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-298

Good

Over: AUXIER CREEK DRAIN

2.5 MI NE BELLE PRAI, Hamilton, IL

Built 1982 Load: 32.4 t ADT: 50

FAS-2870

Good

Over: MIDDLE FORK CREEK

8 MI W WALPOLE, Hamilton, IL

Built 1983 Load: 32.4 t ADT: 100

TR-108

Good

Over: SHELTON CREEK

4 MI NE DAHLGREN, Hamilton, IL

Built 1984 Load: 32.4 t ADT: 50

TR-198

Good

Over: HOGG CREEK

4.5 MI SW DALE, Hamilton, IL

Built 1985 Load: 32.4 t ADT: 50

TR-248

Good

Over: TEN MILE CREEK

2 MI S MCLEANSBORO, Hamilton, IL

Built 1994 Load: 32.4 t ADT: 100

TR-318

Good

Over: HOGG CREEK

1.5 MI SW DALE, Hamilton, IL

Built 1982 Load: 32.4 t ADT: 10

TR-234

Good

Over: TRIB BIG CREEK

0.5 MI N PIOPOLIS, Hamilton, IL

Built 1984 Load: 32.4 t ADT: 50

TR-296

Good

Over: TRIB BIG CREEK

2.3 MI NE PIOPOLIS, Hamilton, IL

Built 1985 Load: 32.4 t ADT: 10

TR-421

Good

Over: DRAINAGE DITCH CREEK

2 MI N BROUGHTON, Hamilton, IL

Built 1985 Load: 32.4 t ADT: 25

TR-191

Good

Over: SULLIVAN BRANCH

3.5 NE MACEDONIA, Hamilton, IL

Built 1984 Load: 32.4 t ADT: 50

TR-482

Good

Over: TRIB LOST BRANCH

3 MI N DOLAN LAKE, Hamilton, IL

Built 1983 Load: 32.4 t ADT: 10

CH-9

Good

Over: BIG CREEK

0.75 MI N DELAFIELD, Hamilton, IL

Built 1986 Load: 32.4 t ADT: 700

TR-438

Good

Over: LICK CREEK

1.25 MI SW DOLAN LK, Hamilton, IL

Built 1986 Load: 32.4 t ADT: 25

TR-205

Good

Over: TRIB BEAR CREEK

W EDGE MCLEANSBORO, Hamilton, IL

Built 1983 Load: 32.4 t ADT: 550

TR-90

Good

Over: HOGG CREEK

8 MI WSW DALE, Hamilton, IL

Built 1987 Load: 32.4 t ADT: 10

TR-99

Good

Over: TRIB BIG CREEK

2 MI NE DELAFIELD, Hamilton, IL

Built 1987 Load: 32.4 t ADT: 75

TR-57

Good

Over: SHELTON CREEK

1 MI NE DAHLGREN, Hamilton, IL

Built 1987 Load: 32.4 t ADT: 75

TR-448

Good

Over: LOST CREEK

0.5 MI S FEAKEYVILLE, Hamilton, IL

Built 1987 Load: 32.4 t ADT: 25

TR-248

Good

Over: BEAR CREEK

0.3 MI S MCLEANSBORO, Hamilton, IL

Built 1985 Load: 32.4 t ADT: 550

TR-238

Good

Over: HOGG CREEK

3.25 MI SW DALE, Hamilton, IL

Built 1988 Load: 32.4 t ADT: 25

TR 482

Good

Over: TRIB LOST CREEK DRAI

2 MI N DOLAN LAKE, Hamilton, IL

Built 1990 Load: 32.4 t ADT: 10

FAS-882 (CH-10)

Good

Over: RADAR'S BRANCH

0.25 MI NE BUNGAY, Hamilton, IL

Built 1987 Load: 32.4 t ADT: 1,200

FAS-2878 (CH-6)

Good

Over: TEN MILE CREEK

3 MI SW MCLEANSBORO, Hamilton, IL

Built 1989 Load: 32.4 t ADT: 750

FAS-873

Good

Over: GREASY CREEK

7 MI W DALE, Hamilton, IL

Built 1991 Load: 32.4 t ADT: 225

TR-178

Good

Over: AUXIER CREEK

3 MI NW BELLE PRAIRI, Hamilton, IL

Built 1989 Load: 32.4 t ADT: 25

CH-1

Good

Over: BEVER CREEK

1.5 MI S BUNGAY, Hamilton, IL

Built 1989 Load: 32.4 t ADT: 175

FAS-881 (CH-11)

