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

E LORAN RD

Poor

Over: DAVIS CREEK

2MI E PLEASANT VALLY, Jo Daviess, IL

Built 1920 Load: 17.5 t ADT: 50

TOWNSHIP RD NO 158

Poor

Over: HELLS BRANCH

3 MI NE OF ELIZABETH, Jo Daviess, IL

Built 1916 Load: 17.5 t ADT: 25

TR 210

Poor

Over: WALNUT CREEK

N1/2-17-T13NR3E, Knox, IL

Built 1900 Load: 17.5 t ADT: 50

PARK AVE (W)

Poor

Over: SKOKIE DITCH

.2 M E 41, Lake, IL

Built 1950 Load: 17.5 t ADT: 6,150

CH-5

Poor

Over: BRUSHY FORK

1 MI W PINKSTAFF, Lawrence, IL

Built 1971 Load: 17.5 t ADT: 175

MORGAN RD

Poor

Over: DRAINAGE DITCH

0.2 MI S MAYTOWN RD, Lee, IL

Built 1978 Load: 17.5 t ADT: 100

TR201 BEEMERVILLE

Poor

Over: UNNAMED STREAM

3 MI NE COMPTON, Lee, IL

Built 1977 Load: 17.5 t ADT: 125

TR 18B

Poor

Over: SCATTERING POINT

1585 N, 400 E, Livingston, IL

Built 1960 Load: 17.5 t ADT: 275

ZILLES RD/ TR 392

Poor

Over: TRIB TO SPANKER BR

4.5MI SE HIGHLAND, Madison, IL

Built 1925 Load: 17.5 t ADT: 150

TR 115 (HARRIS LAN

Poor

Over: W FORK WOOD RIVER CK

1.5 MI N ALTON, Madison, IL

Built 1990 Load: 17.5 t ADT: 1,100

TR 171

Poor

Over: SKILLET FORK

4 MI NE IUKA, Marion, IL

Built 1976 Load: 17.5 t ADT: 25

CH-26 (FAS-441)

Poor

Over: GRINDSTONE CREEK

NW-32-T4NR3W, McDonough, IL

Built 1940 Load: 17.5 t ADT: 150

TR 477

Poor

Over: TRIB SUGAR CR

E.CTR-33-T4NR1W, McDonough, IL

Built 1915 Load: 17.5 t ADT: 10

FAS 1571

Poor

Over: PIKE CREEK

5 MI E GREENVIEW, Menard, IL

Built 1957 Load: 17.5 t ADT: 50

TR 14

Poor

Over: DRAINAGE DITCH

1.0 MI N OAKFORD, Menard, IL

Built 1978 Load: 17.5 t ADT: 25

TR 191

Poor

Over: BRUSHY CREEK

2.5 NE OF ELKTON, Washington, IL

Built 1968 Load: 17.5 t ADT: 25

I- 55 WEST FRNT RD

Poor

Over: SUNNYLAND DRAIN

1.8 M S OF US 30, Will, IL

Built 1959 Load: 17.5 t ADT: 400

TR 202

Poor

Over: W. BUREAU CREEK

6.5 MI SE OF WALNUT, Bureau, IL

Built 1915 Load: 17.8 t ADT: 25

JEFFERSON STREET

Poor

Over: ROCKY RUN CREEK

W CENTER OF TISKILWA, Bureau, IL

Built 1925 Load: 17.8 t ADT: 125

FAS 1577

Poor

Over: COX CREEK

1.5 MI WSW NEWMANSV., Cass, IL

Built 1982 Load: 17.8 t ADT: 425

TR 216

Poor

Over: OSBERN BRANCH

3MI SE MT.AUBURN, Christian, IL

Built 1954 Load: 17.8 t ADT: 20

TR 137A

Poor

Over: PRAIRIE CREEK

1 MI SE HUEY, Clinton, IL

Built 1942 Load: 17.8 t ADT: 100

TR-165

Poor

Over: N FK EMBARRAS RIVER

1.5 MI W OBLONG, Crawford, IL

Built 1909 Load: 17.8 t ADT: 50

WHEELER RD

Poor

Over: TRIMBLE RUN

3550N 140E, DeKalb, IL

Built 1964 Load: 17.8 t ADT: 175

TOOT PL LN - TR 40

Poor

Over: STREAM

SE-32-T5NR3E, Fulton, IL

Built 1979 Load: 17.8 t ADT: 50

ILL 100

Poor

Over: DRAINS TO EAGLE LAKE

5.5N GRAFTON, Jersey, IL

Built 1938 Load: 17.8 t ADT: 775

FAS-801

Poor

Over: MAD CREEK

1 MI E CHAUNCEY, Lawrence, IL

Built 1973 Load: 17.8 t ADT: 325

TR 66(BAKER RD)

