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 831

Poor

Over: SPRING CREEK

0.3 Mi N of VET PKWY, Sangamon, IL

Built 1960 Load: 2.3 t ADT: 600

CH 17

Poor

Over: EXLINE SL

5.85 MI NE MANTENO, Kankakee, IL

Built 1961 Load: 2.6 t ADT: 1,050

TR 49 B

Poor

Over: PRAIRIE CR

1.5 MI E. L'RABLE, Iroquois, IL

Built 1904 Load: 3.2 t ADT: 25

TR 28

Poor

Over: CRYSTAL GLEN CREEK

1.9 MI S HAMILTON, Hancock, IL

Built 1914 Load: 3.6 t ADT: 150

TR 28

Poor

Over: CRYSTAL GLEN CREEK

2.0 S HAMILTON, Hancock, IL

Built 1914 Load: 3.6 t ADT: 150

TR 350

Poor

Over: HARRIS BRNCH

FULTON CO LINE, Schuyler, IL

Built 1900 Load: 3.9 t ADT: 25

TR-95

Poor

Over: TRIB BIG CREEK

2.75 MI S DAHLGREN, Hamilton, IL

Built 1909 Load: 4.2 t ADT: 75

FAU-3818 Mack Road

Poor

Over: W Br DuPage River

0.2 MI E IL 59, DuPage, IL

Built 1954 Load: 4.5 t ADT: 2,200

TR 170

Poor

Over: MACOUPIN CRK

BEAVER DAM ST. PARK, Macoupin, IL

Built 1900 Load: 4.5 t ADT: 50

TR 107

Poor

Over: WILBORN CREEK

4.3 MI SW BETHANY, Moultrie, IL

Built 1956 Load: 4.5 t ADT: 25

TR 22

Poor

Over: TAR CK

1.8MI NE OAKFORD, Menard, IL

Built 1900 Load: 4.9 t ADT: 50

TR 226

Poor

Over: TRIB OF SPRING CR

0.5 MI N OF DISCO, Hancock, IL

Built 1919 Load: 5.5 t ADT: 50

SKUNK HOLLOW RD

Poor

Over: KICKAPOO CREEK TRIB

3 N .5 E LINCOLN, Logan, IL

Built 1900 Load: 5.5 t ADT: 50

TR 258

Poor

Over: LAKE FORK

2MI NW PANA, Christian, IL

Built 1898 Load: 5.8 t ADT: 10

TR 229

Poor

Over: MIDDLE CREEK

2 MI W OF MIDDLECR., Hancock, IL

Built 1961 Load: 5.8 t ADT: 75

TR-188

Poor

Over: CREEK

3.5 MI NE WALTONVILL, Jefferson, IL

Built 1909 Load: 5.8 t ADT: 125

TR 166

Poor

Over: COOP BR

2 MI N .5 MI E SHIPM, Macoupin, IL

Built 1917 Load: 5.8 t ADT: 100

TR 313

Poor

Over: RICHLAND CREEK

5 MI SW STRASBURG, Shelby, IL

Built 1967 Load: 5.8 t ADT: 75

TR-208

Poor

Over: LITTLE DRY FORK

5 MI N SIMS, Wayne, IL

Built 1930 Load: 5.8 t ADT: 10

TR 144

Poor

Over: NORTH FORK

1.99 mi S FAS 1581, Brown, IL

Built 1900 Load: 6.2 t ADT: 25

TR 258

Poor

Over: STREAM

3.6 MI SW GREENFIELD, Greene, IL

Built 1901 Load: 6.8 t ADT: 150

TR 256

Poor

Over: LITTLE INDIAN CREEK

2 MI. W. YATESVILLE, Morgan, IL

Built 1936 Load: 6.8 t ADT: 50

CH 19

Poor

Over: HILLERY CREEK

3 MI. S. CAMBRIDGE, Henry, IL

Built 1959 Load: 7.1 t ADT: 325

TR 32

Poor

Over: PRAIRIE CREEK

2920 N, 600 E, Livingston, IL

Built 1922 Load: 7.5 t ADT: 50

TR 110

Poor

Over: STREAM

NW-26-T15NR4W, Mercer, IL

Built 1983 Load: 7.5 t ADT: 25

TR 162A

Poor

Over: NORTH CREEK

1.5 MI NW HUEGELY, Washington, IL

Built 1930 Load: 7.5 t ADT: 25

TR 124

Poor

Over: BEAR CRK.

