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

OLD US 36

Fair

Over: HOOVER BRANCH

1/2 MILE SE CLEAR L, Sangamon, IL

Built 1977 Load: 32.4 t ADT: 3,250

VETERANS PKWY (IL

Fair

Over: LICK CR TRIBUTARY

.5M N MANSION RD., Sangamon, IL

Built 1974 Load: 32.4 t ADT: 22,300

TR 300

Fair

Over: BRUSH CREEK

2.5 MI NE OF PAWNEE, Sangamon, IL

Built 1957 Load: 32.4 t ADT: 75

FAS623-CH45

Fair

Over: LICK CREEK

.5 MI S LOAMI, Sangamon, IL

Built 1986 Load: 32.4 t ADT: 300

CH-33

Fair

Over: NORTH FORKCLEAR LAKE

1.5 W MECHANICSBURG, Sangamon, IL

Built 1981 Load: 32.4 t ADT: 550

CH 33

Fair

Over: CLEAR CREEK

1.5 W MECHANICSBURG, Sangamon, IL

Built 1981 Load: 32.4 t ADT: 550

MECHANICSBURG-CO 1

Fair

Over: CLEAR CREEK

3.0 S OF DAWSON, Sangamon, IL

Built 1982 Load: 32.4 t ADT: 800

RT 630 BP 129

Fair

Over: SOUTH FORK SANGAMON

2.5 S OF RIVERTON, Sangamon, IL

Built 1981 Load: 32.4 t ADT: 2,800

TR 12.25 W

Fair

Over: SOUTH FORKLICK CREEK

4.0 SW LOAMI, Sangamon, IL

Built 1977 Load: 32.4 t ADT: 125

TR 313

Fair

Over: HORSE CREEK

2.0 MI NW NEW CITY, Sangamon, IL

Built 1993 Load: 32.4 t ADT: 75

TR 328A (3E)

Fair

Over: Horse Creek

2.0 mi S of Pawnee, Sangamon, IL

Built 1978 Load: 32.4 t ADT: 150

MUNI 7675

Fair

Over: TRIB TO PANTHER CR.

