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 9A (TH-C54)

Good

Over: BRANCH CROW CREEK

T13N-R9E-4PM SEC 1, Marshall, IL

Built 1980 Load: 32.4 t ADT: 100

TR 31 (TH-C59)

Good

Over: CROW CREEK

T13N-R9E-4PM SEC 25, Marshall, IL

Built 1991 Load: 32.4 t ADT: 50

TR 31(TH-C59)

Good

Over: CREEK

6.07 M E STARK CO LN, Marshall, IL

Built 1994 Load: 32.4 t ADT: 50

TR 40

Good

Over: Un-named Creek

Sec 10 T13N R9E 4PM, Marshall, IL

Built 2015 Load: 32.4 t ADT: 25

TR 110 (TH-C59)

Good

Over: SANDY CREEK

T30N-R1W-3PM SEC 4, Marshall, IL

Built 1978 Load: 32.4 t ADT: 25

TR 49

Good

Over: TRIB/SANDY OR JUDD C

1000N, 2394E, Marshall, IL

Built 2003 Load: 32.4 t ADT: 50

TR 140 (TH-S55)

Good

Over: SANDY CREEK

T30N-R1E-3PM SEC 4, Marshall, IL

Built 1980 Load: 32.4 t ADT: 25

TR 37A (TH-C60)

Good

Over: SANDY CREEK

T30N-R1E-3PM SEC 10, Marshall, IL

Built 1982 Load: 32.4 t ADT: 50

TR 39 (TH-C59)

Good

Over: TRIB SANDY CREEK

T30N-R1E-3PM SEC 11, Marshall, IL

Built 1990 Load: 32.4 t ADT: 50

TR 150

Good

Over: STREAM

EVANS SEC 2-3, Marshall, IL

Built 1990 Load: 32.4 t ADT: 25

TR 140C (TH-S55)

Good

Over: S BRANCH CROW CREEK

T29N-R1E-3PM SEC 28, Marshall, IL

Built 1980 Load: 32.4 t ADT: 100

TR 130B (TH-S51)

Good

Over: BRANCH CROW CR

T29N-R1E-3PM SEC 7, Marshall, IL

Built 1987 Load: 32.4 t ADT: 50

TR 140C (TH-S 55)

Good

Over: CREEK

T29N-R1E-3PM SEC 9, Marshall, IL

Built 1991 Load: 32.4 t ADT: 200

TR 149 (TH-D18)

Good

Over: CREEK

T29N-RIE-3PM SEC 31, Marshall, IL

Built 2009 Load: 32.4 t ADT: 50

TR 87A (TH-D10)

Good

Over: Creek

NW Sec 7-T29N-R1E, Marshall, IL

Built 2013 Load: 32.4 t ADT: 150

TR 129

Good

Over: Un-named Trib. Crow

Sec 29 T29N R1W, Marshall, IL

Built 2014 Load: 32.4 t ADT: 25

TR 101A

Good

Over: CREEK

T29N-R1W-3PM-SEC 18, Marshall, IL

Built 2006 Load: 32.4 t ADT: 50

TR 87 A

Good

Over: Trib N Br. Crow Cr

Sec 1 T29N R1W, Marshall, IL

Built 2015 Load: 32.4 t ADT: 50

TR 70 (TH-S28)

Good

Over: STRAWN CREEK

T29N-R2W-3PM SEC 4, Marshall, IL

Built 1990 Load: 32.4 t ADT: 25

TR 82

Good

Over: CROW CREEK TRIB

T29N-R2W-3PM SEC 27, Marshall, IL

Built 2004 Load: 32.4 t ADT: 75

TR 82

Good

Over: CROW CREEK

3 Mi. W. of Ill. 89, Marshall, IL

Built 2016 Load: 32.4 t ADT: 25

TR 93 (TH-D11)

Good

Over: STRAWN CREEK

T29N-R3W-3PM SEC 12, Marshall, IL

Built 1988 Load: 32.4 t ADT: 150

TR 143

Good

Over: PIGEON CREEK

0.48 MI E IL 26, Marshall, IL

Built 2001 Load: 32.4 t ADT: 100

TR 54

Good

Over: CROW CREEK

0.10 MI S TR 143, Marshall, IL

Built 2002 Load: 32.4 t ADT: 50

TR 42 (TH-S-17)

Good

Over: THENIUS CREEK

T12N-R9E-4PM SEC 11, Marshall, IL

Built 1983 Load: 32.4 t ADT: 25

TR 79 (TH-C68)

