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 88

Fair

Over: STREAM

0.1 MI N POPE CO, Saline, IL

Built 1900 Load: 18.5 t ADT: 25

CH 40

Fair

Over: RICHLAND CREEK

3.0 SE OF COWDEN, Shelby, IL

Built 1923 Load: 18.5 t ADT: 150

FAS-800

Fair

Over: CRAWFISH LATERAL

0.5 MI E GREATHOUSE, Wabash, IL

Built 1940 Load: 18.5 t ADT: 525

US 45,52

Fair

Over: S BR FORKED CREEK

1.0 M S OF US 52, Will, IL

Built 1968 Load: 18.5 t ADT: 6,450

TR 91

Fair

Over: PARTRIDGE CR

3 MI NW METAMORA, Woodford, IL

Built 1937 Load: 18.5 t ADT: 50

CH-12 (FAS-732)

Fair

Over: LAKE FORK

3 MI W PANA, Christian, IL

Built 1940 Load: 18.8 t ADT: 500

TR 199

Fair

Over: TRIB OF MILL CREEK

0.9 M NE OF ELSAH, Jersey, IL

Built 1970 Load: 18.8 t ADT: 75

WELTER ROAD

Fair

Over: VIRGIL DR DITCH NO.2

1.0 MI S VIRGIL, Kane, IL

Built 1949 Load: 18.8 t

RED BRICK RD

Fair

Over: THREE MILE BRANCH

0.5 MI S OF US 52, Lee, IL

Built 1961 Load: 18.8 t ADT: 225

FAI-55 SB

Fair

Over: ROOKS CREEK

3 MI SW OF PONTIAC, Livingston, IL

Built 1972 Load: 18.8 t ADT: 10,500

FAI-55 NB

Fair

Over: ROOKS CREEK

3 MI SW OF PONTIAC, Livingston, IL

Built 1972 Load: 18.8 t ADT: 10,500

TR 234A(ESTHER RD)

Fair

Over: STREAM

1.8 M SE DECATUR AIR, Macon, IL

Built 1960 Load: 18.8 t ADT: 75

IL 140

Fair

Over: Sugar Fork

0.25mi E of Alhambra, Madison, IL

Built 1930 Load: 18.8 t ADT: 2,450

FAS 1434 - CH 11

Fair

Over: E FORK LAMOINE RIVER

N.CTR-15-T5NR4W, McDonough, IL

Built 1953 Load: 18.8 t ADT: 450

MENSCHING RD

Fair

Over: KISHWAUKEE RIVER

6.0 S OF WOODSTOCK, McHenry, IL

Built 1985 Load: 18.8 t ADT: 125

TR 223

Fair

Over: BRANCH MACKINAW RV

3.5 MI SE ANCHOR, McLean, IL

Built 1971 Load: 18.8 t ADT: 25

TR 496

Fair

Over: HENLINE DITCH

4.5 MI NW COLFAX, McLean, IL

Built 1971 Load: 18.8 t ADT: 75

HOLCOMB RD

Fair

Over: BRANCH STILLMAN CR

6.0 MI SE BYRON, Ogle, IL

Built 1959 Load: 18.8 t ADT: 225

TR 285

Fair

Over: BROWN CREEK

2.0 MI SW EL DARA, Pike, IL

Built 1950 Load: 18.8 t ADT: 25

TR 212

Fair

Over: JORDAN CREEK

3.4 MI W CLARKSBURG, Shelby, IL

Built 1909 Load: 18.8 t ADT: 175

FAS 463 - 5TH ST

Fair

Over: LOST CREEK

SE-22-T24NR4W, Tazewell, IL

Built 1957 Load: 18.8 t ADT: 1,200

JUDD ROAD

Fair

Over: UNNAMED CREEK

0.1 MI S CAMPBELL RD, Winnebago, IL

Built 1956 Load: 18.8 t ADT: 10

TR 244

Fair

Over: BRUSHY BRANCH

5MI W ASSUMPTION, Christian, IL

Built 1917 Load: 19.1 t ADT: 50

TR 18

Fair

Over: STREAM

3 MI N MORRISONVILLE, Christian, IL

Built 1940 Load: 19.1 t ADT: 100

TR 46

Fair

Over: LAKE FORK

2.8 MI SE ASSUMPTION, Christian, IL

Built 1951 Load: 19.1 t ADT: 150

FAP-828 (CC-MONT B

Fair

Over: LITTLE MUDDY CREEK

3.25 MI N CLAY CITY, Clay, IL

Built 1957 Load: 19.1 t ADT: 1,600

FAS-1709 (CH-8)

