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-19

Poor

Over: RAMSEY CREEK

3.5 MI NW RAMSEY, Fayette, IL

Built 1929 Load: 10.0 t ADT: 50

TR 171

Poor

Over: SANGAMON RIVER

2.0 E OF CLEAR LAKE, Sangamon, IL

Built 1950 Load: 10.0 t ADT: 175

TR 304

Poor

Over: BRUSH CREEK

3.7 MI NW STEWARDSON, Shelby, IL

Built 1909 Load: 10.0 t ADT: 25

TR 57

Poor

Over: BRANCH OF CAMP CREEK

1.0 MI N COLUSA, Hancock, IL

Built 1925 Load: 10.4 t ADT: 50

TR 311(PIG PEN LAN

Poor

Over: BRANCH HONEY CREEK

1 MI. SO. PITTSFIELD, Pike, IL

Built 1989 Load: 10.4 t ADT: 25

ELM STREET-ROCKFOR

Poor

Over: KENT CREEK

0.5 MI W OF DOWNTOWN, Winnebago, IL

Built 1992 Load: 10.4 t ADT: 35

E KELTNER ROAD

Poor

Over: E FORK PLUM RIVER

.5 MI S COUNTY LINE, Carroll, IL

Built 1886 Load: 10.7 t ADT: 25

US ROUTE 52

Poor

Over: FOX RIVER

2.10 MI W OF ILL 71, LaSalle, IL

Built 1931 Load: 10.7 t ADT: 1,850

TR 56(GLASGOW RD)

Poor

Over: SOUTH FORK CREEK

3.0 MI N WARRENBURG, Macon, IL

Built 1975 Load: 10.7 t ADT: 75

SAMPSON STREET

Poor

Over: PETTIBONE CREEK

0.5 KM S OF DECATUR AVE, Lake, IL

Built 1926 Load: 10.9 t ADT: 1,260

TR-75

Poor

Over: PANTHER CREEK

2 MI S HORD, Clay, IL

Built 1950 Load: 11.0 t ADT: 50

TR 188

Poor

Over: N FORK SALT CREEK

3.3 MI NW OF DEWITT, De Witt, IL

Built 1911 Load: 11.0 t ADT: 25

TR 290

Poor

Over: SPRING CREEK

2.0 NW LAHARPE, Hancock, IL

Built 1911 Load: 11.0 t ADT: 50

US 14

Poor

Over: FLINT CREEK TRIB

0.2 Mi E OF IL 59, Lake, IL

Built 1937 Load: 11.0 t ADT: 24,300

TR-250(ZIMMERMAN R

Poor

Over: TRIB BUREAU CR

3 MI N LASALLE CO L, Lee, IL

Built 1958 Load: 11.0 t ADT: 100

TR 268

Poor

Over: GOUSEBERRY CREEK

2605 N, 3200 E, Livingston, IL

Built 1950 Load: 11.0 t ADT: 100

TR 15

Poor

Over: DEERLICK BR.

SE-7-T15NR4W, Mercer, IL

Built 1900 Load: 11.0 t ADT: 25

RIEKENA RD - TR 24

Poor

Over: LARGENT CREEK

CENT 30 T8NR7E, Peoria, IL

Built 1972 Load: 11.0 t ADT: 175

TR 181

Poor

Over: RICHLAND CREEK

3.7 MI SW WINDSOR, Shelby, IL

Built 1909 Load: 11.0 t ADT: 25

TR-524

Poor

Over: OWENS CREEK

4 MI E FAIRFIELD, Wayne, IL

Built 1909 Load: 11.0 t ADT: 100

PLEASANT VALLEY RD

Poor

Over: KISHWAUKEE RIVER

0.2 MI W OF MCCUE RO, McHenry, IL

Built 1978 Load: 11.3 t ADT: 325

TR 229 A

Poor

Over: BIG GEORGE BRANCH

2MI SW ASSUMPTION, Christian, IL

Built 1900 Load: 11.7 t ADT: 10

TR 109/OLD STATE R

Poor

Over: BEAVER CREEK

1.25 MI N BECKMEYER, Clinton, IL

Built 1930 Load: 11.7 t ADT: 75

S MILL GROVE ROAD

Poor

Over: YELLOW CREEK

3 MI SE PEARL CITY, Stephenson, IL

Built 1931 Load: 11.7 t ADT: 100

TR-112

Poor

Over: DRAINAGE DITCH

3 MI NNE FRIENDSVILL, Wabash, IL

Built 1909 Load: 11.7 t ADT: 10

TR 118

Poor

Over: ROCK CRK.

