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

FAI 64 WB

Good

Over: SUGAR CK OVERFLOW

1/2 mi W DAMIANSVLLE, Clinton, IL

Built 1971 Load: 40.5 t ADT: 15,500

IL 161

Good

Over: KASKASKIA RIVER OVFL

5.2M EAST BARTELSO, Clinton, IL

Built 1994 Load: 40.5 t ADT: 2,250

NORTHWEST HWY (RAN

Good

Over: CREEK

1 M SE US 45, Cook, IL

Built 1957 Load: 40.5 t ADT: 18,300

SOUTHWEST HWY

Good

Over: RR - CSXT, CREEK,ETC

0.5 M NE I-294, Cook, IL

Built 1999 Load: 40.5 t ADT: 20,900

FAS 1517(US 150)

Good

Over: SALT CREEK

SE EDGE FARMER CITY, De Witt, IL

Built 1993 Load: 40.5 t ADT: 1,300

US 36(FAP 323)

Good

Over: LICK RUN

1.5 MI W OF INDIANA, Edgar, IL

Built 1988 Load: 40.5 t ADT: 1,100

FAP 323(US 36)

Good

Over: STREAM

.4 MI E OF METCALF, Edgar, IL

Built 1991 Load: 40.5 t ADT: 1,550

TR-104

Good

Over: CREEK

0.25 MI E ALBION, Edwards, IL

Built 1993 Load: 40.5 t ADT: 275

FAP 750 (IL 185)

Good

Over: E FORK KASK RIV

1.1 MI NW I-57, Fayette, IL

Built 2011 Load: 40.5 t ADT: 1,050

FAS-716 (CH-4)

Good

Over: OVERFLOW TO BIGCREEK

6 MI N ST ELMO, Fayette, IL

Built 1934 Load: 40.5 t ADT: 625

ILL 9 & 47

Good

Over: DRUMMER CREEK

0.08 MI N OF ILL 54, Ford, IL

Built 1990 Load: 40.5 t ADT: 3,350

ILL 148

Good

Over: ANDY CREEK

3.7M NO OF ILL 14, Franklin, IL

Built 1965 Load: 40.5 t ADT: 4,100

FAP 869-IL 14

Good

Over: BIGMUDDY RV OVERFLOW

NEAR WCL OF WESTCITY, Franklin, IL

Built 2001 Load: 40.5 t ADT: 6,750

FAS 1878

Good

Over: TRIB MIDDLE FORK

650N 1340E, Franklin, IL

Built 1991 Load: 40.5 t ADT: 1,050

ILL 13

Good

Over: STREAM

0.7M W OF ILL 1, Gallatin, IL

Built 1968 Load: 40.5 t ADT: 3,700

Hillview Eldred Rd

Good

Over: APPLE CREEK

4.5 MI SO HILLVIEW, Greene, IL

Built 1999 Load: 40.5 t ADT: 300

FAP 776 (IL 142)

