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

CH 14

Good

Over: LAKE FORK DRAIN DIT

4.0 MI SW IVESDALE, Piatt, IL

Built 1979 Load: 37.9 t ADT: 75

IL 146

Good

Over: FLAT LICK BRANCH

4.2 M E IL 145, Pope, IL

Built 2014 Load: 37.9 t ADT: 1,250

FAS 1920

Good

Over: CREEK

3/4 MILE NW OLMSTED, Pulaski, IL

Built 1975 Load: 37.9 t ADT: 500

FAS 858

Good

Over: TRIB TO CAMP'S CK

3 MI S RUMA, Randolph, IL

Built 1994 Load: 37.9 t ADT: 450

CH 16

Good

Over: MARY'S RIVER

1.7M N OF STEELEVILL, Randolph, IL

Built 1996 Load: 37.9 t ADT: 2,150

TR 50 - First Road

Good

Over: Horse Creek

1.5 Mi NE of Ruma, Randolph, IL

Built 2022 Load: 37.9 t ADT: 75

IL 125

Good

Over: RICHLAND CREEK

.7M E CARTWRIGHT ST., Sangamon, IL

Built 1979 Load: 37.9 t ADT: 5,800

ILL 104

Good

Over: HORSE CREEK

E.PAWNEE CITY LIMITS, Sangamon, IL

Built 1977 Load: 37.9 t ADT: 4,650

FAS 634 CH 01

Good

Over: CANTRALL CREEK

2.5 MI W ANDREW, Sangamon, IL

Built 1984 Load: 37.9 t ADT: 2,500

ILL 157

Good

Over: CANTEEN CREEK

N C LMTS CASEYVILLE, St. Clair, IL

Built 1990 Load: 37.9 t ADT: 11,300

DAVIS ST/ FAU 9301

Good

Over: FISH LAKE

1.25MI W ILL RTE 3, St. Clair, IL

Built 1974 Load: 37.9 t ADT: 400

ILL 40

Good

Over: DEFEAT CREEK

S CL OF BRADFORD, Stark, IL

Built 1996 Load: 37.9 t ADT: 1,650

US BUS. 20

Good

Over: PRESTON CREEK

1 MI. W. FREEPORT, Stephenson, IL

Built 1999 Load: 37.9 t ADT: 2,900

RINK RD

Good

Over: BR OF PECATONICA RIV

.5 MI NE ELEROY, Stephenson, IL

Built 1962 Load: 37.9 t ADT: 150

IL 9 (FAP 697)

