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 97

Good

Over: TRIB TO EDWARDS RIV

SW1/4-32-T15NR2W, Mercer, IL

Built 2002 Load: 32.4 t ADT: 25

TR 208

Good

Over: CAMP CREEK

SE1/4NE1/4-20-T15NR2, Mercer, IL

Built 2006 Load: 32.4 t ADT: 25

TR 176

Good

Over: CAMP CREEK

SW-23-T15NR3W, Mercer, IL

Built 1980 Load: 32.4 t ADT: 25

TR 40

Good

Over: ELIZA CREEK

NE-22-T15NR5W, Mercer, IL

Built 1988 Load: 32.4 t ADT: 25

TR 58

Good

Over: ELIZA CREEK

W.CTR-23-T15NR5W, Mercer, IL

Built 1982 Load: 32.4 t ADT: 25

TR 59

Good

Over: MAIN DITCH

S.CTR-23-T15NR6W, Mercer, IL

Built 1986 Load: 32.4 t ADT: 75

TR 40

Good

Over: WINTER'S CREEK

SE-34-T15NR5W, Mercer, IL

Built 1991 Load: 32.4 t ADT: 25

TR 3

Good

Over: MAIN DITCH NORTH

SW-1-T15NR6W, Mercer, IL

Built 2001 Load: 32.4 t ADT: 75

TR 8

Good

Over: MAIN DITCH NORTH

SW-24-T15NR6W, Mercer, IL

Built 2007 Load: 32.4 t ADT: 10

TR 228

Good

Over: N. POPE CREEK

Sec 24,T14N,R2W, Mercer, IL

Built 2020 Load: 32.4 t ADT: 25

FAS 214

Good

Over: SNAKE CREEK

SW COR-24-T13NR4W, Mercer, IL

Built 1990 Load: 32.4 t ADT: 50

CH 12

Good

Over: DUCK CREEK

0.3M E VALMEYERSEC10, Monroe, IL

Built 1982 Load: 32.4 t ADT: 775

GHENT RD/FAU 9310

Good

Over: PALMER CREEK

COLUMBIA, Monroe, IL

Built 1991 Load: 32.4 t ADT: 1,550

PALMER RD/MSS 1002

Good

Over: PALMER CREEK

COLUMBIA, Monroe, IL

Built 1992 Load: 32.4 t ADT: 4,800

OLD IL 3 (GHENT RD

Good

Over: HILL LAKE CREEK

2.3 MI S OF DUPO, Monroe, IL

Built 2008 Load: 32.4 t ADT: 3,000

I-255 & Ramps E &

Good

Over: Hill Creek

2.1 mi E of JB Brdge, Monroe, IL

Built 1982 Load: 32.4 t ADT: 12,500

TR 28

Good

Over: FOUNTAIN CREEK

3.5 MI NE VALMEYER, Monroe, IL

Built 1978 Load: 32.4 t ADT: 175

TR32 IVY RD

Good

Over: DRAINAGE DITCH

SEC.28 RD.DISTRICT 8, Monroe, IL

Built 1978 Load: 32.4 t ADT: 50

TR 127 MM ROAD

Good

Over: HORSE CREEK

5.5 MI NE RENAULT, Monroe, IL

Built 1979 Load: 32.4 t ADT: 325

LL ROAD/TR121

Good

Over: RICHLAND CREEK

5 MI. SE OF HECKER, Monroe, IL

Built 1981 Load: 32.4 t ADT: 250

FAS 1857

Good

Over: MAEYSTOWN CREEK

1.5 M SW O MAEYSTOWN, Monroe, IL

Built 1980 Load: 32.4 t ADT: 325

J-ROAD TR-102

Good

Over: ROCKHOUSE CREEK

ROAD DIST.NO. 3, Monroe, IL

Built 1982 Load: 32.4 t ADT: 375

TR 22

Good

Over: FOUNTAIN CREEK

ROAD DIST.9 SEC.28, Monroe, IL

Built 1983 Load: 32.4 t ADT: 75

FAS 1857/CH 6

Good

Over: LITTLE CARR CREEK

1.5M S OF COLUMBIA, Monroe, IL

Built 1984 Load: 32.4 t ADT: 3,600

TR 23

Good

Over: LITTLE CARR CREEK

RD DIST 5, Monroe, IL

Built 1984 Load: 32.4 t ADT: 250

TR 20

Good

Over: VALMEYER DRAINAGE DT

ROAD DIST 10, Monroe, IL