Good

Over: TRIB TO CONTRARY CRK

9.8 MI S IL 14, Hamilton, IL

Built 2009 Load: 40.5 t ADT: 2,100

ILL 94

Good

Over: LAMOINE RIVER

1.4 MI N JCT 9 & 94, Hancock, IL

Built 1992 Load: 40.5 t ADT: 1,250

TR 261

Good

Over: CRYSTAL CREEK

2.6 SE HAMILTON, Hancock, IL

Built 1984 Load: 40.5 t ADT: 50

ILL 146

Good

Over: BIG CREEK

WEST CORP E'TOWN, Hardin, IL

Built 2004 Load: 40.5 t ADT: 1,900

IL 82

Good

Over: DRAINAGE DITCH

2.98 MI S JCT ILL 92, Henry, IL

Built 2009 Load: 40.5 t ADT: 1,800

CH 14

Good

Over: MUD CR

5 MI S OF ATKINSON, Henry, IL

Built 2019 Load: 40.5 t ADT: 250

US 45

Good

Over: Prairie Creek

2.35 M N of US 24, Iroquois, IL

Built 2020 Load: 40.5 t ADT: 1,350

CH 13-CHATAUQUA ST

Good

Over: TRIB CRAB ORCHARD CR

0.2M W OF EMARALD LN, Jackson, IL

Built 1976 Load: 40.5 t ADT: 2,700

SPRINGER RIDGE TR3

Good

Over: DRURY CREEK

S.W 1/4 SEC3-10-1, Jackson, IL

Built 1983 Load: 40.5 t ADT: 750

ILLINOIS 146

Good

Over: DUTCHMAN CREEK

2.3 MI. W. VIENNA, Johnson, IL

Built 1973 Load: 40.5 t ADT: 3,100

IL 71

Good

Over: VERMILION RIVER

3.2 MI W OF IL 178, LaSalle, IL

Built 2006 Load: 40.5 t ADT: 2,200

FAU6121 & I-39 SB

Good

Over: CONVEYOR BELT

.25 MI N OF US 6, LaSalle, IL

Built 1985 Load: 40.5 t ADT: 1,825

TR 469

Good

Over: COVEL CREEK

N 20TH E 2285, LaSalle, IL

Built 2019 Load: 40.5 t ADT: 50

FAS-1808 (SBI-12)

Good

Over: STREAM

6 MI E LAWRENCEVILLE, Lawrence, IL

Built 1995 Load: 40.5 t ADT: 2,450

TR-10A

Good

Over: BUGABOO CREEK

2.5 MI NNWSUMNER, Lawrence, IL

Built 1991 Load: 40.5 t ADT: 20

TR-227A

Good

Over: DRAIN DITCH

4 MI S BRIDGEPORT, Lawrence, IL

Built 1996 Load: 40.5 t ADT: 100

FAS 346

Good

Over: TRIB SFK VERMIL CRK

2 MI N FAIRBURY, Livingston, IL

Built 1999 Load: 40.5 t ADT: 1,600

TR 29 SHELLABARGER

Good

Over: DITCH

1 MI. N WARRENSBURG, Macon, IL

Built 2019 Load: 40.5 t ADT: 25

FAU 9079/OLD COR R

Good

Over: MADISON CTY DITCH

2MI EAST IL 111, Madison, IL

Built 2007 Load: 40.5 t ADT: 2,200

IL 255 SB (FAP310S

Good

Over: E FORK WOOD RIVER CK

.75 MI S OF CULP LN, Madison, IL

Built 2005 Load: 40.5 t ADT: 16,300

IL 255 NB (FAP310N

Good

Over: E FORK WOODRIVER CK

.75 MI S OF CULP LN, Madison, IL

Built 2005 Load: 40.5 t ADT: 16,300

TR 281 LOWER MARIN

Good

Over: TRIB TO WENDELL CK

1/2 EAST TROY, Madison, IL

Built 1992 Load: 40.5 t ADT: 575

US 50

Good

Over: DUMS CREEK WEST

4 MI E SALEM, Marion, IL

Built 1952 Load: 40.5 t ADT: 3,750

TR-201

Good

Over: BRUBAKER CREEK

2 MI E SALEM, Marion, IL

Built 1984 Load: 40.5 t ADT: 75

ILL 9

Good

Over: SPRING CREEK

4.3 MI E BLANDINSVIL, McDonough, IL

Built 1997 Load: 40.5 t ADT: 1,600

IL 336

Good

Over: E. FORK LAMOINE RIV

0.27MI N US 136, McDonough, IL

Built 2015 Load: 40.5 t ADT: 1,600

FAU 6348/OLD RT66

Good

Over: MONEY CREEK

14.5 MI S OF US 24, McLean, IL

Built 1999 Load: 40.5 t ADT: 2,950

FAS 349/CH 13

Good

Over: MACKINAW RIVER

0.5 MI SW OF COLFAX, McLean, IL

Built 2023 Load: 40.5 t ADT: 400

ILL 97

Good

Over: ROCK CREEK

3.5M N SALISBURY, Menard, IL

Built 1989 Load: 40.5 t ADT: 3,900

US 24 & ILL 9 (EB)

Good

Over: LITTLE LAMARSH CR

1 MI W OF MAPLETON, Peoria, IL

Built 1955 Load: 40.5 t ADT: 10,800

Bridge Street

Good

Over: CREEK

MONTICELLO, Piatt, IL

Built 1982 Load: 40.5 t ADT: 400

ILL 37

Good

Over: HODGES BAYOU

1.4 MI S OLMSTED, Pulaski, IL

Built 1991 Load: 40.5 t ADT: 1,150

IL 154

Good

Over: MAXWELL CREEK

EAST OF SPARTA, Randolph, IL

Built 2002 Load: 40.5 t ADT: 4,300

BLUFF RD/MODOC RD

Good

Over: BARBEAU CREEK

11/2MI SE PRAIRIE DR, Randolph, IL

Built 1998 Load: 40.5 t ADT: 400

Showing 23,501-23,550 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.