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

FAS 601

Fair

Over: PANTHER CREEK

1.5 MI N PITTSFIELD, Pike, IL

Built 2002 Load: 32.4 t ADT: 1,350

TR 323

Fair

Over: THE SNY

1.5 MI NW ROCKPORT, Pike, IL

Built 2003 Load: 32.4 t ADT: 25

TR 7

Fair

Over: MIDDLE FK MCKEE TRIB

3.0 MI N PERRY, Pike, IL

Built 2002 Load: 32.4 t ADT: 25

TR 464A

Fair

Over: BETTELL CREEK

1.75 MI N PEARL, Pike, IL

Built 2003 Load: 32.4 t ADT: 25

TR 231

Fair

Over: BOYD DITCH

2.0 MI SE KINDERHOOK, Pike, IL

Built 2005 Load: 32.4 t ADT: 25

TR 252

Fair

Over: PANTHER CREEK

4 M NW PITTSFIELD, Pike, IL

Built 2006 Load: 32.4 t ADT: 50

TR 398

Fair

Over: Blue Creek

2 M. N. Il. Rte. 106, Pike, IL

Built 2013 Load: 32.4 t ADT: 75

TR 512

Fair

Over: BETTELL CREEK

.5 M N PEARL, Pike, IL

Built 2004 Load: 32.4 t ADT: 75

FAS 601

Fair

Over: BAY CREEK

3 M N PITTSFIELD, Pike, IL

Built 2007 Load: 32.4 t ADT: 1,350

TR 52

Fair

Over: SPIDER BRANCH

3 M N KINDERHOOK, Pike, IL

Built 2007 Load: 32.4 t ADT: 25

TR 289

Fair

Over: DUTCH CR TRIB

4 M W PITTSFLD, Pike, IL

Built 2006 Load: 32.4 t ADT: 50

TR 148

Fair

Over: TRIB KISER CREEK

3.2 M SE BARRY, Pike, IL

Built 2010 Load: 32.4 t ADT: 50

TR 127

Fair

Over: TRIB HADLEY CR

2.5 M N BARRY, Pike, IL

Built 2011 Load: 32.4 t ADT: 50

TR 359

Fair

Over: HONEY CREEK

2 M E INDEPENDENCE, Pike, IL

Built 2011 Load: 32.4 t ADT: 50

TR 205

Fair

Over: BAY CREEK

5 M N PITTSFIELD, Pike, IL

Built 2012 Load: 32.4 t ADT: 25

FAS 608 (CH 10)

Fair

Over: TRIB TO BAY CR

1.75 M W NEBO, Pike, IL

Built 2011 Load: 32.4 t ADT: 725

FAS 600 CH 8

Fair

Over: HONEY CR TRIB

1.1 M E CH 7, Pike, IL

Built 1996 Load: 32.4 t ADT: 600

ILL 145

Fair

Over: STREAM

1 MI E GLENDALE, Pope, IL

Built 1949 Load: 32.4 t ADT: 1,200

TR 64

Fair

Over: FLAT LICK CREEK

.75M W OF BROWNFIELD, Pope, IL

Built 1978 Load: 32.4 t ADT: 75

TR 14

Fair

Over: LITTLE SALINE RIVER

2 MI S OF STONEFORT, Pope, IL

Built 1978 Load: 32.4 t ADT: 25

TR 55

Fair

Over: BIG GRAND PIERRE BR

2.5 MI W OF EICHORN, Pope, IL

Built 1977 Load: 32.4 t ADT: 25

TR 55

Fair

Over: BIG GRAND PIERRE CR.