Built 1983 Load: 32.4 t ADT: 50

KASKAKIA RD. TR149

Good

Over: FULTS DRAINAGE DITCH

ROAD DIST NO 8, Monroe, IL

Built 1983 Load: 32.4 t ADT: 100

KK RDTR105

Good

Over: HARRISON-VILLE DRDIS

SEC34 RD DIST10, Monroe, IL

Built 1985 Load: 32.4 t ADT: 25

TR 52 D RD

Good

Over: BOND CR

ROAD DIST NO 9, Monroe, IL

Built 1986 Load: 32.4 t ADT: 200

FAS 1857

Good

Over: TRIB TO FULTS CREEK

SEC 36 CH.3, Monroe, IL

Built 1987 Load: 32.4 t ADT: 200

TR 47

Good

Over: BOND CREEK

4.5 MI NW WATERLOO, Monroe, IL

Built 1991 Load: 32.4 t ADT: 475

TR 66A GILMORE LK

Good

Over: TRIB PRAIRE DU LONG

SECT.5 ROAD DIST. 2, Monroe, IL

Built 1989 Load: 32.4 t ADT: 275

TR 142 OBST RD.

Good

Over: BLACK CREEK TRIB

6 MI. SE HECKER, Monroe, IL

Built 1989 Load: 32.4 t ADT: 150

TR 32

Good

Over: MAEYSTOWN CK

1MI SW CHALFIN BR., Monroe, IL

Built 1990 Load: 32.4 t ADT: 10

TR 82

Good

Over: KOPP CREEK

3 MI.E WATERLOO, Monroe, IL

Built 1991 Load: 32.4 t ADT: 75

TR 134

Good

Over: ROCKY BRANCH TRIB

7.5 MI SE WATERLOO, Monroe, IL

Built 1991 Load: 32.4 t ADT: 100

TR 91 KK ROAD

Good

Over: FOUNTAIN CREEK TRIB

3.5M SE OF WATERLOO, Monroe, IL

Built 1994 Load: 32.4 t ADT: 250

TR 95 HARRIS RD

Good

Over: HARRISONVILLE DITCH

ROAD DISTRICT 10, Monroe, IL

Built 1994 Load: 32.4 t ADT: 10

TR 115/LL ROAD

Good

Over: BRADLEY BRANCH

7MI SE OF WATERLOO, Monroe, IL

Built 1995 Load: 32.4 t ADT: 150

TR 140

Good

Over: BLACK CREEK TRIB

1MI N OF RED BUD, Monroe, IL

Built 1995 Load: 32.4 t ADT: 200

TR 71 KONARCIK RD

Good

Over: WALTERS CREEK

1.5 MI. E. WATERLOOO, Monroe, IL

Built 1996 Load: 32.4 t ADT: 200

TR 69/TROUT CAMP R

Good

Over: BOND CREEK

2 MI NE VALMEYER, Monroe, IL

Built 1996 Load: 32.4 t ADT: 250

TR 66 GILMORE LKE

Good

Over: PRAIRIE DU LONG CRK

2.5MI NE OF WATERLOO, Monroe, IL

Built 1997 Load: 32.4 t ADT: 275

TR 147 FAUST ROAD

Good

Over: DRY FORK CREEK

3MI NE OF RENAULT, Monroe, IL

Built 1998 Load: 32.4 t ADT: 125

GILMORE LAKE RDTR5

Good

Over: GERHARDT CREEK

RD DIST #2, Monroe, IL

Built 2006 Load: 32.4 t ADT: 375

TR 107 KK ROAD

Good

Over: RYAN CREEK

3 MI. SE VALMEYER, Monroe, IL

Built 1996 Load: 32.4 t ADT: 175

FAS 1857

Good

Over: TRIB TO MOREDOCK LK

VALMEYER, Monroe, IL

Built 1996 Load: 32.4 t ADT: 75

TR 38 STRINGTOWN R

Good

Over: MORRISON HOLLOW CRK

1.5MI SW OF FULTS, Monroe, IL

Built 1998 Load: 32.4 t ADT: 75

TR 165 VV ROAD

Good

Over: PAINT CREEK

.5MI EAST OF AMES, Monroe, IL

Built 2001 Load: 32.4 t ADT: 100

FAS 855

Good

Over: MAEYSTOWN CK. TRIB

.5MI N MAEYSTOWN, Monroe, IL

Built 2003 Load: 32.4 t ADT: 350

Showing 19,651-19,700 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.