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 398

Fair

Over: BAY CREEK

2.5 MI. SW DETROIT, Pike, IL

Built 1985 Load: 32.4 t ADT: 75

TR 371

Fair

Over: BUCK BRANCH

0.56 MI SE NEBO, Pike, IL

Built 1983 Load: 32.4 t ADT: 75

TR 79

Fair

Over: PIGEON CREEK

2.25 MI N HULL, Pike, IL

Built 1983 Load: 32.4 t ADT: 25

TR 314

Fair

Over: MCKEE CR. TRIBUTARY

2.25 MI NW PERRY, Pike, IL

Built 1983 Load: 32.4 t ADT: 50

TR 133

Fair

Over: DUTCH CREEK

2 MI NE OF ROCKPORT, Pike, IL

Built 1984 Load: 32.4 t ADT: 50

TR 237

Fair

Over: KISER CR. TRIBUTARY

4.0 MI S BAYLIS, Pike, IL

Built 1983 Load: 32.4 t ADT: 50

TR 237

Fair

Over: BAY CREEK

3.0 MI S NEW SALEM, Pike, IL

Built 1984 Load: 32.4 t ADT: 75

TR 184

Fair

Over: 6 MILE CREEK

4.0 MI SE SUMMER HIL, Pike, IL

Built 1986 Load: 32.4 t ADT: 50

TR 16

Fair

Over: DRAINAGE DITCH

4 NW OF HULL, Pike, IL

Built 1984 Load: 32.4 t ADT: 25

TR 313

Fair

Over: BR.OF LITTLE BLUE CR

1 MILE NE OF MILTON, Pike, IL

Built 1984 Load: 32.4 t ADT: 25

TR 80

Fair

Over: BR. OF KISER CREEK

0.25 MI N NEW CANTON, Pike, IL

Built 1985 Load: 32.4 t ADT: 150

TR 239

Fair

Over: BAY CREEK TRIBUTARY

3 MI N OF PITTSFIELD, Pike, IL

Built 1984 Load: 32.4 t ADT: 100

TR 113

Fair

Over: BEEBEE CREEK

2.6 MILE NW BARRY, Pike, IL

Built 1985 Load: 32.4 t ADT: 25

TR 268

Fair

Over: BROWER CREEK

2.5 MI E FISHOOK, Pike, IL

Built 1986 Load: 32.4 t ADT: 25

TR 237

Fair

Over: KISER CR. TRIBUTARY

6.5 MI NW PITTSFIELD, Pike, IL

Built 1984 Load: 32.4 t ADT: 50

TR 148

Fair

Over: HADLEY CR

4.0 MI NE BARRY, Pike, IL

Built 1986 Load: 32.4 t ADT: 50

TR 115

Fair

Over: BRANCH OF HADLEY CR.