2.0 S CHATHAM, Sangamon, IL

Built 1981 Load: 32.4 t ADT: 100

COUNTY HWY 34

Fair

Over: CLEAR CREEK

.1 S OF LANESVILLE, Sangamon, IL

Built 1935 Load: 32.4 t ADT: 100

GARDNER BP141

Fair

Over: WILLOW BR. CREEK

1.5 N BRADFORDTON, Sangamon, IL

Built 1981 Load: 32.4 t ADT: 275

WENTWORTH ST

Fair

Over: POLECAT CREEK

PIPER GLEN, Sangamon, IL

Built 2002 Load: 32.4 t ADT: 1,600

NORTH GRAND

Fair

Over: STREAM

.2 mi E Bruns Ln, Sangamon, IL

Built 1976 Load: 32.4 t ADT: 5,200

US 24

Fair

Over: CROOKED CR TRIB

.07M S IL 103, Schuyler, IL

Built 1960 Load: 32.4 t ADT: 3,050

IL 99

Fair

Over: SWAMP DITCH

1M S IL 101, Schuyler, IL

Built 1939 Load: 32.4 t ADT: 400

FAS 1581

Fair

Over: LAMOINE RIVER

BROWN CO LINE, Schuyler, IL

Built 1994 Load: 32.4 t ADT: 75

TR 295

Fair

Over: CRANE CREEK

3.0 E SUGAR GROVE, Schuyler, IL

Built 1981 Load: 32.4 t ADT: 50

TR 275

Fair

Over: E. FORK CRANE CR

3.0 SE OF RUSHVILLE, Schuyler, IL

Built 1981 Load: 32.4 t ADT: 25

TR 238

Fair

Over: CREEK-CRANE

5.0 SSE OF RUSHVILLE, Schuyler, IL

Built 1985 Load: 32.4 t ADT: 25

TR 262

Fair

Over: EAST FORK-CRANE CRK

3.0 MI SE RUSHVILLE, Schuyler, IL

Built 1997 Load: 32.4 t ADT: 25

TR 293

Fair

Over: Crane Creek

.15 mi W TR 297, Schuyler, IL

Built 2014 Load: 32.4 t ADT: 25

TR 274

Fair

Over: E Fk Crane Creek

1.00 mi E TR 270, Schuyler, IL

Built 2016 Load: 32.4 t ADT: 225

TR 53

Fair

Over: WILLIAMS CREEK

1.5MISWBIRMINGHAM, Schuyler, IL

Built 1981 Load: 32.4 t ADT: 10

TR 68

Fair

Over: CAMP CREEK

MC DONOUGH CO LINE, Schuyler, IL

Built 1995 Load: 32.4 t ADT: 25

TR 38

Fair

Over: FLOWER BRANCH

2.5 W BRMINGHM, Schuyler, IL

Built 2008 Load: 32.4 t ADT: 25

TR-19

Fair

Over: FLOWER CREEK

0.5 MI S BIRMINGHAM, Schuyler, IL

Built 2001 Load: 32.4 t ADT: 25

TR 132

Fair

Over: FOWLER BRANCH

2 MI E OF BROOKLYN, Schuyler, IL

Built 1977 Load: 32.4 t ADT: 50

TR 94

Fair

Over: WILLOW CREEK

2 M N BROOKLYN, Schuyler, IL

Built 2007 Load: 32.4 t ADT: 50

TR 130

Fair

Over: HONEY BRANCH

3 MI E OF BROOKLYN, Schuyler, IL

Built 1992 Load: 32.4 t ADT: 75

TR 112

Fair

Over: WILLOW CREEK

2MI N BROOKLYN, Schuyler, IL

Built 1994 Load: 32.4 t ADT: 25

TR-69

Fair

Over: FOWLER TRIB

3.5 MI E BROOKLYN, Schuyler, IL

Built 2002 Load: 32.4 t ADT: 25

TR 175

Fair

Over: SUGAR CREEK

4 MI NW BROWNING, Schuyler, IL

Built 1987 Load: 32.4 t ADT: 50

TR 175

Fair

Over: BRANCH SCAB HOLLOW

4.0 MI NW BROWNING, Schuyler, IL

Built 1983 Load: 32.4 t ADT: 50

TR 346

Fair

Over: DUTCHMANS CREEK

1MI N BROWNING, Schuyler, IL

Built 1991 Load: 32.4 t ADT: 25

TR-165

Fair

Over: SUGAR CRK

1MI S FULTON CO LN, Schuyler, IL

Built 1997 Load: 32.4 t ADT: 25

TR 148

Fair

Over: STONY CREEK

4.0 MI E OF CAMDEN, Schuyler, IL

Built 1981 Load: 32.4 t ADT: 50

TR 136

Fair

Over: MISSOURI CREEK

1.75 MI.S.ERWIN, Schuyler, IL

Built 1982 Load: 32.4 t ADT: 50

TR 40

Fair

Over: LITTLE CEDAR CR

.5 M W CAMDEN, Schuyler, IL

Built 2012 Load: 32.4 t ADT: 50

TR 14

Fair

Over: CEDAR CREEK

2 MI SW HUNTSVILLE, Schuyler, IL

Built 1987 Load: 32.4 t ADT: 25

TR 60

Fair

Over: MISSOURI CREEK

3 MI SW CAMDEN, Schuyler, IL

Built 1991 Load: 32.4 t ADT: 75

TR 2

Fair

Over: CEDAR CRK

ADAMS CO LINE, Schuyler, IL

Built 2000 Load: 32.4 t ADT: 25

TR 185

Fair

Over: LITTLE CEDAR CREEK

2.5MI SE HUNTSVILLE, Schuyler, IL

Built 1994 Load: 32.4 t ADT: 25

TR 34

Fair

Over: TRIB CEDAR CR

5 W CAMDEN, Schuyler, IL

Built 2007 Load: 32.4 t ADT: 25

TR 11

Fair

Over: WEST BRANCH SUGAR CK

3 MI NE LITTLETON, Schuyler, IL

Built 1995 Load: 32.4 t ADT: 25

TR-182

Fair

Over: Stony Creek

2.0 Mi S Littleton, Schuyler, IL

Built 2009 Load: 32.4 t ADT: 100

TR 61

Fair

Over: SUGAR CREEK

3.0 MI NW OF RAY, Schuyler, IL

Built 1984 Load: 32.4 t ADT: 25

TR 308

Fair

Over: SUGAR CREEK

1.0 MI. NO. RAY, Schuyler, IL

Built 1989 Load: 32.4 t ADT: 25

Showing 9,451-9,500 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.