State profile · Near national median SD

Illinois bridge safety

Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Illinois — drawn straight from the FHWA National Bridge Inventory.

27,743
Public bridges
41.2%
Good condition
7.9%
Poor condition
7.9%
Structurally deficient

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 rated 0-4

Structurally Deficient

7.9%

2,186 bridges flagged for repair priority

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 — Structurally deficient share 26.3%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Condition Distribution

Bridge inventory deck-condition mix — Illinois (FHWA NBI)

Illinois41.185163825109036%36.47046101719353%7.879465090293047%7.879465090293047%GoodFairPoorStructurally Deficient
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 on the structurally deficient leaderboard (lower share = better)

States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Illinois on the same metric.

44

Rhode Island

7.69% top marginal rate
Structure
Progressive
Burden @ $100K
$78

31

Nebraska

7.73% top marginal rate
Structure
Progressive
Burden @ $100K
$15,571
Selected

17

Illinois

7.88% top marginal rate
Structure
Progressive
Burden @ $100K
$27,743

25

Massachusetts

7.96% top marginal rate
Structure
Progressive
Burden @ $100K
$5,314

29

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 composite NBI rating. Each is inspected at least every 24 months.

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

Structurally Deficient

Over: WILSON CREEK

NE-35-T3NR2E, Fulton, IL

Built 1935 Load: 1.3 t ADT: 10

TR 10-B

Structurally Deficient

Over: KING CREEK

W EDGE OF MINERAL, Bureau, IL

Built 1899 Load: 1.6 t ADT: 10

TR-6

Structurally Deficient

Over: DRAINAGE DITCH

3.5 MI NE DIETERICH, Effingham, IL

Built 1909 Load: 1.6 t ADT: 25

TR208K(TWIN BRIDGE

Structurally Deficient

Over: BIG CREEK

NE EDGE MT ZION, Macon, IL

Built 1967 Load: 1.9 t ADT: 375

All Bridges in Illinois

BLISS ROAD

Good

Over: BLACKBERRY CREEK

1.0 MI N SUGAR GROVE, Kane, IL

Built 2017 Load: 51.2 t ADT: 7,100

IL 167

Good

Over: Trib to Cadwell Cr

0.55 mi w of IL 180, Knox, IL

Built 2019 Load: 51.2 t ADT: 600

CH 53 E

Good

Over: TRIB TO LAKE FORK

2 M E BROADWELL, Logan, IL

Built 2010 Load: 51.2 t ADT: 300

IL 173

Good

Over: PISCASAW CREEK

2 M E OF CNTY LINE, McHenry, IL

Built 2007 Load: 51.2 t ADT: 4,550

ILL 71

Good

Over: COFFEE CREEK

5.14 MI W OF ILL 89, Putnam, IL

Built 1977 Load: 51.2 t ADT: 3,600

RALEIGH RD

Good

Over: ELDORADO RES'R SPWAY

1.25 MI E RALEIGH, Saline, IL

Built 2009 Load: 51.2 t ADT: 2,250

IL 34-FAP 869

Good

Over: MIDDLE FORK SALINE R

1.7 MI E FRANKLIN CO, Saline, IL

Built 2002 Load: 51.2 t ADT: 2,100

ILL 106

Good

Over: TRIB LITTLE SANDY CR

1.5 MI S ALSEY, Scott, IL

Built 2001 Load: 51.2 t ADT: 1,150

DRAPER STREET

Good

Over: SPRING CREEK

0.1 M N OF US 6, Will, IL

Built 1998 Load: 51.2 t ADT: 3,700

IL 125

Good

Over: TRIB TO LOST CREEK

3.5 M E BLUFFS RD, Cass, IL

Built 2009 Load: 51.5 t ADT: 3,500

ASHLAND AVE

Good

Over: LITTLE CAL RIVER

0.01 M N Thornton Rd, Cook, IL

Built 1930 Load: 51.5 t ADT: 9,900

FAU 8324

Good

Over: STREAM

ROBINSON, Crawford, IL

Built 2001 Load: 51.5 t ADT: 4,150

INTERSTATE 57 SB

Good

Over: UP RR

S OF SCL WEST CITY, Franklin, IL

Built 2013 Load: 51.5 t ADT: 18,600

INTERSTATE 57 NB

Good

Over: UP RR

S OF SCL WEST CITY, Franklin, IL

Built 2013 Load: 51.5 t ADT: 18,600

IL 49 FAP 840

Good

Over: PIDGEON CREEK

16.12 MI S OF US 24, Iroquois, IL

Built 2008 Load: 51.5 t ADT: 2,100

IL 25

Good

Over: NORTON CREEK

2.2 M N OF IL 64, Kane, IL

Built 1967 Load: 51.5 t ADT: 9,600

US 150

Good

Over: BNSF RR(063001F)

3 M SE GALESBURG, Knox, IL

Built 2018 Load: 51.5 t ADT: 3,850

IL 60

Good

Over: SQUAW CREEK

AT NW OF PETERSON RD, Lake, IL

Built 1978 Load: 51.5 t ADT: 9,800

CH 11

Good

Over: Trib to Raccoon Crk

6 Mi SW Bridgeport, Lawrence, IL

Built 2021 Load: 51.5 t ADT: 25

TR 4A

Good

Over: DIAMOND CREEK

2285 N, 100 E, Livingston, IL

Built 2009 Load: 51.5 t ADT: 25

TR 30A(STRAWN RD)

