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

TR-195A

Good

Over: Hickory Creek

1595E, 1100N, Livingston, IL

Built 1991 Load: 41.1 t ADT: 50

TR 70

Good

Over: MUD CREEK

2705 N, 1000 E, Livingston, IL

Built 2022 Load: 41.1 t ADT: 100

US 51 (FAP 322)

Good

Over: WEBSTER CREEK

.8 MI N JEFFERSN C L, Marion, IL

Built 1960 Load: 41.1 t ADT: 7,200

TR 456A

Good

Over: SUGAR CREEK

CTR-1-T4NR1W, McDonough, IL

Built 1998 Load: 41.1 t ADT: 25

FAP 71

Good

Over: STREAM

SW OF BELLFLOWER, McLean, IL

Built 2010 Load: 41.1 t ADT: 900

TR 221 A

Good

Over: STREAM

2.5 MI S ANCHOR, McLean, IL

Built 2022 Load: 41.1 t ADT: 25

FAS 355/CH 29

Good

Over: BUCK CREEK

0.5 MI S GRIDLEY, McLean, IL

Built 2009 Load: 41.1 t ADT: 850

TR 8

Good

Over: UNNAMED TRIBUTARY

2.4 M. SE Dalton Cit, Moultrie, IL

Built 2019 Load: 41.1 t ADT: 20

TR 69

Good

Over: Jonathan Creek

1 Mi. S Cadwell, Moultrie, IL

Built 2020 Load: 41.1 t ADT: 125

LOWELL PARK ROAD

Good

Over: BR. PINE CREEK

3.5 MI SW MT. MORRIS, Ogle, IL

Built 1995 Load: 41.1 t ADT: 850

TR 195

Good

Over: STREAM

4. MI SE CERRO GORDO, Piatt, IL

Built 1963 Load: 41.1 t ADT: 25

TR 105

Good

Over: WOLF RUN

2.0 MI E CISCO, Piatt, IL

Built 2019 Load: 41.1 t ADT: 50

I-72 N FR RD/TR 32

Good

Over: THE SNY SLOUGH

2M SW I-172, Pike, IL

Built 1998 Load: 41.1 t ADT: 50

TR 492

Good

Over: Little Blue Creek

1.2MI S FLORENCE, Pike, IL

Built 1916 Load: 41.1 t ADT: 50

TR 95A

Good

Over: SOW CREEK

1.0M E OF PULASKI, Pulaski, IL

Built 1983 Load: 41.1 t ADT: 150

MOLINE RD

Good

Over: ZUMA CREEK

0.4 MI. N. IL 92, Rock Island, IL

Built 2000 Load: 41.1 t ADT: 775

ILL 159

Good

Over: RICHLAND CREEK

IN BELLEVILLE, St. Clair, IL

Built 1923 Load: 41.1 t ADT: 11,400

IL 161

Good

Over: Schoenberger Creek

300' NW DUTCH HOLLOW, St. Clair, IL

Built 1993 Load: 41.1 t ADT: 15,100

IL 159

Good

Over: Br of Canteen Creek

500' s of madison co, St. Clair, IL

Built 2012 Load: 41.1 t ADT: 16,100

IL 26

Good

Over: DRAINAGE DITCH

2 MI. N. OF FREEPORT, Stephenson, IL

Built 1995 Load: 41.1 t ADT: 9,100

MILLER ROAD

Good

Over: MILL CREEK TRIB

1.3 MI N MILL CREEK, Union, IL

Built 2022 Load: 41.1 t ADT: 10

TR 261

Good

Over: Feather Creek

1 mile N Muncie, Vermilion, IL

Built 2018 Load: 41.1 t ADT: 125

TR 54

Good

Over: BAUM BRANCH

3 M SW JAMAICA, Vermilion, IL

Built 2019 Load: 41.1 t ADT: 50

TR 25

Good

Over: BR COON CR

3 MI NE NEW MINDEN, Washington, IL

Built 1950 Load: 41.1 t ADT: 25

FAP 328 - US 45

Good

Over: RACCOON CREEK

0.5 MI S CLAY CO LIN, Wayne, IL

Built 2008 Load: 41.1 t ADT: 2,250

AVENUE G

Good

Over: UP RR

STERLING, Whiteside, IL

