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

GORENZ DR/TR 143

Structurally Deficient

Over: TRIB TO SILVER CR

2.5 MI NW ALHAMBRA, Madison, IL

Built 1971 Load: 4.2 t ADT: 100

TR 370

Structurally Deficient

Over: CREEK

0.5 MI E PRENTICE, Morgan, IL

Built 1900 Load: 4.2 t ADT: 50

TR 137A

Structurally Deficient

Over: LOST CK

2MIS.E. HUEY, Clinton, IL

Built 1916 Load: 4.5 t ADT: 50

TR 33

Structurally Deficient

Over: BRUSH CRK.

1.2 M E OF VIRDEN, Macoupin, IL

Built 1954 Load: 4.5 t ADT: 100

TR 46 (TH-S18)

Structurally Deficient

Over: BR CROW CREEK

T13N-R9E-4PM SEC 2, Marshall, IL

Built 1930 Load: 4.5 t ADT: 25

CH-7

Structurally Deficient

Over: Cedar Creek

CTR-9-T11NR2W, Warren, IL

Built 1900 Load: 4.5 t ADT: 150

SEIL RD/COUNTY FAR

Structurally Deficient

Over: DUPAGE RIVER

0.5 MI W I-55, Will, IL

Built 1982 Load: 4.5 t ADT: 5,750

TR 78 A

Structurally Deficient

Over: FLAT BRANCH

.1 MI S HUMBOLDT, Coles, IL

Built 1929 Load: 5.2 t ADT: 10

TR 178

Structurally Deficient

Over: S HENDERSON CR

SW-22-T10NR4W, Henderson, IL

Built 1915 Load: 5.2 t ADT: 25

TR 488

Structurally Deficient

Over: BRUSH CRK

1 MI NE VIRDEN, Macoupin, IL

Built 1955 Load: 5.2 t ADT: 200

SEVENTH AVENUE

Structurally Deficient

Over: KYTE CREEK

ROCHELLE, Ogle, IL

Built 1966 Load: 5.2 t ADT: 1,600

TR 446 7.5 E

Structurally Deficient

Over: WOLF CREEK

1.5 NE WILLIAMSVILLE, Sangamon, IL

Built 1900 Load: 5.2 t ADT: 125

TR 327

Structurally Deficient

Over: LOUIS CREEK

.5MI S 1W BUCKLEY, Iroquois, IL

Built 1966 Load: 5.5 t ADT: 100

8TH AV

Structurally Deficient

Over: KEITH CREEK

0.05 MI E KISHWAUKEE, Winnebago, IL

Built 1919 Load: 5.5 t ADT: 375

SMITH RD

Structurally Deficient

Over: LONG RUN CR.

0.3 MI SO 135TH ST, Will, IL

Built 1968 Load: 5.8 t ADT: 1,950

LINCOLN ST

Structurally Deficient

Over: North Shore Channel

0.5 M E GREEN BAYP6, Cook, IL

Built 1908 Load: 6.2 t ADT: 4,400

CARBON HILL RD CH3

Structurally Deficient

Over: EAST FK MAZON RIVER

0.91 MI S OF FAS 289, Grundy, IL

Built 1977 Load: 6.2 t ADT: 1,550

FAS 174/CH 9

Structurally Deficient

Over: PECUMSAGAN CREEK

E 12TH,N 3225, LaSalle, IL

Built 1962 Load: 6.2 t ADT: 150

PAULSEN RD

Structurally Deficient

Over: N BR KISHWAUKEE RIV

1.7 MI S OF STREIT R, McHenry, IL

Built 1959 Load: 6.2 t ADT: 250

TR 165

Structurally Deficient

Over: BN RR

3.0 MI W 0F BADER, Schuyler, IL

Built 1983 Load: 6.2 t ADT: 25

TR-223

Structurally Deficient

Over: STINKING CREEK

4.5 MI WNW GRAYVILLE, Edwards, IL

Built 1909 Load: 6.5 t ADT: 25

MS 1160

Structurally Deficient

Over: DRAINAGE DITCH

S edge Warsaw, Hancock, IL

Built 1920 Load: 6.5 t ADT: 125

TR-307

Structurally Deficient

Over: FOX RIVER

3 MI NE SHAMROCK, Jasper, IL

Built 1909 Load: 6.5 t ADT: 75

TR 193(OLD IL. 130

Structurally Deficient

Over: EMBARRAS RIVER

SO. LAKE CHARLESTON, Coles, IL

Built 1907 Load: 6.8 t ADT: 100

OLD ILL RTE 3

Structurally Deficient

Over: MILLER CREEK

1 MI. N. OF THEBES, Alexander, IL

Built 1933 Load: 7.1 t ADT: 100

TR 228

Structurally Deficient

Over: TRIB OF BRONSON CR

3.5 NE DENVER, Hancock, IL

Built 1909 Load: 7.1 t ADT: 25

TR 91

Structurally Deficient

Over: GROVE CREEK

4.5 NW BURNSIDE, Hancock, IL

Built 1966 Load: 7.1 t ADT: 75

CH 14

Structurally Deficient

Over: TRIM CR.

