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

SBI-11/FR-918

Poor

Over: LILLY CREEK

5 MI W EFFINGHAM, Effingham, IL

Built 1919 Load: 19.4 t ADT: 10

TR-310

Poor

Over: DIETERICH CREEK

2 MI SW DIETERICH, Effingham, IL

Built 1909 Load: 19.4 t ADT: 100

FAU 9452

Poor

Over: SUGAR CREEK

FAU 9452-OV SUGAR CR, Franklin, IL

Built 1964 Load: 19.4 t ADT: 1,050

ILL 116

Poor

Over: BR OF SWEGLE CR

LONDON MILLS, Fulton, IL

Built 1933 Load: 19.4 t ADT: 1,600

MIDDLE GRVE RD-TR4

Poor

Over: COAL CREEK

SW-7-T8NR4E, Fulton, IL

Built 1938 Load: 19.4 t ADT: 50

FAS 892

Poor

Over: SALINE RIVER

1.2 MI E OF IL 1, Gallatin, IL

Built 1900 Load: 19.4 t ADT: 350

TR 0267

Poor

Over: SAND CREEK

4.1 M SE OF CARROLLT, Greene, IL

Built 1985 Load: 19.4 t ADT: 50

CALHOUN ST

Poor

Over: ILL MICHIGAN CANAL

CALHOUN ST OV I&M C, Grundy, IL

Built 1930 Load: 19.4 t ADT: 900

TR 27

Poor

Over: BRANCH OF SPRING CR.

