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

E MIDDLE CREEK RD

Good

Over: MIDDLE CREEK

3 MI W BROOKVILLE, Carroll, IL

Built 2020 Load: 48.6 t ADT: 100

CH-3(FAS 692)

Good

Over: Sugar Creek

2.5 MI N DARWIN, Clark, IL

Built 1970 Load: 48.6 t ADT: 125

TR 43

Good

Over: GREASY CREEK

1.0 MI N BUSHTON, Coles, IL

Built 2019 Load: 48.6 t ADT: 75

IL 21 (MILWAUKEE)

Good

Over: DES PLAINES RIVER

0.3 M SE US 45, Cook, IL

Built 2009 Load: 48.6 t ADT: 20,400

TR 68

Good

Over: FULFER CREEK

1.5 MI NW MASON, Effingham, IL

Built 2010 Load: 48.6 t ADT: 100

IL 54

Good

Over: Trib Big Four Ditch

7.06 M N OF IL 9, Ford, IL

Built 2016 Load: 48.6 t ADT: 1,650

I-57 SB

Good

Over: POND CREEK

S OF SCL W FRANKFORT, Franklin, IL

Built 2022 Load: 48.6 t ADT: 21,600

BASSET SCHOOL RD

Good

Over: HOSICK CREEK

1 MI NE OF E'TOWN, Hardin, IL

Built 2019 Load: 48.6 t ADT: 150

US 45 FAS 338

Good

Over: SPRING CREEK

10.58 MI S OF IL 54, Iroquois, IL

Built 2009 Load: 48.6 t ADT: 1,900

US 45/FAS 317

Good

Over: PRAIRIE CREEK

0.85 MI N OF US 24, Iroquois, IL

Built 2010 Load: 48.6 t ADT: 1,450

IL 3-FAP 312

Good

Over: REEDS CREEK

4 MI S RANDOLPH CO, Jackson, IL

Built 2001 Load: 48.6 t ADT: 2,150

TR 77

Good

Over: LITTLE CACHE CREEK

NW1/4 SEC 3 T12S,R3E, Johnson, IL

Built 1985 Load: 48.6 t ADT: 50

CORRON ROAD

Good

Over: BR OF FERSON CREEK

250' S OF FAIR OAKS, Kane, IL

Built 2012 Load: 48.6 t ADT: 4,150

Garden Crescent Dr

Good

Over: Tyler Creek

0.3 Mi N Wing St., Kane, IL

Built 1977 Load: 48.6 t ADT: 1,900

IL 173

Good

Over: DES PLAINES RIVER

0.2 M E OF US 41, Lake, IL

Built 1929 Load: 48.6 t ADT: 11,200

IL 134

Good

Over: SQUAW CREEK

1.75 M E OF US 12, Lake, IL

Built 1994 Load: 48.6 t ADT: 7,750

ILL 47/FAP 326

Good

Over: VERMILION RIVER

.07 M S OF US 24, Livingston, IL

Built 1993 Load: 48.6 t ADT: 3,200

ILL 4

Good

Over: Trib E Fk Silver Crk

.8 MI S US 40, Madison, IL

Built 1980 Load: 48.6 t ADT: 7,000

ILL 17

Good

Over: SENACHWINE CREEK

3.5 MI W OF SPARLAND, Marshall, IL

Built 2009 Load: 48.6 t ADT: 550

IL 176

Good

Over: DRAINAGE DITCH

.2M E OF IL23, McHenry, IL

Built 2012 Load: 48.6 t ADT: 5,700

BARNARDS MILL ROAD

Good

Over: NIPPERSINK CR

AT HOWE RD INTERSECT, McHenry, IL

Built 1950 Load: 48.6 t ADT: 4,200

IL 127

Good

Over: W FK SHOAL CR.TRIB.

