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 363

Good

Over: LITTLE APPLE CRK

1.5MI SW NORTONVILLE, Morgan, IL

Built 1997 Load: 36.6 t ADT: 50

TR 322

Good

Over: N FK MAUV TRIB

3.5 M NW ALEXANDER, Morgan, IL

Built 2009 Load: 36.6 t ADT: 50

TR-170

Good

Over: Whitley Creek

2.7 MI N OF GAYS, Moultrie, IL

Built 2017 Load: 36.6 t ADT: 75

IL 38

Good

Over: DRAINAGE DITCH

0.5 MI E OF ROCHELLE, Ogle, IL

Built 1996 Load: 36.6 t ADT: 7,050

CH-25R (FAS-1386)

Good

Over: E Br. Copperas Cr

3 Mi N. of US 24, Peoria, IL

Built 2016 Load: 36.6 t ADT: 275

FAP 756 (BRIDGE ST

Good

Over: SANGAMON RIVER

W EDGE OF MONTICELLO, Piatt, IL

Built 1950 Load: 36.6 t ADT: 5,150

TR 20

Good

Over: TRIB TO MILL CREEK

0.4 MI S OF FAS 941, Pulaski, IL

Built 1989 Load: 36.6 t ADT: 225

FAS 859

Good

Over: WELGE CREEK

OVER WELGE CREEK, Randolph, IL

Built 1995 Load: 36.6 t ADT: 1,800

CH 18

Good

Over: TRIB OF PLUM CRK

4 MI N OF SPARTA, Randolph, IL

Built 1988 Load: 36.6 t ADT: 575

AIRPORT ROAD

Good

Over: DRAINAGE DITCH

0.25 MI E. OF I-280, Rock Island, IL

Built 2005 Load: 36.6 t ADT: 9,050

TR196

Good

Over: CREEK

0.17MI S 38TH AV N, Rock Island, IL

Built 2004 Load: 36.6 t ADT: 475

SHERMAN RD CH 1

Good

Over: FANCY CREEK

1.0 E OF SHERMAN, Sangamon, IL

Built 1984 Load: 36.6 t ADT: 1,900

TR 413

Good

Over: POLECAT CREEK

3.7 MI NE HERRICK, Shelby, IL

Built 1985 Load: 36.6 t ADT: 50

FAI 64 WB

Good

Over: Abandoned Rdwy C

0.12 E OF 18TH ST, St. Clair, IL

Built 1968 Load: 36.6 t ADT: 37,900

IL 4

Good

Over: Trib to Silver Creek

1/2 mi south of I-64, St. Clair, IL

Built 1995 Load: 36.6 t ADT: 7,800

ILL 8

Good

Over: BRANCH FARM CREEK

E OF CARVER LANE, Tazewell, IL

Built 2003 Load: 36.6 t ADT: 13,600

UNION SPRINGS RD

Good

Over: CEDAR CREEK

1.4MI EAST ALTO PASS, Union, IL

Built 2018 Load: 36.6 t ADT: 50

TR 206

Good

Over: CEDAR CREEK TRIB

NW 1/4 SEC27 T11NR1W, Warren, IL

Built 1985 Load: 36.6 t ADT: 75

FAP-823 (ILL-15)

Good

Over: WHITE OAK OVERFLOW

1.5 MI W EDWARDS C L, Wayne, IL

Built 1983 Load: 36.6 t ADT: 2,500

1350 E

Good

Over: DRAINAGE DITCH

1 MI W EPWORTH, White, IL

Built 2019 Load: 36.6 t ADT: 25

TIPPLE RD

Good

Over: ROCK CREEK

5 MI SE OF WINNEBAGO, Winnebago, IL

Built 2014 Load: 36.6 t ADT: 125

CLARK ROAD

Good

Over: UNNAMED CREEK

0.2 MI N STEWARD RD, Winnebago, IL

Built 1995 Load: 36.6 t ADT: 25

LAKESIDE DR

Good

Over: KILBURN CREEK

.5 MI N OF KILBURN, Winnebago, IL

Built 2010 Load: 36.6 t ADT: 50

TR 276

Good

Over: BRUSHY CRK

1.6 MI NW COATSBURG, Adams, IL

Built 1983 Load: 36.9 t ADT: 50

IL 140 & IL 127

Good

Over: E Fork Shoal Creek

NW CL of Greenville, Bond, IL

Built 1990 Load: 36.9 t ADT: 4,350

TR 8

Good

Over: TRIB TO LITTLE DRY F

2.5 MI NW OLD RIPLEY, Bond, IL

Built 1985 Load: 36.9 t ADT: 225

I-80 WB

Good

Over: ABBOTT DITCH

3.45 E/HENRY CO LN, Bureau, IL

Built 1963 Load: 36.9 t ADT: 8,950

US 6 FAS 1247

Good

Over: LAWSON CREEK

1.6 MI. W. OF US 34, Bureau, IL

Built 1993 Load: 36.9 t ADT: 950

FAS 529(CH 17)

