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 119

Poor

Over: STREAM

WEST C L ELDORADO, Saline, IL

Built 1915 Load: 19.4 t ADT: 300

TR 1 (12N)

Poor

Over: FANCY CREEK

1.5 NW WILLIAMSVILLE, Sangamon, IL

Built 1963 Load: 19.4 t ADT: 50

FAS 648(CH 16)

Poor

Over: STREAM

3 MI SE OF MOWEAQUA, Shelby, IL

Built 1939 Load: 19.4 t ADT: 375

FAS 648(CH 16)

Poor

Over: FLAT BRANCH

4 MI NW YANTISVILLE, Shelby, IL

Built 1939 Load: 19.4 t ADT: 350

TR 9

Poor

Over: STREAM

2.5 MI SE MOWEAQUA, Shelby, IL

Built 1939 Load: 19.4 t ADT: 50

TR 124

Poor

Over: STREAM

2.5 MI NW YANTISVLE, Shelby, IL

Built 1939 Load: 19.4 t ADT: 50

ILL 157

Poor

Over: GOOSE LAKE CANAL

0.8 M E FAI 255, St. Clair, IL

Built 1932 Load: 19.4 t ADT: 6,000

TR 141

Poor

Over: SPOON RIVER

E.CTR-10-T12N,RGE, Stark, IL

Built 1983 Load: 19.4 t ADT: 75

E. JEFFERSON ST

Poor

Over: BULL RUN CREEK

WEST LINE 22 T25NR3W, Tazewell, IL

Built 1974 Load: 19.4 t ADT: 2,850

TR 32

Poor

Over: OLIVE BRANCH

3.5 MI NW FAIRMOUNT, Vermilion, IL

Built 1900 Load: 19.4 t ADT: 50

FAS 818

Poor

Over: WILLOW BRANCH

2 MI NE SAM DALE LK, Wayne, IL

Built 1915 Load: 19.4 t ADT: 50

GARNSEY AV

Poor

Over: SPRING CREEK

0.25 MI N JACKSON ST, Will, IL

Built 1911 Load: 19.4 t ADT: 275

GUILFORD ROAD

Poor

Over: KEITH CR

0.7 MI E OF ALPINE R, Winnebago, IL

Built 1952 Load: 19.4 t ADT: 10,150

LIBERTY DR

Poor

Over: NW DRAINAGEWAY

0.35 MI W OF KILBURN, Winnebago, IL

Built 1962 Load: 19.4 t ADT: 1,400

FAI 172 SB

Poor

Over: BN RR

1.5MI S I172/US24, Adams, IL

Built 1976 Load: 19.8 t ADT: 3,675

TR 156

Poor

Over: CAMP CREEK

2.5MI SE HERSMAN, Brown, IL

Built 1983 Load: 19.8 t ADT: 25

ELIZABETH DRIVE

Poor

Over: SALT CREEK

700 FT E CH 22, DuPage, IL

Built 1973 Load: 19.8 t ADT: 2,400

MSS 5090A

Poor

Over: SEMINARY CK

IN WHITEHALL, Greene, IL

Built 1901 Load: 19.8 t ADT: 175

CEMETERY RD TR-25

Poor

Over: AUX SABLE CR

.13 MI W TABLER RD, Grundy, IL

Built 1979 Load: 19.8 t ADT: 650

FAS 424

Poor

Over: CAMP CREEK

2.6 MI. W. OF COLUSA, Hancock, IL

Built 1968 Load: 19.8 t ADT: 450

TR 327 MFT108TR

Poor

Over: LOUIS CREEK

.5MI S .3W BUCKLEY, Iroquois, IL

Built 1960 Load: 19.8 t ADT: 100

TR 135

Poor

Over: PRAIRE CREEK

2.0M NW GILMAN, Iroquois, IL

Built 1924 Load: 19.8 t ADT: 25

BLACKWOOD DR

Poor

Over: DRAINAGE DITCH

MURPHYSBORO, Jackson, IL

Built 1900 Load: 19.8 t ADT: 10

I 64 EB

Poor

Over: CASEY FK & UN PAC RR

.2 MI E ILL-37, Jefferson, IL

Built 1972 Load: 19.8 t ADT: 6,350

CRESTWOOD ROAD

Poor

Over: BARNES CREEK

7.2 MI N BROOKPORT, Massac, IL

Built 1939 Load: 19.8 t ADT: 200

THORNE RD

