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 127

Good

Over: WOLF RUN CREEK

2.25M SE WHITEHALL, Greene, IL

Built 2010 Load: 32.4 t ADT: 10

TR 127

Good

Over: SEMINARY CREEK

2.6MI S WHITEHALL, Greene, IL

Built 2010 Load: 32.4 t ADT: 50

TR 251

Good

Over: Taylor Creek

1250N;2225E, Greene, IL

Built 2011 Load: 32.4 t ADT: 25

CH 9

Good

Over: BIRCH CREEK

6.5M E WHITEHALL, Greene, IL

Built 2010 Load: 32.4 t ADT: 150

CH 17

Good

Over: TAR HOLLOW CREEK

1.5 M NE SPANKY, Greene, IL

Built 2011 Load: 32.4 t ADT: 75

TR 217

Good

Over: RUBICON CREEK

2.1M SE GREENFIELD, Greene, IL

Built 2010 Load: 32.4 t ADT: 150

TR 203

Good

Over: Stream

2.8 MI E of Eldred, Greene, IL

Built 2011 Load: 32.4 t ADT: 25

TR 190

Good

Over: WHITAKER CREEK

2.5 E OF BERDAN, Greene, IL

Built 2011 Load: 32.4 t ADT: 50

TR 123

Good

Over: Garrison Hollow

2.5 Mi S of Hillview, Greene, IL

Built 2014 Load: 32.4 t ADT: 25

TR 302

Good

Over: Rubicon Creek

1.8 Mi NE Greenfield, Greene, IL

Built 2015 Load: 32.4 t ADT: 50

TR-17

Good

Over: Little Apple Creek

3.5 Mi NE Athensvill, Greene, IL

Built 2016 Load: 32.4 t ADT: 100

US 6

Good

Over: O'BRIEN RUN

4.09 MI.W.OF ILL 47, Grundy, IL

Built 1974 Load: 32.4 t ADT: 3,950

US 6 (FAP 623)

Good

Over: Rat Run Creek

1.45 MI E OF IL 170, Grundy, IL

Built 2011 Load: 32.4 t ADT: 3,200

TR 3 MINOOKA RD

Good

Over: EAST FK NETTLE CREEK

.09 MI W SCOTT SC RD, Grundy, IL

Built 1984 Load: 32.4 t ADT: 375

TR 4 LA SALLE RD

Good

Over: TRIB TO NETTLE CR

.64 MI N HOGE RD, Grundy, IL

Built 1987 Load: 32.4 t ADT: 50

TR-3B MINOOKA RD

Good

Over: VALLEY RUN

0.13 MI W ILL RT 47, Grundy, IL

Built 2009 Load: 32.4 t ADT: 300

TR 4 LA SALLE ROAD

Good

Over: STANTON CREEK

.81 MI S CH 1, Grundy, IL

Built 1983 Load: 32.4 t ADT: 75

TR 47 LONGPOINT RD

Good

Over: LONG POINTCREEK

.41 MI W US 6, Grundy, IL

Built 1987 Load: 32.4 t ADT: 25

Nettle school Road

Good

Over: O'Brien Run

.27 S.of Stockd Rd., Grundy, IL

Built 2016 Load: 32.4 t ADT: 225

TR 61 SOUTHMOR ROA

Good

Over: BILLS RUN

1.7 M NE SHABBONA RD, Grundy, IL

Built 1984 Load: 32.4 t ADT: 125

VERONA RD TR 74

Good

Over: BILLS RUN

0.31MI N. GREER RD, Grundy, IL

Built 1990 Load: 32.4 t ADT: 325

Greer Rd.

Good

Over: Bills Run

0.44 West Verona, Grundy, IL

Built 2016 Load: 32.4 t ADT: 50

WHITETIE RD TR 77

Good

Over: MAZON RIVER

0.01 MI S OXBOW RD, Grundy, IL

Built 1984 Load: 32.4 t ADT: 250

N. Prairie Dr.

Good

Over: Goose Lake

0.07 E. Lakeside Dr., Grundy, IL

Built 2015 Load: 32.4 t ADT: 125

GORHAM RD TR-80

Good

Over: TR1B TO WAVPECON CR

0.41 MI.S. GREEN CR, Grundy, IL

Built 1989 Load: 32.4 t ADT: 75

DWIGHT RD TR-110

Good

Over: MURRAY SERVICE

.45 MI N.BURKHART RD, Grundy, IL

Built 1990 Load: 32.4 t ADT: 150

TR 147, RANSOM RD

Good

Over: MURRAY SLOUGH

.17M.WE.OF VERONA RD, Grundy, IL

Built 2005 Load: 32.4 t ADT: 50

KINSMAN RD TR-6

Good

Over: JOHNNY RUN

.3 MI S CAHILL RD, Grundy, IL

Built 1979 Load: 32.4 t ADT: 50

TR 1E (LIV ROAD)

