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 179 A

Fair

Over: STREAM

1 MI NE URBANA, Champaign, IL

Built 1982 Load: 32.4 t ADT: 50

TR 235 C

Fair

Over: STREAM

2.5 MI NNE PHILO, Champaign, IL

Built 1982 Load: 32.4 t ADT: 50

TR 15

Fair

Over: SUGAR CREEK

5.6 MI N PENFIELD, Champaign, IL

Built 1986 Load: 32.4 t ADT: 100

TR 310

Fair

Over: STREAM

3.3 MI SSW GIFFORD, Champaign, IL

Built 1984 Load: 32.4 t ADT: 25

TR 98

Fair

Over: SANGAMON RIVER

3 MI NE FISHER, Champaign, IL

Built 1986 Load: 32.4 t ADT: 150

TR 172 F

Fair

Over: STREAM

2 MI S OF URBANA, Champaign, IL

Built 1984 Load: 32.4 t ADT: 700

TR 101

Fair

Over: STREAM

3.5 MI NE MAHOMET, Champaign, IL

Built 1988 Load: 32.4 t ADT: 350

CH 50(FAS 1520)

Fair

Over: LAKE OF THE WOODS

1.2 MI N JCT US 150, Champaign, IL

Built 1987 Load: 32.4 t ADT: 2,250

FAU 7154(CH 25)

