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 643

Good

Over: Boyd Creek Trib

1.5 Mi N Mill Shoals, Wayne, IL

Built 2017 Load: 41.5 t ADT: 150

TR 558

Good

Over: POND CREEK DRAIN DIT

3 MI SW GOLDEN GATE, Wayne, IL

Built 2022 Load: 41.5 t ADT: 25

FAP 877 (IL 141)

Good

Over: TRIB CANE CREEK

.25 MI E JCT IL 1, White, IL

Built 2020 Load: 41.5 t ADT: 2,400

95TH ST

Good

Over: SPRINGBROOK

0.1 MI WPL./NAPERVIL, Will, IL

Built 1964 Load: 41.5 t ADT: 16,900

FAS 1900

Good

Over: LITTLE WOLF CREEK

4 MI NW PULLEYS MILL, Williamson, IL

Built 1942 Load: 41.5 t ADT: 2,100

HARRISON ROAD

Good

Over: RHULE CREEK

2.8 MI S OF ILL 75, Winnebago, IL

Built 1989 Load: 41.5 t ADT: 250

PATTERSON RD

Good

Over: S. FORK OTTER CREEK

0.75 MI. N. IL 75, Winnebago, IL

Built 2001 Load: 41.5 t ADT: 275

RIFLE RANGE RD

Good

Over: HARTLINE CREEK

0.5 MILE SE OF ELCO, Alexander, IL

Built 2008 Load: 41.8 t ADT: 10

MCKEE RD

Good

Over: MILLER CREEK

MCKEE RD, Alexander, IL

Built 2020 Load: 41.8 t ADT: 10

ILL 96

Good

Over: WILDCAT HOLLOW CREEK

6.1 MI NO. MOZIER, Calhoun, IL

Built 1999 Load: 41.8 t ADT: 675

IL 78

Good

Over: LITTLE JOBS CREEK

4.3M N IL 125, Cass, IL

Built 1994 Load: 41.8 t ADT: 1,500

I-74(WB)

Good

Over: SALINE DRAIN DITCH

1.5 MI W ST JOSEPH, Champaign, IL

Built 1959 Load: 41.8 t ADT: 14,150

I-74(EB)

Good

Over: SALINE DRAIN DITCH

1.5 MI W ST JOSEPH, Champaign, IL

Built 1959 Load: 41.8 t ADT: 14,150

FAS 516(CH 32)

