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

FAP-328 (US-45)

Poor

Over: LOST CREEK

1.5 MI N ENFIELD, White, IL

Built 1928 Load: 26.6 t ADT: 1,750

HAMBORG ROAD

Poor

Over: STONEBRIDGE TRAIL

0.25 M E OF I-90, Winnebago, IL

Built 1981 Load: 26.6 t ADT: 1,100

TR 207

Poor

Over: PANTHER CREEK

I100 EAST 800 NORTH, Woodford, IL

Built 1977 Load: 26.6 t ADT: 200

TR 195

Poor

Over: BRUSH CREEK

2 MI W OF CHERRY, Bureau, IL

Built 1955 Load: 26.9 t ADT: 75

WILLOW RD

Poor

Over: W F N BR CHICAGO RIV

1.3 M W IL 43, Cook, IL

Built 1941 Load: 26.9 t ADT: 31,700

FAS 868 (Ewing Rd)

Poor

Over: Sugar Camp Creek

3.5M E of Ewing, Franklin, IL

Built 1936 Load: 26.9 t ADT: 1,000

CH-41

Poor

Over: Granary Creek

ESSEX WLN SEC 7, Grundy, IL

Built 1977 Load: 26.9 t ADT: 950

FAI-57 SB

Poor

Over: PRAIRIE CREEK

6.18 MI S OF ILL 116, Iroquois, IL

Built 1967 Load: 26.9 t ADT: 9,050

FAS 1343 CH 41

Poor

Over: BRANCH SUGAR CREEK

1.6 MI S STOCKLAND, Iroquois, IL

Built 1959 Load: 26.9 t ADT: 175

TR 1

Poor

Over: TRIB TO PIGEON CR

0.5 MI E 49 ON CO LN, Iroquois, IL

Built 1981 Load: 26.9 t ADT: 50

TR 310

Poor

Over: WOLF CREEK

E 18TH N 1625, LaSalle, IL

Built 1964 Load: 26.9 t ADT: 400

WILLETT AVE DIXON

Poor

Over: PLUM CR

0.2 MI N OF ILL RT 2, Lee, IL

Built 1959 Load: 26.9 t ADT: 325

LATHAM-RALSTON RD

Poor

Over: ROCK RIVER

1 MI. E. ILL 2, Winnebago, IL

Built 1969 Load: 26.9 t ADT: 8,200

TR 2

Poor

Over: LAWSON CREEK

2 MI W OF SHEFFIELD, Bureau, IL

Built 1925 Load: 27.2 t ADT: 50

TR 107 A

Poor

Over: UPPER SALT FORKDIT

3 MI NE OF SELLERS, Champaign, IL

Built 1979 Load: 27.2 t ADT: 100

CH 6-FAS 642

Poor

Over: LONG BRANCH

6.75 M E TAYLORVILLE, Christian, IL

Built 1923 Load: 27.2 t ADT: 1,300

I-290 EB (SB)

Poor

Over: RR - UP (SOUTH)

0.6 M S IL 64, Cook, IL

Built 1958 Load: 27.2 t ADT: 59,750

CENTRAL AVE.

Poor

Over: SAN.DRAIN.&SHIP CAN.

0.15M.N.OF I-55, Cook, IL

Built 1970 Load: 27.2 t ADT: 9,000

LOOMIS ST

Poor

Over: S BR CHICAGO RIVER

2470 S 1400 W, Cook, IL

Built 1904 Load: 27.2 t ADT: 3,675

US 136

Poor

Over: ILLINOIS RIVER

W EDGE OF HAVANA, Fulton, IL

Built 1936 Load: 27.2 t ADT: 5,250

TR 239

Poor

Over: L. CRAB ORCHARD CRK.