Good

Over: TRIB TO JOHNNY RUN

SEE BELOW, Grundy, IL

Built 2003 Load: 32.4 t ADT: 25

TR 56

Good

Over: JOHNNY RUN

0.1 m N GARDNER RD, Grundy, IL

Built 2010 Load: 32.4 t ADT: 25

TR-165 (Scully Roa

Good

Over: Trib W Fk Mazon Rv

0.48mi. W. Verona Rd, Grundy, IL

Built 2016 Load: 32.4 t ADT: 50

TR-155 GOODFARM RD

Good

Over: BREWSTER RUN

.12 MI E OLD MAZ RD, Grundy, IL

Built 1980 Load: 32.4 t ADT: 150

STONEWALL RD TR-15

Good

Over: BREWSTER RUN

0.46 MI E OF ILL 47, Grundy, IL

Built 1978 Load: 32.4 t ADT: 75

STONEWALL RD TR-15

Good

Over: BREWSTER RUN

.10 MI E OLD MAZ RD, Grundy, IL

Built 1979 Load: 32.4 t ADT: 75

TR-165 SCULLY RD

Good

Over: BREWSTER RUN

.13 MI E ILL 47, Grundy, IL

Built 1910 Load: 32.4 t ADT: 10

TR155

Good

Over: BREWSTER RUN

9MI E IL47 ON TR155, Grundy, IL

Built 1995 Load: 32.4 t ADT: 125

TR 131

Good

Over: MURRAY SLUICE

.42 MI W TR 110/DWIG, Grundy, IL

Built 2002 Load: 32.4 t ADT: 50

OLD MAZON RD

Good

Over: BREWSTER RUN

.10 N GOODFARM RD, Grundy, IL

Built 2008 Load: 32.4 t ADT: 50

TR 152 GORMAN ROAD

Good

Over: TRIB E FK MAZON RIV

.7 MI S SCULLY ROAD, Grundy, IL

Built 1984 Load: 32.4 t ADT: 25

OTTAWA AVE

Good

Over: NETTLE CREEK

950 F&S. FREMONT, Grundy, IL

Built 1971 Load: 32.4 t ADT: 2,450

FAS-883

Good

Over: LOST CREEK

0.25 MI E FEAKEYVILL, Hamilton, IL

Built 1972 Load: 32.4 t ADT: 1,000

CH 13

Good

Over: RECTOR CREEK

6 MI W WALPOLE, Hamilton, IL

Built 1995 Load: 32.4 t ADT: 50

CH-15

Good

Over: TEN MILE CREEK

3.25 MI SW MCLEANSBO, Hamilton, IL

Built 1977 Load: 32.4 t ADT: 150

CH-20

Good

Over: TRIB BIG CREEK

2 MI W PIOPOLIS, Hamilton, IL

Built 1978 Load: 32.4 t ADT: 250

CH-19

Good

Over: OPOSSUM CREEK

3.25 MI NW MCLEANSBO, Hamilton, IL

Built 1982 Load: 32.4 t ADT: 100

TR-106

Good

Over: BIG CREEK

2 MI NW DELAFIELD, Hamilton, IL

Built 1981 Load: 32.4 t ADT: 75

TR-89

Good

Over: TRIBUTARY BIG CREEK

SW PIOPOLIS, Hamilton, IL

Built 1982 Load: 32.4 t ADT: 10

TR-290

Good

Over: HOGG CREEK

1.5 MI SW DALE, Hamilton, IL

Built 1982 Load: 32.4 t ADT: 100

CH-15

Good

Over: CONTRARY CREEK

7 MI SW MCLEANSBORO, Hamilton, IL

Built 1983 Load: 32.4 t ADT: 50

TR-76

Good

Over: TRIB HOGG CREEK

6 MI SE MACEDONIA, Hamilton, IL

Built 1991 Load: 32.4 t ADT: 50

Showing 17,301-17,350 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.