Poor

Over: KISHWAUKEE RIV

3.0 MI W OF MARENGO, McHenry, IL

Built 1992 Load: 19.8 t ADT: 275

TR-179

Poor

Over: Creek

3.5 MI E JACKSONVILL, Morgan, IL

Built 1970 Load: 19.8 t ADT: 50

TR 135

Poor

Over: DRAINAGE DITCH

1 MI W IVESDALE, Piatt, IL

Built 1955 Load: 19.8 t ADT: 50

TR 15

Poor

Over: FOUNTAIN CREEK BR

6 MI SE RANKIN, Vermilion, IL

Built 1965 Load: 19.8 t ADT: 50

FAS-800

Poor

Over: ELM RIVER

1.3 MI E ENTERPRISE, Wayne, IL

Built 1948 Load: 19.8 t ADT: 800

IL 7

Poor

Over: S&S CANAL/DES PLNS R

0.5 M W OF IL 171, Will, IL

Built 1971 Load: 19.8 t ADT: 24,400

TR 355

Poor

Over: SENACHWINE CREEK

4.5 MI S OF TISKILWA, Bureau, IL

Built 1954 Load: 20.1 t ADT: 50

Montgomery Co TR 7

Poor

Over: Bear Creek

2 MI E HARVEL, Christian, IL

Built 1926 Load: 20.1 t ADT: 25

CITY STREET

Poor

Over: BUTTER CREEK

ALBION, Edwards, IL

Built 1909 Load: 20.1 t ADT: 200

TR 19

Poor

Over: STREAM

1210E,2900N, Ford, IL

Built 1996 Load: 20.1 t ADT: 50

BORDWINE RD - TR 3

Poor

Over: BIG CREEK

SE-25-T6NR3E, Fulton, IL

Built 1984 Load: 20.1 t ADT: 25

TR-113 BRACEVILLE

Poor

Over: W. FORK MAZON RIVER

.19 MI W TYNAN RD, Grundy, IL

Built 1910 Load: 20.1 t ADT: 150

TR 243

Poor

Over: TRIB OF W FK BEAR CR

1.5 MI S ELVASTON, Hancock, IL

Built 1999 Load: 20.1 t ADT: 50

FAU 9707 (UNMARKED

Poor

Over: CRABORCHARD CREEK

1.75 M E CARBONDALE, Jackson, IL

Built 1920 Load: 20.1 t ADT: 3,500

RD TO LANDFILL

Poor

Over: ILL RV BACK WATER

E 209TH N 2605, LaSalle, IL

Built 1932 Load: 20.1 t ADT: 75

FAS-806

Poor

Over: EAGLE BRANCH

4 MI SE CHAUNCEY, Lawrence, IL

Built 1945 Load: 20.1 t ADT: 150

CH-12

Poor

Over: OTTER POND DRAIN DT

1.5 MI NE LAWRENCEVL, Lawrence, IL

Built 1931 Load: 20.1 t ADT: 50

TR-222 (THORPE RD)

Poor

Over: BEACH CREEK

1.0 MI S OGLE CO L, Lee, IL

Built 1971 Load: 20.1 t ADT: 50

IL 111

Poor

Over: PIASA CREEK

0.2 M S JCT IL 16, Macoupin, IL

Built 1929 Load: 20.1 t ADT: 4,200

EAST ST

Poor

Over: TOWN BROOK

EAST ST AT CR, Morgan, IL

Built 1979 Load: 20.1 t ADT: 1,100

TR 293

Poor

Over: BAY CREEK

4.0 MI E PITTSFIELD, Pike, IL

Built 1970 Load: 20.1 t ADT: 50

FAS 469-CH 9

Poor

Over: LITTLE MACKINAW RV

NE-15-T23NR5W, Tazewell, IL

Built 1961 Load: 20.1 t ADT: 675

TR 243

Poor

Over: STONY CREEK

1.5 NW MUNCIE, Vermilion, IL

Built 1918 Load: 20.1 t ADT: 50

TOWNSHIP ROAD 3

Poor

Over: SILVER CREEK

7 MI S OF BUDA, Bureau, IL

Built 1970 Load: 20.4 t ADT: 20

N OLD GALENA TRAIL

Poor

Over: PLUM RIVER

5 M NW MT CARROLL, Carroll, IL

Built 1955 Load: 20.4 t ADT: 50

Showing 25,951-26,000 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.