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

TR 99A PATTON

Good

Over: STREAM

1390E 300N, Ford, IL

Built 1984 Load: 32.4 t ADT: 25

TR 82

Good

Over: BIG FOUR DITCH

4 MI SE PAXTON, Ford, IL

Built 1987 Load: 32.4 t ADT: 100

TR 79A DIX

Good

Over: STREAM

700N,1030E, Ford, IL

Built 1988 Load: 32.4 t ADT: 50

TR 71B WALL

Good

Over: WALL TOWN DR DITCH

1360E,1000N, Ford, IL

Built 1988 Load: 32.4 t ADT: 25

TR 64A LYMAN

Good

Over: STREAM

1760N 1700E, Ford, IL

Built 1986 Load: 32.4 t ADT: 25

TR 87 BUTTON

Good

Over: STREAM

2640E,600N, Ford, IL

Built 1987 Load: 32.4 t ADT: 25

TR 7 MONA

Good

Over: STREAM

1530E,3600N, Ford, IL

Built 1988 Load: 32.4 t ADT: 25

TR 25

Good

Over: STREAM

1230E, 2650N, Ford, IL

Built 1993 Load: 32.4 t ADT: 25

TR 6 DRUMMER

Good

Over: STREAM

640N, 100E, Ford, IL

Built 1991 Load: 32.4 t ADT: 25

TR 26A DIX

Good

Over: STREAM

120N, 700E, Ford, IL

Built 1991 Load: 32.4 t ADT: 125

FAS 1362 GALLAHUE

Good

Over: PELLA DR DITCH

1580E, 2800N, Ford, IL

Built 1995 Load: 32.4 t ADT: 50

TR 105 DRUMMER

Good

Over: STREAM

280E, 200N, Ford, IL

Built 1989 Load: 32.4 t ADT: 25

TR 44 LYMAN

Good

Over: WALL TWP DR DITCH

1240N, 1300E, Ford, IL

Built 1990 Load: 32.4 t ADT: 25

TR 34 PEACH ORCHAR

Good

Over: STREAM

1390N,1000E, Ford, IL

Built 1988 Load: 32.4 t ADT: 50

FAS 341 CH 3

Good

Over: WALL TOWN DITCH

1200N,1350E, Ford, IL

Built 1988 Load: 32.4 t ADT: 475

FAS342 CH24 CHTSW.