Good

Over: N FK SALINE RIVER

2 MI E BROUGHTON, Hamilton, IL

Built 1989 Load: 32.4 t ADT: 100

TR-1

Good

Over: N FORK SALINE RIVER

3 MI W CORNERVILLE, Hamilton, IL

Built 1997 Load: 32.4 t ADT: 100

TR-1 (SALINE CO)

Good

Over: MIDDLE FORK CREEK

3.75 MI W CORNERVILL, Hamilton, IL

Built 1989 Load: 32.4 t ADT: 100

CH-19

Good

Over: TRIB BIG CREEK

3.5 MI N MCLEANSBORO, Hamilton, IL

Built 1991 Load: 32.4 t ADT: 200

TR-312

Good

Over: TEN MILE CREEK

3 MI SE MCLEANSBORO, Hamilton, IL

Built 1990 Load: 32.4 t ADT: 25

TR-470

Good

Over: CREEK

3.5 MI S BUNGAY, Hamilton, IL

Built 1994 Load: 32.4 t ADT: 10

TR-349

Good

Over: NORTH FORK

2.2 MI NE DALE, Hamilton, IL

Built 1991 Load: 32.4 t ADT: 25

TR-95

Good

Over: MIDDLE CREEK

1 MI SW DEALFIELD, Hamilton, IL

Built 1993 Load: 32.4 t ADT: 75

TR-141

Good

Over: OPPOSUM CREEK

1.65 MI SE DELAFIELD, Hamilton, IL

Built 1992 Load: 32.4 t ADT: 75

FAS-2878

Good

Over: CONTRARY CREEK

6 MI SW MCLEANSBORO, Hamilton, IL

Built 1993 Load: 32.4 t ADT: 250

TR-236

Good

Over: SHELTON CREEK DRAIN

0.75 MI N BELLE PRAI, Hamilton, IL

Built 1993 Load: 32.4 t ADT: 50

TR-382

Good

Over: POND CREEK DRAIN

1.5 MI N BROUGHTON, Hamilton, IL

Built 1993 Load: 32.4 t ADT: 25

CH-19

Good

Over: TRIB OPPOSUM CREEK

3.25 MI NW MCLEANSBO, Hamilton, IL

Built 1994 Load: 32.4 t ADT: 100

TR-297A

Good

Over: TRIB BIG MUDDY

2 MI SE MACEDONIA, Hamilton, IL

Built 1995 Load: 32.4 t ADT: 25

TR-184

Good

Over: CONTRARY CREEK

5 MI SW MCLEANSBORO, Hamilton, IL

Built 1996 Load: 32.4 t ADT: 25

TR-349

Good

Over: WHEELER CREEK

3 MI NE DALE, Hamilton, IL

Built 2004 Load: 32.4 t ADT: 25

TR 199

Good

Over: WHEELER CREEK

3 MI NE MCLEANSBORO, Hamilton, IL

Built 1995 Load: 32.4 t ADT: 25

CH 2

Good

Over: TRIB YOUNG BRANCH

3.75 MI E BROUGHTON, Hamilton, IL

Built 1998 Load: 32.4 t ADT: 25

TR 121

Good

Over: FERGUSON CREEK

1.5 MI SW BLAIRSVILL, Hamilton, IL

Built 1997 Load: 32.4 t ADT: 75

TR 296A

Good

Over: TRIB BIG CRK

3.2 MI NE MCLEANSBOR, Hamilton, IL

Built 1997 Load: 32.4 t ADT: 25

TR 114

Good

Over: HOGG CREEK

7.5 MI SW DALE, Hamilton, IL

Built 1998 Load: 32.4 t ADT: 10

FAS 879

Good

Over: HOGG CREEK

6 MI SW DALE, Hamilton, IL

Built 1997 Load: 32.4 t ADT: 175

TR 237

Good

Over: BEAR CREEK

1.5 MI S MCLEANSBORO, Hamilton, IL

Built 1998 Load: 32.4 t ADT: 100

TR 45

Good

Over: ROCKY BRANCH

2.25 MI NW DALGREN, Hamilton, IL

Built 1999 Load: 32.4 t ADT: 75

Showing 17,351-17,400 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.