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 811

Good

Over: FORDICE CR LATERAL

1.75 MI S GARDS PT, Wabash, IL

Built 2004 Load: 32.4 t ADT: 275

TR 125

Good

Over: GREATHOUSE CREEK

1 MI NW MT CARMEL, Wabash, IL

Built 2005 Load: 32.4 t ADT: 150

TR-117

Good

Over: DRAINAGE DITCH

3 MI SSE GARDS POINT, Wabash, IL

Built 2007 Load: 32.4 t ADT: 25

TR-145

Good

Over: Coffee Creek Trib

2 MI NE KEENSBURG, Wabash, IL

Built 2013 Load: 32.4 t ADT: 35

TR 151

Good

Over: DRAINAGE DITCH

1 MI S BELLMONT, Wabash, IL

Built 2009 Load: 32.4 t ADT: 25

TR 89

Good

Over: CREEK

4 MI S OF LANCASTER, Wabash, IL

Built 2008 Load: 32.4 t ADT: 50

TR 37

Good

Over: CRAWFISH CREEK

2.25 NE FRIENDSVILLE, Wabash, IL

Built 2010 Load: 32.4 t ADT: 75

TR 52

Good

Over: DRAINAGE DITCH

2.25 MI SSE GARDS PT, Wabash, IL

Built 2012 Load: 32.4 t ADT: 75

TR 9

Good

Over: CREEK

4.5 MI WNW LANCASTER, Wabash, IL

Built 2013 Load: 32.4 t ADT: 50

TR 149

Good

Over: COFFEE CREEK

1.5 MI N KEENSBURG, Wabash, IL

Built 2015 Load: 32.4 t ADT: 100

TR 87

Good

Over: Crawfish Creek

1.5 Mi. NW Patton, Wabash, IL

Built 2016 Load: 32.4 t ADT: 50

TR 95

Good

Over: Crawfish Creek

0.5 Mi. W Paton, Wabash, IL

Built 2016 Load: 32.4 t ADT: 100

TR-101

Good

Over: Fordice Creek

2 mi SE Gards Point, Wabash, IL

Built 2017 Load: 32.4 t ADT: 50

TR 4

Good

Over: DRAINAGE DITCH

4.5 MI W KEENSBURG, Wabash, IL

Built 2011 Load: 32.4 t ADT: 50

US 67

Good

Over: DRAINAGE DITCH

0.5 MI N WARREN LN, Warren, IL

Built 1996 Load: 32.4 t ADT: 4,850

FAS 1405-CH 2

Good

Over: HENDERSON CREEK

E.CTR-14-T12NR1W, Warren, IL

Built 1994 Load: 32.4 t ADT: 225

FAS 404-CH 23

Good

Over: CEDAR FORK CREEK

NW-1-T9NR1W, Warren, IL

Built 1994 Load: 32.4 t ADT: 475

CH 27

Good

Over: OLD TOM CREEK

SW1/4-33-T11NR3W, Warren, IL

Built 2002 Load: 32.4 t ADT: 650

FAS 407-CH 15

Good

Over: PICAYUNE CREEK

NE-20-T9NR1W, Warren, IL

Built 2001 Load: 32.4 t ADT: 150

FAS 405 - CH 1

Good

Over: MIDDLE HENDERSON CR

NW-7-T12NR1W, Warren, IL

Built 2006 Load: 32.4 t ADT: 1,300

FAS 413 - CH 11

Good

Over: SOUTH FORK CR

NW-4-T9NR3W, Warren, IL

Built 2005 Load: 32.4 t ADT: 300

FAS 405 - CH 1

Good

Over: TALBOT CR

1.1 MILE N IL 164, Warren, IL

Built 2008 Load: 32.4 t ADT: 850

FAS 405 - CH 1

Good

Over: HEND CR OVRFL

E.CTR-13-T12NR2W, Warren, IL

Built 2015 Load: 32.4 t ADT: 900

FAS-407 (CH-8)