Poor

Over: MOSQUITO CREEK

1.6 MI SE OF BOODY, Macon, IL

Built 1957 Load: 17.8 t ADT: 50

FROHLING RD

Poor

Over: S BR KISHWAUKEE

1.1 MI SE OF SEEMANN, McHenry, IL

Built 1978 Load: 17.8 t ADT: 325

OAK GROVE RD.

Poor

Over: BR OF MIDDLE CRK

3.8 N. W. BYRON, Ogle, IL

Built 1967 Load: 17.8 t ADT: 25

AKRON ROAD

Poor

Over: BR KICKAPOO CREEK

NW-35-T11NR7E, Peoria, IL

Built 1957 Load: 17.8 t ADT: 275

TR 291

Poor

Over: BR POND CREEK

4.00 MI S CARRIER M, Saline, IL

Built 1987 Load: 17.8 t ADT: 10

FAS 1481-CH 7

Poor

Over: PRAIRIE CREEK

N.CTR-4-T23NR3W, Tazewell, IL

Built 1959 Load: 17.8 t ADT: 1,650

TR 190

Poor

Over: STREAM

N.CTR-29-T26NR3W, Tazewell, IL

Built 1966 Load: 17.8 t ADT: 1,800

TR 13

Poor

Over: WHISKY CREEK BRANCH

2 MI SE RANKIN, Vermilion, IL

Built 1968 Load: 17.8 t ADT: 20

SBI-163

Poor

Over: SUGAR CREEK

.25 MI NE PALESTINE, Crawford, IL

Built 1937 Load: 18.1 t ADT: 20

TR 306

Poor

Over: FLOUR CREEK

2.0 MI W AUGUSTA, Hancock, IL

Built 1969 Load: 18.1 t ADT: 50

TR 217

Poor

Over: SPRING CR

2 MI E ONARGA, Iroquois, IL

Built 1965 Load: 18.1 t ADT: 75

TR 2E

Poor

Over: STREAM

1 MI W OF AMBIA IND., Iroquois, IL

Built 1914 Load: 18.1 t ADT: 50

MC NULTY ROAD

Poor

Over: VIRGIL DR DITCH NO.1

1.5 MI E MAPLE PARK, Kane, IL

Built 1962 Load: 18.1 t ADT: 100

FAI 270 EB

Poor

Over: COUNTY DITCH

1.03mi W. of IL 157, Madison, IL

Built 1963 Load: 18.1 t ADT: 24,900

ADAMS STREET

Poor

Over: BRANCH MONEY CREEK

SE QUAD OF TOWANDA, McLean, IL

Built 1938 Load: 18.1 t ADT: 100

TR 90 (11W)

Poor

Over: SPRING CREEK

2.0 E BERLIN, Sangamon, IL

Built 1958 Load: 18.1 t ADT: 50

TR 156

Poor

Over: STONY CREEK

6.0 E CAMDEN, Schuyler, IL

Built 1900 Load: 18.1 t ADT: 50

TR 332

Poor

Over: BN RR

2.5 MI W OF BADER, Schuyler, IL

Built 1900 Load: 18.1 t ADT: 50

LYNDON RD

Poor

Over: ELSWORTH CREEK

1 MI N PROPHETSTOWN, Whiteside, IL

Built 1972 Load: 18.1 t ADT: 125

CH 22/FAS 780

Poor

Over: DRY FORK

2.25 MI N OLD RIPLEY, Bond, IL

Built 1958 Load: 18.5 t ADT: 350

TR 12 A

Poor

Over: CLEAR CREEK

4.25 MI W. PALMER, Christian, IL

Built 1920 Load: 18.5 t ADT: 150

TEE BROOK DRIVE

Poor

Over: TINLEY CREEK

0.3M S. OF 151ST ST, Cook, IL

Built 1971 Load: 18.5 t ADT: 275

TR 84

Poor

Over: BR OF SPRING CREEK

1.5 E .25 N JCT45&24, Iroquois, IL

Built 1953 Load: 18.5 t ADT: 75

Showing 25,801-25,850 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.