0.5MI.W.US51N.LMTCDL, Jackson, IL

Built 1984 Load: 27.2 t ADT: 450

TR 18

Poor

Over: PARIRIE CREEK

2895 N, 400 E, Livingston, IL

Built 1945 Load: 27.2 t ADT: 50

MT MORRIS RD

Poor

Over: MUD CREEK

2 MI NW LEAF RIVER, Ogle, IL

Built 1971 Load: 27.2 t ADT: 100

MT VERNON ROAD

Poor

Over: BR LEAF RIVER

1.0 M N HARPER, Ogle, IL

Built 1977 Load: 27.2 t ADT: 150

CO HWY 11

Poor

Over: BEAUCOUP CREEK

2.1 MI E OF ILL 127, Perry, IL

Built 1955 Load: 27.2 t ADT: 250

TR 119

Poor

Over: MARY'S RIVER

TR119 OVER MARY'S RV, Randolph, IL

Built 1965 Load: 27.2 t ADT: 275

FAS 465-CH 8

Poor

Over: W FORK SUGAR CREEK

NW-28-T22NR2W, Tazewell, IL

Built 1937 Load: 27.2 t ADT: 300

IL 53

Poor

Over: DES PLAINES RIVER

1.2 MI S IL 7, Will, IL

Built 1935 Load: 27.2 t ADT: 21,300

SIMPSON ROAD

Poor

Over: FULLERS CR

0.2 MI E PRAIRIE RD, Winnebago, IL

Built 1959 Load: 27.2 t ADT: 700

W WACKER ROAD

Poor

Over: JOHNSON CREEK

2 MI SW MT CARROLL, Carroll, IL

Built 1982 Load: 27.5 t ADT: 100

TR 287 A

Poor

Over: STREAM

4 MI NW OF ALLERTON, Champaign, IL

Built 1988 Load: 27.5 t ADT: 50

TR 51

Poor

Over: ROCK CREEK

2.4 MI ENE WAYNESVIL, De Witt, IL

Built 1964 Load: 27.5 t ADT: 25

MAIN ST (MS#2300)

Poor

Over: EMBARRAS RIVER

W EDGE OF CAMARGO, Douglas, IL

Built 1955 Load: 27.5 t ADT: 225

TR 48A BRENTON

Poor

Over: STREAM

1300E 2270N, Ford, IL

Built 1973 Load: 27.5 t ADT: 50

TR-84 WARD RD

Poor

Over: JOHNNY RUN

.43 MI S PRAIRIE RD, Grundy, IL

Built 1978 Load: 27.5 t ADT: 75

CH 11

Poor

Over: Trib to Raccoon Cree

6 MI SW Bridgeport, Lawrence, IL

Built 1934 Load: 27.5 t ADT: 35

FAS 1571

Poor

Over: SALT CREEK

5.0 MI NE GREENVIEW, Menard, IL

Built 1978 Load: 27.5 t ADT: 100

COLUMBIAN ROAD

Poor

Over: PINE CREEK

7.0 MI E OF POLO, Ogle, IL

Built 1985 Load: 27.5 t ADT: 100

ILL 157

Poor

Over: LITTLE CANTEEN CREEK

IN CASEYVILLE, St. Clair, IL

Built 1929 Load: 27.5 t ADT: 10,900

TR.186

Poor

Over: PANTHER CREEK

2125 EAST 1275 NORTH, Woodford, IL

Built 1976 Load: 27.5 t ADT: 100

FAS 1358 CH 6

Poor

Over: E BR PANTHER CREEK

0.75 MI N EL PASO, Woodford, IL

Built 1983 Load: 27.5 t ADT: 300

TR 176

Poor

Over: LAKE FORK CK FLD PLN

1 W 1.5 S MI LAKE FK, Logan, IL

Built 1965 Load: 27.7 t ADT: 100

TR 362A

Poor

Over: BEAR CRK

2.6 MI NW CAMP POINT, Adams, IL

Built 1967 Load: 27.9 t ADT: 100

FAS 1672(CH 16)

Poor

Over: CREEK

2.0 E HUMBOLDT, Coles, IL

Built 1982 Load: 27.9 t ADT: 225

TR 60B PELLA

Poor

Over: PELLA DRAINAGE DITCH

2910N,1600E, Ford, IL

Built 1980 Load: 27.9 t ADT: 25

FAS 457-CH 9

Poor

Over: EAST CREEK

NW-12-T4NR3E, Fulton, IL

Built 1958 Load: 27.9 t ADT: 525

MINOOKA RD FAU400

Poor

Over: TRIB TO AUX SABLE CR

.32 MI E BRISBIN RD, Grundy, IL

Built 1984 Load: 27.9 t ADT: 600

BROWN ROAD TR-150

Poor

Over: WALLEY RUN

.9 MI S MINOOKA RD, Grundy, IL

Built 1979 Load: 27.9 t ADT: 75

GOODFARM RD TR 155

Poor

Over: E FORK MAZON RIVER

.96 MI E STORM RD, Grundy, IL

Built 1978 Load: 27.9 t ADT: 50

FAS 431

Poor

Over: MUD CREEK

2.3 MI S. OF WEST PO, Hancock, IL

Built 1959 Load: 27.9 t ADT: 200

Showing 26,301-26,350 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.