Fair

Over: COPPER SLOUGH

0.33 MI N of Windsor, Champaign, IL

Built 1988 Load: 32.4 t ADT: 7,100

TR 230

Fair

Over: STREAM

1 MI W SELLERS, Champaign, IL

Built 1988 Load: 32.4 t ADT: 75

TR 235 C

Fair

Over: SALT FORK RIVER

1 MI N OF SIDNEY, Champaign, IL

Built 1989 Load: 32.4 t ADT: 50

TR 107 A

Fair

Over: FLATVILLE DRAINAGE

1 MI SW FLATVILLE, Champaign, IL

Built 1988 Load: 32.4 t ADT: 100

TR 49

Fair

Over: MID FORK VERMILION R

1.7 MI NE PENFIELD, Champaign, IL

Built 1993 Load: 32.4 t ADT: 75

TR 85

Fair

Over: SANGAMON RIVER

4 MI N OF MAHOMET, Champaign, IL

Built 1994 Load: 32.4 t ADT: 75

TR 28 A

Fair

Over: STREAM

4.6 MI NW MAHOMET, Champaign, IL

Built 1990 Load: 32.4 t ADT: 50

TR 83

Fair

Over: FLATVILLE DITCH

3.2 MI SW GIFFORD, Champaign, IL

Built 1991 Load: 32.4 t ADT: 50

TR 113 B

Fair

Over: SPOON RIVER

2.9 MI NW OF ROYAL, Champaign, IL

Built 1993 Load: 32.4 t ADT: 50

TR 123

Fair

Over: STREAM

.5 MI N OF ROYAL, Champaign, IL

Built 1992 Load: 32.4 t ADT: 50

TR 130

Fair

Over: WILDCAT SLOUGH

1 MI N OF DEWEY, Champaign, IL

Built 1993 Load: 32.4 t ADT: 625

TR 225

Fair

Over: KANKAKEE DITCH

7.2 MI NW OF SADORUS, Champaign, IL

Built 1993 Load: 32.4 t ADT: 25

TR 47

Fair

Over: DRAINAGE DITCH

1 MI NW OF DILLSBURG, Champaign, IL

Built 1994 Load: 32.4 t ADT: 25

TR 45

Fair

Over: DRAINAGE DITCH

1 MI N OF RANTOUL, Champaign, IL

Built 1995 Load: 32.4 t ADT: 125

TR 78

Fair

Over: SANGAMON RIVER

1 MI S OF FISHER, Champaign, IL

Built 1999 Load: 32.4 t ADT: 600

TR 252

Fair

Over: DRAINAGE DITCH

2 MI NE OF RANTOUL, Champaign, IL

Built 1998 Load: 32.4 t ADT: 100

FAU 715/ STALEY RD

Fair

Over: PHINNEY BRANCH

W EDGE OF CHAMPAIGN, Champaign, IL

Built 2006 Load: 32.4 t ADT: 7,100

TR 169

Fair

Over: TRIB SALT FORK DITCH

2 MILE N ST. JOE, Champaign, IL

Built 2005 Load: 32.4 t ADT: 25

CH 18

Fair

Over: KANKAKEE DITCH

5.5 MI N IVESDALE, Champaign, IL

Built 2004 Load: 32.4 t ADT: 1,950

TR 130

Fair

Over: HILLSBURY SLOUGH

3.4 MI N DEWEY, Champaign, IL

Built 2009 Load: 32.4 t ADT: 225

C.H. 11

Fair

Over: Flatville Drainage D

W side of Flatville, Champaign, IL

Built 2014 Load: 32.4 t ADT: 1,100

FAS-516 (CH-9)

Fair

Over: Prairie Creek

5.3 mi E of Ludlow, Champaign, IL

Built 2017 Load: 32.4 t ADT: 325

SOMER DR (MS 1400)

Fair

Over: SALINE BRANCH

N URBANA W OF LINCOL, Champaign, IL

Built 1990 Load: 32.4 t ADT: 650

CH-3-FAS 635

Fair

Over: SANGAMON RIVER

0.10 MI W. ROBY, Christian, IL

Built 1965 Load: 32.4 t ADT: 700

TR 28

Fair

Over: PRAIRIE FORK

1.5 M N MORRISONVILL, Christian, IL

Built 1968 Load: 32.4 t ADT: 175

TR 110

Fair

Over: SPRING BRANCH

1.5 M WNW SHARPSBURG, Christian, IL

Built 1968 Load: 32.4 t ADT: 125

TR 185

Fair

Over: BIG GEORGE BRANCH

2 MI N ASSUMPTION, Christian, IL

Built 1962 Load: 32.4 t ADT: 20

TR 329 A

Fair

Over: BEAR CREEK

2.5 S MORRISONVILLE, Christian, IL

Built 1969 Load: 32.4 t ADT: 10

FAS 1634 - TR 102

Fair

Over: BUCKHART CREEK

4.5 MI. N. EDINBURG, Christian, IL

Built 1976 Load: 32.4 t ADT: 550

TR 246

Fair

Over: MOSQUITO CREEK

5MI SE MT.AUBURN, Christian, IL

Built 1977 Load: 32.4 t ADT: 100

TR 111A

Fair

Over: S. FORK SANGAMON R.

1.5 MI N KINCAID, Christian, IL

Built 1981 Load: 32.4 t ADT: 175

TR 217A

Fair

Over: BIG GEORGE BRANCH

1 MI SW ASSUMPTION, Christian, IL

Built 1978 Load: 32.4 t ADT: 250

TR 232

Fair

Over: MOSQUITO CREEK

1 MI S. OSBERNVILLE, Christian, IL

Built 1983 Load: 32.4 t ADT: 200

TR 321A

Fair

Over: S FORK SANGAMON RIV

7 ESE MORRISONVILLE, Christian, IL

Built 1978 Load: 32.4 t ADT: 150

TR 26

Fair

Over: BEAR CREEK

1.75 M S MORRISONVLE, Christian, IL

Built 1980 Load: 32.4 t ADT: 125

TR 270

Fair

Over: BIG GEORGE CREEK

5 NW PANA, Christian, IL

Built 1980 Load: 32.4 t ADT: 100

TR 170

Fair

Over: COTTON CREEK

4 NW OF OHLMAN, Christian, IL

Built 1981 Load: 32.4 t ADT: 50

TR 210

Fair

Over: BUCKHART CREEK

1 MI W. STONINGTON, Christian, IL

Built 1981 Load: 32.4 t ADT: 20

TR 321 A

Fair

Over: WILLOW CREEK

2MI SE MORRISONVILLE, Christian, IL

Built 1981 Load: 32.4 t ADT: 35

TR 228

Fair

Over: LOCUST CREEK

1.25 SW MILLERSVILLE, Christian, IL

Built 1982 Load: 32.4 t ADT: 50

TR 198

Fair

Over: BUCKHART CREEK

2 MI W STONINGTON, Christian, IL

Built 1982 Load: 32.4 t ADT: 75

TR 55

Fair

Over: GROVE CITY CREEK

4 S OF MT. AUBURN, Christian, IL

Built 1982 Load: 32.4 t ADT: 125

Showing 7,401-7,450 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.