Good

Over: WILLOW BRANCH

3.25 MI NE NIANTIC, Macon, IL

Built 2021 Load: 51.5 t ADT: 50

FAU 7374 (CENTER S

Good

Over: STEVENS CREEK

1.5 MI W OF FAU 7429, Macon, IL

Built 2021 Load: 51.5 t ADT: 550

TR 123

Good

Over: Trib to Silver Ck

2 Mi N. Alhambra, Madison, IL

Built 2022 Load: 51.5 t ADT: 75

I-90 WB

Good

Over: COON CREEK

0.5 MI E ANTHONY RD, McHenry, IL

Built 2013 Load: 51.5 t ADT: 28,500

I-90 EB

Good

Over: COON CREEK

0.5 MI E/ ANTHONY RD, McHenry, IL

Built 2013 Load: 51.5 t ADT: 28,500

US ROUTE 150

Good

Over: COAL CREEK

1.4 MI SE JCT US 6, Rock Island, IL

Built 2005 Load: 51.5 t ADT: 9,250

ILL 145-FH 12

Good

Over: TRIB-BATTLEFORD CR

0.6 MI N OF POPE CO, Saline, IL

Built 1948 Load: 51.5 t ADT: 1,600

IL 4

Good

Over: LITTLE MUD CREEK

0.3 M SOUTH IL 15, St. Clair, IL

Built 1994 Load: 51.5 t ADT: 2,400

IL 4

Good

Over: LITTLE MUD CREEK

.8 M N JCT DRMSDT RD, St. Clair, IL

Built 2012 Load: 51.5 t ADT: 2,400

ORANGEVILLE RD.

Good

Over: RICHLAND CREEK

ORANGEVILLE, Stephenson, IL

Built 1959 Load: 51.5 t ADT: 1,450

FAP 821 (IL 15)

Good

Over: DRY FORK

1.75 MI E SIMS RD, Wayne, IL

Built 2017 Load: 51.5 t ADT: 3,250

IL 172

Good

Over: BRANCH DITCH

2 MI. N. OF TAMPICO, Whiteside, IL

Built 1994 Load: 51.5 t ADT: 950

TR 4C

Good

Over: BURKETT HOLLOW

3 MI W GERMANTOWN, Woodford, IL

Built 1983 Load: 51.5 t ADT: 500

A-3 ROAD

Good

Over: PIGEON CREEK

0.5 MI NW OF HDQRTRS, Williamson, IL

Built 1990 Load: 51.7 t ADT: 400

FAP 322 (US 51)

Good

Over: Ditch

0.9 mi N IL 16, Christian, IL

Built 2019 Load: 51.8 t ADT: 3,600

ILL 161

Good

Over: SUGAR CREEK

4 M E NEW BADEN, Clinton, IL

Built 2010 Load: 51.8 t ADT: 4,500

IL 47 FAP 326

Good

Over: SARATOGA CREEK

0.38 MI N/NELSON RD, Grundy, IL

Built 2016 Load: 51.8 t ADT: 6,900

ILL RT 92

Good

Over: PENNY SLOUGH

1.0 MI W JCT ILL 82, Henry, IL

Built 1934 Load: 51.8 t ADT: 2,200

STEARNS RD WB

Good

Over: N ARM BREWSTER CRK

0.3 MI W OF IL 25, Kane, IL

Built 2010 Load: 51.8 t ADT: 15,400

FAS2258, CH21

Good

Over: FOX RIVER

E 2153,N 3440, LaSalle, IL

Built 1960 Load: 51.8 t ADT: 800

BUCHTA ROAD/TR 153

Good

Over: TRIB TO INDIAN CREEK

4.0 M NW EDWARDSVLL, Madison, IL

Built 1984 Load: 51.8 t ADT: 1,300

CHARLES RD

Good

Over: SILVER CR

0.6 M NW OF ILL 47, McHenry, IL

Built 1978 Load: 51.8 t ADT: 6,500

FEAZEL RD

Good

Over: PANKEY BRANCH

@ US 45 INTERSECTION, Saline, IL

Built 2021 Load: 51.8 t ADT: 750

LEWIS RD

Good

Over: BRUSHY CREEK

2 MI NW HARRISBUG, Saline, IL

Built 2017 Load: 51.8 t ADT: 25

TR 112B

Good

Over: STREAM

5.4 MI SE TOWER HILL, Shelby, IL

Built 2013 Load: 51.8 t ADT: 75

CH 32(FAS 1507)

Good

Over: HUNGRY HOLLOW CREEK

3 MI NW DANVILLE, Vermilion, IL

Built 1968 Load: 51.8 t ADT: 675

TR 243

Good

Over: Locust Creek

4 Mi S of Nashville, Washington, IL

Built 2021 Load: 51.8 t ADT: 225

IL 1

Good

Over: LICK CREEK

3 MI S BROWNSVILLE, White, IL

Built 2021 Load: 51.8 t ADT: 3,250

US 20 W B

Good

Over: E CHANNEL ROCK RIV

.7 MI E OF ILL 2, Winnebago, IL

Built 2015 Load: 51.8 t ADT: 32,000

PERRYVILLE RD

Good

Over: UNNAMED CREEK

0.03MI N OF IL 173, Winnebago, IL

Built 2004 Load: 51.8 t ADT: 7,800

Showing 24,851-24,900 of 27,743 bridges

Related

All states → | National rankings → | Understanding conditions → | SD bridges explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.

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). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.

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.