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

FAU 8153

Fair

Over: PANTHER CREEK

2.0 SE CHATHAM, Sangamon, IL

Built 1970 Load: 22.7 t ADT: 250

MILL ST

Fair

Over: BLACK BRANCH

MILL ST IN ROCHESTER, Sangamon, IL

Built 1930 Load: 22.7 t ADT: 75

ILES AVE

Fair

Over: STREAM

ILES @ CHATHAM RD, Sangamon, IL

Built 1970 Load: 22.7 t ADT: 1,750

FAS 1631(CH 9)

Fair

Over: DRAKE CREEK

6 MI E OF STRASBURG, Shelby, IL

Built 1958 Load: 22.7 t ADT: 325

FAS 1631(CH 9)

Fair

Over: STREAM

2.2 MI N TROWBRIDGE, Shelby, IL

Built 1958 Load: 22.7 t ADT: 350

Shelbyville Dam

Fair

Over: Lake Shelbyville

Shelbyville, IL, Shelby, IL

Built 1970 Load: 22.7 t ADT: 900

DOUGLAS ST/ FAU 92

Fair

Over: RICHLAND CREEK

BELLEVILLE, St. Clair, IL

Built 1948 Load: 22.7 t ADT: 3,600

BROADWAY RD

Fair

Over: BULL RUN CREEK

SE COR-32-T24NR3W, Tazewell, IL

Built 1954 Load: 22.7 t ADT: 2,050

FAU 6699

Fair

Over: STREAM

NE-5-T25NR4W, Tazewell, IL

Built 1954 Load: 22.7 t ADT: 2,350

MS#6470A

Fair

Over: BULL RUN CREEK

NE COR-5-T24NR3W, Tazewell, IL

Built 1963 Load: 22.7 t ADT: 950

TR 260

Fair

Over: STREAM

SE-12-T22NR3W, Tazewell, IL

Built 1955 Load: 22.7 t ADT: 75

TR 253A

Fair

Over: STREAM

NE COR-4-T22NR3W, Tazewell, IL

Built 1948 Load: 22.7 t ADT: 10

TR 257

Fair

Over: STREAM

SE-1-T22NR3W, Tazewell, IL

Built 1950 Load: 22.7 t ADT: 75

TR 236A

Fair

Over: CYPRESS CK

.6 M N CH 11, Union, IL

Built 1984 Load: 22.7 t ADT: 25

TR 176

Fair

Over: STREAM

4 MI NW ROSSVLE, Vermilion, IL

Built 1968 Load: 22.7 t ADT: 50

TR 482

Fair

Over: EAST BRANCH

6 MI SE ROSSVILLE, Vermilion, IL

Built 1960 Load: 22.7 t ADT: 75

TR 725 A

Fair

Over: GRAPE CREEK

1 MI E OF BELGIUM, Vermilion, IL

Built 1964 Load: 22.7 t ADT: 50

FAS-883

Fair

Over: BEAR CREEK

1 MI W NORRIS CITY, White, IL

Built 1952 Load: 22.7 t ADT: 1,150

FULFS RD

Fair

Over: ELKHORN CREEK

3 MI NO OF STERLING, Whiteside, IL

Built 1964 Load: 22.7 t ADT: 600

BLUE GOOSE RD

Fair

Over: COUNTY DITCH NO. 1

3.5 MI NW TAMPICO, Whiteside, IL

Built 1971 Load: 22.7 t ADT: 25

ROMEOVILLE RD

Fair

Over: ILL & MICH CANAL

1.2 MI E ILL 53, Will, IL

Built 1953 Load: 22.7 t ADT: 14,200

CHERRY HILL RD

Fair

Over: JACKSON CR

0.6M N.MAN-ELWOOD RD, Will, IL

Built 1900 Load: 22.7 t ADT: 775

FAS 904

Fair

Over: CRAB ORCHARD CREEK

0.67 MI SO PITTSBURG, Williamson, IL

Built 1972 Load: 22.7 t ADT: 2,850

BEST RD

Fair

Over: S BR OTTER CREEK

0.5 MI N DURAND RD, Winnebago, IL

Built 1955 Load: 22.7 t ADT: 3,000

PATTERSON ROAD

Fair

Over: N BR OTTER CREEK

0.5 MI S ROCK GROVE, Winnebago, IL

Built 1968 Load: 22.7 t ADT: 225

ALPINE RD

Fair

Over: SPRING CREEK

0.1 MI S OF SPRG CK, Winnebago, IL

Built 1955 Load: 22.7 t ADT: 20,900

MARSHALL ST

Fair

Over: S.E. DRAINAGEWAY

0.05 MI S HARRISON, Winnebago, IL

Built 1966 Load: 22.7 t ADT: 575

CHESTERFIELD AVE

Fair

Over: UNNAMED DRAIN. DITCH

0.01 MI N SAMUELSON, Winnebago, IL

Built 1965 Load: 22.7 t ADT: 300

TR 61

Fair

Over: THURMAN CRK.