Good

Over: BIG FOUR DITCH

1420N, 900E, Ford, IL

Built 1989 Load: 32.4 t ADT: 250

FAS332 CH8 GALLAHU

Good

Over: STREAM

2830N, 1800E, Ford, IL

Built 1990 Load: 32.4 t ADT: 50

FAS341 CH3 MELVIN

Good

Over: STREAM

1480E, 1200N, Ford, IL

Built 1990 Load: 32.4 t ADT: 475

TR 59B LYMAN

Good

Over: WALL TOWN DR DITCH

1310 E, 1400 N, Ford, IL

Built 1991 Load: 32.4 t ADT: 50

TR 74PATTON

Good

Over: STREAM

2000E,40N., Ford, IL

Built 1995 Load: 32.4 t ADT: 200

TR 23 PELLA

Good

Over: STREAM

1390E,2700N, Ford, IL

Built 1994 Load: 32.4 t ADT: 25

TR 52 BRENTON

Good

Over: STREAM

2020N, 1400E, Ford, IL

Built 1991 Load: 32.4 t ADT: 50

TR 42B

Good

Over: STREAM

2770N, 1200E, Ford, IL

Built 1993 Load: 32.4 t ADT: 50

TR 92 BUTTON

Good

Over: SUGAR CREEK

210N, 2700E, Ford, IL

Built 1993 Load: 32.4 t ADT: 50

TR 37

Good

Over: TRIB. TO LITTLE MUD

1330E, 2300N, Ford, IL

Built 1993 Load: 32.4 t ADT: 25

TR 91 DIX

Good

Over: STREAM

1140E, 500N, Ford, IL

Built 1993 Load: 32.4 t ADT: 200

TR 57D LYMAN

Good

Over: WALL TOWN DITCH

1230E,1500N, Ford, IL

Built 1994 Load: 32.4 t ADT: 50

TR 68 PATTON

Good

Over: STREAM

590N,1800E, Ford, IL

Built 1994 Load: 32.4 t ADT: 25

TR 115 BUTTON

Good

Over: STREAM

2770E.100N, Ford, IL

Built 1994 Load: 32.4 t ADT: 25

TR 35A BRENTON

Good

Over: N FK VERMILION

1595E,2450N, Ford, IL

Built 1994 Load: 32.4 t ADT: 75

TR19

Good

Over: STREAM

1300E,2900N., Ford, IL

Built 1995 Load: 32.4 t ADT: 50

TR 2B LYMAN

Good

Over: STREAM

1670 N 1800 E, Ford, IL

Built 1996 Load: 32.4 t ADT: 75

TR 37 BRENTON

Good

Over: N FK VERMILLION RV

1730N, 2300N, Ford, IL

Built 1996 Load: 32.4 t ADT: 10

FAS342/CHATSWORTH

Good

Over: TRIB TO BIG FOUR DCH

1330N, 900E, Ford, IL

Built 1999 Load: 32.4 t ADT: 250

TR 83

Good

Over: WALL TOWN DR DITCH

1570E, 600N, Ford, IL

Built 1997 Load: 32.4 t ADT: 10

TR 64

Good

Over: STREAM

2910N, 1700E, Ford, IL

Built 1997 Load: 32.4 t ADT: 50

TR 88

Good

Over: SUGAR CREEK

450N,2400E, Ford, IL

Built 1998 Load: 32.4 t ADT: 50

TR 39

Good

Over: TRIB TO N FK VERMILL

3 MI SW PIPER CITY, Ford, IL

Built 1998 Load: 32.4 t ADT: 25

TR 58

Good

Over: PELLA DR DITCH

2830N, 1500E, Ford, IL

Built 1998 Load: 32.4 t ADT: 25

TR 57E

Good

Over: THE BIG FOUR

890E, 1500N, Ford, IL

Built 1998 Load: 32.4 t ADT: 50

TR 83

Good

Over: FRD SPEC. DRNAGE DIT

3 MI NW OF PAXTON, Ford, IL

Built 1999 Load: 32.4 t ADT: 10

TR 89 DRUMMER

Good

Over: W. BRANCH DRUMMER CR

260 E, 550 N, Ford, IL

Built 1999 Load: 32.4 t ADT: 200

TR 64A

Good

Over: STREAM

2 MI E OF ROBERTS, Ford, IL

Built 1999 Load: 32.4 t ADT: 25

TR 29

Good

Over: PELLA DRAINAGE DITCH

2.5E,1N OF PIPER CTY, Ford, IL

Built 1999 Load: 32.4 t ADT: 25

TR 91/DIX TWP

Good

Over: DICKERSON SLOUGH

620E,500N (E/GIBC), Ford, IL

Built 2001 Load: 32.4 t ADT: 525

TR 7

Good

Over: STREAM

.75 MI S KEMPTON, Ford, IL

Built 2001 Load: 32.4 t ADT: 25

FAS 1346/CH5/LEHIG

Good

Over: TRIB TO BIG 4 DITCH

1710E,100N, Ford, IL

Built 2001 Load: 32.4 t ADT: 250

TR 31

Good

Over: UNNAMED DITCH

0.34 MI. E LIV CO, Ford, IL

Built 2002 Load: 32.4 t ADT: 200

TR 23

Good

Over: UNNAMED STREAM

2700N, 1490E, Ford, IL

Built 2001 Load: 32.4 t ADT: 10

TR 64 MONA

Good

Over: STREAM

E1700 N3250, Ford, IL

Built 2003 Load: 32.4 t ADT: 10

Showing 16,951-17,000 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.