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

CH 39

Poor

Over: S. EDWARDS RIVER

BISHOP HILL, Henry, IL

Built 1969 Load: 21.4 t ADT: 650

SENECA ST#2300

Poor

Over: STREAM

N 2553,E 2890, LaSalle, IL

Built 1965 Load: 21.4 t ADT: 1,600

TR-222

Poor

Over: TRIB INDIAN CR

E 1250TH N 4630, LaSalle, IL

Built 1977 Load: 21.4 t ADT: 250

BULL VALLEY ROAD

Poor

Over: BOONE CREEK

0.2 MI E OF CURRAN R, McHenry, IL

Built 1969 Load: 21.4 t ADT: 9,300

TR 128

Poor

Over: SPOON CREEK

2 MI W WOODSON, Morgan, IL

Built 1961 Load: 21.4 t ADT: 100

FAU 9168

Poor

Over: RICHLAND CREEK

0.3 M N OF SHILOH RD, St. Clair, IL

Built 1966 Load: 21.4 t ADT: 8,950

TR 42 A

Poor

Over: STREAM

1 MI SE ARMSTRONG, Vermilion, IL

Built 1943 Load: 21.4 t ADT: 35

TR 312

Poor

Over: Masters Fork

4 MI W OF LA MOILLE, Bureau, IL

Built 1915 Load: 21.7 t ADT: 25

TR 68

Poor

Over: SPOON RIVER EAST FOR

1.5 MI. SE. NEPONSET, Bureau, IL

Built 1965 Load: 21.7 t ADT: 25

TR 89

Poor

Over: STREAM

4.5 MI NE THOMASBORO, Champaign, IL

Built 1982 Load: 21.7 t ADT: 25

TR-450

Poor

Over: NORTH FORK CREEK

5 MI W FARINA, Fayette, IL

Built 1940 Load: 21.7 t ADT: 50

TR 2

Poor

Over: DRAINAGE DITCH

6.0 W TIOGA, Hancock, IL

Built 1974 Load: 21.7 t ADT: 75

TR 291

Poor

Over: SWAB RUN CREEK

SW-25-T10NR4E, Knox, IL

Built 1971 Load: 21.7 t ADT: 10

I-39 NB/US 51 NB

Poor

Over: TOMAHAWK CREEK

3.5 MI N OF I-80, LaSalle, IL

Built 1979 Load: 21.7 t ADT: 9,300

TR-43

Poor

Over: SOMONAUK CREEK

N 45TH E 2602, LaSalle, IL

Built 1953 Load: 21.7 t ADT: 100

TR 248

Poor

Over: DRAINAGE DITCH

1445 N, 3000 E, Livingston, IL

Built 1960 Load: 21.7 t ADT: 25

TR 35

Poor

Over: LOCAL DRAINAGE

2 MI S 2 MI E UNION, Logan, IL

Built 1960 Load: 21.7 t ADT: 35

39TH AVE

Poor

Over: DRAINAGE DITCH

W EDGE OF 27TH ST, Rock Island, IL

Built 1972 Load: 21.7 t ADT: 1,600

SB ILL 116

Poor

Over: SPRING CREEK

ON ILL116 NE FR US24, Tazewell, IL

Built 1965 Load: 21.7 t ADT: 17,200

HOFFMAN RD - TR 11

Poor

Over: STREAM

S.CTR-18-T24NR2W, Tazewell, IL

Built 1963 Load: 21.7 t ADT: 250

FAS-799 (CH-3)

Poor

Over: LITTLE MUDDY CREEK

2 MI W SAILER SPRING, Clay, IL

Built 1941 Load: 22.0 t ADT: 425

TR 388

Poor

Over: THOMPSON RESERVOIR

TR 388 OV THOMP RES, Franklin, IL

Built 1900 Load: 22.0 t ADT: 50

TR 753

Poor

Over: BRANCH SPOON RIVER

SE-22-T4NR3E, Fulton, IL

Built 1949 Load: 22.0 t ADT: 50

TR 170

Poor

Over: BIG MEADOW DITCH

3.1 MI S OF CARTHAGE, Hancock, IL

Built 1929 Load: 22.0 t ADT: 50

TR 22B

Poor

Over: LOUIS CREEK

.8MI S CH9 1MIW US45, Iroquois, IL

Built 1964 Load: 22.0 t ADT: 25

E SCHAPVILLE RD

Poor

Over: MILL CREEK

SCHAPVILLE, Jo Daviess, IL

Built 1965 Load: 22.0 t ADT: 350

TOWNSHIP ROAD NO.

