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

CH 43E (CH 24)

Poor

Over: PRAIRIE CK

5 MI S SAN JOSE, Logan, IL

Built 1987 Load: 36.3 t ADT: 50

CH 21 STAUNTON RD

Poor

Over: WENDELL BR

1.3MI N TROY, Madison, IL

Built 1968 Load: 36.3 t ADT: 1,000

TR 134

Poor

Over: LA MOINE RIVER

3.0 MI NE OF CAMDEN, Schuyler, IL

Built 1985 Load: 36.3 t ADT: 75

FAU-6732 W Jeffers

Poor

Over: Farm Creek

SE-14-T26NR3W, Tazewell, IL

Built 1980 Load: 36.3 t ADT: 1,700

WINNEBAGO STREET

Poor

Over: KENT CR & RR TRACKS

0.4 MI S OF STATE ST, Winnebago, IL

Built 1982 Load: 36.3 t ADT: 4,900

TR-6A

Poor

Over: CROOKED CREEK

3.5 MI SW IOLA, Clay, IL

Built 1935 Load: 36.6 t ADT: 25

FAP-328 (US-45)

Poor

Over: BIG SALT CREEK

3 MI S ILL-37 JCT, Effingham, IL

Built 1977 Load: 36.6 t ADT: 3,700

WHITEFERRY RD-TR 1

Poor

Over: PUT CREEK

SE-6-T6NR2E, Fulton, IL

Built 1987 Load: 36.6 t ADT: 10

ILL 146

Poor

Over: HOSICK CREEK

1 MI E ELIZABETHTOWN, Hardin, IL

Built 1953 Load: 36.6 t ADT: 1,500

NAYLOR ROAD (TR61)

Poor

Over: CHAMBERLAIN CREEK

1.8 MI. E. OF IL 2, Lee, IL

Built 1992 Load: 36.6 t ADT: 300

TR 92(WOODCOCK RD)

Poor

Over: WILLOW BRANCH

1.75 MI N OF CO LINE, Macon, IL

Built 2003 Load: 36.6 t ADT: 225

FARWELL BRIDGE ROA

Poor

Over: PECATONICA RIVER

3.5 MI NE RIDOTT, Stephenson, IL

Built 1971 Load: 36.6 t ADT: 350

TR 183

Poor

Over: SOUTH FORK CREEK

NE-5-T10NR3W, Warren, IL

Built 1981 Load: 36.6 t ADT: 50

106TH ST

Poor

Over: CALUMET RIVER

3228 E 106TH STREET, Cook, IL

Built 1928 Load: 36.9 t ADT: 6,250

FAS 1449-CH 23

Poor

Over: W BR COPPERAS CR

S1/2-27-T7NR5E, Fulton, IL

Built 1977 Load: 36.9 t ADT: 150

TR-173

Poor

Over: TRIB LOST CREEK DRAI

1.75 MI N DOLAN LAKE, Hamilton, IL

Built 1981 Load: 36.9 t ADT: 50

FAP-327EB (US 50)

Poor

Over: BEAVER POND DITCH

3 MI E LAWRENCEVILLE, Lawrence, IL

Built 1957 Load: 36.9 t ADT: 7,200

FAP-327WB (US-50)

Poor

Over: BEAVER POND DITCH

3 MI E LAWRENCEVILLE, Lawrence, IL

Built 1957 Load: 36.9 t ADT: 7,200

MAYTOWN ROAD

Poor

Over: BRANCH OF BUREAU CR

1.0 M E OF US RT 52, Lee, IL

Built 1982 Load: 36.9 t ADT: 50

CH 13

Poor

Over: BREWSTER CREEK

1.5 M SE NEW CANTON, Pike, IL

Built 2012 Load: 36.9 t ADT: 150

TR 84

Poor

Over: BAY CREEK DITCH

2 MI W HOMBERG, Pope, IL

Built 1986 Load: 36.9 t ADT: 50

COUNTY HWY 50

Poor

Over: MERIDOSIA DITCH

5.5 M E OF CORDOVA, Rock Island, IL

Built 1984 Load: 36.9 t ADT: 250

ILL 146

Poor

Over: CYPRESS CREEK

1 MI W IS 57, Union, IL

Built 1931 Load: 36.9 t ADT: 4,650

HARVEY RD

Poor

Over: ELKHORN CREEK

3.5 MI W OF STERLING, Whiteside, IL

Built 1984 Load: 36.9 t ADT: 50

WALSH RD.

