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

CH 1 (FAS 573)

Good

Over: Trib Allens Grove Di

3 Mi E of Greenview, Menard, IL

Built 2013 Load: 32.4 t ADT: 325

TR-35

Good

Over: Little Grove Creek

2 MI SW of Oakford, Menard, IL

Built 2017 Load: 32.4 t ADT: 25

TR 200

Good

Over: HEMP FACTORY BR

0.1 MI S PETERSBURG, Menard, IL

Built 1982 Load: 32.4 t ADT: 750

OR-3

Good

Over: Rocky Branch

New Salem State Park, Menard, IL

Built 2018 Load: 32.4 t ADT: 25

FAS 1405 CH 12

Good

Over: N. HENDERSON BRANCH

SW-14-T13NR1W, Mercer, IL

Built 2016 Load: 32.4 t ADT: 50

FAS 217 (CH 6)

Good

Over: Maids Run

NE-14-T13NR3W, Mercer, IL

Built 2012 Load: 32.4 t ADT: 75

FAS 214-CH 13

Good

Over: POPE CREEK

W.CTR-12-T13NR4W, Mercer, IL

Built 2008 Load: 32.4 t ADT: 200

FAS 1210

Good

Over: STREAM

NE SEC 4 T14N R5W, Mercer, IL

Built 1994 Load: 32.4 t ADT: 100

FAS 209-CH 14

Good

Over: ELIZA CREEK N.

CTR-7-T15NR5W, Mercer, IL

Built 1978 Load: 32.4 t ADT: 1,450

FAS 209(CH 14)

