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

PRESS RD/ TR 197

Poor

Over: RICHLAND CREEK

1.5 MI E ILL. 159, St. Clair, IL

Built 1922 Load: 23.3 t ADT: 375

TR 367

Poor

Over: MCKEE CK

4.6 MI W KELLERVILLE, Adams, IL

Built 1933 Load: 23.7 t ADT: 75

TR 361

Poor

Over: FOX CREEK

3 MI NW OF MILO, Bureau, IL

Built 1968 Load: 23.7 t ADT: 25

167TH(170TH)ST

Poor

Over: THORN CREEK

0.4 M E I94 P24, Cook, IL

Built 1935 Load: 23.7 t ADT: 10,200

TR 306

Poor

Over: WILLIAMS CREEK

2.5 MI SW AUGUSTA, Hancock, IL

Built 1969 Load: 23.7 t ADT: 25

TR 46

Poor

Over: CHANEY CREEK

1 MI N OF HAMILTON, Hancock, IL

Built 1956 Load: 23.7 t ADT: 200

TR 188

Poor

Over: LAKE FORK CK FLD PLN

2 MI S LAKE FORK, Logan, IL

Built 1969 Load: 23.7 t ADT: 50

ILL 34 & 145

Poor

Over: STREAM

1.3 MI N OF ILL 145, Saline, IL

Built 1924 Load: 23.7 t ADT: 4,100

TR 279

Poor

Over: SOUTH FORK MUD CREEK

5 MI S LIVELY GROVE, Washington, IL

Built 1925 Load: 23.7 t ADT: 175

ARCH ROAD

Poor

Over: WINNEBAGO DITCH

7 MI S ROCK FALLS, Whiteside, IL

Built 1976 Load: 23.7 t ADT: 75

WEST DOTY ROAD

Poor

Over: DRAINAGE DITCH

1 MI SO OF SAVANNA, Carroll, IL

Built 1984 Load: 24.0 t ADT: 150

WASHINGTON ST

Poor

Over: S BR CHICAGO RIV

384 W WASHINGTON, Cook, IL

Built 1913 Load: 24.0 t ADT: 9,600

WARREN CO. TR 4

Poor

Over: S. FK. HENDERSON CR.

SE-24-T10NR4W, Henderson, IL

Built 1970 Load: 24.0 t ADT: 25

TR 26A MFT 110 TR

Poor

Over: LOUIS CREEK

1MI N BUCKLEY, Iroquois, IL

Built 1916 Load: 24.0 t ADT: 75

TR 285

Poor

Over: TRIB TO SUGAR CREEK

1.5N 1E OF STOCKLAND, Iroquois, IL

Built 1983 Load: 24.0 t ADT: 75

BUDD RD

Poor

Over: HOLLENBACK CREEK

NEAR MILLBROOK, Kendall, IL

Built 1978 Load: 24.0 t ADT: 700

FAS-2791

Poor

Over: RACCOON CREEK

1.3 MI N WALNUT HILL, Marion, IL

Built 1909 Load: 24.0 t ADT: 375

JUNCTION ROAD

Poor

Over: DRAINAGE DITCH

3. N DAVIS JUNCTION, Ogle, IL

Built 1978 Load: 24.0 t ADT: 425

TR 332

Poor

Over: MIDDLE FK MCKEE TRIB

2.0 W OF PERRY, Pike, IL

Built 1915 Load: 24.0 t ADT: 25

TR 84A

Poor

Over: SO BR LT MISSOURI

4.5 MI NW MT STERLIN, Brown, IL

Built 1900 Load: 24.3 t ADT: 75

TR-186

Poor

Over: Branch Bureau Creek

2 MI W OF TISKILWA, Bureau, IL

Built 1948 Load: 24.3 t ADT: 75

FAS 2704(OLD-50)

Poor

Over: RACCOON CREEK

2.5 MI W JCT US-45N, Clay, IL

Built 1993 Load: 24.3 t ADT: 1,400

TR-229

Poor

Over: BIG MUDDY CREEK

4.5 MI E SAILOR SPRI, Clay, IL

Built 1980 Load: 24.3 t ADT: 75

NEW LEBANON RD

Poor

Over: COON CREEK

3460N 1790E, DeKalb, IL

Built 1969 Load: 24.3 t ADT: 100

Fox Lane

Poor

Over: Salt Creek

.01 M W Salt Crk. Ln, DuPage, IL

Built 1976 Load: 24.3 t ADT: 650

TR-587A (PUB ROAD)