Poor

Over: FORKED CREEK

200' N. WILM. PE. RD, Will, IL

Built 1978 Load: 36.9 t ADT: 50

ILL 251 S B

Poor

Over: UP RR

2.5 MI SOUTH ILL 75, Winnebago, IL

Built 1967 Load: 36.9 t ADT: 13,000

ILL 251 N B

Poor

Over: UP RR

2.5 MI S ILL 75, Winnebago, IL

Built 1967 Load: 36.9 t ADT: 13,000

TR 68

Poor

Over: PRAIRIE CREEK

4MI NE ARENZVILLE, Cass, IL

Built 1978 Load: 37.3 t ADT: 50

I-70 (WB)

Poor

Over: E LITTLE CREEK

2.5 MI E ILL 1, Clark, IL

Built 1968 Load: 37.3 t ADT: 12,450

I-70 (EB)

Poor

Over: E LITTLE CREEK

2.5 MI E ILL 1, Clark, IL

Built 1968 Load: 37.3 t ADT: 12,450

130TH ST

Poor

Over: LITTLE CALUMET RIVER

13000 S. & 2050 E, Cook, IL

Built 1949 Load: 37.3 t ADT: 23,400

HOGE RD TR-13

Poor

Over: TRIB TO NETTLE CREEK

0.06 MI E OF CH 21, Grundy, IL

Built 1976 Load: 37.3 t ADT: 25

IL 78

Poor

Over: DAVIS CREEK

0.5 N CARROLL COUNTY, Jo Daviess, IL

Built 1982 Load: 37.3 t ADT: 600

TR-279 (LOCUST RD)

Poor

Over: DRY RUN CREEK

0.1 MI. N. OF US 30, Lee, IL

Built 1994 Load: 37.3 t ADT: 25

HILLSBORO WALSHVIL

Poor

Over: MIDDLE FK SHOAL CK

1.2 MI W HILLSBORO, Montgomery, IL

Built 1958 Load: 37.3 t ADT: 1,100

46TH AVE DR

Poor

Over: DRAINAGE DITCH

E OF 16 ST SOUTHPARK, Rock Island, IL

Built 1973 Load: 37.3 t ADT: 1,600

SCIENCE RIDGE ROAD

Poor

Over: SPRING CREEK

3 MI NW STERLING, Whiteside, IL

Built 1983 Load: 37.3 t ADT: 450

BRUCE ST

Poor

Over: FRACTION RUN

1.7 MI E IL 171, Will, IL

Built 1968 Load: 37.3 t ADT: 2,400

15TH AVE

Poor

Over: ROCK RIVER

0.01 M E OF MAIN, Winnebago, IL

Built 1980 Load: 37.3 t ADT: 5,750

EMERALD RD

Poor

Over: TRIB TO BEAVER CRK

1570E EMERALD RD, Clinton, IL

Built 1996 Load: 37.6 t ADT: 350

HARLEM AVE NB ILL

Poor

Over: SAN & SHIP CANAL

0.1 M N I55, Cook, IL

Built 1931 Load: 37.6 t ADT: 35,500

TR-9

Poor

Over: CROOKED CREEK

1.5 MI NE PT PLEASAN, Cumberland, IL

Built 1909 Load: 37.6 t ADT: 50

FAS 1420 - CH 6

Poor

Over: ELLISON CREEK

E.CTR-8-T9NR5W, Henderson, IL

Built 1975 Load: 37.6 t ADT: 375

TR 160

Poor

Over: S.HENDERSON CREEK

S.CTR-16-T10NR4W, Henderson, IL

Built 1991 Load: 37.6 t ADT: 50

TR 104

Poor

Over: TRIB PRAIRIE CREEK

2MI E1.5MI N DANFORT, Iroquois, IL

Built 1976 Load: 37.6 t ADT: 75

TR 317

Poor

Over: UNNAMED TRIBUTARY

2.25 M W STOCKLAND, Iroquois, IL

Built 1995 Load: 37.6 t ADT: 50

I 64 WB

Poor

Over: CNIC RR

.5 MI E BELL RIVE IN, Jefferson, IL

Built 1974 Load: 37.6 t ADT: 5,850

WAGNER RD

Poor

Over: BRANCH MUD CREEK

3.5 M NE ADELINE, Ogle, IL

Built 1977 Load: 37.6 t ADT: 25

TR-399

Poor

Over: TR1B CANE CREEK

5.5 MI NW NEW HAVEN, White, IL

Built 1986 Load: 37.6 t ADT: 50

ILL 13 EB

Poor

Over: CRABORCHARD LAKE

1.6 MI E JACKSON CO, Williamson, IL

Built 1964 Load: 37.6 t ADT: 23,500

Showing 26,801-26,850 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.