State profile · Near median Poor share

Illinois bridge safety

Condition ratings, load ratings, and Poor-condition data for every public highway bridge in Illinois, based on the FHWA National Bridge Inventory.

27,743
Public bridges
41.2%
Good condition
7.9%
Poor condition

Data updated May 2026

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 whose lowest applicable component is rated 0-4

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 - Poor-condition share 26.3%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Condition Distribution

Illinois48.2%42.6%9.2%GoodFairPoor
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 by Poor-condition share (lower share = better)

States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below Illinois on the same metric.

RI

Rhode Island

7.69% top marginal rate
Structure
Progressive
Burden @ $100K
$78

NE

Nebraska

7.73% top marginal rate
Structure
Progressive
Burden @ $100K
$15,571
Selected

IL

Illinois

7.88% top marginal rate
Structure
Progressive
Burden @ $100K
$27,743

MA

Massachusetts

7.96% top marginal rate
Structure
Progressive
Burden @ $100K
$5,314

MO

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 the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.

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

Poor

Over: WILSON CREEK

NE-35-T3NR2E, Fulton, IL

Built 1935 Load: 1.3 t ADT: 10

TR 10-B

Poor

Over: KING CREEK

W EDGE OF MINERAL, Bureau, IL

Built 1899 Load: 1.6 t ADT: 10

TR-6

Poor

Over: DRAINAGE DITCH

3.5 MI NE DIETERICH, Effingham, IL

Built 1909 Load: 1.6 t ADT: 25

TR208K(TWIN BRIDGE

Poor

Over: BIG CREEK

NE EDGE MT ZION, Macon, IL

Built 1967 Load: 1.9 t ADT: 375

All Bridges in Illinois

GRANGE HALL RD

Good

Over: E BR PISCASAW CR

2.5 M SE POPLAR GROV, Boone, IL

Built 1986 Load: 32.4 t ADT: 50

BLOODS POINT ROAD

Good

Over: CN RR

1.5 MI E WINN CO LN, Boone, IL

Built 1991 Load: 32.4 t ADT: 550

CALEDONIA RD

Good

Over: BEAVER CREEK

2.5 M N. OF BELVIDER, Boone, IL

Built 2003 Load: 32.4 t ADT: 3,350

MARENGO RD (TR 77)

Good

Over: MUD CREEK

1.5 MI N GARDN PRARI, Boone, IL

Built 1994 Load: 32.4 t ADT: 2,000

LAWRENCEVILLE RD

Good

Over: MUD CREEK

1.5MI. NW GARDEN PR., Boone, IL

Built 2000 Load: 32.4 t ADT: 1,400

COUNTY LINE RD

Good

Over: BR PISCASAW CREEK

1.5 MI E OF CAPRON, Boone, IL

Built 2004 Load: 32.4 t ADT: 600

GARDEN PRAIRIE RD

Good

Over: COON CREEK

1.5 MI S GARDEN PR, Boone, IL

Built 2005 Load: 32.4 t ADT: 475

IRENE RD

Good

Over: UNNAMED CREEK

1.5MI S OF US 20, Boone, IL

Built 2007 Load: 32.4 t ADT: 1,650

RIVERSIDE ROAD

Good

Over: BR OF BEAVER CR

3.5MI NE OF BELVIDER, Boone, IL

Built 2007 Load: 32.4 t ADT: 2,350

COUNTY LINE RD

Good

Over: SPRING CREEK

2 MI SE GARDEN PRAIR, Boone, IL

Built 2016 Load: 32.4 t ADT: 100

CENTERVILLE RD

Good

Over: BEAVER CREEK

2 MI W OF CAPRON, Boone, IL

Built 2013 Load: 32.4 t ADT: 150

GARDEN PRAIRIE

Good

Over: KISHWAUKEE RIVER

.5 MI N US 20, Boone, IL

Built 2015 Load: 32.4 t ADT: 2,850

POPLAR GROVE RD

Good

Over: KISHWAUKEE RIVER

NE EDGE OF BELVIDERE, Boone, IL

Built 2020 Load: 32.4 t ADT: 2,200

LIVINGSTON SCHOOL

Good

Over: SOUTH KINNIKINNICK C

3.0 MI N CALEDONIA, Boone, IL

Built 2021 Load: 32.4 t ADT: 50

TOWNLINE RD

Good

Over: BR N KINNINNICK CR

NW CORNER BOONE CO., Boone, IL

Built 1960 Load: 32.4 t ADT: 100

CALEDONIA ROAD

Good

Over: S. KINNIKINNICK CR.

