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 343

Fair

Over: SPOON RIVER

7 MI SW OF BUDA, Bureau, IL

Built 1910 Load: 6.8 t ADT: 50

TR-316

Fair

Over: LITTLE SALT CREEK

2 MI SW MONTROSE, Effingham, IL

Built 1909 Load: 6.8 t ADT: 25

TOWNSHIP ROAD 194

Fair

Over: BRANCH OF CROW CREEK

3 MI SE OF MILO, Bureau, IL

Built 1982 Load: 7.1 t ADT: 25

TR-212B

Fair

Over: BUCK CREEK

2 MI N FLORA, Clay, IL

Built 1960 Load: 7.1 t ADT: 50

TR 73

Fair

Over: IDA CREEK

1155E, 2425N, Livingston, IL

Built 1930 Load: 7.1 t ADT: 25

TR 371

Fair

Over: BUCK BRANCH

1.0 MI S NEBO, Pike, IL

Built 1900 Load: 7.1 t ADT: 75

TR 54

Fair

Over: STREAM

4.8 MI N HERRICK, Shelby, IL

Built 1981 Load: 7.1 t ADT: 75

TR 725 B

Fair

Over: GRAPE CREEK

1 MI E BELGIUM, Vermilion, IL

Built 1900 Load: 7.1 t ADT: 50

GRASSY ROAD

Fair

Over: LITTLE GRASSY LK SPILLWY

10.0 MI SW OF HDQRTRS, Williamson, IL

Built 1939 Load: 7.3 t ADT: 800

TR 193

Fair

Over: BIG GEORGE BRANCH

1 MI N. ASSUMPTION, Christian, IL

Built 1963 Load: 7.5 t ADT: 50

TR-3

Fair

Over: LIMESTONE CREEK

5 MI NE BIBLE GROVE, Effingham, IL

Built 1914 Load: 7.5 t ADT: 75

TR 87

Fair

Over: Trib Williams Creek

1.40 mi S IL 101, Schuyler, IL

Built 1960 Load: 7.5 t ADT: 50

TR 242

Fair

Over: LA MOINE RIV

1.0 W LACROSSE, Hancock, IL

Built 1951 Load: 7.8 t ADT: 50

TR-41

Fair

Over: JACK OAK CREEK

1.5 MI SE DUNDAS, Richland, IL

Built 1909 Load: 7.8 t ADT: 50

TR 282A

Fair

Over: OAK BRANCH

2.7 N ASSUMPTION, Christian, IL

Built 1966 Load: 8.1 t ADT: 150

TR-364

Fair

Over: SUCK CREEK

5 MI NW ST ELMO, Fayette, IL

Built 1935 Load: 8.1 t ADT: 50

DEER RUN ROAD

Fair

Over: SEVENMILE CREEK

.25 MI S US45, Massac, IL

Built 1966 Load: 8.1 t ADT: 10

ILL 146

Fair

Over: HILLS BRANCH

0.3 MI E OF ILL 145, Pope, IL

Built 1928 Load: 8.1 t ADT: 1,450

TR 387

Fair

Over: STREAM

2.0 MI SE OCONEE, Shelby, IL

Built 1965 Load: 8.1 t ADT: 125

TR 204

Fair

Over: COTTON CREEK

6MI W PANA, Christian, IL

Built 1900 Load: 8.4 t ADT: 150

FAI 70/FR 2442

Fair

Over: STREAM

SE OF ST ELMO, Fayette, IL

Built 1899 Load: 8.4 t ADT: 10

TR 228

Fair

Over: BRONSON CREEK

2.0 NE DENVER, Hancock, IL

Built 1922 Load: 8.4 t ADT: 25

TR 129 B

Fair

Over: PAPER MILL BRANCH

2.5 MI N TAYLORVILLE, Christian, IL

Built 1956 Load: 8.7 t ADT: 750

TR 71 A

Fair

Over: STREAM

1.5 MI S HUMBOLT, Coles, IL

Built 1935 Load: 8.7 t ADT: 25

TR-58 BUFFALO RD

Fair

Over: WAUPECON CR

.5 M S GRAND RIDGE R, Grundy, IL

Built 1910 Load: 8.7 t ADT: 50

TR 62 - EHLERS RD

Fair

Over: CREEK

1/4 MI S PERRY CO LI, Jackson, IL

Built 1996 Load: 8.7 t ADT: 25

TR 115

Fair

Over: CREEK

420 E, 1950 N, Livingston, IL

Built 1940 Load: 8.7 t ADT: 25

TR-187 (KELLEY RD)

