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 227

Fair

Over: INDIAN GRAVE CANAL

4.0 MI N QUINCY, Adams, IL

Built 1984 Load: 19.4 t ADT: 50

TR 0362

Fair

Over: BEAR CRK

1.8 MI SE Coatsburg, Adams, IL

Built 1900 Load: 19.4 t ADT: 75

FAS 1782

Fair

Over: CONRAIL RR

1.6 M NW DUDLEYVILLE, Bond, IL

Built 1943 Load: 19.4 t ADT: 800

MSS 6130

Fair

Over: CONRAIL RR

0.35 M S OF STATE ST, Bond, IL

Built 1901 Load: 19.4 t ADT: 200

TR-232

Fair

Over: LIME CREEK

5 MI. N.W. PRINCETON, Bureau, IL

Built 1959 Load: 19.4 t ADT: 50

US 150(FAS 1517)

Fair

Over: STREAM

2 MI W OF MAHOMET, Champaign, IL

Built 1925 Load: 19.4 t ADT: 1,700

TR 230

Fair

Over: STREAM

4.8 MI SW ST JOSEPH, Champaign, IL

Built 1964 Load: 19.4 t ADT: 350

TR 169

Fair

Over: OAK BRANCH

3MI N ASSUMPTION, Christian, IL

Built 1919 Load: 19.4 t ADT: 100

TR 197

Fair

Over: STREAM

1 MI S COLES AIRPORT, Coles, IL

Built 1909 Load: 19.4 t ADT: 100

BLUFF CITY BLVD

Fair

Over: POPLAR CREEK

0.15M. E OF KANE CO., Cook, IL

Built 1909 Load: 19.4 t ADT: 3,000

PARKVIEW DR

Fair

Over: ADDISON CR TRIB

0.08 M N NORTH P9, Cook, IL

Built 1954 Load: 19.4 t ADT: 475

MS-1382 (Prk Acc R

Fair

Over: DTCH TO CAL RIV

WOLF LAKE CONS P8C, Cook, IL

Built 1955 Load: 19.4 t ADT: 250

TR 212

Fair

Over: BELL BRANCH

NE GREENUP W IL 130, Cumberland, IL

Built 1922 Load: 19.4 t ADT: 25

MILLER RD

Fair

Over: BR LITTLE ROCK CREEK

1200N 1395E, DeKalb, IL

Built 1960 Load: 19.4 t ADT: 25

LEE ROAD

Fair

Over: BR LITTLE ROCK CREEK

1100N 1300E, DeKalb, IL

Built 1960 Load: 19.4 t ADT: 225

TR 87

Fair

Over: DRAINAGE DITCH

2.3 MI SE MURDOCK, Douglas, IL

Built 1970 Load: 19.4 t ADT: 50

FAS-1814

Fair

Over: MUD CREEK

1 MI N GRAYVILLE, Edwards, IL

Built 1970 Load: 19.4 t ADT: 275

TR-40

Fair

Over: SECOND CREEK

1 MI NE ALTAMONT, Effingham, IL

Built 1909 Load: 19.4 t ADT: 25

TR-153

Fair

Over: SECOND CREEK

1 MI SE KEPTOWN, Effingham, IL

Built 1909 Load: 19.4 t ADT: 50

TR-231A

Fair

Over: FULFER CREEK

4 MI SW ALTAMONT, Effingham, IL

Built 1909 Load: 19.4 t ADT: 100

TR-530

Fair

Over: TRIB DISMAL CREEK

3 MI N FARINA, Fayette, IL

Built 1935 Load: 19.4 t ADT: 150

TR-533

Fair

Over: TRIB DISMAL CREEK

W LA CLEDE, Fayette, IL

Built 1930 Load: 19.4 t ADT: 100

TR 30A SULLIVANT

Fair

Over: STREAM

1080N,800E, Ford, IL

Built 1968 Load: 19.4 t ADT: 75

FAS-1879 (CH-7)

