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

TR-502

Fair

Over: TRIB LONE GROVE BR

1.5 MI N ST PETER, Fayette, IL

Built 1930 Load: 24.3 t ADT: 100

TR-571B

Fair

Over: PLUM CREEK

4 MI SE SHOBONIER, Fayette, IL

Built 1909 Load: 24.3 t ADT: 75

FAS-651

Fair

Over: LITTLE CREEK

4.5 MI N RAMSEY, Fayette, IL

Built 1920 Load: 24.3 t ADT: 125

FAS-712

Fair

Over: SMALL UNNAMED BRANCH

10.1 MI E RAMSEY, Fayette, IL

Built 1941 Load: 24.3 t ADT: 425

FAS-717 (CH-23)

Fair

Over: TRIB CASSER CREEK

0.8 MI E SHOBONIER, Fayette, IL

Built 1931 Load: 24.3 t ADT: 450

FAS-721 (CH-1)

Fair

Over: TRIB HURRICANE CREEK

1 MI W BINGHAM, Fayette, IL

Built 1932 Load: 24.3 t ADT: 450

FAS-712

Fair

Over: LITTLE MOCCASIN CR

1.5 MI E WRIGHTS CN, Fayette, IL

Built 1950 Load: 24.3 t ADT: 50

FAS-716

Fair

Over: TRIB BIG RILEY RUN

1 MI S WRIGHTS CONER, Fayette, IL

Built 1949 Load: 24.3 t ADT: 750

TR-6

Fair

Over: BEAR CREEK

2.5 MI W VERNON, Fayette, IL

Built 1909 Load: 24.3 t ADT: 75

TR 75 GARBER RD

Fair

Over: DRUMMER CREEK

310E,800N, Ford, IL

Built 1960 Load: 24.3 t ADT: 250

TR 13 MONA

Fair

Over: KELLY CR

1460E,3200N, Ford, IL

Built 1965 Load: 24.3 t ADT: 50

TR 14 DRUMMER

Fair

Over: DRUMMER CREEK

430E-080N, Ford, IL

Built 1964 Load: 24.3 t ADT: 25

TR 79A DIX

Fair

Over: THE BIG FOUR

1120E,700N, Ford, IL

Built 1963 Load: 24.3 t ADT: 50

TR 89 DRUMMER

Fair

Over: DRUMMER CREEK

370E,550N, Ford, IL

Built 1966 Load: 24.3 t ADT: 325

TR 105 DRUMMER

Fair

Over: DICKERSON SLOUGH

570E,200N, Ford, IL

Built 1968 Load: 24.3 t ADT: 75

TR 9 MONA

Fair

Over: KELLY CREEK

1480E,3500N, Ford, IL

Built 1971 Load: 24.3 t ADT: 25

FAS 452-CH 2

Fair

Over: BRANCH OF SWEGLE

E1/2-4-T8NR2E, Fulton, IL

Built 1952 Load: 24.3 t ADT: 475

TR 156

Fair

Over: COAL CREEK

1.7 MI NE ELLISVILLE, Fulton, IL

Built 1925 Load: 24.3 t ADT: 10

CYPRESS RD - TR 11

Fair

Over: COPPERAS CR

E-13-T7NR4, Fulton, IL

Built 1970 Load: 24.3 t ADT: 175

COAL HOLLOW RD-TR3

Fair

Over: COAL CREEK

NE-15-T8NR3E, Fulton, IL

Built 1977 Load: 24.3 t ADT: 50

DUTCH HENRY RD-TR4

Fair

Over: STREAM

NW-33-T5NR3E, Fulton, IL

Built 1978 Load: 24.3 t ADT: 75

FAS 447 - CH 17

Fair

Over: SAND CREEK

N.CTR-3-T7NR1E, Fulton, IL

Built 1950 Load: 24.3 t ADT: 350

FAS 447 - CH 17

Fair

Over: CREEK

NE-2-T7NR1E, Fulton, IL

Built 1950 Load: 24.3 t ADT: 350

COUNTY HIGHWAY 4

Fair

Over: BIG SISTER

SW-5-T5NR4E, Fulton, IL

Built 1959 Load: 24.3 t ADT: 75

COUNTY HIGHWAY 26

Fair

Over: CREEK

NW-20-T8NR2E, Fulton, IL

Built 1953 Load: 24.3 t ADT: 50

RANDOLPH RD - TR 1

Fair

