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 199

Poor

Over: STREAM

4.0 MI N HILLSBORO, Montgomery, IL

Built 1900 Load: 13.3 t ADT: 75

TR 0334

Poor

Over: STREAM

4.7 M S WITT, Montgomery, IL

Built 1900 Load: 13.3 t ADT: 25

RAZORVILLE ROAD

Poor

Over: SPRING CREEK

3.2 MI NE OF OREGON, Ogle, IL

Built 1983 Load: 13.3 t ADT: 125

TR 499 A

Poor

Over: STREAM

1 MI SE SIGEL, Shelby, IL

Built 1920 Load: 13.3 t ADT: 50

TR 185

Poor

Over: BR OF BEAVER CREEK

2.5 MI S OF GRNVILLE, Bond, IL

Built 1979 Load: 13.6 t ADT: 200

TR-297B

Poor

Over: Two Mile Slough

3 MI W OF PESOTUM, Champaign, IL

Built 1937 Load: 13.6 t ADT: 175

TR 190

Poor

Over: BUCKHART CREEK

3MI W STONINGTON, Christian, IL

Built 1900 Load: 13.6 t ADT: 20

SBI 146

Poor

Over: DUTCHMAN CREEK

1.5 MI E OF ILL 37, Johnson, IL

Built 1930 Load: 13.6 t ADT: 200

TR 408

Poor

Over: CREEK

0.5 MI NE NOKOMIS, Montgomery, IL

Built 1900 Load: 13.6 t ADT: 150

CH 3

Poor

Over: LITTLE CREEK

CH 3 IN DONGOLA, Union, IL

Built 1935 Load: 13.6 t ADT: 600

CH 30 / SBI 15

Poor

Over: STREAM

4 MI W EDWARDS CO LN, Wayne, IL

Built 1921 Load: 13.6 t ADT: 10

SECOND STREET

Poor

Over: HENNEPIN CANAL FEEDR

E EDGE OF ROCK FALLS, Whiteside, IL

Built 1976 Load: 13.6 t ADT: 1,450

SHEPLEY RD

Poor

Over: DU PAGE RIV

0.5 MI SE RIVER RD, Will, IL

Built 1980 Load: 13.6 t ADT: 1,550

FAS 1746 (CH 1)

