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 181

Fair

Over: CREEK

4 SW OF HETTICK, Macoupin, IL

Built 1900 Load: 17.5 t ADT: 20

TR 230

Fair

Over: KENT CRK.

4 SW OF CARLINVILLE, Macoupin, IL

Built 1900 Load: 17.5 t ADT: 150

TR 266

Fair

Over: LICK CRK.

4.0 MI NW CARLINVILL, Macoupin, IL

Built 1900 Load: 17.5 t ADT: 20

TR 279

Fair

Over: MACOUPIN CRK.

5MI SW CARLINVILLE, Macoupin, IL

Built 1900 Load: 17.5 t ADT: 50

WAFFLER RD/TR 392

Fair

Over: SPANKER BR

5.0MI SE HIGHLAND, Madison, IL

Built 1920 Load: 17.5 t ADT: 150

ROSE RD/ TR 395

Fair

Over: TRIB TO LITTLE SILVR

3.5 MI S ST JACOB, Madison, IL

Built 1901 Load: 17.5 t ADT: 200

TR 48 SCHUMACHER R

Fair

Over: SPANKER BR

6.1MI S PIERRON, Madison, IL

Built 1942 Load: 17.5 t ADT: 475

KIN LOU RD-FAS 270

Fair

Over: SCHNEIDER SPRINGS BR

1 MI E KINMUNDY, Marion, IL

Built 1909 Load: 17.5 t ADT: 1,100

TR 105

Fair

Over: WHITE OAK CREEK

3.5 MI S HAVANA, Mason, IL

Built 1959 Load: 17.5 t ADT: 50

FAS 417 - CH 11

Fair

Over: LAHARPE CREEK

NE-29-T7NR4W, McDonough, IL

Built 1921 Load: 17.5 t ADT: 350

TR 398

Fair

Over: DRONNING FORK

NW-32-T7NR1W, McDonough, IL

Built 1980 Load: 17.5 t ADT: 50

TR 206

Fair

Over: GRINDSTONE CREEK

E.CTR-29-T4NR3W, McDonough, IL

Built 1920 Load: 17.5 t ADT: 50

TR 430

Fair

Over: WOLFDEN CR

W.CTR-26-T4NR1W, McDonough, IL

Built 1935 Load: 17.5 t ADT: 50

TR 526

Fair

Over: HENLINE DITCH

3.5 MI N COLFAX, McLean, IL

Built 1963 Load: 17.5 t ADT: 50

TR 204

Fair

Over: CAMP CREEK

NE-19-T15NR2W, Mercer, IL

Built 1900 Load: 17.5 t ADT: 25

MAEYSTOWN RD

Fair

Over: MAEYSTOWN CREEK

MAEYSTOWN, Monroe, IL

Built 1881 Load: 17.5 t ADT: 375

TR 267

Fair

Over: HURRICANE CR

3.8 MI NE FILLMORE, Montgomery, IL

Built 1916 Load: 17.5 t ADT: 25

TR 81 B

Fair

Over: TWO MILE BRANCH

3.0 MI N SULLIVAN, Moultrie, IL

Built 1956 Load: 17.5 t ADT: 100

ROME WEST RD

Fair

Over: HICKS HOLLOW CR

N LINE SE1/43T10NR8E, Peoria, IL

Built 1944 Load: 17.5 t ADT: 125

ILL 150

Fair

Over: ROCK FORK CR

1.3 MI.S.OF ILL 154, Perry, IL

Built 1928 Load: 17.5 t ADT: 775

TR 341

Fair

Over: JIMTOWN BRANCH

1.0 MI E ROCKPORT, Pike, IL

Built 1930 Load: 17.5 t ADT: 100

TR 506

Fair

Over: LITTLE BLUE CREEK

2.75MI SE DETROIT, Pike, IL

Built 1961 Load: 17.5 t ADT: 50

TR-61

Fair

Over: GOOSE CREEK

3.25 MI SE DUNDAS, Richland, IL

Built 1909 Load: 17.5 t ADT: 100

CH 19

Fair

Over: COPPERAS CREEK

3 MI SW TAYLOR RIDGE, Rock Island, IL

Built 1950 Load: 17.5 t ADT: 1,750

CH 38(FAS 1632)