Good

Over: SPOON RIVER

3.2 MI S OF GIFFORD, Champaign, IL

Built 2023 Load: 41.8 t ADT: 525

MEACHAM-PLUM GROVE

Good

Over: SALT CREEK

0.3 M N IL 62, Cook, IL

Built 1997 Load: 41.8 t ADT: 12,100

US 30

Good

Over: DRAINAGE DITCH

0.6 M E OF TORRENCE, Cook, IL

Built 2003 Load: 41.8 t ADT: 18,200

TR 221A

Good

Over: BIG CREEK

1.6 MI NE PIERCEBURG, Crawford, IL

Built 2019 Load: 41.8 t ADT: 50

IL 72

Good

Over: TribBranchKishwaukee

0.1mi E of Ogle Co L, DeKalb, IL

Built 2020 Load: 41.8 t ADT: 2,150

Brickvale Drive

Good

Over: Willow Creek

300' S of Devon Ave, DuPage, IL

Built 2021 Load: 41.8 t ADT: 175

CH 4

Good

Over: BEAR CREEK

2 MI W SAMSVILLE, Edwards, IL

Built 2010 Load: 41.8 t ADT: 175

HARMONY CHURCH RD

Good

Over: TRIB TO POND CREEK

0.5MI W OLD MARION R, Franklin, IL

Built 2020 Load: 41.8 t ADT: 600

IL 108

Good

Over: HURRICANE CREEK

1.1 MI W FAS 739, Greene, IL

Built 1999 Load: 41.8 t ADT: 375

ILL 53

Good

Over: UNION PACIFIC RR

S. EDGE OF GARDNER, Grundy, IL

Built 2000 Load: 41.8 t ADT: 1,900

LOWERY RD CH-7

Good

Over: WAUPECAN CR

0.38 MI W OF ILL 47, Grundy, IL

Built 2017 Load: 41.8 t ADT: 125

TR 175

Good

Over: Lamoine River

0.18 mi E TR 232, Hancock, IL

Built 2020 Load: 41.8 t ADT: 50

ILL 146

Good

Over: PETERS CREEK

3 MI E ELIZABETHTOWN, Hardin, IL

Built 2013 Load: 41.8 t ADT: 1,500

IL 3

Good

Over: BRANCH REEDS CREEK

2.8 MI S RANDOLPH CO, Jackson, IL

Built 2012 Load: 41.8 t ADT: 2,150

TR 23

Good

Over: BRUSHY CREEK

NE CORN W 1/2 10-7-1, Jackson, IL

Built 1987 Load: 41.8 t ADT: 125

TR-44

Good

Over: Muddy Creek

1.6 Mi. N. Wheeler, Jasper, IL

Built 2018 Load: 41.8 t ADT: 100

SILVER GLEN RD

Good

Over: TRIB. TO OTTER CREEK

1.07 MI W RANDALL RD, Kane, IL

Built 2011 Load: 41.8 t ADT: 6,950

HOPPS ROAD

Good

Over: OTTER CREEK

1 MI W RANDALL ROAD, Kane, IL

Built 2012 Load: 41.8 t ADT: 3,150

LAFOX ROAD

Good

Over: MILL CREEK

0.4 MI N IL RTE 38, Kane, IL

Built 2014 Load: 41.8 t ADT: 8,150

I-57 NB

Good

Over: RR & DrainageDitch

0.9 M N of IL 17, Kankakee, IL

Built 2023 Load: 41.8 t ADT: 14,450

US 34

Good

Over: ROB ROY CREEK

2.05 M W of IL 47, Kendall, IL

Built 2019 Load: 41.8 t ADT: 18,700

FAU 4000 ELDAMAIN

Good

Over: FOX RIVER

1 M W YORKVILLE, Kendall, IL

Built 2023 Load: 41.8 t ADT: 500

GROVE RD FAS 1259

Good

Over: AUX SABLE CR BR

SEC 29/30 SEWARD TWP, Kendall, IL

Built 2020 Load: 41.8 t ADT: 600

IL 178

Good

Over: I & M CANAL

1.47 M S of US 6, LaSalle, IL

Built 2012 Load: 41.8 t ADT: 3,600

US 52

Good

Over: Mission Creek

2.12 M E of IL 71, LaSalle, IL

Built 2017 Load: 41.8 t ADT: 1,600

IL 121

Good

Over: BRANCH SALT CREEK

0.8 MI N MT PULASKI, Logan, IL

Built 1998 Load: 41.8 t ADT: 3,500

FAS 561

Good

Over: Deer Creek

1 MI S of Lincoln, Logan, IL

Built 2019 Load: 41.8 t ADT: 800

Jefferson Street

Good

Over: Brainards Branch

0.46 mi N of IL 10, Logan, IL

Built 2019 Load: 41.8 t ADT: 550

US 67 NB

Good

Over: SO. BRANCH PIASA CR.

1.4MI SO. JERSEY CO., Madison, IL

Built 2009 Load: 41.8 t ADT: 11,200

CH-23

Good

Over: DUMS CREEK

7.5 MI S KINMUNDY, Marion, IL

Built 1979 Load: 41.8 t ADT: 250

FRANKLINEVILLE ROA

Good

Over: KISHWAUKEE RIVER

0.3 MI N IL-176, McHenry, IL

Built 2014 Load: 41.8 t ADT: 1,500

FAS 2484

Good

Over: MONEY CREEK

2.87 MI N OF ILL 9, McLean, IL

Built 2010 Load: 41.8 t ADT: 425

FAS 484 - CH 14

Good

Over: MONEY CREEK

0.75 MI E TOWANDA, McLean, IL

Built 2005 Load: 41.8 t ADT: 725

VIRGINIA ST-FAU 63

Good

Over: SUGAR CREEK

0.7 MI N 51 & 150, McLean, IL

Built 2010 Load: 41.8 t ADT: 3,600

FAS 212 (CH 9)

Good

Over: CAMP CREEK

NW-8-T14NR4W, Mercer, IL

Built 2018 Load: 41.8 t ADT: 300

BAILEYVILLE RD

Good

Over: CRANE GROVE CREEK

E. EDGE BAILEYVILLE, Ogle, IL

Built 1998 Load: 41.8 t ADT: 1,300

FAP 42-IL 13/127

Good

Over: CHICKEN CREEK

SCL OF PINCKNEYVILLE, Perry, IL

Built 2001 Load: 41.8 t ADT: 4,700

Showing 23,751-23,800 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.