

Over: APPLE CRK

5.5 MI S E NORTONVIL, Morgan, IL

Built 1986 Load: 32.4 t ADT: 50

TR 96

Fair

Over: WILLOW CRK

1.75 MI W JACKSONVIL, Morgan, IL

Built 1986 Load: 32.4 t ADT: 50

TR 66

Fair

Over: INDIAN CREEK

2MI SE ARENZVILLE, Morgan, IL

Built 1988 Load: 32.4 t ADT: 50

TR 155

Fair

Over: WILLOW BRANCH

4 MI W JACKSONVILLE, Morgan, IL

Built 1992 Load: 32.4 t ADT: 125

FAS 1612

Fair

Over: CREEK

1.5 N J'VILLE, Morgan, IL

Built 1990 Load: 32.4 t ADT: 700

TR 170

Fair

Over: INDIAN CREEK

1.5MI SE LITERBERRY, Morgan, IL

Built 1996 Load: 32.4 t ADT: 25

FAS 612

Fair

Over: INDIAN CRK.

3.5 MI SE LITERBERRY, Morgan, IL

Built 2001 Load: 32.4 t ADT: 150

TR 168

Fair

Over: LICK CREEK

3MI SE MURRAYVILLE, Morgan, IL

Built 1996 Load: 32.4 t ADT: 25

TR 364

Fair

Over: WOODS CREEK

3 MI W WAVERLY, Morgan, IL

Built 1999 Load: 32.4 t ADT: 100

TR 215A

Fair

Over: MAUVAISE TERRE CREEK

1.5 MI NE PISGAH, Morgan, IL

Built 1999 Load: 32.4 t ADT: 25

TR 174

Fair

Over: INDIAN CREEK

1.0 MI S ARCADIA, Morgan, IL

Built 2001 Load: 32.4 t ADT: 100

FAS 1614

Fair

Over: N FK MAUV TRIB

2 M NE JCKSNVILL, Morgan, IL

Built 2009 Load: 32.4 t ADT: 950

TR 8

Fair

Over: WILLOW CREEK

.27 mi N TR 33, Morgan, IL

Built 2012 Load: 32.4 t ADT: 100

TR 30

Fair

Over: WILLOW CREEK

5 MI SW ARENZVILLE, Morgan, IL

Built 1983 Load: 32.4 t ADT: 50

HARDIN AVE

Fair

Over: TOWN BROOK

ON HARDIN AT BROOK, Morgan, IL

Built 1976 Load: 32.4 t ADT: 3,100

SOUTH DIAMOND/BROO

Fair

Over: TOWN BROOK

DIAMOND AT BROOK, Morgan, IL

Built 1988 Load: 32.4 t ADT: 5,200

WEST STREET

Fair

Over: TOWN BROOK

JACKSONVILLE, Morgan, IL

Built 1989 Load: 32.4 t ADT: 1,100

WOODS LANE

Fair

Over: MAUVAISTERRE CREEK

1 E OF JACKSONVILLE, Morgan, IL

Built 1991 Load: 32.4 t ADT: 500

Showing 9,051-9,100 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.