Good

Over: GIMLET CREEK

T12N-R9E-4PM SEC 15, Marshall, IL

Built 1985 Load: 32.4 t ADT: 50

TR 85

Good

Over: CREEK

T12N-R9E-4PM SEC 30, Marshall, IL

Built 1989 Load: 32.4 t ADT: 50

TR-63

Good

Over: Senachwine Creek

5.0M W. of Sparland, Marshall, IL

Built 2017 Load: 32.4 t ADT: 25

TR 85

Good

Over: DEER CREEK

2.1 MI E OF IL 40, Marshall, IL

Built 1997 Load: 32.4 t ADT: 50

FAS 568 CH3

Good

Over: QUIVER CREEK

.25 M S TOPEKA, Mason, IL

Built 2010 Load: 32.4 t ADT: 125

FAS 1585(CH 21)

Good

Over: Crane Creek

0.46 mi E TR 122, Mason, IL

Built 2015 Load: 32.4 t ADT: 450

FAS 572 CH 5

Good

Over: SAMUALS DITCH

.5 M W EASTON, Mason, IL

Built 2008 Load: 32.4 t ADT: 200

FAS 1595 (CH 19)

Good

Over: SLEEPY HALLOW DITCH

4 M SW MASON CITY, Mason, IL

Built 2012 Load: 32.4 t ADT: 275

FAS 1587 / CH 2

Good

Over: BRANCH OF JORDAN CRK

2.5MI W KILBOURNE, Mason, IL

Built 1995 Load: 32.4 t ADT: 125

FAS 1587 / CH 2

Good

Over: BRANCH OF JORDAN CRK

3.0 SW OF KILBOURNE, Mason, IL

Built 1995 Load: 32.4 t ADT: 125

FAS 1587

Good

Over: BRANCH OF JORDAN CRK

4MI SW OF KILBOURNE, Mason, IL

Built 1995 Load: 32.4 t ADT: 125

COUNTY HIGHWAY 4

Good

Over: HICKORY GROVE DITCH

1.5 MI E OF MANITO, Mason, IL

Built 1998 Load: 32.4 t ADT: 650

COUNTY HIGHWAY 4

Good

Over: MEEKER DITCH

2.5 MI E OF MANITO, Mason, IL

Built 1998 Load: 32.4 t ADT: 750

COUNTY HIGHWAY 4

Good

Over: BREED LOVE DITCH

3.5 MI E OF MANITO, Mason, IL

Built 1998 Load: 32.4 t ADT: 750

TR 39

Good

Over: MASON TAZEWELL DITCH

2 MI SW FOREST CITY, Mason, IL

Built 1987 Load: 32.4 t ADT: 100

TR 47

Good

Over: RED OAK DITCH

4 M SE FORREST CITY, Mason, IL

Built 2007 Load: 32.4 t ADT: 75

TR 59

Good

Over: ALLENS GROVE DITCH

5.5 M NW SAN JOSE, Mason, IL

Built 2007 Load: 32.4 t ADT: 50

TR 59

Good

Over: MAIN DITCH BRANCH

2.75MI NW SAN JOSE, Mason, IL

Built 1991 Load: 32.4 t ADT: 50

TR 266

Good

Over: ALLENS GROVE DITCH

2.5 M W SAN JOSE, Mason, IL

Built 2012 Load: 32.4 t ADT: 25

TR 75

Good

Over: Allens Grove Ditch

2.5 mi SW San Jose, Mason, IL

Built 2013 Load: 32.4 t ADT: 25

TR 10

Good

Over: FISH CREEK

2MI NW CHANDLERVILLE, Mason, IL

Built 1991 Load: 32.4 t ADT: 25

TR 129

Good

Over: CRANE CR

2.5 M SW EASTON, Mason, IL

Built 2008 Load: 32.4 t ADT: 25

TR 171

Good

Over: SLEEPY HOLLOW BRANCH

3.5MI SW MASON CITY, Mason, IL

Built 1989 Load: 32.4 t ADT: 50

TR 178

Good

Over: FURRER DITCH

2.5 MI NE EASTON, Mason, IL

Built 1970 Load: 32.4 t ADT: 75

FAS 1586

Good

Over: DRAINAGE DITCH

4 M NW KILBORNE, Mason, IL

Built 2004 Load: 32.4 t ADT: 225

Showing 19,251-19,300 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.