0.8 MI E LORAINE, Adams, IL

Built 1969 Load: 23.0 t ADT: 100

TR 0085

Fair

Over: CROOKED CREEK

3.8 MI W GOLDEN, Adams, IL

Built 1970 Load: 23.0 t ADT: 50

CH 10/FAS 782

Fair

Over: AVERY BRANCH

3M S MULBERRY GROVE, Bond, IL

Built 1957 Load: 23.0 t ADT: 475

TR 41

Fair

Over: WALNUT DITCH

0.5 MI S OF WALNUT, Bureau, IL

Built 1967 Load: 23.0 t ADT: 200

E FAIRHAVEN ROAD

Fair

Over: LITTLE ROCK CREEK

5 MI SW CHADWICK, Carroll, IL

Built 1963 Load: 23.0 t ADT: 100

CH10-FAS 732

Fair

Over: S. FORK SANGAMON R.

7.75 M E MORRISONVIL, Christian, IL

Built 1956 Load: 23.0 t ADT: 450

TR-342

Fair

Over: CREEK

5.5 MI S CLAY CITY, Clay, IL

Built 1961 Load: 23.0 t ADT: 50

FAS 676(CH 5)

Fair

Over: W BR HURRICANE CREEK

.5 MI W HUTTON, Coles, IL

Built 1941 Load: 23.0 t ADT: 200

FAS 667(CH 7)

Fair

Over: DRAINAGE DITCH

1 MI W OF I-57, Coles, IL

Built 1970 Load: 23.0 t ADT: 3,550

IL 72 & UP RR

Fair

Over: HIGGINS CREEK

2.9 M W US 45, Cook, IL

Built 1931 Load: 23.0 t ADT: 31,500

US 6 (159TH)

Fair

Over: ALONG US 6 EB LANES

FROM I57 TO I294, Cook, IL

Built 1962 Load: 23.0 t ADT: 25,100

FAP-332 (ILL-1)

Fair

Over: BR LAMOTTE CREEK

3 MI S ILL-33, Crawford, IL

Built 1962 Load: 23.0 t ADT: 4,100

W. COUNTY LINE RD

Fair

Over: RICKELSON CREEK

1330N 00E, DeKalb, IL

Built 1956 Load: 23.0 t ADT: 475

TR 298

Fair

Over: STREAM

0.25 MI S OF HUNTER, Edgar, IL

Built 1940 Load: 23.0 t ADT: 75

TR 68

Fair

Over: EAST DONICA CREEK

1.5 MI NNE OF KANSAS, Edgar, IL

Built 1971 Load: 23.0 t ADT: 50

TR 21

Fair

Over: STREAM

0.75 MI W OF QUAKER, Edgar, IL

Built 1971 Load: 23.0 t ADT: 50

TR 231

Fair

Over: STREAM

3 MI NE VERMILION, Edgar, IL

Built 1974 Load: 23.0 t ADT: 50

PEACH ORCHARD TR 6

Fair

Over: THE BIG FOUR

930 E 1100N, Ford, IL

Built 1971 Load: 23.0 t ADT: 25

TR 46

Fair

Over: LARRY CREEK

6.0 S NAUVOO, Hancock, IL

Built 1969 Load: 23.0 t ADT: 50

TR 210

Fair

Over: HENDERSON CR

NW-25-T10NR4W, Henderson, IL

Built 1971 Load: 23.0 t ADT: 25

TR 340

Fair

Over: IROQUOIS RIVER

1.25 MI N. US 24, Iroquois, IL

Built 1912 Load: 23.0 t ADT: 200

TR-343

Fair

Over: Trib. to Mud Creek

3 MI E. ILL RTE 1, Iroquois, IL

Built 1965 Load: 23.0 t ADT: 50

Showing 4,951-5,000 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.