Fair

Over: SEXSON BRANCH

0.5 MI W OF SEXSON, Shelby, IL

Built 1938 Load: 17.5 t ADT: 375

TR 191

Fair

Over: STREAM

2.0 MI E TOWERHILL, Shelby, IL

Built 1921 Load: 17.5 t ADT: 25

TR 373

Fair

Over: STREAM

1.7 MI NW COWDEN, Shelby, IL

Built 1909 Load: 17.5 t ADT: 150

TR 76

Fair

Over: STREAM

1.9 MI NE MOWEAQUA, Shelby, IL

Built 1939 Load: 17.5 t ADT: 125

FAS 1632(CH 38)

Fair

Over: W BR LITTLE WABASH R

2 MI W SEXSON CORNER, Shelby, IL

Built 1909 Load: 17.5 t ADT: 375

OLD BALDWIN RD

Fair

Over: LIVELY CREEK

0.30 MI S IL 13, St. Clair, IL

Built 1901 Load: 17.5 t ADT: 675

EAST ANGLE

Fair

Over: COON CREEK

1.0 MI. E. ILL RT.26, Stephenson, IL

Built 1950 Load: 17.5 t ADT: 50

N FLANSBURG ROAD

Fair

Over: BR OF PECATONICA RIV

4.0 MI E OF LENA, Stephenson, IL

Built 1947 Load: 17.5 t ADT: 150

FAIRVIEW ROAD

Fair

Over: BR OF PECATONICA RIV

1.8 MI E ILL RT 26, Stephenson, IL

Built 1952 Load: 17.5 t ADT: 25

PRESTON RD

Fair

Over: BR OF PRESTON CREEK

1.0 MI S OF US RT 20, Stephenson, IL

Built 1941 Load: 17.5 t ADT: 50

OPPOLD RD

Fair

Over: BR PECATONICA RIVER

1.5 MI W ILL RT 26, Stephenson, IL

Built 1935 Load: 17.5 t ADT: 50

CO DIVIDE RD

Fair

Over: BR OF YELLOW CREEK

5.0 MI W OF LENA, Stephenson, IL

Built 1952 Load: 17.5 t ADT: 50

HARTFORD RD - TR 2

Fair

Over: SUGAR CREEK

W.CTR-9-T22NR2W, Tazewell, IL

Built 1966 Load: 17.5 t ADT: 25

CENTER RD - TR 275

Fair

Over: SUGAR CREEK

E.CTR-17-T22NR2W, Tazewell, IL

Built 1963 Load: 17.5 t ADT: 100

RAILSBACK RD-TR 27

Fair

Over: LITTLE MACKINAW R.

S.CTR-7-T23NR2W, Tazewell, IL

Built 1968 Load: 17.5 t ADT: 50

TR 271

Fair

Over: STREAM

NW COR-13-T22NR4W, Tazewell, IL

Built 1962 Load: 17.5 t ADT: 50

FAS 1774 (OLDIL 12

Fair

Over: DRAINAGE DITCH

.2 MI N ARMINGTON RD, Tazewell, IL

Built 1932 Load: 17.5 t ADT: 100

TR 107

Fair

Over: STREAM

2 MI SW ARMSTRONG, Vermilion, IL

Built 1956 Load: 17.5 t ADT: 50

TR 1

Fair

Over: STREAM

1 MI N RANKIN, Vermilion, IL

Built 1916 Load: 17.5 t ADT: 50

SEMINARY (FAU 700

Fair

Over: STONY CREEK

E CENTRAL DANVILLE, Vermilion, IL

Built 1938 Load: 17.5 t ADT: 3,450

TR-133

Fair

Over: DRAINAGE DITCH

0.5 MI E MAUD, Wabash, IL

Built 1909 Load: 17.5 t ADT: 100

TR 108

Fair

Over: BR CROOKED CR

SE-33-T8NR2W, Warren, IL

Built 1916 Load: 17.5 t ADT: 25

TR 237A

Fair

Over: BR OF MUD CREEK

3.5 MI SO.OF ELKTON, Washington, IL

Built 1959 Load: 17.5 t ADT: 100

TR-417

Fair

Over: ELM CREEK

4 MI NE KEENES, Wayne, IL

Built 1909 Load: 17.5 t ADT: 100

FAS 800

Fair

Over: EMMONS CREEK

1.5 MI W MT. ERIE, Wayne, IL

Built 1939 Load: 17.5 t ADT: 725

CUNNINGHAM RD

Fair

Over: GROVE CREEK

0.25 MI W CONGER RD, Winnebago, IL

Built 1960 Load: 17.5 t ADT: 250

Showing 4,351-4,400 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.