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 133

Good

Over: DAVIS BAYOU

32-T15S-R6E, Massac, IL

Built 1995 Load: 40.8 t ADT: 550

TR 47-BENTON RD

Good

Over: TRIB OF GURLEY DITCH

0.1 MI E TR 82, Massac, IL

Built 1996 Load: 40.8 t ADT: 10

NEW COLUMBIA ROAD

Good

Over: BEAR CREEK DITCH

3.1 MI N ROUND KNOB, Massac, IL

Built 2014 Load: 40.8 t ADT: 650

IL 173

Good

Over: N BR NIPPERSINK CR

0.5 M W OF US 12, McHenry, IL

Built 1932 Load: 40.8 t ADT: 5,100

IL 176

Good

Over: S BR KISHWAUKEE RIV

1.1 M E IL 23, McHenry, IL

Built 2008 Load: 40.8 t ADT: 5,700

S. Harrison Street

Good

Over: Crystal Lake Overflo

0.1 MI S IL 62, McHenry, IL

Built 2023 Load: 40.8 t ADT: 1,400

FAS 294/OLD 66A NB

Good

Over: STREAM/DRNG DITCH

NEAR NCL/LEXINGTON, McLean, IL

Built 2018 Load: 40.8 t ADT: 2,050

TOWANDA AVE-FAU 64

Good

Over: DRAINAGE DITCH

2.0 MI NNW 55 & 9, McLean, IL

Built 1972 Load: 40.8 t ADT: 7,450

FAS 1573

Good

Over: SANGAMON RIVER

2 MI W OF ATHENS, Menard, IL

Built 1978 Load: 40.8 t ADT: 750

US 67 SB

Good

Over: BRUSHY FORK CREEK

2.25 MI S I 72/US 36, Morgan, IL

Built 2004 Load: 40.8 t ADT: 5,200

US 67 NB

Good

Over: BRUSHY FORK CREEK

2.25 MI S I 72/US 36, Morgan, IL

Built 2004 Load: 40.8 t ADT: 5,200

CH 18

Good

Over: APPLE CR TRIB

2.5 M S WAVERLY, Morgan, IL

Built 2003 Load: 40.8 t ADT: 300

IL 121 (FAP 320)

Good

Over: JONATHAN CREEK

3 MI E OF SULLIVAN, Moultrie, IL

Built 1967 Load: 40.8 t ADT: 5,700

IL ROUTE 64

Good

Over: DITCH

3.25 MI E OF IL 2, Ogle, IL

Built 2005 Load: 40.8 t ADT: 3,900

ILL 34 & 145

Good

Over: S FORK SALINE DITCH

1.2 MI N OF ILL 145, Saline, IL

Built 1923 Load: 40.8 t ADT: 4,100

TR 352

Good

Over: WHITE OAK CREEK

2.0 MI. E. ELDORADO, Saline, IL

Built 1982 Load: 40.8 t ADT: 10

IL 100

Good

Over: COX CREEK

1.5M N BROWNING CTR, Schuyler, IL

Built 1999 Load: 40.8 t ADT: 600

OLD US 67

Good

Over: ILLINOIS R TRIB.

.1M N FRED L AT STOP, Schuyler, IL

Built 2000 Load: 40.8 t ADT: 500

IL 158

Good

Over: BR of Richland Creek

300 feet S of IL 15, St. Clair, IL

Built 2013 Load: 40.8 t ADT: 9,050

NORTH GREENMOUNT R

Good

Over: RICHLAND CREEK

1.5 MI N SHILOH RD, St. Clair, IL

Built 1987 Load: 40.8 t ADT: 19,200

IL 26

Good

Over: RICHLAND CREEK

.5MI. S. ORANGEVILLE, Stephenson, IL

Built 2000 Load: 40.8 t ADT: 3,950

FAS 1466-CH 27

Good

Over: WEST FORK SUGAR CR

SW-34-T23NR2W, Tazewell, IL

Built 1967 Load: 40.8 t ADT: 400

CH-13

Good

Over: LIMEKILN CREEK

3 MI W CENTERVILLE, White, IL

Built 2008 Load: 40.8 t ADT: 75

T.R. 27

Good

Over: French Creek

3/4 M. W. Il. Rte. 1, White, IL

Built 2013 Load: 40.8 t ADT: 75

BROOKVIEW RD

Good

Over: SPRING CREEK

0.1 M S SPRING CR RD, Winnebago, IL

Built 2009 Load: 40.8 t ADT: 500

CUNNINGHAM RD

Good

Over: S BR KENT CREEK

.1 MI E MERIDIAN RD, Winnebago, IL

Built 2016 Load: 40.8 t ADT: 1,750

KELLEY ROAD

Good

Over: GROVE CREEEK

0.2 MI W CONGER RD., Winnebago, IL

Built 1991 Load: 40.8 t ADT: 150

ILL 96

Good

Over: PIGEON CREEK

2MI SE PAYSON, Adams, IL

Built 1992 Load: 41.1 t ADT: 900

FAS 2597 (CH 41)

