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 296

Fair

Over: FLAT BRANCH

2MI W MOWEQUEA, Christian, IL

Built 2002 Load: 32.4 t ADT: 225

CH 10-FAS 732

Fair

Over: BEAR CREEK

1 MI E MORRISONVILLE, Christian, IL

Built 2002 Load: 32.4 t ADT: 500

TR 2A

Fair

Over: PRAIRIE FORK

1 M N HARVEL, Christian, IL

Built 2007 Load: 32.4 t ADT: 50

CH-10 FAS 732

Fair

Over: PRAIRIE CREEK

1 M W MORRISONVILLE, Christian, IL

Built 2002 Load: 32.4 t ADT: 800

FAS 732 (CH 10)

Fair

Over: MILLER BRANCH

2.5 E MORRISONVILLE, Christian, IL

Built 2006 Load: 32.4 t ADT: 400

TR 78

Fair

Over: LOWIS BRANCH

3MI SE MORRISONVILLE, Christian, IL

Built 2005 Load: 32.4 t ADT: 100

TR 235

Fair

Over: PRAIRIE FORK

1.5MI N PALMER, Christian, IL

Built 2005 Load: 32.4 t ADT: 100

TR 235

Fair

Over: BEAR CREEK

1MI N PALMER, Christian, IL

Built 2005 Load: 32.4 t ADT: 100

FAS 639 (CH 5)

Fair

Over: MILLER BRANCH

2 M S PALMER, Christian, IL

Built 2006 Load: 32.4 t ADT: 200

TR 196A

Fair

Over: S. FORK SANGAMON R

3.5MI SW ROSAMOND, Christian, IL

Built 2005 Load: 32.4 t ADT: 100

TR 50

Fair

Over: LONG GROVE CREEK

.8 MI NW MOWEAQUA, Christian, IL

Built 2009 Load: 32.4 t ADT: 175

TR 343

Fair

Over: BEAMER BRANCH

7Mi SE Morrisonville, Christian, IL

Built 2014 Load: 32.4 t ADT: 25

TR 151

Fair

Over: BRUSHY BRANCH

3.5 M SE STONINGTON, Christian, IL

Built 2008 Load: 32.4 t ADT: 175

TR 186A

Fair

Over: S FK SANGAMON RVR

5 M SW ROSEMOND, Christian, IL

Built 2009 Load: 32.4 t ADT: 10

TR 50

Fair

Over: LONG GROVE TRIB

.75 M N MOWEQUA, Christian, IL

Built 2009 Load: 32.4 t ADT: 175

TR 57

Fair

Over: Buckhart Creek

4 MI NE of Edinburg, Christian, IL

Built 2013 Load: 32.4 t ADT: 35

TR 169

Fair

Over: BID GEORGE BR

3 M N ASSUMPTION, Christian, IL

Built 2009 Load: 32.4 t ADT: 100

TR 206

Fair

Over: TRIB LOCUST CREEK

.5 M W OWANECO, Christian, IL

Built 2014 Load: 32.4 t ADT: 20

TR 307A

Fair

Over: STH FRK SANGAMON RV

7 M E Morrisonville, Christian, IL

Built 2013 Load: 32.4 t ADT: 20

TR 216

Fair

Over: BUCKHART CREEK

NW edge Stonington, Christian, IL

Built 2012 Load: 32.4 t ADT: 175

TR 245

Fair

Over: COTTONWOOD CREEK

0.51 mi E TR 196, Christian, IL

Built 2015 Load: 32.4 t ADT: 20

TR 151A

Fair

Over: Big George Branch

0.03 mi E TR 296, Christian, IL

Built 2015 Load: 32.4 t ADT: 225

TR 289

Fair

Over: Locust Creek

0.08 mi W TR 228, Christian, IL

Built 2015 Load: 32.4 t ADT: 50

CHEROKEE ST

Fair

Over: DIEHL CREEK

MORRISONVILLE, Christian, IL

Built 1997 Load: 32.4 t ADT: 225

US 40(FAS 1707)

Fair

Over: LITTLE CREEK

1.6 MI E MARTNSVILLE, Clark, IL

Built 1954 Load: 32.4 t ADT: 2,050

US 40(FAS 1707)