Good

Over: STREAM

3.75 MI E OF ILL 49, Vermilion, IL

Built 1962 Load: 37.9 t ADT: 1,950

TR 64

Good

Over: KNIGHT'S BRANCH

3 MI NW COLLISON, Vermilion, IL

Built 1991 Load: 37.9 t ADT: 75

TR 222

Good

Over: Fayette Creek

4.5 mi SW Catlin, Vermilion, IL

Built 2018 Load: 37.9 t ADT: 50

FAS811

Good

Over: JORDAN CREEK

2.75 MI N GARDS PT, Wabash, IL

Built 1998 Load: 37.9 t ADT: 550

CH 19

Good

Over: LITTLE SWAN CREEK

SE-17-T8NR1W, Warren, IL

Built 1990 Load: 37.9 t ADT: 475

STROPES RD

Good

Over: MEREDOSIA DITCH

7 MI S ALBANY, Whiteside, IL

Built 2020 Load: 37.9 t ADT: 50

Klemme Road

Good

Over: Plum Creek

.1 M S. of Exchange, Will, IL

Built 2017 Load: 37.9 t ADT: 2,400

W. BRUNS RD.

Good

Over: TRIB PRAIRIE CREEK

.25M E CEDAR RD, Will, IL

Built 2003 Load: 37.9 t ADT: 300

CORNING ROAD

Good

Over: S. BR ROCK CREEK

0.6 M.E OF CICEROAVE, Will, IL

Built 1900 Load: 37.9 t ADT: 50

MAIN ST

Good

Over: IC RR

0.1 M E IL-50(MONEE), Will, IL

Built 1996 Load: 37.9 t ADT: 225

OLIVER ROAD

Good

Over: RHULE CREEK

0.2 MI W HARRISON RD, Winnebago, IL

Built 1987 Load: 37.9 t ADT: 50

MILL ROAD

Good

Over: MADIGAN CREEK

1 MI E PERRYVILLE RD, Winnebago, IL

Built 2004 Load: 37.9 t ADT: 2,150

SEARLES AVE

Good

Over: NW DRAINAGEWAY

0.1 MI N OF GLENWOOD, Winnebago, IL

Built 1962 Load: 37.9 t ADT: 1,350

TR 65 SCHLAMER RD

Good

Over: TRIB TO SAMMONS CR

SW1/4 SEC2 T15S R3W, Alexander, IL

Built 2003 Load: 38.2 t ADT: 25

US 40/FAS 779

Good

Over: SHOAL CREEK

1.9 MI E POCAHONTAS, Bond, IL

Built 1994 Load: 38.2 t ADT: 1,300

FAS 512 (CH 15)

Good

Over: STREAM

0.5 MI W OF HOMER, Champaign, IL

Built 2019 Load: 38.2 t ADT: 1,400

IL 177

Good

Over: QUEENS LAKE BRANCH

0.2M E NEW MEMPHIS, Clinton, IL

Built 1997 Load: 38.2 t ADT: 2,000

DIVISION ST(FAU 76

Good

Over: TOWN BRANCH CREEK

CHARLESTON N JACKSON, Coles, IL

Built 1976 Load: 38.2 t ADT: 2,200

WINNETKA RD

Good

Over: SKOKIE RIVER

0.3 M E I-94, Cook, IL

Built 1935 Load: 38.2 t ADT: 6,700

US 41 SB TO I-55 W

Good

Over: RR -IC,METRA&PARKING

1.6M E of I94, Cook, IL

Built 2015 Load: 38.2 t ADT: 62,950

I-80

Good

Over: CANADIAN NATIONAL RR

0.2 M W OF IL-394, Cook, IL

Built 2007 Load: 38.2 t ADT: 11,300

GLENVIEW RD

Good

Over: W F N BR CHI RIV

0.1 MI W IL-43 P14, Cook, IL

Built 2001 Load: 38.2 t ADT: 10,300

FAS-1696 TRIMBLE R

Good

Over: SUGAR CREEK

SW TRIMBLE, Crawford, IL

Built 1992 Load: 38.2 t ADT: 2,800

FAP 332 (IL 1)

Good

Over: SUGAR CREEK

0.5 MI N GORDON JCT, Crawford, IL

Built 2022 Load: 38.2 t ADT: 2,400

TR-208

Good

Over: SUGAR FORK

3 MI N EFFINGHAM, Effingham, IL

Built 1988 Load: 38.2 t ADT: 125

TR-251

Good

Over: SALT CREEK

2.5 MI S WATSON WYE, Effingham, IL

Built 1995 Load: 38.2 t ADT: 200

TR 4

Good

Over: WOLF CREEK

1 MI S BEECHER CITY, Effingham, IL

Built 2003 Load: 38.2 t ADT: 300

FAS 1886-NO 9 BLTP

Good

Over: TRIB TO TILLEY CREEK

4 MI SE WF, Franklin, IL

Built 2000 Load: 38.2 t ADT: 450

FAS 1423

Good

Over: GROVE CREEK

2.75 M N BURNSIDE, Hancock, IL

Built 2003 Load: 38.2 t ADT: 125

FAS 426 / CH 17

Good

Over: LA HARPE CREEK

.2 MI W OF WEBSTER, Hancock, IL

Built 1994 Load: 38.2 t ADT: 225

FAS 1322 CH37

Good

Over: TR1 B OF TRAIL CR

0.34 MI E US 52, Iroquois, IL

Built 1932 Load: 38.2 t ADT: 575

US 52

Good

Over: DRAINAGE DITCH

0.43 M N US 24, Iroquois, IL

Built 1994 Load: 38.2 t ADT: 1,200

IL 116 (FAP 681)

Good

Over: drainage ditch

2.15 MI W of I-57, Iroquois, IL

Built 2016 Load: 38.2 t ADT: 850

CH 15

Good

Over: Pike Creek

2 mi. S. of Donovan, Iroquois, IL

Built 2014 Load: 38.2 t ADT: 150

TR 386

Good

Over: CREEK

4 MI EAST OF ELKVILL, Jackson, IL

Built 1986 Load: 38.2 t ADT: 50

FAS 1870 & CH 7

Good

Over: COX CREEK

2.6MI W CAMBELL HILL, Jackson, IL

Built 2005 Load: 38.2 t ADT: 1,100

Showing 22,951-23,000 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.