3.3 MI. N. CALEDONIA, Boone, IL

Built 1995 Load: 32.4 t ADT: 1,000

POPLAR GROVE RD

Good

Over: BR. OF BEAVER CREEK

1.75 MI. N. OF IL173, Boone, IL

Built 1998 Load: 32.4 t ADT: 1,350

PEARL STREET RD

Good

Over: KINGSBURY CREEK

AT DEKALB CO. LINE, Boone, IL

Built 1999 Load: 32.4 t ADT: 500

IRENE RD

Good

Over: UNNAMED CRK

0.25 MI S OF US 20, Boone, IL

Built 1900 Load: 32.4 t ADT: 3,200

ORTH ROAD

Good

Over: BR OF BEAVER CREEK

0.6 MI. W. OF IL 76, Boone, IL

Built 2009 Load: 32.4 t ADT: 1,650

TOWN HALL ROAD

Good

Over: UNNAMED STREAM

0.25MI S OF US 20, Boone, IL

Built 2010 Load: 32.4 t ADT: 4,950

CH 6

Good

Over: CRONIN HOLLOW

2.0 MI SW BUCKHORN, Brown, IL

Built 1999 Load: 32.4 t ADT: 400

TR 189

Good

Over: LITTLE MISSOURI CK

0.5 E. SILOM SPRINGS, Brown, IL

Built 1982 Load: 32.4 t ADT: 25

TR 81

Good

Over: LOGAN CRK

.5 MI SW OF NIOTA, Brown, IL

Built 2004 Load: 32.4 t ADT: 50

TR 230

Good

Over: YOLK CREEK

2.3 E COOPERSTOWN, Brown, IL

Built 2001 Load: 32.4 t ADT: 25

TR 151

Good

Over: BR LITTLE CREEK

3.8MI SE COOPERSTOWN, Brown, IL

Built 1991 Load: 32.4 t ADT: 75

TR 176

Good

Over: TRIB HAMILTON BR

4MI NW COOPERSTOWN, Brown, IL

Built 1998 Load: 32.4 t ADT: 50

TR 151

Good

Over: Baehr Branch

2.11 mi E TR 206, Brown, IL

Built 2014 Load: 32.4 t ADT: 75

TR 181

Good

Over: GILBIRDS CREEK

2 M NW VERSAILLES, Brown, IL

Built 2011 Load: 32.4 t ADT: 25

TR 177

Good

Over: AVERY BRANCH

4.5 M NW VERSAILLES, Brown, IL

Built 2007 Load: 32.4 t ADT: 50

TR 121

Good

Over: DRY FORK

2.8 MI SW MT STRLING, Brown, IL

Built 1984 Load: 32.4 t ADT: 25

TR 129

Good

Over: DRY FORK

2.5 M SW MT STERLING, Brown, IL

Built 2002 Load: 32.4 t ADT: 200

TR 141

Good

Over: WELLS FORK

0.9 mi E TR 10, Brown, IL

Built 2014 Load: 32.4 t ADT: 25

TR 103

Good

Over: WELLS FK CR

2 M S MOUND STATION, Brown, IL

Built 2007 Load: 32.4 t ADT: 25

TR 47

Good

Over: NORTH FORK

7.5 MI NE MT STERLNG, Brown, IL

Built 1987 Load: 32.4 t ADT: 25

TR 164

Good

Over: SHELBYCRK

2.5MNWRIPLEY, Brown, IL

Built 1996 Load: 32.4 t ADT: 25

TR 45

Good

Over: SOUTH FORK

3.75 NE MT STERLING, Brown, IL

Built 1998 Load: 32.4 t ADT: 75

TR 15

Good

Over: TRIB LITTLE MISSOURI

8.0MI N MT STERLING, Brown, IL

Built 1998 Load: 32.4 t ADT: 25

TR-55

Good

Over: Trib to N Fk Shelby

0.30 mi E IL 99, Brown, IL

Built 2017 Load: 32.4 t ADT: 25

TR 162

Good

Over: HAMILTON CREEK

2.0 MI S RIPLEY, Brown, IL

Built 2000 Load: 32.4 t ADT: 25

TR 45

Good

Over: W FORK HAMILTON CK

.75 NE MT STERLING, Brown, IL

Built 2005 Load: 32.4 t ADT: 200

TR 158

Good

Over: N. FRK OF LOGAN CRK.

3.3MI E MT. STERLING, Brown, IL

Built 1991 Load: 32.4 t ADT: 25

TR 156

Good

Over: CAMP CREEK

3.6 M NW VERSAILLES, Brown, IL

Built 1988 Load: 32.4 t ADT: 25

TR 143

Good

Over: N BR DRY FORK

2 MI W HERSMAN, Brown, IL

Built 1999 Load: 32.4 t ADT: 25

TR 126

Good

Over: TRIB TO WEST CREEK

1MI E MT STERLING, Brown, IL

Built 1997 Load: 32.4 t ADT: 250

TR 48

Good

Over: LITTLE MISSOURI

3.0 MI NE TIMEWELL, Brown, IL

Built 1983 Load: 32.4 t ADT: 50

TR 216

Good

Over: CAMP CREEK

2.5 E VERSAILES, Brown, IL

Built 1982 Load: 32.4 t ADT: 225

TR 216

Good

Over: MARTIN BRANCH

2.5 MI E VERSAILLES, Brown, IL

Built 1998 Load: 32.4 t ADT: 225

TR 132

Good

Over: AVERY BRANCH

3 MILES WEST VERSALS, Brown, IL

Built 1978 Load: 32.4 t ADT: 25

IL 29

Good

Over: stream

0.99 mi N 078 Co Ln, Bureau, IL

Built 1999 Load: 32.4 t ADT: 350

Showing 15,251-15,300 of 27,743 bridges

Related

All states → | National rankings → | Understanding conditions → | Retired SD term explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.

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). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.

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.

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.