1.6M S IL 48, Montgomery, IL

Built 1990 Load: 48.6 t ADT: 2,950

FAS 614

Good

Over: N FK MAUVAISE TERRE

3.0 MI N ALEXANDER, Morgan, IL

Built 1998 Load: 48.6 t ADT: 1,350

IL 78

Good

Over: INDIAN CREEK

3.7 M S CASS COUNTY, Morgan, IL

Built 2015 Load: 48.6 t ADT: 2,100

FAP 42-IL 13/127

Good

Over: YOUNGS CREEK

1 MI N JACKSON CO, Perry, IL

Built 2000 Load: 48.6 t ADT: 3,750

FAI 72 (EB)

Good

Over: UPRR/RECREATION DR

1.3M W I-55, Sangamon, IL

Built 1966 Load: 48.6 t ADT: 20,450

CURRAN RD (OLD IL

Good

Over: PANTHER CREEK

.5M N IL4, N AUBURN, Sangamon, IL

Built 2002 Load: 48.6 t ADT: 1,150

WABASH AVE (FAP 66

Good

Over: JACKSONVILLE BRANCH

.5M E VETERANS/IL 4, Sangamon, IL

Built 1976 Load: 48.6 t ADT: 21,300

ILL 106

Good

Over: LITTLE SANDY CREEK

1.5 MI N ALSEY, Scott, IL

Built 1934 Load: 48.6 t ADT: 1,150

FAS 637 (CH 21)

Good

Over: BR OF FLAT BRANCH

2 MI E OF MOWEAQUA, Shelby, IL

Built 2023 Load: 48.6 t ADT: 800

IL 159

Good

Over: CSXRR & Canteen Creek

Collinsville S C.L., St. Clair, IL

Built 1980 Load: 48.6 t ADT: 16,300

FAP 332(IL 1,US 15

Good

Over: STREAM

1 MI S WESTVILLE, Vermilion, IL

Built 1991 Load: 48.6 t ADT: 7,550

ILL 153

Good

Over: ARCHIE CREEK

3.5 M N CO LINE, Washington, IL

Built 1932 Load: 48.6 t ADT: 1,250

IL 104

Good

Over: GRINDSTONE CR

2 M W BEVERLY RD, Adams, IL

Built 2011 Load: 48.9 t ADT: 775

I 90 EB

Good

Over: MOSQUITO CKR

3 MI SE OF BELVIDERE, Boone, IL

Built 2013 Load: 48.9 t ADT: 27,150

FAS 502

Good

Over: Ditch

W of Leverett, Champaign, IL

Built 2015 Load: 48.9 t ADT: 2,250

US 51 NB

Good

Over: FLAT BRANCH CREEK

S EDGE MOWEAQUA, Christian, IL

Built 2003 Load: 48.9 t ADT: 4,600

US 51SB

Good

Over: FLAT BRANCH CREEK

S EDGE MOWEAQUA, Christian, IL

Built 2003 Load: 48.9 t ADT: 4,600

FAS 1707(US 40)

Good

Over: LITTLE CREEK

1.5 MI E MARSHALL, Clark, IL

Built 2000 Load: 48.9 t ADT: 4,750

123RD ST

Good

Over: RR - METRA

1.7 M E US 45, Cook, IL

Built 1943 Load: 48.9 t ADT: 6,650

I-290 EB

Good

Over: SALT CREEK

0.6 M NW OF IL 83, DuPage, IL

Built 2019 Load: 48.9 t ADT: 69,300

FAP 841-IL 154

Good

Over: LITTLE MUDDY OVERFLO

PERRY/FRANKLIN CO LI, Franklin, IL

Built 2002 Load: 48.9 t ADT: 2,300

IL 96

Good

Over: RILEY CR

3.3 M S OF NAUVOO, Hancock, IL

Built 2011 Load: 48.9 t ADT: 1,050

TR 352A

Good

Over: INDIAN CREEK

T10S R1W W1/2 SEC36, Jackson, IL

Built 1900 Load: 48.9 t ADT: 100

TR 214

Good

Over: EGG BAG CR

E 12TH N 1430, LaSalle, IL

Built 1956 Load: 48.9 t ADT: 125

W CHESTNUT ST

Good

Over: STREAM

BRIDGEPORT, Lawrence, IL

Built 1999 Load: 48.9 t ADT: 200

ILL 3 NB

Good

Over: CAHOKIA DIVERSION

2.5 MI N FAI 270, Madison, IL

Built 2000 Load: 48.9 t ADT: 13,800

ILL 3 SB

Good

Over: CAHOKIA DIVERSION

2.5MI N FAI 270, Madison, IL

Built 2000 Load: 48.9 t ADT: 13,800

US 67 NB

Good

Over: TRIB S BR PIASA CRK

1.5MI SO. JERSEY CO, Madison, IL

Built 2009 Load: 48.9 t ADT: 11,200

TR 228 BLACKJACK R

Good

Over: N FK MILL CK

3.0MI SE TROY, Madison, IL

Built 2012 Load: 48.9 t ADT: 200

Showing 24,651-24,700 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.