3.0 MI NW LAHARPE, Hancock, IL

Built 1950 Load: 19.4 t ADT: 50

TR 71

Poor

Over: TILTON CREEK

2.5 MI SW DURHAM, Hancock, IL

Built 1928 Load: 19.4 t ADT: 75

BRAIR BLUFF RD

Poor

Over: TURNER CREEK

0.4 MI. N. OF US 6, Henry, IL

Built 1920 Load: 19.4 t ADT: 125

TR 163

Poor

Over: OAT CREEK

4.5 MI SW ATKINSON, Henry, IL

Built 1937 Load: 19.4 t ADT: 50

TR 194

Poor

Over: BR OF SPRING CREEK

3.5 MI NE CAMBRIDGE, Henry, IL

Built 1930 Load: 19.4 t ADT: 50

TR 285

Poor

Over: MUD CREEK TRIBUTARY

2.0 MI N KEWANEE, Henry, IL

Built 1958 Load: 19.4 t ADT: 225

FAS1335CH42

Poor

Over: TRIB LITTLE MUD CR

3MI NW CISSNA PARK, Iroquois, IL

Built 1918 Load: 19.4 t ADT: 150

TR 54

Poor

Over: STREAM

2 M E OF HERSCHER, Kankakee, IL

Built 1978 Load: 19.4 t ADT: 50

BRISBIN RD/MS0020

Poor

Over: WEST AUX SABLE CK

1 MI N OF ILL RT 52, Kendall, IL

Built 1971 Load: 19.4 t ADT: 225

TR 232

Poor

Over: CROOKED LEG CREEK

E 13TH N 4150, LaSalle, IL

Built 1961 Load: 19.4 t ADT: 50

UNION ST

Poor

Over: GUM CR

UNION ST OV GUM CR, LaSalle, IL

Built 1920 Load: 19.4 t ADT: 125

POST ST

Poor

Over: GOOSE CR

300FT N OF PRAIRIE, LaSalle, IL

Built 1940 Load: 19.4 t ADT: 650

FR 505

Poor

Over: STREAM

1 MI N BRIDGEPORT, Lawrence, IL

Built 1910 Load: 19.4 t ADT: 225

FAS-807

Poor

Over: LITTLE BONPAS

4 MI S SUMNER, Lawrence, IL

Built 1909 Load: 19.4 t ADT: 1,100

TR-10

Poor

Over: SHIRLEY CREEK

1 MI W SUMNER, Lawrence, IL

Built 1909 Load: 19.4 t ADT: 75

LEE CENTER RD

Poor

Over: TRIB OF GREEN RIVER

0.37MI SW INLET RD, Lee, IL

Built 1950 Load: 19.4 t ADT: 200

FRANKLIN ROAD

Poor

Over: BR OF FRANKLIN CR

0.8 M S FRANKLIN GRO, Lee, IL

Built 1966 Load: 19.4 t ADT: 550

INLET ROAD

Poor

Over: BR OF GREEN RIVER

0.6 M N OF SHAW RD, Lee, IL

Built 1962 Load: 19.4 t ADT: 400

EARLVILLE ROAD

Poor

Over: UNNAMED STREAM

1.3 M S OF S PAW PAW, Lee, IL

Built 1966 Load: 19.4 t ADT: 225

TR 92C

Poor

Over: WOLF CREEK

2120N,1200E, Livingston, IL

Built 1920 Load: 19.4 t ADT: 100

TR 1 E

Poor

Over: CREEK

880 E, 3300 N, Livingston, IL

Built 1929 Load: 19.4 t ADT: 400

TR 173

Poor

Over: JOE CREEK

3 MI. W. HETTICK, Macoupin, IL

Built 1916 Load: 19.4 t ADT: 50

TR 253/CROSSCREEK

Poor

Over: SHAW PT BR

7 MI E 1 MI S CARLIN, Macoupin, IL

Built 1900 Load: 19.4 t ADT: 20

TR 359

Poor

Over: CAHOKIA CREEK

2 MI S HORNSBY, Macoupin, IL

Built 1900 Load: 19.4 t ADT: 50

TR 359

Poor

Over: CAHOKIA CREEK

2 MI S HORNSBY, Macoupin, IL

Built 1900 Load: 19.4 t ADT: 50

TR 498

Poor

Over: CREEK

4.5 NE STANDARD CY, Macoupin, IL

Built 1900 Load: 19.4 t ADT: 35

LOWR MARINE RD/TR2

Poor

Over: SUGAR FORK CREEK

1 MI SE MARINE, Madison, IL

Built 1963 Load: 19.4 t ADT: 300

TR 288

Poor

Over: CONRAIL RR

1.5MN E LIVINGSTON, Madison, IL

Built 1901 Load: 19.4 t ADT: 225

TR-6

Poor

Over: COLES CREEK

2 MI NW SANDOVAL, Marion, IL

Built 1909 Load: 19.4 t ADT: 100

TR-405

Poor

Over: RACCOON CREEK

3 MI NE WALNUT HILL, Marion, IL

Built 1971 Load: 19.4 t ADT: 25

PELL ROAD

Poor

Over: STREAM E OF US 45

.25 MI E US45, Massac, IL

Built 1900 Load: 19.4 t ADT: 550

TR 82

Poor

Over: LAHARPE CREEK

SW-22-T7NR4W, McDonough, IL

Built 1900 Load: 19.4 t ADT: 10

TR 324

Poor

Over: CREEK

2.5 MI SW FILLMORE, Montgomery, IL

Built 1900 Load: 19.4 t ADT: 50

TR 39 (CR 2000N)

Poor

Over: W Okaw River Trib

1150E CR 2000N, Moultrie, IL

Built 1995 Load: 19.4 t ADT: 20

TR 35 (CR 2050N)

Poor

Over: Jonathan Branch

1190E CR 2050N, Moultrie, IL

Built 1992 Load: 19.4 t ADT: 20

TR 142

Poor

Over: WHITLEY CREEK

2.5 MI E OF BRUCE, Moultrie, IL

Built 1917 Load: 19.4 t ADT: 100

VORHEES ROAD

Poor

Over: FARGO RUN

SW-31-T10NR7E, Peoria, IL

Built 1916 Load: 19.4 t ADT: 75

TR 371

Poor

Over: BUCK BRANCH

2.0 MI SE NEBO, Pike, IL

Built 1900 Load: 19.4 t ADT: 50

TR 498A

Poor

Over: BUCKHORN CREEK

2.5 MI N PEARL, Pike, IL

Built 1920 Load: 19.4 t ADT: 25

TR 98A

Poor

Over: HADLEY CR TRIBUTARY

0.07 MI SW 106 BARRY, Pike, IL

Built 1900 Load: 19.4 t ADT: 25

TR 310

Poor

Over: BUCK BRANCH TRIBUTAR

2 MI SW NEBO, Pike, IL

Built 1948 Load: 19.4 t ADT: 50

FAS 938

Poor

Over: CREEK

2 MI SE ULLIN, Pulaski, IL

Built 1965 Load: 19.4 t ADT: 1,750

Showing 25,901-25,950 of 27,743 bridges

Related

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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.