Over: PUT CREEK

S.CTR-13-T7NR3E, Fulton, IL

Built 1900 Load: 24.3 t ADT: 75

GORSUCH HWY - TR 5

Fair

Over: KERTON CREEK

NW-14-T3NR2E, Fulton, IL

Built 1945 Load: 24.3 t ADT: 25

TR 300

Fair

Over: BEAR CREEK

3.6 M N GREENFIELD, Greene, IL

Built 1915 Load: 24.3 t ADT: 25

FAS 738

Fair

Over: STREAM

1.5 MI NE HILLVIEW, Greene, IL

Built 1940 Load: 24.3 t ADT: 400

TR 8A

Fair

Over: DRAINAGE DITCH

6.2 MI. S. ELDRED, Greene, IL

Built 1901 Load: 24.3 t ADT: 10

TR 256

Fair

Over: STREAM

7M EAST WHITEHALL, Greene, IL

Built 1958 Load: 24.3 t ADT: 50

TR 7

Fair

Over: LICK CREEK

4.5 MI N. ATHENSVILL, Greene, IL

Built 1970 Load: 24.3 t ADT: 75

TYNAN ROAD CH C41

Fair

Over: MAZON RIVER

0.45 N. Bracville Rd, Grundy, IL

Built 1962 Load: 24.3 t ADT: 650

TR-103 O'MALLEY RD

Fair

Over: TRIB TO HOG RUN

.05 MI E BENNETT RD, Grundy, IL

Built 1964 Load: 24.3 t ADT: 175

TR 107 WAUPECAN RD

Fair

Over: TRIB TO HOG RUN

.25 MI E KINSMAN RD, Grundy, IL

Built 1966 Load: 24.3 t ADT: 50

O'MALLEY RD TR-103

Fair

Over: BILLS RUN

.27 MI W BUFFALO RD, Grundy, IL

Built 1958 Load: 24.3 t ADT: 50

FAS-882

Fair

Over: FERGUSON CREEK

1.75 MI W BLAIRSVILL, Hamilton, IL

Built 1936 Load: 24.3 t ADT: 1,350

FAS-881

Fair

Over: TRIB BROUGHTON LAT

1.25 MI W BROUGHTON, Hamilton, IL

Built 1962 Load: 24.3 t ADT: 375

TR 57

Fair

Over: TYSON CREEK

3.0 MI S NIOTA, Hancock, IL

Built 1967 Load: 24.3 t ADT: 75

FAS 1425

Fair

Over: BEAR CREEK

1 MI S OF BASCO, Hancock, IL

Built 1970 Load: 24.3 t ADT: 150

TR 214A

Fair

Over: LONG CREEK

3.7 NE CARTHAGE, Hancock, IL

Built 1973 Load: 24.3 t ADT: 75

TR 57

Fair

Over: TILTON CREEK

1.5 MI SW DURHAM, Hancock, IL

Built 1918 Load: 24.3 t ADT: 50

TR 52

Fair

Over: BIG CREEK

3.5 MI S KARBER RG, Hardin, IL

Built 1951 Load: 24.3 t ADT: 25

FAS 1934

Fair

Over: STREAM

3 MI NORTHE'TOWN, Hardin, IL

Built 1955 Load: 24.3 t ADT: 325

I 74

Fair

Over: CAMP CREEK

.25MI N 1200N, Henry, IL

Built 1966 Load: 24.3 t ADT: 14,800

TR 6-A

Fair

Over: BR. OF COAL CREEK

4.0 MI NW ORION, Henry, IL

Built 1910 Load: 24.3 t ADT: 50

TR 130

Fair

Over: EDWARDS RIVER

4.0 MI SW CAMBRIDGE, Henry, IL

Built 1924 Load: 24.3 t ADT: 50

W ELK STREET

Fair

Over: GENESEO CREEK

NW CORNER OF GENESEO, Henry, IL

Built 1938 Load: 24.3 t ADT: 550

FAS 1335 CH 42

Fair

Over: TRIB LITTLE MUD CR

1.2MI N JCT CH44+42, Iroquois, IL

Built 1925 Load: 24.3 t ADT: 150

TR 2C

Fair

Over: BEAVER CR

ILL-IND STATE LN, Iroquois, IL

Built 1968 Load: 24.3 t ADT: 100

Showing 5,301-5,350 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.