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

HENDERSON AVE

Poor

Over: SPRING CR

0.25 MI N JACKSON ST, Will, IL

Built 1925 Load: 24.3 t ADT: 2,350

TR 201 A

Poor

Over: KASKASKIA DITCH

1.7 MI SE BONDVILLE, Champaign, IL

Built 1972 Load: 24.6 t ADT: 450

TR-398

Poor

Over: BRANCH LT WABASH RIV

7.5 MI SE CLAY CITY, Clay, IL

Built 1978 Load: 24.6 t ADT: 25

FAS-807 (CH-6)

Poor

Over: LITTLE BONPAS CREEK

4 MI S SUMNER, Lawrence, IL

Built 1939 Load: 24.6 t ADT: 1,100

TR 218

Poor

Over: LOCAL DRAINAGE

2 E 2.5 MI S LAKE FK, Logan, IL

Built 1968 Load: 24.6 t ADT: 25

NORTH UNION ROAD

Poor

Over: KISHWAUKEE RIVER

0.3 MI W OF IL 47, McHenry, IL

Built 1959 Load: 24.6 t ADT: 875

TR 490

Poor

Over: FLINT CREEK

SO C.L. VALLEY CITY, Pike, IL

Built 1986 Load: 24.6 t ADT: 50

TR-141 (FURROW RD)