Fair

Over: SUMNER CREEK

0.5 MI E KLINGER RD, Winnebago, IL

Built 1948 Load: 8.7 t ADT: 125

TR 116

Fair

Over: COURT CREEK

1 MI E GALESBURG, Knox, IL

Built 1928 Load: 9.1 t ADT: 125

FAS 582

Fair

Over: STAR DITCH

2.MI NE COOPERSTOWN, Brown, IL

Built 1900 Load: 9.4 t ADT: 50

TR 18

Fair

Over: CLEAR CREEK

1 MI. S. SICILY, Christian, IL

Built 1957 Load: 9.4 t ADT: 100

TR 8A

Fair

Over: SHIPE CREEK

3.0 NW TIOGA, Hancock, IL

Built 1915 Load: 9.4 t ADT: 50

TR 168

Fair

Over: WHISKEY CR

1.1 MI S. CH 10, Iroquois, IL

Built 1929 Load: 9.4 t ADT: 25

ATKINSON RD

Fair

Over: GREEN RIVER

4.6 MI N BUREAU CO L, Lee, IL

Built 1967 Load: 9.4 t ADT: 100

HEBRON RD

Fair

Over: NIPPERSINK CREEK

0.8 W OF JOHNSON RD, McHenry, IL

Built 1961 Load: 9.4 t ADT: 250

PERKINS RD

Fair

Over: W BR PISCASAW CREEK

0.3 W LAWRENCE RD, McHenry, IL

Built 1961 Load: 9.4 t ADT: 225

TR 355

Fair

Over: BRUSH CREEK

3.5 MI N OF PAWNEE, Sangamon, IL

Built 1956 Load: 9.4 t ADT: 75

TR 235

Fair

Over: CLEAR CREEK

4MI NW MORRISONVILLE, Christian, IL

Built 1957 Load: 9.7 t ADT: 50

TR 110

Fair

Over: LITTLE CAMP CR

NW-35-T15NR4W, Mercer, IL

Built 1900 Load: 9.7 t ADT: 25

TR 96

Fair

Over: BROWN CREEK

2.5 SW ELDARA, Pike, IL

Built 1960 Load: 9.7 t ADT: 25

COUNTY HWY 45

Fair

Over: JOHNS CREEK

3.0 N OF LOWDER, Sangamon, IL

Built 1939 Load: 9.7 t ADT: 175

TR 320

Fair

Over: RICHLAND CREEK

3.5 MI SW STRASBURG, Shelby, IL

Built 1909 Load: 9.7 t ADT: 50

TR 112A

Fair

Over: MUD CREEK

1.6 MI W OF HENTON, Shelby, IL

Built 1972 Load: 9.7 t ADT: 75

TR 213A

Fair

Over: LITTLE MUDDY RIVER

1 MI N RADOM, Washington, IL

Built 1920 Load: 9.7 t ADT: 25

TR 282A

Fair

Over: OAK BRANCH

2MI NW ASSUMPTION, Christian, IL

Built 1966 Load: 10.0 t ADT: 150

CYPRESS RD/ TR 258

Fair

Over: SILVER LAKE FORK

1.5 MI SW ST JACOB, Madison, IL

Built 1901 Load: 10.4 t ADT: 100

TR 49

Fair

Over: SORGHUM BRANCH

6 MI W YANTISVLE, Shelby, IL

Built 1970 Load: 10.4 t ADT: 100

TR 76H

Fair

Over: STREAM

SE-35-T24NR5W, Tazewell, IL

Built 1967 Load: 10.4 t ADT: 375

TR-19

Fair

Over: LITTLE MUDDY

2.5 MI NE BIBLE GROV, Clay, IL

Built 1970 Load: 10.7 t ADT: 50

TR-257

Fair

Over: SPRING CREEK

1200N/1680E, Henry, IL

Built 1947 Load: 10.7 t ADT: 25

Showing 4,051-4,100 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.