4.5 MI W LORAINE, Adams, IL

Built 1922 Load: 7.8 t ADT: 75

TR 495

Poor

Over: S QUINCY DITCH

2.5 MI S QUINCY, Adams, IL

Built 1996 Load: 7.8 t ADT: 550

TR 266

Poor

Over: LA MOINE RIVER

2.0 S DISCO, Hancock, IL

Built 1915 Load: 7.8 t ADT: 100

TR 52A

Poor

Over: MUD CREEK

2765 N, 800 E, Livingston, IL

Built 1901 Load: 7.8 t ADT: 50

TR-266

Poor

Over: Paul Creek

1.5 MI SW AMITY, Richland, IL

Built 1909 Load: 7.8 t ADT: 50

TR-442

Poor

Over: LITTLE CREEK

4 MI NW ST ELMO, Fayette, IL

Built 1954 Load: 8.1 t ADT: 35

TR-459

Poor

Over: CREEK

2 MI SE BELLE RIVE, Jefferson, IL

Built 1909 Load: 8.1 t ADT: 10

WEBSTER AVE

Poor

Over: N BR CHICAGO RIVER

2200 N 1600 W, Cook, IL

Built 1916 Load: 8.4 t ADT: 4,600

TR-302

Poor

Over: RICHLAND CREEK

4.5 MI E SHOBONIER, Fayette, IL

Built 1930 Load: 8.4 t ADT: 75

FAS 532(CH 6)

Poor

Over: KANKAKEE DRAIN DITCH

4.8 MI S SEYMOUR, Champaign, IL

Built 1983 Load: 8.7 t ADT: 625

TR-19

Poor

Over: LONG BRANCH

0.25 MI NE DUNDAS, Richland, IL

Built 1909 Load: 8.7 t ADT: 20

TR 181

Poor

Over: BRUSHY CREEK

6.0 NW RUSHVILLE, Schuyler, IL

Built 1971 Load: 8.7 t ADT: 50

WINTER RD CH 49

Poor

Over: DOZA CREEK SOUTH

3.5 MI S IL 13, St. Clair, IL

Built 1901 Load: 8.7 t ADT: 175

CENTER RD - TR 275

Poor

Over: SUGAR CREEK

E.CTR-14-T22NR2W, Tazewell, IL

Built 1964 Load: 8.7 t ADT: 50

TR 15

Poor

Over: N. FORK CROOKED CREE

S.CTR-11-T7NR2W, McDonough, IL

Built 1959 Load: 9.1 t ADT: 50

US 67

Poor

Over: POPE CR

3 MI S OF VIOLA, Mercer, IL

Built 1931 Load: 9.1 t ADT: 2,600

TR 24

Poor

Over: MISSOURI CREEK

6.7 MI N TIMEWELL, Brown, IL

Built 1920 Load: 9.4 t ADT: 75

CO. HWY. 3

Poor

Over: LITTLE CREEK

0.5 MI N OF BURNSIDE, Hancock, IL

Built 1966 Load: 9.4 t ADT: 100

RINGWOOD ROAD SOUT

Poor

Over: RAVINE

RINGWOOD AT SHERIDAN, Lake, IL

Built 1913 Load: 9.4 t ADT: 475

TR 75

Poor

Over: GROVE CR

3.0 MI SE GREENVIEW, Menard, IL

Built 1900 Load: 9.4 t ADT: 25

TR 354 B

Poor

Over: BR LITTLE WABASH R

4.7 MI W SIGEL, Shelby, IL

Built 1909 Load: 9.4 t ADT: 50

TR 239A

Poor

Over: MIDDLE CREEK

1.80 mi E IL 336, Hancock, IL

Built 1917 Load: 9.7 t ADT: 50

FLAT IRON ROAD

Poor

Over: MOKELER CREEK

0.4 MI. S. ILL 173, McHenry, IL

Built 1950 Load: 9.7 t ADT: 1,550

US 67

Poor

Over: HENDERSON CR

6.7 MI S OF VIOLA, Mercer, IL

Built 1931 Load: 9.7 t ADT: 2,400

Showing 25,601-25,650 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.