Poor

Over: MENOMINEE RIVER

3 M NE E DUBUQUE, Jo Daviess, IL

Built 1968 Load: 22.0 t ADT: 1,150

NORTH FORD ROAD

Poor

Over: E FORK GALENA RIVER

4 MI NE OF GALENA, Jo Daviess, IL

Built 1983 Load: 22.0 t ADT: 100

CH 3

Poor

Over: DEER CR

3 MI W ST ANNE, Kankakee, IL

Built 1969 Load: 22.0 t ADT: 475

TR 184

Poor

Over: TRIB TO VERMILION R

1010N, 2100 EURY, Livingston, IL

Built 1966 Load: 22.0 t ADT: 25

TR0001H

Poor

Over: EAST FORK MAZON RIV

3390 E, 3300 N, Livingston, IL

Built 1977 Load: 22.0 t ADT: 350

TR 72

Poor

Over: PRAIRIE CREEK

.5 MI N EMDEN, Logan, IL

Built 1988 Load: 22.0 t ADT: 150

MELODY LANE

Poor

Over: SILVER CREEK

0.09M.W. OFIL-47, McHenry, IL

Built 1984 Load: 22.0 t ADT: 1,050

TR 156(FAS 1530)

Poor

Over: DRAINAGE DITCH

3.5 MI E BEMENT, Piatt, IL

Built 1962 Load: 22.0 t ADT: 50

TR 512

Poor

Over: BUCKHORN CREEK

2.5 NE PEARL, Pike, IL

Built 1920 Load: 22.0 t ADT: 20

TR 250

Poor

Over: BAY CR TRIB

1.5 M SW NEWSALEM, Pike, IL

Built 2007 Load: 22.0 t ADT: 25

CH 16(FAS 648)

Poor

Over: FLAT BRANCH

4 MI NW YANTISVILLE, Shelby, IL

Built 1942 Load: 22.0 t ADT: 350

LAKE WINDMERE-TR10

Poor

Over: PRAIRIE CREEK

SE-17-T24NR3W, Tazewell, IL

Built 1967 Load: 22.0 t ADT: 775

JACKSON ST

Poor

Over: DES PLAINES RIVER

1.5 MI NO. OF I-80, Will, IL

Built 1932 Load: 22.0 t ADT: 2,550

FAS 366 CH 12

Poor

Over: RICHLAND CR

1.79 MI E of IL26, Woodford, IL

Built 1991 Load: 22.0 t ADT: 300

COTTAGE GROVE AVE

Poor

Over: DEER CR

1.25 N JOE ORR P2, Cook, IL

Built 1932 Load: 22.4 t ADT: 5,100

TR-469

Poor

Over: LITTLE HICKORY CREEK

5 MI NE SHOBONIER, Fayette, IL

Built 1930 Load: 22.4 t ADT: 50

CH 8 GALLAHUE

Poor

Over: STREAM

1210E,2800N, Ford, IL

Built 1958 Load: 22.4 t ADT: 50

CO HWY 31

Poor

Over: MIDDLE CREEK

2.0 MI NE MIDDLE CR, Hancock, IL

Built 1970 Load: 22.4 t ADT: 100

TR 244

Poor

Over: SPRING CREEK

3.0 MI W LAHARPE, Hancock, IL

Built 1983 Load: 22.4 t ADT: 125

TR 30

Poor

Over: W. BR LANGAN CR

0.25 MI N. CH 4, Iroquois, IL

Built 1965 Load: 22.4 t ADT: 50

SCHLAPP RD/MS 360

Poor

Over: E.AUX SABLE CR.

2.5 MI S OF ILL 126, Kendall, IL

Built 1930 Load: 22.4 t ADT: 850

TR 107B

Poor

Over: WOLF CREEK

1520 E, 2100 N, Livingston, IL

Built 1975 Load: 22.4 t ADT: 150

DRY RIDGE ROAD

Poor

Over: MAIN DITCH

0.9 MI E US 45, Massac, IL

Built 1964 Load: 22.4 t ADT: 25

US 12

Poor

Over: N BR NIPPERSINK CRK

0.5 M S E OF IL 31, McHenry, IL

Built 1990 Load: 22.4 t ADT: 8,250

Showing 26,051-26,100 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.