1.16 MI NE MOMENCE, Kankakee, IL

Built 1980 Load: 7.1 t ADT: 1,200

TR 225

Structurally Deficient

Over: SPRING CREEK

N 34TH E 090, LaSalle, IL

Built 1965 Load: 7.1 t ADT: 125

MS-6090 (CURTISS S

Structurally Deficient

Over: B&N RR

0.35MI N of IL 104, Morgan, IL

Built 1901 Load: 7.1 t ADT: 50

TR-326

Structurally Deficient

Over: SAM'S BRANCH

3 MI NE HUNT, Jasper, IL

Built 1909 Load: 7.5 t ADT: 25

TR 221

Structurally Deficient

Over: ROCKY BRANCH

3.0 MI SE TOWERHILL, Shelby, IL

Built 1909 Load: 7.5 t ADT: 50

WATKINS STREET

Structurally Deficient

Over: DEER CREEK

CISNE, Wayne, IL

Built 1909 Load: 7.5 t ADT: 400

TR 185

Structurally Deficient

Over: OAK BRANCH

2MI N ASSUMPTION, Christian, IL

Built 1900 Load: 7.8 t ADT: 20

TR 217 A

Structurally Deficient

Over: BRUSHY BRANCH

5MI W ASSUMPTION, Christian, IL

Built 1953 Load: 7.8 t ADT: 100

TR 33 A

Structurally Deficient

Over: TRIB EMBARRAS RIVER

1.5 MI SW OF DIONA, Cumberland, IL

Built 1970 Load: 7.8 t ADT: 25

COUNTY LINE RD

Structurally Deficient

Over: KISHWAUKEE OVERFLOW

0.5 M N OFUS 20, McHenry, IL

Built 1978 Load: 8.1 t ADT: 475

RICHARDS STREET

Structurally Deficient

Over: HICKORY CREEK

150 FT S FIFTH AVE, Will, IL

Built 1930 Load: 8.1 t ADT: 250

MS-4065 Creekside

Structurally Deficient

Over: Spring Brook

500 FT S SPRNG GREEN, DuPage, IL

Built 1970 Load: 8.7 t ADT: 2,050

TR-359 A

Structurally Deficient

Over: STREAM

N 2649 E 2425, LaSalle, IL

Built 1971 Load: 8.7 t ADT: 50

MARENGO ROAD

Structurally Deficient

Over: RUSH CREEK

0.6 MI S AIRPORT RD, McHenry, IL

Built 1956 Load: 8.7 t ADT: 850

ALGONQUIN RD

Structurally Deficient

Over: SPRING CR

0.1 MI SW PLUM TREE, McHenry, IL

Built 1986 Load: 8.7 t ADT: 3,200

TR 71

Structurally Deficient

Over: MARROWBONE CREEK

1.9 MI NW BETHANY, Moultrie, IL

Built 1966 Load: 8.7 t ADT: 100

TR 123A

Structurally Deficient

Over: WALNUT CR TRIBUTARY

1.0 MI N HULL, Pike, IL

Built 1920 Load: 8.7 t ADT: 25

GRAND RIDGE ROAD

Structurally Deficient

Over: HOG RUN

0.1 MI E LASALLE RD, Grundy, IL

Built 1939 Load: 9.1 t ADT: 1,150

TR-2 LASALLE RD

Structurally Deficient

Over: WAUPECON CR

.5 MI N GARDNER RD, LaSalle, IL

Built 1963 Load: 9.1 t ADT: 25

CH 34

Structurally Deficient

Over: SOLOMON CRK.

3 SW OF HETTICK, Macoupin, IL

Built 1900 Load: 9.1 t ADT: 50

OLD CHARTER OAK RO

Structurally Deficient

Over: BR.OF BIG HOLLOW CR

NW CORNE1/422T9NR7E, Peoria, IL

Built 1900 Load: 9.1 t ADT: 25

TR 82

Structurally Deficient

Over: ACHENBACH BRANCH

3.5 N PALMER, Christian, IL

Built 1920 Load: 9.4 t ADT: 50

KINNEMAN LAKE ROAD

Structurally Deficient

Over: STREAM N OF OHIO RIV

.5 MI N OHIO RIVER, Massac, IL

Built 1900 Load: 9.4 t ADT: 75

Showing 27,151-27,200 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.