Poor

Over: WILDCAT DITCH

E CARLYLE GM MGMT AR, Fayette, IL

Built 1973 Load: 24.3 t ADT: 10

BOTTOM RD - TR 288

Poor

Over: SWEGLE CREEK

NE-12-T8NR2E, Fulton, IL

Built 1979 Load: 24.3 t ADT: 50

DuPont Rd/FAS1273

Poor

Over: HOG RUN

SE Sec 30 T33N Range, Grundy, IL

Built 1975 Load: 24.3 t ADT: 775

TR 85

Poor

Over: BRANCH OF BIG CREEK

2.5 MI N E'TOWN, Hardin, IL

Built 1968 Load: 24.3 t ADT: 25

TR 10

Poor

Over: CAMP CREEK

3.0 MI W LYNN CENTER, Henry, IL

Built 1963 Load: 24.3 t ADT: 10

ILL 3

Poor

Over: WORTHEN BAYOU

1.2 MI S OF ILL 149, Jackson, IL

Built 1958 Load: 24.3 t ADT: 900

US 34 FAP 587

Poor

Over: INDIAN CREEK

12.88 MI E OF IL 251, LaSalle, IL

Built 1952 Load: 24.3 t ADT: 2,000

CH-15

Poor

Over: BRANCH RACCOON CREEK

8 MI W ST FRANCISVIL, Lawrence, IL

Built 1972 Load: 24.3 t ADT: 75

WEST BROOKLYN ROAD

Poor

Over: DRAINAGE DITCH

1.0 MI S OF US RT 30, Lee, IL

Built 1983 Load: 24.3 t ADT: 275

CH 12 MAYTOWN RD

Poor

Over: BRANCH OF GREEN RIVE

0.75 MI W MAYTOWN, Lee, IL

Built 1957 Load: 24.3 t ADT: 150

MELUGINS GROVE RD

Poor

Over: BR GREEN RIVER

1.0 MI S REYNOLDS RD, Lee, IL

Built 1970 Load: 24.3 t ADT: 10

TR-272 (PAW PAW RD

Poor

Over: DRY RUN

0.5 MI N OF US 30, Lee, IL

Built 1950 Load: 24.3 t ADT: 50

TR 4

Poor

Over: EAGLE CREEK

3265 N, 100 E, Livingston, IL

Built 1926 Load: 24.3 t ADT: 75

TR 21

Poor

Over: MOON CREEK

165 E, 3050 N, Livingston, IL

Built 1931 Load: 24.3 t ADT: 75

TR 23

Poor

Over: TRIB TO VERMILION R

1140 E, 3050 N, Livingston, IL

Built 1969 Load: 24.3 t ADT: 25

TR 25

Poor

Over: LOCAL DRAINAGE

3.5 MI SE UNION, Logan, IL

Built 1960 Load: 24.3 t ADT: 50

OLD IL 4

Poor

Over: HONEY CREEK

6M S IL108-CARLINVIL, Macoupin, IL

Built 1920 Load: 24.3 t ADT: 20

BUCKEYE RD/ TR 371

Poor

Over: SUGAR CK

2.5MI SE HIGHLAND, Madison, IL

Built 1971 Load: 24.3 t ADT: 300

TR 95A (TH-D12)

Poor

Over: SENACHWINE CREEK

T12N-R9E-4PM SEC 32, Marshall, IL

Built 1977 Load: 24.3 t ADT: 50

TR 436

Poor

Over: SUGAR CREEK

S.CTR-35-T4NR1W, McDonough, IL

Built 1900 Load: 24.3 t ADT: 25

TAYLOR STREET

Poor

Over: BRANCH MONEY CREEK

E EDGE OF TOWANDA, McLean, IL

Built 1972 Load: 24.3 t ADT: 150

TR 37

Poor

Over: CONCORD CREEK

3 MI N PETERSBURG, Menard, IL

Built 1977 Load: 24.3 t ADT: 50

FAS 625

Poor

Over: SUGAR CREEK

1.0 S OF AUBURN, Sangamon, IL

Built 1956 Load: 24.3 t ADT: 1,000

TR 65

Poor

Over: STREAM

NE COR-34-T25NR3W, Tazewell, IL

Built 1961 Load: 24.3 t ADT: 50

TR 401

Poor

Over: STREAM

4.5 MI E GEORGETOWN, Vermilion, IL

Built 1900 Load: 24.3 t ADT: 50

Showing 26,151-26,200 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.