Fair

Over: TRIB BIG CREEK

1 MI S DAHLGREN, Hamilton, IL

Built 1962 Load: 19.4 t ADT: 650

TR 98

Fair

Over: W FK OF BEAR CREEK

0.1 MI S OF ELVASTON, Hancock, IL

Built 1918 Load: 19.4 t ADT: 50

C.H. 5 FAS 232

Fair

Over: MUD CR. TRIBUTARY

31/2 MI. S. ATKINSON, Henry, IL

Built 1948 Load: 19.4 t ADT: 1,500

TR382B

Fair

Over: ACME DITCH

7 MI. S.E. ATKINSON, Henry, IL

Built 1949 Load: 19.4 t ADT: 75

TR-185

Fair

Over: CASEY FORK

JC LAKE DAM, Jefferson, IL

Built 1909 Load: 19.4 t ADT: 175

TR 101A

Fair

Over: GRANARY CR

5 MI SE OF ESSEX, Kankakee, IL

Built 1981 Load: 19.4 t ADT: 50

ROGER WILLIAMS

Fair

Over: RAVINE

0.2M E LK MICHIGAN, Lake, IL

Built 1915 Load: 19.4 t ADT: 3,750

TR 324 A

Fair

Over: BUCK CREEK

E 19TH N 3460, LaSalle, IL

Built 1964 Load: 19.4 t ADT: 475

FAS268 A/CH 15

Fair

Over: ILL & MICH CANAL

CHI5 OVER I&M CANAL, LaSalle, IL

Built 1939 Load: 19.4 t ADT: 5,800

MORRIS RD (MS 2330

Fair

Over: GUM CR

Morris Rd over Gum C, LaSalle, IL

Built 1908 Load: 19.4 t ADT: 50

IL 121

Fair

Over: FORK DEER CREEK

1M S IL 10 - LINCOLN, Logan, IL

Built 1964 Load: 19.4 t ADT: 3,650

CH 18(SCHOOL RD)

Fair

Over: STEVENS CREEK

2.1 MI S OF MAROA, Macon, IL

Built 1969 Load: 19.4 t ADT: 200

TR 114C(RILEY RD)

Fair

Over: WILLOW BRANCH

1.6 MI SE MACON, Macon, IL

Built 1976 Load: 19.4 t ADT: 50

OLD HILLSBORO/ TR

Fair

Over: TRIB TO SILVER CK

1.0 E LIVINGSTON, Madison, IL

Built 1901 Load: 19.4 t ADT: 175

SILVER CRK RD/TR 1

Fair

Over: TRIB TO SILVER CK

1.5MI S LIVINGSTON, Madison, IL

Built 1901 Load: 19.4 t ADT: 100

COLUMBIA RD/TR 250

Fair

Over: TRIB TO SILVER CK

2.0 MI S HAMEL, Madison, IL

Built 1916 Load: 19.4 t ADT: 200

GOSHEN RD/ TR 253

Fair

Over: TRIB TO SILVER CK

4.0MI NE TROY, Madison, IL

Built 1901 Load: 19.4 t ADT: 300

TR 268

Fair

Over: TR1B TO SILVER CK

0.25MI W LIVINGSTON, Madison, IL

Built 1901 Load: 19.4 t ADT: 150

FAS-1787

Fair

Over: VERMILLION CREEK

1 MI W SALEM, Marion, IL

Built 1909 Load: 19.4 t ADT: 600

TR-219

Fair

Over: VERMILION CREEK

1 MI W SALEM, Marion, IL

Built 1909 Load: 19.4 t ADT: 500

TR-254

Fair

Over: FULKS CREEK

S PART SALEM, Marion, IL

Built 1966 Load: 19.4 t ADT: 725

TR-261

Fair

Over: VERMILION CREEK

2 MI S SALEM, Marion, IL

Built 1909 Load: 19.4 t ADT: 150

TR 270

Fair

Over: NORTH FORK

4 MI NW KINMUNDY, Marion, IL

Built 1918 Load: 19.4 t ADT: 25

ISLAND ROAD

Fair

Over: MOKELER CREEK

1.1 MI N STREIT RD, McHenry, IL

Built 1926 Load: 19.4 t ADT: 600

TR 151

Fair

Over: E FK SHOAL CR

3.5 MI SW NOKOMIS, Montgomery, IL

Built 1962 Load: 19.4 t ADT: 50

LK CAMELOT DR-TR 7

Fair

Over: LANCELOT SPILLWAY

LAKE LANCELOT DAM, Peoria, IL

Built 1971 Load: 19.4 t ADT: 1,350

ILL 127

Fair

Over: OPOSSUM CREEK

1 MI N P'VILLE, Perry, IL

Built 1936 Load: 19.4 t ADT: 4,150

Showing 4,501-4,550 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.