2MI NW BAYLIS, Pike, IL

Built 1988 Load: 32.4 t ADT: 50

TR 314

Fair

Over: MIDDLE FORK MCKEE CK

2.3MI WEST OF PERRY, Pike, IL

Built 1988 Load: 32.4 t ADT: 50

TR 330

Fair

Over: MID FORK MCKEE CREEK

1.0 MI N PERRY, Pike, IL

Built 1989 Load: 32.4 t ADT: 25

TR 366

Fair

Over: SO. FRK MCKEE CREEK

2.1MI. SO. PERRY, Pike, IL

Built 1989 Load: 32.4 t ADT: 50

TR 18

Fair

Over: RUNNING SLOUGH

3 SW OF HULL, Pike, IL

Built 1987 Load: 32.4 t ADT: 25

TR 359

Fair

Over: BAY CREEK

2 MI SE TIME, Pike, IL

Built 1994 Load: 32.4 t ADT: 50

TR 470 A

Fair

Over: LITTLE BLUE CREEK

1.3 MILE N. MILTON, Pike, IL

Built 1987 Load: 32.4 t ADT: 25

TR 405

Fair

Over: BUCKHORN CREEK

2.5 M NO. PEARL, Pike, IL

Built 1987 Load: 32.4 t ADT: 25

TR 497

Fair

Over: BEE CREEK

4.0 S OF PEARL, Pike, IL

Built 1988 Load: 32.4 t ADT: 75

TR 289

Fair

Over: TRIB SIX MILE CREEK

0.11M W US36&54 WYE, Pike, IL

Built 1990 Load: 32.4 t ADT: 50

TR 250A

Fair

Over: BAY CREEK

2MI S NEW SALEM, Pike, IL

Built 1989 Load: 32.4 t ADT: 25

TR 0317A

Fair

Over: GIBSON DITCH

4MI SE NEW CANTON, Pike, IL

Built 1992 Load: 32.4 t ADT: 25

TR 304

Fair

Over: PANTHER CREEK

0.5 MI N PITTSFIELD, Pike, IL

Built 1989 Load: 32.4 t ADT: 50

TR 304

Fair

Over: BAY CREEK

1.3 MI N PITTSFIELD, Pike, IL

Built 1989 Load: 32.4 t ADT: 50

TR 319

Fair

Over: SIXMILE CR TRIBUTARY

3.2 MI SW PITTSFIELD, Pike, IL

Built 2002 Load: 32.4 t ADT: 25

TR 47

Fair

Over: MIDDLE FRK MCKEE TRB

1.3MI E,NE PERRY, Pike, IL

Built 1990 Load: 32.4 t ADT: 50

TR 228

Fair

Over: BAY CREEK

.47 MW NEW SALEM, Pike, IL

Built 1992 Load: 32.4 t ADT: 50

FAS 596

Fair

Over: UNNAMED STREAM

2.2 MI S BARRY, Pike, IL

Built 1991 Load: 32.4 t ADT: 500

FAS 596

Fair

Over: HORN HOLLOW STREAM

1.0MI NE NEW CANTON, Pike, IL

Built 1991 Load: 32.4 t ADT: 500

TR 274

Fair

Over: PANTHER CREEK

1.5 NW PITTSFIELD, Pike, IL

Built 1992 Load: 32.4 t ADT: 350

TR 85A

Fair

Over: HADLEY CR TRIBUTARY

2.5MI SW OF BEVERLY, Pike, IL

Built 1992 Load: 32.4 t ADT: 25

TR 325

Fair

Over: DUTCH CREEK

1.5MINEROCKPORT, Pike, IL

Built 1996 Load: 32.4 t ADT: 25

TR 269

Fair

Over: BAY CREEK

1.5 MI E PITTSFIELD, Pike, IL

Built 1994 Load: 32.4 t ADT: 25

TR 330

Fair

Over: MIDDLE FK MCKEE TRIB

1.5MI N PERRY, Pike, IL

Built 1996 Load: 32.4 t ADT: 25

TR 268

Fair

Over: MIDDLE FORK MCKEE CR

4.0 MI. W. PERRY, Pike, IL

Built 1996 Load: 32.4 t ADT: 25

TR 123

Fair

Over: TRIB TO THE SNY

1.5 MI N HULL, Pike, IL

Built 1999 Load: 32.4 t ADT: 25

TR 381

Fair

Over: HONEY CREEK

3MI N NEBO, Pike, IL

Built 1997 Load: 32.4 t ADT: 50

TR 301

Fair

Over: SIXMILE CREEK

2.0 MI SW PITTSFIELD, Pike, IL

Built 1999 Load: 32.4 t ADT: 50

TR 194

Fair

Over: FISHHOOK CREEK

1.6MI WSW FISHHOOK, Pike, IL

Built 1997 Load: 32.4 t ADT: 25

TR 194

Fair

Over: BRANCH FISHHOOK CR

1.6MI WSW FISHHOOK, Pike, IL

Built 1997 Load: 32.4 t ADT: 25

TR 191A

Fair

Over: WALNUT CREEK

1.25 MI SW HULL, Pike, IL

Built 1999 Load: 32.4 t ADT: 25

TR 245

Fair

Over: BLUE CR TRIB

2.0 MI NW DETROIT, Pike, IL

Built 2002 Load: 32.4 t ADT: 50

TR 102

Fair

Over: HADLEY CK TRIB

0.5 MI NW BARRY, Pike, IL

Built 2005 Load: 32.4 t ADT: 25

TR 64

Fair

Over: THE SNY

6.0 MI NW ROCKPORT, Pike, IL

Built 2000 Load: 32.4 t ADT: 50

Showing 9,301-9,350 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.