Good

Over: E LAKE FORK DITCH

3 MI W OF SADORUS, Champaign, IL

Built 1988 Load: 36.9 t ADT: 600

FAS 518(CH 22)

Good

Over: STREAM

0.5 MI N OF OGDEN, Champaign, IL

Built 1992 Load: 36.9 t ADT: 775

TR 255

Good

Over: Lake Fork

0.13 mi W US 51, Christian, IL

Built 2015 Load: 36.9 t ADT: 50

WOLF RD

Good

Over: WELLERS DITCH

0.1 M S IL 58, Cook, IL

Built 1960 Load: 36.9 t ADT: 11,000

CRAWFORD AVE

Good

Over: BUTTERFIELD CREEK

0.3 M N OF US 30, Cook, IL

Built 1986 Load: 36.9 t ADT: 12,400

IL 171 (ARCHER AVE

Good

Over: RR - CSXT SPUR ARGO

0.1 M S OF 63RD ST, Cook, IL

Built 1987 Load: 36.9 t ADT: 28,400

MDWY UPPER LEV RD

Good

Over: ARRIVAL EXIT ROAD

ELE RAMP TO NB CICER, Cook, IL

Built 1998 Load: 36.9 t ADT: 4,450

I-294,80 EB

Good

Over: THORN CR

0.6 M W I94 P24, Cook, IL

Built 1958 Load: 36.9 t ADT: 73,500

IL 23 (FAP 68)

Good

Over: LITTLE INDIAN CREEK

0.6 MI S CHICAGO RD, DeKalb, IL

Built 1991 Load: 36.9 t ADT: 2,150

CH 3

Good

Over: STREAM

2.5 MI W OF NEWMAN, Douglas, IL

Built 1992 Load: 36.9 t ADT: 75

US 36(FAP 323)

Good

Over: CRABAPPLE CREEK

2.0 MI E OF IL 1, Edgar, IL

Built 1931 Load: 36.9 t ADT: 1,350

FAS 1681(CH 7)

Good

Over: STREAM

1 MI W OF PARIS, Edgar, IL

Built 1988 Load: 36.9 t ADT: 100

FAP 323(US 36)

Good

Over: BRUSHY CREEK

.6 MI E OF HUME, Edgar, IL

Built 1991 Load: 36.9 t ADT: 1,350

TR 35

Good

Over: DRAINAGE DITCH

2.5 MI N OF MCCOWN, Edgar, IL

Built 1983 Load: 36.9 t ADT: 50

CH-11 SCHNIEDER RD

Good

Over: BR FIRST SALT CREEK

1.5 MI E TEUTOPOLIS, Effingham, IL

Built 1987 Load: 36.9 t ADT: 350

FAS-1714

Good

Over: SUCK CREEK

4 MI N BROWNSTOWN, Fayette, IL

Built 1964 Load: 36.9 t ADT: 400

IL 54 /FAP 71A

Good

Over: DRUMMER CK BRANCH

2.22mi N/Champaign C, Ford, IL

Built 1992 Load: 36.9 t ADT: 1,100

ILL 47

Good

Over: DRAINAGE DITCH

.3 MI S. OF ILL 9, Ford, IL

Built 1998 Load: 36.9 t ADT: 3,850

CH 4 ELLIOTT RD

Good

Over: UNNAMED STREAM

750 N 1000 E, Ford, IL

Built 2012 Load: 36.9 t ADT: 500

C.H. 11 / F.A.S. 8

Good

Over: N. FK. Cypress Creek

4.25 MI N ILL 13, Gallatin, IL

Built 2018 Load: 36.9 t ADT: 1,100

TR 8 KINSMAN RD

Good

Over: HOG RUN

.24 M S O'MALLEY RD, Grundy, IL

Built 1986 Load: 36.9 t ADT: 150

IL 78

Good

Over: DRAINAGE DITCH

S EDGE OF N JCT IL92, Henry, IL

Built 2002 Load: 36.9 t ADT: 1,400

Showing 22,651-22,700 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.