2 MI. W. OF EICHORN, Pope, IL

Built 1977 Load: 32.4 t ADT: 25

TR 88A

Fair

Over: BAY CR DITCH

2 MI EAST RT 145, Pope, IL

Built 1978 Load: 32.4 t ADT: 50

TR 6

Fair

Over: HAYES CREEK

1 MILE SOUTH ROBBS, Pope, IL

Built 1980 Load: 32.4 t ADT: 25

TR 157A CLANAHAN R

Fair

Over: BAY CREEK

SW1/4 SEC15 T14S R6E, Pope, IL

Built 1981 Load: 32.4 t ADT: 150

TR 24

Fair

Over: LITTLE SALINE RIVER

1.83 MI S OF SALINE, Pope, IL

Built 1985 Load: 32.4 t ADT: 25

TR 146

Fair

Over: E FORK LIT LUST CR

5 MI SW OF HEROD, Pope, IL

Built 1985 Load: 32.4 t ADT: 50

TR 9

Fair

Over: TRIB LITTLE LUSK CR

3.5 MI W HEROD, Pope, IL

Built 1997 Load: 32.4 t ADT: 25

TR 137

Fair

Over: BAY CREEK

1.5M W OF HOMBERG, Pope, IL

Built 2007 Load: 32.4 t ADT: 50

TR 75

Fair

Over: BOAR CREEK

2 MI NE VILLA RIDGE, Pulaski, IL

Built 1977 Load: 32.4 t ADT: 25

TWP RD 46

Fair

Over: BOAR CREEK

1 MI NE VILLA RIDGE, Pulaski, IL

Built 1985 Load: 32.4 t ADT: 10

TR 144

Fair

Over: TRIB-POST CR CUTOFF

2 MI SE KARNAK, Pulaski, IL

Built 1988 Load: 32.4 t ADT: 25

TR 7B

Fair

Over: TRIB TO CACHE RIVER

4.5 MI NE OF ULLIN, Pulaski, IL

Built 1989 Load: 32.4 t ADT: 75

TR 46

Fair

Over: SOW CREEK

2.5 MI N VILLA RIDGE, Pulaski, IL

Built 1990 Load: 32.4 t ADT: 10

TR 114-ACCESS RD

Fair

Over: CYPRESS CK

1.5 MI NE OF PERKS, Pulaski, IL

Built 2001 Load: 32.4 t ADT: 50

TR 84

Fair

Over: CACHE RIVER

3 MI E OF ULLIN, Pulaski, IL

Built 1997 Load: 32.4 t ADT: 75

TR 49

Fair

Over: BRIAR CREEK

0.25 MI N PULASKI, Pulaski, IL

Built 1998 Load: 32.4 t ADT: 100

TR 78

Fair

Over: HODGES CR TRIB

2 MI W OLMSTED, Pulaski, IL

Built 2003 Load: 32.4 t ADT: 25

TR 128-N KARNAK RD

Fair

Over: CACHE RIVER

PULASKI/JOHNSON COLI, Pulaski, IL

Built 1998 Load: 32.4 t ADT: 50

TWP RD 1

Fair

Over: LITTLE CK

.25 MILE EAST WETAG, Pulaski, IL

Built 2005 Load: 32.4 t ADT: 10

Railroad Street

Fair

Over: Indian Camp Creek

Ullin, Pulaski, IL

Built 2012 Load: 32.4 t ADT: 275

TR2

Fair

Over: CROW CREEK

310N, 50E, Putnam, IL

Built 1981 Load: 32.4 t ADT: 50

TR 82

Fair

Over: ALLFORKS CREEK

1220N, 1175E, Putnam, IL

Built 1981 Load: 32.4 t ADT: 150

TR 74

Fair

Over: ALLFORKS CREEK

1220N, 1140E, Putnam, IL

Built 1983 Load: 32.4 t ADT: 100

TR 65

Fair

Over: TRIBUTARY TO CROW CR

400N 200E, Putnam, IL

Built 1984 Load: 32.4 t ADT: 25

TR 98

Fair

Over: LITTLE SANDY CR

1450E 130N, Putnam, IL

Built 1985 Load: 32.4 t ADT: 25

TR 94A

Fair

Over: ALLFORKS CREEK

1300E 1180N, Putnam, IL

Built 1985 Load: 32.4 t ADT: 100

CH 4

Fair

Over: CLEAR CREEK

625N, 1200E, Putnam, IL

Built 1986 Load: 32.4 t ADT: 125

TR 73

Fair

Over: CLEAR CREEK

300 N, 1060E, Putnam, IL

Built 1991 Load: 32.4 t ADT: 25

TR 7

Fair

Over: ALLFORKS CREEK

1250N, 950E, Putnam, IL

Built 1994 Load: 32.4 t ADT: 200

Showing 9,351-9,400 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.