Fair

Over: GREEN CREEK

1 MI W ST MARY'S, Effingham, IL

Built 1977 Load: 19.1 t ADT: 375

TR 30A DIX

Fair

Over: STREAM

220N,800E, Ford, IL

Built 1965 Load: 19.1 t ADT: 25

FAS 446-CH 15

Fair

Over: SHAW CREEK

SE-33-T7NR1E, Fulton, IL

Built 1938 Load: 19.1 t ADT: 450

TOWNSHIP RD NO 143

Fair

Over: MUD CREEK

4.0 MI E ATKINSON, Henry, IL

Built 1940 Load: 19.1 t ADT: 75

RAMM ROAD

Fair

Over: VIRGIL DR DITCH NO.3

1.5 MI N VIRGIL, Kane, IL

Built 1949 Load: 19.1 t ADT: 1,600

CH 32

Fair

Over: PIKE CR

1.2 MI E GRANT PARK, Kankakee, IL

Built 1950 Load: 19.1 t ADT: 200

TR 287

Fair

Over: HAW CREEK

NW-36-T10NR2E, Knox, IL

Built 1968 Load: 19.1 t ADT: 25

TR 205

Fair

Over: CROOKED LEG CR

N 36TH E 1790, LaSalle, IL

Built 1965 Load: 19.1 t ADT: 150

13TH STREET

Fair

Over: CONRAIL RR

ST FRANCISVILLE, Lawrence, IL

Built 1909 Load: 19.1 t ADT: 125

HARMON RD

Fair

Over: GREEN RIVER

6 MI S HARMON, Lee, IL

Built 1946 Load: 19.1 t ADT: 150

TR 233

Fair

Over: LAKE FK CK TRIB

1.5 N 1 MI W CORNLND, Logan, IL

Built 1961 Load: 19.1 t ADT: 50

NIEHAUS RD/ TR 326

Fair

Over: SILVER CREEK

2.5 MI E OF LIVINGST, Madison, IL

Built 1901 Load: 19.1 t

FAS-481 (CH-32)

Fair

Over: Sugar Creek

1.2 MI NNW SHIRLEY, McLean, IL

Built 1975 Load: 19.1 t ADT: 900

TR 384

Fair

Over: CREEK

1.5 M E PRENTICE, Morgan, IL

Built 1966 Load: 19.1 t ADT: 100

FAS 2599

Fair

Over: WALNUT CREEK

2.1M W IL 96, Pike, IL

Built 1947 Load: 19.1 t ADT: 300

TR-37A

Fair

Over: MURPHY CREEK

0.5 MI SE STRINGTOWN, Richland, IL

Built 1924 Load: 19.1 t ADT: 25

CH 6(FAS 653)

Fair

Over: BRUSH CREEK

4 MI W STEWARDSON, Shelby, IL

Built 1948 Load: 19.1 t ADT: 750

I- 80 EB

Fair

Over: ROCK RUN CREEK

0.6 M E OF I-55, Will, IL

Built 1963 Load: 19.1 t ADT: 20,400

I- 80 WB

Fair

Over: ROCK RUN CREEK

0.6 M E OF I-55, Will, IL

Built 1963 Load: 19.1 t ADT: 20,400

ROCK GROVE RD

Fair

Over: N. BR. OTTER CREEK

.25 MI E BEST ROAD, Winnebago, IL

Built 1988 Load: 19.1 t ADT: 425

AUBURN RD

Fair

Over: UNNAMED CREEK

2 MI NE OF WINNEBAGO, Winnebago, IL

Built 1936 Load: 19.1 t ADT: 1,250

TR 71, TR 244

Fair

Over: DRAINAGE DITCH

1 MI NE WOODFORD, Woodford, IL

Built 1991 Load: 19.1 t ADT: 50

COURT ST

Fair

Over: TRIB W BR PANTHER CR

COURT ST W OF MONROE, Woodford, IL

Built 1955 Load: 19.1 t ADT: 225

TR 367

Fair

Over: Walnut Fork Creek

3.25 MI W KELLERVILL, Adams, IL

Built 1939 Load: 19.4 t ADT: 75

Showing 4,451-4,500 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.