Fair

Over: HURRICANE CREEK

W OF CLARK CENTER, Clark, IL

Built 1955 Load: 32.4 t ADT: 2,350

FAI 70

Fair

Over: DITCH

1.5 MI NW MARSHALL, Clark, IL

Built 1971 Load: 32.4 t ADT: 23,400

TR 395

Fair

Over: N FORK RACCOON CREEK

2.8 MI S WEST UNION, Clark, IL

Built 1979 Load: 32.4 t ADT: 100

FAS 696(TR 142)

Fair

Over: WILLOW CREEK

3 MI SE MARTINSVILLE, Clark, IL

Built 1979 Load: 32.4 t ADT: 350

TR 339

Fair

Over: MOUNT BRANCH

2.0 MI NW MORIAH, Clark, IL

Built 1979 Load: 32.4 t ADT: 200

TR 207

Fair

Over: STREAM

6 MI ESE MARSHALL, Clark, IL

Built 1979 Load: 32.4 t ADT: 125

CH 20

Fair

Over: MUDD CREEK

1 MI NE DENNISON, Clark, IL

Built 1909 Load: 32.4 t ADT: 200

TR 251

Fair

Over: PARTRIDGE CREEK

1.5 MI E ERNST, Clark, IL

Built 1982 Load: 32.4 t ADT: 50

FAS 1658(CH 16)

Fair

Over: WILLOW CREEK

2.5 MI W ORANGE, Clark, IL

Built 1983 Load: 32.4 t ADT: 150

TR 325

Fair

Over: N FORK EMBARRASS R

5 MI SE OF CASEY, Clark, IL

Built 1985 Load: 32.4 t ADT: 100

TR 234

Fair

Over: MILL CREEK

5.5 MI S MARSHALL, Clark, IL

Built 1984 Load: 32.4 t ADT: 100

TR 101

Fair

Over: TRIB BIG CREEK

3 MI NE MARSHALL, Clark, IL

Built 1987 Load: 32.4 t ADT: 125

TR 46

Fair

Over: QUARRY BRANCH

2 MI SE OF CASEY, Clark, IL

Built 1996 Load: 32.4 t ADT: 300

FAP-327 (US-50)

Fair

Over: STREAM

.5 MI W RACCOON CK, Clay, IL

Built 1970 Load: 32.4 t ADT: 2,800

TR-84

Fair

Over: BRANCH BUSH CREEK

1.5 MI SE XENIA, Clay, IL

Built 1978 Load: 32.4 t ADT: 50

TR-333

Fair

Over: CONNERS BRANCH

3.5 MI NW XENIA, Clay, IL

Built 1978 Load: 32.4 t ADT: 50

TR-235

Fair

Over: GROVE CREEK

1.5 MI S LOUISVILLE, Clay, IL

Built 1978 Load: 32.4 t ADT: 250

TR-355

Fair

Over: ELM CREEK

2.5 MI SE FLORA, Clay, IL

Built 1983 Load: 32.4 t ADT: 50

TR-144

Fair

Over: CROOKED CREEK

3.5 MI NW LOUISVILLE, Clay, IL

Built 1983 Load: 32.4 t ADT: 100

TR-226

Fair

Over: ELM CREEK

1 MI NE FLORA, Clay, IL

Built 1995 Load: 32.4 t ADT: 125

TR-281

Fair

Over: BUCK CREEK

4 MI NW FLORA, Clay, IL

Built 1987 Load: 32.4 t ADT: 100

TR-157

Fair

Over: LITTLE PANTHER CREEK

3 MI NE LOUISVILLE, Clay, IL

Built 1989 Load: 32.4 t ADT: 100

FAS 2798-CH 10

Fair

Over: BUCK CREEK

2 MI N FLORA, Clay, IL

Built 2004 Load: 32.4 t ADT: 250

OLD US 50

Fair

Over: SHOAL CREEK

1.7 M E BREESE, Clinton, IL

Built 1923 Load: 32.4 t ADT: 4,350

ILL 160

Fair

Over: TRIB TO SUGAR CREEK

0.36 MI S MAD CO LN, Clinton, IL

Built 1938 Load: 32.4 t ADT: 5,200

Showing 7,501-7,550 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.