Good

Over: UNNAMED STREAM

1.14 S ROCK ISLANDCO, Mercer, IL

Built 2004 Load: 32.4 t ADT: 1,450

FAS 209-CH 14

Good

Over: KEATING DITCH

SE-7-T15NR5W, Mercer, IL

Built 2008 Load: 32.4 t ADT: 1,450

FAS 215-CH 16

Good

Over: SNAKE CREEK

SE-23-T13NR4W, Mercer, IL

Built 2020 Load: 32.4 t ADT: 300

TR 274

Good

Over: HENDERSON CREEK

E.CTR-16-T13NR1W, Mercer, IL

Built 1984 Load: 32.4 t ADT: 25

TR 196

Good

Over: DUCK CREEK

NW-31-T13NR2W, Mercer, IL

Built 1984 Load: 32.4 t ADT: 25

TR 207

Good

Over: POPE CREEK

NE-2-T13NR2W, Mercer, IL

Built 1988 Load: 32.4 t ADT: 25

TR 196

Good

Over: N. HENDERSON CREEK

SW-19-T13NR2W, Mercer, IL

Built 1986 Load: 32.4 t ADT: 25

TR 210

Good

Over: N. HENDERSON CREEK

SW-22-T13NR2W, Mercer, IL

Built 1992 Load: 32.4 t ADT: 25

TR228

Good

Over: POPE CREEK

NW-1-T-13N RW, Mercer, IL

Built 2015 Load: 32.4 t ADT: 10

TR 120

Good

Over: HENDERSON CREEK

SW-30-T13NR3W, Mercer, IL

Built 1984 Load: 32.4 t ADT: 25

TR 162

Good

Over: POPE CREEK

N.CTR-3-T13NR3W, Mercer, IL

Built 1987 Load: 32.4 t ADT: 25

TR 225

Good

Over: POPE CREEK

W.CTR-4-T13NR3W, Mercer, IL

Built 1991 Load: 32.4 t ADT: 35

TR 225

Good

Over: BR. OF POPE CREEK

W-4-T13NR3W, Mercer, IL

Built 1991 Load: 32.4 t ADT: 35

TR 253

Good

Over: HENDERSON CREEK

CTR-30-T13NR3W, Mercer, IL

Built 1994 Load: 32.4 t ADT: 50

TR 162

Good

Over: DUCK CREEK

NW-35-T13NR3W, Mercer, IL

Built 1997 Load: 32.4 t ADT: 25

TR 162

Good

Over: HENDERSON CREEK

NW-26-T31NR3W, Mercer, IL

Built 2016 Load: 32.4 t ADT: 50

TR 44

Good

Over: POPE CREEK

CTR,NW-8-T13NR4W, Mercer, IL

Built 1977 Load: 32.4 t ADT: 100

TR 213

Good

Over: STREAM

NW-7-T13NR4W, Mercer, IL

Built 1985 Load: 32.4 t ADT: 25

TR 100

Good

Over: WILDCAT CREEK

NW-3-T13NR4W, Mercer, IL

Built 1999 Load: 32.4 t ADT: 10

TR 42

Good

Over: POPE CREEK

N EDGE OF KEITHSBURG, Mercer, IL

Built 1990 Load: 32.4 t ADT: 10

TR 284

Good

Over: BRANCH OF POPE CREEK

NW-36-T14NR1W, Mercer, IL

Built 1981 Load: 32.4 t ADT: 25

TR 268

Good

Over: POPE CR

S.CTR-21-T14NR1W, Mercer, IL

Built 1987 Load: 32.4 t ADT: 100

TR 107

Good

Over: STREAM

N.CTR-2-T14NR1W, Mercer, IL

Built 1988 Load: 32.4 t ADT: 25

TR 240

Good

Over: DONAHUE RUN

NW-7-T14NR1W, Mercer, IL

Built 1991 Load: 32.4 t ADT: 50

TR 260

Good

Over: N. POPE CREEK

CTR-20-T14NR1W, Mercer, IL

Built 1992 Load: 32.4 t ADT: 75

TR 252

Good

Over: DONOHUE RUN

NW COR-8-T14NR1W, Mercer, IL

Built 1996 Load: 32.4 t ADT: 25

TR 266

Good

Over: TRIB TO EDWARDS RIV

WLINE NW1/4 T14NR1W, Mercer, IL

Built 1998 Load: 32.4 t ADT: 25

TR 274

Good

Over: POPE CREEK

E.CTR-21-T14NR1W, Mercer, IL

Built 2006 Load: 32.4 t ADT: 25

TR 183A

Good

Over: STREAM

CTR-28-T14NR2W, Mercer, IL

Built 1992 Load: 32.4 t ADT: 25

TR 198A

Good

Over: EDWARDS RIVER

NW-6-T14NR2W, Mercer, IL

Built 1998 Load: 32.4 t ADT: 25

TR 230

Good

Over: DONAHUE RUN

SE-2-T14NR2W, Mercer, IL

Built 2009 Load: 32.4 t ADT: 25

TR 136B

Good

Over: PIKE RUN CREEK

E.CTR-30-T14NR3W, Mercer, IL

Built 1984 Load: 32.4 t ADT: 175

TR 158

Good

Over: PIKE RUN

W.CTR-28-T14NR3W, Mercer, IL

Built 1992 Load: 32.4 t ADT: 325

TR 132

Good

Over: EDWARDS RIVER

NE-7-T14NR3W, Mercer, IL

Built 2007 Load: 32.4 t ADT: 50

TR 193A

Good

Over: WILDCAT CREEK

CTR-33-T14NR4W, Mercer, IL

Built 1984 Load: 32.4 t ADT: 25

TR 100A

Good

Over: WILDCAT CREEK

SE-28-T14NR4W, Mercer, IL

Built 1991 Load: 32.4 t ADT: 25

TR 52

Good

Over: EDWARDS RIVER

SE-2-T14NR5W, Mercer, IL

Built 1990 Load: 32.4 t ADT: 25

TR 109

Good

Over: ELIZA CREEK

SE-1-T14NR6W, Mercer, IL

Built 1994 Load: 32.4 t ADT: 50

TR 111

Good

Over: WINTERS CREEK

W.CTR-3-T14NR5W, Mercer, IL

Built 1997 Load: 32.4 t ADT: 25

TR 2

Good

Over: CAMP CREEK

SE-12-T15NR1W, Mercer, IL

Built 1980 Load: 32.4 t ADT: 50

TR 262

Good

Over: EDWARDS RIVER

SE-29-T15NR1W, Mercer, IL

Built 2005 Load: 32.4 t ADT: 50

Showing 19,601-19,650 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.