Good

Over: Swan Creek

SW-13-T8NR1W, Warren, IL

Built 2017 Load: 32.4 t ADT: 225

TR 231

Good

Over: NEGRO CREEK

SW-6-T8NR1W, Warren, IL

Built 1985 Load: 32.4 t ADT: 25

TR 238A

Good

Over: CEDAR CR

SE-1-T8NR1W, Warren, IL

Built 1987 Load: 32.4 t ADT: 50

TR 216

Good

Over: SWAN CREEK

NW-14-T8NR1W, Warren, IL

Built 1990 Load: 32.4 t ADT: 10

TR 204

Good

Over: SWAN CREEK

NW-15-T8NR1W, Warren, IL

Built 1993 Load: 32.4 t ADT: 25

TR 216

Good

Over: BRANCH OF SWAN CREEK

SW-14-T8NR1W, Warren, IL

Built 1998 Load: 32.4 t ADT: 10

TR 184

Good

Over: DROWNING FORK

NW-33-T8NR1W, Warren, IL

Built 2008 Load: 32.4 t ADT: 150

TR 225

Good

Over: NEGRO CREEK

S.CTR-31-T9NR1W, Warren, IL

Built 1985 Load: 32.4 t ADT: 25

TR 201

Good

Over: CEDAR FORK CREEK

SE-10-T9NR1W, Warren, IL

Built 1989 Load: 32.4 t ADT: 50

TR 201

Good

Over: BR CEDAR FK CR

SW-10-T9NR1W, Warren, IL

Built 1995 Load: 32.4 t ADT: 50

TR 206

Good

Over: BRANCH CEDAR FORK CR

SE-9-T9N-R1W, Warren, IL

Built 1999 Load: 32.4 t ADT: 75

TR 202

Good

Over: PICAYUNE CREEK

NE-21-T9NR1W, Warren, IL

Built 2003 Load: 32.4 t ADT: 50

TR 175

Good

Over: BR CEDAR FORK

TR 175 OV BR CEDAR F, Warren, IL

Built 1982 Load: 32.4 t ADT: 75

TR 171

Good

Over: CEDAR FORK CREEK

SE SEC 24 T10NR1W, Warren, IL

Built 1985 Load: 32.4 t ADT: 75

TR 153

Good

Over: SLUG RUN

NW-16-TIONR1W, Warren, IL

Built 1987 Load: 32.4 t ADT: 25

TR 153

Good

Over: SLUG RUN

SE-9-T10NR1W, Warren, IL

Built 1988 Load: 32.4 t ADT: 25

TR 188

Good

Over: BR. CEDAR FORK CREEK

T10N-1RW-4TH PM, Warren, IL

Built 1996 Load: 32.4 t ADT: 50

TR 218

Good

Over: BR. OF CEDAR FORK CR

SW-35-T10NR1W, Warren, IL

Built 1995 Load: 32.4 t ADT: 100

TR 175

Good

Over: CEDAR FORK CREEK

SW-25-T10NR1W, Warren, IL

Built 2002 Load: 32.4 t ADT: 75

TR 206

Good

Over: BR OF CEDAR FORK

SW SEC34 T10N-R1W, Warren, IL

Built 2009 Load: 32.4 t ADT: 25

TR 174B

Good

Over: TRIB. CEDAR CREEK

NW-32-T11NR1W, Warren, IL

Built 1990 Load: 32.4 t ADT: 225

TR 206

Good

Over: CEDAR CREEK

SE-21-T11NR1W, Warren, IL

Built 1994 Load: 32.4 t ADT: 75

TR 6B

Good

Over: BRANCH OF CEDAR CRK

1 MI S US 34, Warren, IL

Built 2001 Load: 32.4 t ADT: 25

TR 190

Good

Over: HENDERSON CR

NE-20-T12NR1W, Warren, IL

Built 1982 Load: 32.4 t ADT: 50

TR 53

Good

Over: BR. HENDERSON CREEK

W CTR 26-T12NR1W, Warren, IL

Built 1987 Load: 32.4 t ADT: 75

TR 190

Good

Over: TRB MIDDLE HENDERSON

NE-5-T12NR1W, Warren, IL

Built 1989 Load: 32.4 t ADT: 50

TR 178

Good

Over: BR MID HEND CR

SW-5-T12NR1W, Warren, IL

Built 1991 Load: 32.4 t ADT: 50

Showing 21,301-21,350 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.