Good

Over: BLUFF CANAL

2 MI W OF LIMA, Adams, IL

Built 1976 Load: 41.1 t ADT: 150

FAS 946

Good

Over: BLACK CREEK

1.3 MI S OLIVE BR, Alexander, IL

Built 1983 Load: 41.1 t ADT: 225

TR 373

Good

Over: NICKOLSON CREEK

0.5 MI E XENIA, Clay, IL

Built 2022 Load: 41.1 t ADT: 100

SHERMER RD

Good

Over: M F N BR CHICAGO RIV

0.1 M SW IL 68, Cook, IL

Built 1959 Load: 41.1 t ADT: 5,700

IL 62

Good

Over: POPLAR CREEK

E OF BARRINGTON RD, Cook, IL

Built 1997 Load: 41.1 t ADT: 19,300

WAVERLY AVE

Good

Over: MIDLOTHIAN CREEK

0.1M NE IL. RTE 50, Cook, IL

Built 2012 Load: 41.1 t ADT: 500

FAP 332 (IL 1)

Good

Over: Stream

MP 8.9, Crawford, IL

Built 2023 Load: 41.1 t ADT: 4,100

IL 133(FAP 749)

Good

Over: STREAM

2.5 MI W HINDSBORO, Douglas, IL

Built 2016 Load: 41.1 t ADT: 2,300

IL 53 (ROHLWING R

Good

Over: SPRINGBROOK CREEK

0.7 M S OF IL 19, DuPage, IL

Built 2010 Load: 41.1 t ADT: 17,300

GARTNER RD

Good

Over: WEST BR DUPAGE RIVER

100 FT N EDGEWATER, DuPage, IL

Built 1971 Load: 41.1 t ADT: 3,500

CH 9

Good

Over: HARPER CREEK

4 MI S ALBION, Edwards, IL

Built 2019 Load: 41.1 t ADT: 100

FAS 2801 IL 128

Good

Over: LITTLE MOCCASIN CK

3.25 MI S IL 33, Effingham, IL

Built 2022 Load: 41.1 t ADT: 1,150

ILL 47

Good

Over: DRUMMER CREEK

3.53 MI S OF ILL 9, Ford, IL

Built 1998 Load: 41.1 t ADT: 3,850

I-55 SB

Good

Over: GOOSEBERRY CR

1 MI E OF ILL 47, Grundy, IL

Built 1979 Load: 41.1 t ADT: 11,600

I-55 NB

Good

Over: GOOSEBERRY CR

1 MI E OF ILL 47, Grundy, IL

Built 1979 Load: 41.1 t ADT: 11,600

IL 94

Good

Over: CAMP CREEK

150 ft. S IL 9/94, Hancock, IL

Built 1982 Load: 41.1 t ADT: 1,250

TR 68

Good

Over: PRAIRIE CR

3.2MI N GILMAN, Iroquois, IL

Built 1972 Load: 41.1 t ADT: 50

N PANZIER LN

Good

Over: RAYSE CREEK

2 MI SW WOODLAWN, Jefferson, IL

Built 2014 Load: 41.1 t ADT: 150

IL 25

Good

Over: BREWSTER CREEK

4.6 M N OF IL 64, Kane, IL

Built 2002 Load: 41.1 t ADT: 10,700

FERN DELL RD

Good

Over: ROODS CK

0.2 MI E OF LINE RD, Kendall, IL

Built 1981 Load: 41.1 t ADT: 50

CH 44

Good

Over: PRAIRIE CREEK

2.88 MI S OF ILL 17, LaSalle, IL

Built 1984 Load: 41.1 t ADT: 325

TR-185

Good

Over: INDIAN CREEK

2 MI E BRIDGEPORT, Lawrence, IL

Built 1988 Load: 41.1 t ADT: 150

Showing 23,601-23,650 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.