3.2 MI SE URSA, Adams, IL

Built 1933 Load: 12.0 t ADT: 125

SBI 11 A

Poor

Over: EMBARRAS R OVERFLOW

.5 MI W OF GREENUP, Cumberland, IL

Built 1920 Load: 12.0 t ADT: 200

TR 174

Poor

Over: E FORK OF BIG CREEK

2.8 MI NW OF OLIVER, Edgar, IL

Built 1919 Load: 12.0 t ADT: 75

TR 166

Poor

Over: CAMP CREEK

3.1 MI S DALLAS CITY, Hancock, IL

Built 1923 Load: 12.0 t ADT: 100

ILL 8

Poor

Over: W FORK KICKAPOO CR

.5 MI E OF OAKHILL, Peoria, IL

Built 1932 Load: 12.0 t ADT: 1,850

TR 343

Poor

Over: GRAPE CREEK

1.5 MI E BELGIUM, Vermilion, IL

Built 1968 Load: 12.0 t ADT: 150

TR 725

Poor

Over: GRAPE CREEK

1 MI EAST OF BELGIUM, Vermilion, IL

Built 1966 Load: 12.0 t ADT: 50

TR-1572 Aberdeen R

Poor

Over: Hickory Creek Trib

0.3 MI W OF HARLEM, Will, IL

Built 1980 Load: 12.0 t ADT: 850

TR 245

Poor

Over: COON CREEK

.5 MI S WOODLAND, Iroquois, IL

Built 1916 Load: 12.3 t ADT: 25

TR-92

Poor

Over: B & O RR

0.5 MI W BRIDGEPORT, Lawrence, IL

Built 1920 Load: 12.3 t ADT: 100

OLD, OLD US 36

Poor

Over: Lewis Creek

1.5 W WINCHESTER, Scott, IL

Built 1923 Load: 12.3 t ADT: 75

FAS 1246/CH 24

Poor

Over: COAL CREEK

1.5 MI WEST OF BUDA, Bureau, IL

Built 1955 Load: 12.6 t ADT: 325

TR 184

Poor

Over: N FORK BROUILLETTS C

4.5 MI NNE CHERRY PT, Edgar, IL

Built 1968 Load: 12.6 t ADT: 50

TR-272

Poor

Over: FLAT CREEK

3 MI SE SHOBONIER, Fayette, IL

Built 1915 Load: 12.6 t ADT: 50

ILL 3

Poor

Over: DRAINAGE DITCH

0.4 MI S OF ILL 149, Jackson, IL

Built 1933 Load: 12.6 t ADT: 900

LAKE ROAD

Poor

Over: RAVINE

LAKE RD AT WOODBINE, Lake, IL

Built 1912 Load: 12.6 t ADT: 525

TR 234

Poor

Over: CAMP CREEK

SW-15-T4NR3W, McDonough, IL

Built 1900 Load: 12.6 t ADT: 25

TR-85

Poor

Over: CREEK

3 MI S LANCASTER, Wabash, IL

Built 1909 Load: 12.6 t ADT: 75

TOWNSHIP RD NO 231

Poor

Over: CAMP CREEK

1 MI E MASSBACH, Jo Daviess, IL

Built 1920 Load: 12.8 t ADT: 50

9TH AVE.

Poor

Over: SILVER CREEK

0.2M.S.OF IL-64, Cook, IL

Built 1955 Load: 13.0 t ADT: 9,100

COLFAX ST

Poor

Over: TRIB OF SPRING CR

2 BLKS S.OF US 24, Iroquois, IL

Built 1900 Load: 13.0 t ADT: 125

TR-120

Poor

Over: CREEK

2 MI NW VERNOR LAKE, Richland, IL

Built 1909 Load: 13.0 t ADT: 50

TR 341

Poor

Over: SAND CREEK

2.5 MI NW WINDSOR, Shelby, IL

Built 1980 Load: 13.0 t ADT: 25

TR 350

Poor

Over: MCCRANEY CRK

0.88 mi N CH 10, Adams, IL

Built 1916 Load: 13.3 t ADT: 75

WILLOW ROAD

Poor

Over: MUDDY PLUM RIVER

5.5 M SE STOCKTON, Jo Daviess, IL

Built 1950 Load: 13.3 t ADT: 125

Showing 25,651-25,700 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.