Built 1963 Load: 41.1 t ADT: 7,700

FAS 1887-CH 12

Good

Over: SUGAR CREEK

7 MI S CRAB ORCHARD, Williamson, IL

Built 1995 Load: 41.1 t ADT: 500

PERRYVILLE RD

Good

Over: KEITH CREEK

.2 MI N SPRING CR RD, Winnebago, IL

Built 1991 Load: 41.1 t ADT: 22,800

TR 97

Good

Over: TRIB BLUE CREEK

.15 MI W TR 4, Woodford, IL

Built 2003 Load: 41.1 t ADT: 300

FAS 584

Good

Over: LOGAN CREEK

5.0 MI E OF MT STERL, Brown, IL

Built 1981 Load: 41.5 t ADT: 200

US 6

Good

Over: SPRING CR& ABANDN RR

E EDGE SPRING VALLEY, Bureau, IL

Built 1994 Load: 41.5 t ADT: 10,050

JEFFERSON STREET

Good

Over: ROCKY RUN CREEK

W CENTER OF TISKILWA, Bureau, IL

Built 2021 Load: 41.5 t ADT: 125

ARGO FAY ROAD

Good

Over: STREAM

1 MI SW OF ARGO FAY, Carroll, IL

Built 1984 Load: 41.5 t ADT: 1,600

FAI-74

Good

Over: DITCH

1.5 MI E of Urbana, Champaign, IL

Built 2018 Load: 41.5 t ADT: 28,300

TR 113 B

Good

Over: SALINE BR DRAIN DIT

2.0 MI SE THOMASBORO, Champaign, IL

Built 2008 Load: 41.5 t ADT: 50

OLD ILL 29

Good

Over: FLAT BRANCH CREEK

1.1MI E JCT IL48/29, Christian, IL

Built 1989 Load: 41.5 t ADT: 3,400

MT AUBURN RD

Good

Over: CLEAR CREEK

5M N IL29,TAYLORVILL, Christian, IL

Built 1991 Load: 41.5 t ADT: 850

IL 29

Good

Over: DITCH

1.1 S CH23 EDINBURG, Christian, IL

Built 2012 Load: 41.5 t ADT: 8,100

I-90 WB Jayne Adam

Good

Over: U.P. RR Spur

2.3 Mi E. Ill Rte 83, Cook, IL

Built 2015 Load: 41.5 t ADT: 160,700

I-90 EB Jayne Adam

Good

Over: WCL RR

0.1 Mi E. US 45, Cook, IL

Built 2015 Load: 41.5 t ADT: 172,200

I-90 EB

Good

Over: U.P. RR Spur

2.3 Mi E. Ill Rte 83, Cook, IL

Built 2015 Load: 41.5 t ADT: 160,700

I-294,80 EB

Good

Over: MAT SERV QUARRY

2M W I94 P24, Cook, IL

Built 1958 Load: 41.5 t ADT: 73,500

I-294,80 WB

Good

Over: MAT SERV QUARRY

2M W I94 P24, Cook, IL

Built 1958 Load: 41.5 t ADT: 73,500

FAP 68 - IL 23

Good

Over: DRAINAGE DITCH

0.6 MI N. OF US 30, DeKalb, IL

Built 1991 Load: 41.5 t ADT: 3,150

HORTENSE ST

Good

Over: BULL RUN

3150N 490E, DeKalb, IL

Built 1969 Load: 41.5 t ADT: 400

FAU 8390

Good

Over: LITTLE WABASH RIVER

0.5 MI NW EFFINGHAM, Effingham, IL

Built 2000 Load: 41.5 t ADT: 2,450

ILL 14

Good

Over: ANDY CREEK

0.21M W OF BUCKNER, Franklin, IL

Built 2008 Load: 41.5 t ADT: 4,950

IL 14

Good

Over: UNNAMED STREAM

2.4 MI W HAMILTON CO, Franklin, IL

Built 2022 Load: 41.5 t ADT: 1,650

ASHLEY RD/FAU 5974

Good

Over: DRAINAGE DITCH

.14 MI S OF US 6, Grundy, IL

Built 1988 Load: 41.5 t ADT: 2,700

FAP-776 (ILL-242)

Good

Over: BIG CREEK

6.5 MI S WAYNE CO LN, Hamilton, IL

Built 1996 Load: 41.5 t ADT: 1,250

Showing 23,651-23,700 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.