Poor

Over: LOST CREEK

N.CTR-36-T24NR5W, Tazewell, IL

Built 1961 Load: 24.6 t ADT: 200

TR 235C

Poor

Over: COAL CREEK

3 MI E OF MINERAL, Bureau, IL

Built 1925 Load: 24.9 t ADT: 10

TR 307

Poor

Over: WILLOW CREEK

1.5 SE MORRISONVILLE, Christian, IL

Built 1900 Load: 24.9 t ADT: 35

I-290 IKE,CONGRESS

Poor

Over: THRU POST OFFICE

0.3 M E I-90&94, Cook, IL

Built 1954 Load: 24.9 t ADT: 80,900

TR 99

Poor

Over: LA HARPE

4.5 MI S LAHARPE, Hancock, IL

Built 1974 Load: 24.9 t ADT: 50

TR 276

Poor

Over: COON CREEK

1.5 SE WOODLAND, Iroquois, IL

Built 1916 Load: 24.9 t ADT: 25

TR 44A

Poor

Over: TRIB LANGAN CREEK

5MI W CLIFTON N .25, Iroquois, IL

Built 1956 Load: 24.9 t ADT: 50

FAS 1919-CH 30

Poor

Over: INDIAN CREEK

NE CORN.SEC10-10-1, Jackson, IL

Built 1982 Load: 24.9 t ADT: 1,300

REIDER TR 222

Poor

Over: ENGEL CREEK

0.75 MI N US 50, St. Clair, IL

Built 1981 Load: 24.9 t ADT: 400

IL 29

Poor

Over: MACKINAW RIVER TRIB

0.25 MI N MACKINAW R, Tazewell, IL

Built 1963 Load: 24.9 t ADT: 2,250

CH 27

Poor

Over: WILLOW CREEK

3.5 MI NW NASHVILLE, Washington, IL

Built 1960 Load: 24.9 t ADT: 575

TR 102

Poor

Over: BR WILLIAMS CR

3.25 SE PLUM HILL, Washington, IL

Built 1920 Load: 24.9 t ADT: 50

CH 7

Poor

Over: BEAUCOUP CREEK

1.5 MI E OF POSEN, Washington, IL

Built 1977 Load: 24.9 t ADT: 150

TR 175

Poor

Over: PRAIRIE BRANCH

2 MI NE HOFFMANN, Clinton, IL

Built 1940 Load: 25.3 t ADT: 300

TR 198/LADUE ROAD

Poor

Over: COLES CREEK

.5 MI S. EAST FORK T, Clinton, IL

Built 1901 Load: 25.3 t ADT: 25

TR-229

Poor

Over: STINKING CREEK

7 MI W GRAYVILLE, Edwards, IL

Built 1977 Load: 25.3 t ADT: 50

CH 18 BUCKINGHAM R

Poor

Over: STREAM

3630N,1600E, Ford, IL

Built 1964 Load: 25.3 t ADT: 50

OWENS RD - TR 95

Poor

Over: BR COPPERAS CREEK

NE-1-T7NR4E, Fulton, IL

Built 1973 Load: 25.3 t ADT: 75

RESERVATION/FAU251

Poor

Over: MORGAN CK

2 MI W OF CH 16, Kendall, IL

Built 1980 Load: 25.3 t ADT: 1,150

US 6

Poor

Over: N. KICKAPOO CR

8.39 MI E OF ILL 71, LaSalle, IL

Built 1980 Load: 25.3 t ADT: 2,850

FAS 1808/FR 550

Poor

Over: STREAM

JCT SBI-12 & US-50B, Lawrence, IL

Built 1925 Load: 25.3 t ADT: 25

MILLER RD

Poor

Over: GREEN RIVER TRIB

1.0 MI S OF US 30, Lee, IL

Built 1975 Load: 25.3 t ADT: 25

CH 37 SUGAR GROVE

Poor

Over: REID CREEK

1.0 MI S OGLE CO L, Lee, IL

Built 1961 Load: 25.3 t ADT: 175

TR 79B

Poor

Over: SOUTHERN PACIFIC RR

1990 E, 2400 N, Livingston, IL

Built 1988 Load: 25.3 t ADT: 150

TR 38

Poor

Over: PRAIRIE CK

4 S 3 MI E SAN JOSE, Logan, IL

Built 1954 Load: 25.3 t ADT: 50

LONG CR RD(MS 5000

Poor

Over: LONG CREEK

CITY OF LONG CREEK, Macon, IL

Built 1969 Load: 25.3 t ADT: 1,250

ILL 9

Poor

Over: STREAM

15 MI E OF BISN 55, McLean, IL

Built 1925 Load: 25.3 t ADT: 2,100

MS-1070 Seward St

Poor

Over: Ditch

HILLSBORO, Montgomery, IL

Built 1920 Load: 25.3 t ADT: 1,350

ILL 8

Poor

Over: TRIB OF KICKAPOO CR

IN POTTSTOWN, Peoria, IL

Built 1991 Load: 25.3 t ADT: 1,650

SWITZER ROAD

Poor

Over: BR.OF KICKAPOO CREEK

ELINENE1/4 4T9NR6E, Peoria, IL

Built 1983 Load: 25.3 t ADT: 100

BLUE GOOSE RD

Poor

Over: DEER CREEK

6 MI S.E. MORRISON, Whiteside, IL

Built 1972 Load: 25.3 t ADT: 25

MADISON ST

Poor

Over: MILNE CRK

BET. 7TH E8TH STREET, Will, IL

Built 1978 Load: 25.3 t ADT: 1,900

TOWNSHIP ROAD 317

Poor

Over: BR OF BUREAU CREEK

1.5 M NW TISKILWA, Bureau, IL

Built 1979 Load: 25.6 t ADT: 50

FAU 7123(IL 10)

Poor

Over: COPPER SLOUGH

W EDGE OF CHAMPAIGN, Champaign, IL

Built 1940 Load: 25.6 t ADT: 12,100

ILL 115

Poor

Over: DRAINAGE DITCH

3.66 MI S OF ILL 116, Ford, IL

Built 1981 Load: 25.6 t ADT: 675

2ND STREET

Poor

Over: RAILROAD CREEK

CITY OF HAMILTON, Hancock, IL

Built 1974 Load: 25.6 t ADT: 150

TR 263

Poor

Over: TRIB TO SPOON RIVER

NW-24-T10NR3E, Knox, IL

Built 1983 Load: 25.6 t ADT: 50

TR-332

Poor

Over: COVEL CREEK

E 20TH N 2440, LaSalle, IL

Built 1970 Load: 25.6 t ADT: 50

US RTE 24

Poor

Over: STREAM

2.8 M W OF ILL 115, Livingston, IL

Built 1951 Load: 25.6 t ADT: 2,150

NEW HOLLAND-SAN JO

Poor

Over: PRAIRIE CK

4 MI N NEW HOLLAND, Logan, IL

Built 1961 Load: 25.6 t ADT: 150

MS-3020 Center St

Poor

Over: Stream

.7MI SW ROBERTS RD, McHenry, IL

Built 1991 Load: 25.6 t ADT: 575

OLD US 36

Poor

Over: WALNUT CREEK

1 MI N WINCHESTER, Scott, IL

Built 1940 Load: 25.6 t ADT: 2,750

TR 209

Poor

Over: E. BUREAU CR.

1 MI. S. OF MALDEN, Bureau, IL

Built 1960 Load: 25.9 t ADT: 150

Showing 26,201-26,250 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.