Poor

Over: BURLINGTON NORTH R R

3.75 M N GREENVILLE, Bond, IL

Built 1907 Load: 13.9 t ADT: 775

TR 84A

Poor

Over: LITTLE MISSOURI

8.0 NW MT STERLING, Brown, IL

Built 1900 Load: 13.9 t ADT: 75

TR 64

Poor

Over: CATFISH CREEK

1.5 MI W RED 1.25 N, Edgar, IL

Built 1967 Load: 13.9 t ADT: 50

FR 870

Poor

Over: WAGON CREEK

.5 MILES WEST OF CR#18, Johnson, IL

Built 1967 Load: 13.9 t ADT: 29

TR 121

Poor

Over: FIVE MILE CREEK

2720 E, 1900 N, Livingston, IL

Built 1950 Load: 13.9 t ADT: 10

FIRST AVENUE

Poor

Over: KYTE CREEK

ROCHELLE 1ST. AVE., Ogle, IL

Built 1978 Load: 13.9 t ADT: 1,550

TR 70A

Poor

Over: CEDAR CR

NE-12-T11NR3W, Warren, IL

Built 1900 Load: 13.9 t ADT: 20

TR-211

Poor

Over: BRUSH CREEK

0.5 MI SE NEWTON, Jasper, IL

Built 1909 Load: 14.3 t ADT: 250

WASHINGTON ST

Poor

Over: GUM CREEK

WASH ST OV GUM CR, LaSalle, IL

Built 1920 Load: 14.3 t ADT: 175

TR 172

Poor

Over: PENN CENTRAL RR

1.0 M S ILL 140, Madison, IL

Built 1901 Load: 14.3 t ADT: 350

MURRAY ROAD

Poor

Over: SLOUGH CREEK

.15 MI N NELSON RD, McHenry, IL

Built 1968 Load: 14.3 t ADT: 225

KILBUCK BLUFF FP

Poor

Over: BR KILBUCK CR

BY KILBUCK CREEK, Winnebago, IL

Built 1926 Load: 14.3 t ADT: 475

TR 92

Poor

Over: MILLER BRANCH

0.40 mi S FAS 732(CH 10), Christian, IL

Built 1921 Load: 14.6 t ADT: 100

TR 359

Poor

Over: STREAM

3 MI ENE WEST UNION, Clark, IL

Built 1958 Load: 14.6 t ADT: 75

ILL 34

Poor

Over: HALLTOWN CREEK

1 M.SE OF T-SONVILLE, Franklin, IL

Built 1929 Load: 14.6 t ADT: 2,100

FAU-165 (W Solon R

Poor

Over: N Br Nippersink Cr

0.5M E IL-31, McHenry, IL

Built 1983 Load: 14.6 t ADT: 325

TR 78A(OLD SBI 147

Poor

Over: HODGES BAYOU

0.4 MI W ILL 37, Pulaski, IL

Built 1929 Load: 14.6 t ADT: 75

COUNTY HWY 28

Poor

Over: HORSE CREEK

2.0 MI S PAWNEE, Sangamon, IL

Built 1957 Load: 14.6 t ADT: 375

TR 360

Poor

Over: E. BUREAU CREEK

1.5 MI. W. ARLINGTON, Bureau, IL

Built 1954 Load: 14.9 t ADT: 100

ATLAS ST(MS 8350)

Poor

Over: STREAM

SE CORNER CHANUTE, Champaign, IL

Built 1900 Load: 14.9 t ADT: 50

TR 106

Poor

Over: MILLER BRANCH

5MI E MORRISONVILLE, Christian, IL

Built 1914 Load: 14.9 t ADT: 50

TR 47

Poor

Over: WEST FORK MAZON R

2085 E, 2700 N, Livingston, IL

Built 1920 Load: 14.9 t ADT: 50

SLANE RD - TR 186

Poor

Over: BR PRINCE RUN

NW-20-AKRON, Peoria, IL

Built 1962 Load: 14.9 t ADT: 50

TR 73

Poor

Over: WOLF CREEK

4.9 MI NW WINDSOR, Shelby, IL

Built 1977 Load: 14.9 t ADT: 25

PERKINS RD.

Poor

Over: COUNTY DITCH NO. 1

3 MI S.E. PROPHETSTO, Whiteside, IL

Built 1966 Load: 14.9 t ADT: 75

FAS-2869 (ILL-37)

Poor

Over: STREAM

5.2 MI S ILL-148, Jefferson, IL

Built 1921 Load: 15.2 t ADT: 4,150

TR-435A

Poor

Over: STREAM

0.5 MI S BELLE RIVE, Jefferson, IL

Built 1993 Load: 15.2 t ADT: 10

TR-4

Poor

Over: BRUSH CREEK

E 0TH N 3905, LaSalle, IL

Built 1972 Load: 15.2 t ADT: 100

N. COON ROAD

Poor

Over: BRUSH CREEK

3.0 MI E ORANGEVILLE, Stephenson, IL

Built 1947 Load: 15.2 t ADT: 25

TR 10B MFT120

Poor

Over: LOUIS CREEK

3.5MI W BUCKLEY .2 S, Iroquois, IL

Built 1962 Load: 15.6 t ADT: 20

VAN DYKE RD

Poor

Over: MIDDLE AUXSABLE CK

WEST OF MCANNA, Kendall, IL

Built 1972 Load: 15.6 t ADT: 50

HARRISON STREET

Poor

Over: CURTIS CREEK

ON HARRISON AT 26TH, Adams, IL

Built 1967 Load: 15.9 t ADT: 7,500

TR 327

Poor

Over: SPRINGSIDE BRANCH

1 MI E PANA, Christian, IL

Built 1900 Load: 15.9 t ADT: 1,100

FAS-801 (CH 16)

Poor

Over: BIG MUDDY CREEK

1.2 MI W INGERHAM, Clay, IL

Built 1951 Load: 15.9 t ADT: 450

COTTAGE GROVE AVE

Poor

Over: LITTLE CAL RIV

0.5 M N US 6, Cook, IL

Built 1932 Load: 15.9 t ADT: 2,975

TR 93

Poor

Over: N FK OF RILEY CREK

0.5 MI E OF NAUVOO, Hancock, IL

Built 1974 Load: 15.9 t ADT: 75

MARION & ROSNEY

Poor

Over: CNTRYCLB BR SUGAR CR

0.5 MI NE 9& 150, McLean, IL

Built 1946 Load: 15.9 t ADT: 200

Showing 25,701-25,750 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.