State profile · Near median Poor share

Illinois bridge safety

Condition ratings, load ratings, and Poor-condition data for every public highway bridge in Illinois, based on the FHWA National Bridge Inventory.

27,743
Public bridges
41.2%
Good condition
7.9%
Poor condition

Data updated May 2026

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 whose lowest applicable component is rated 0-4

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 - Poor-condition share 26.3%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Condition Distribution

Illinois48.2%42.6%9.2%GoodFairPoor
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 by Poor-condition share (lower share = better)

States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below Illinois on the same metric.

RI

Rhode Island

7.69% top marginal rate
Structure
Progressive
Burden @ $100K
$78

NE

Nebraska

7.73% top marginal rate
Structure
Progressive
Burden @ $100K
$15,571
Selected

IL

Illinois

7.88% top marginal rate
Structure
Progressive
Burden @ $100K
$27,743

MA

Massachusetts

7.96% top marginal rate
Structure
Progressive
Burden @ $100K
$5,314

MO

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 the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.

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

Poor

Over: WILSON CREEK

NE-35-T3NR2E, Fulton, IL

Built 1935 Load: 1.3 t ADT: 10

TR 10-B

Poor

Over: KING CREEK

W EDGE OF MINERAL, Bureau, IL

Built 1899 Load: 1.6 t ADT: 10

TR-6

Poor

Over: DRAINAGE DITCH

3.5 MI NE DIETERICH, Effingham, IL

Built 1909 Load: 1.6 t ADT: 25

TR208K(TWIN BRIDGE

Poor

Over: BIG CREEK

NE EDGE MT ZION, Macon, IL

Built 1967 Load: 1.9 t ADT: 375

All Bridges in Illinois

TR 1A - HANCOCK CO

Poor

Over: CAMP CREEK

5 MI E DALLAS CITY, Henderson, IL

Built 1917 ADT: 75

TR 93

Poor

Over: GREEN RIVER TRIB

2.0 MI NW GENESEO, Henry, IL

Built 1935 ADT: 150

TR 297

Poor

Over: BR OF EDWARDS RIVER

6.0 MI SE CAMBRIDGE, Henry, IL

Built 1960 ADT: 50

TR 406

Poor

Over: BR MUD CREEK

3.0 MI SW ANNAWAN, Henry, IL

Built 1961 ADT: 50

TR-426 A

Poor

Over: W Fork Spoon River

1.0 MI E KEWANEE, Henry, IL

Built 1962 ADT: 125

TR 293

Poor

Over: LITTLE MUD CREEK

3MI N 2.75 W CISSNA, Iroquois, IL

Built 1971 ADT: 25

TR 126

Poor

Over: MUD CR

0.5 W CISSNA P, Iroquois, IL

Built 1954 ADT: 50

TR 108

Poor

Over: LANGAN CREEK

1.5N O.SW OF CLIFTON, Iroquois, IL

Built 1983 ADT: 50

TR 420A

Poor

Over: TRIB TO IROQUOIS RV

N. EDGE OF IROQUOIS, Iroquois, IL

Built 1930 ADT: 25

TR 104

Poor

Over: TRIB TO SPRING CR

2 MI N US 45&24-2 MI, Iroquois, IL

Built 1956 ADT: 25

TR 192

Poor

Over: WHISKEY CR

1 MI NE CLAYTONVILLE, Iroquois, IL

Built 1896 ADT: 25

TR 320

Poor

Over: MARTINTON DITCH #3

2.5MI E MARTINTON, Iroquois, IL

Built 1955 ADT: 25

TR 242

Poor

Over: MUD CR

5 MI SW MILFORD, Iroquois, IL

Built 1917 ADT: 25

TR 2 D

Poor

Over: TRIB TO SUGAR CR

.5 MI N CH 9, Iroquois, IL

Built 1965 ADT: 50

CH 6

Poor

Over: WILEY CR

6.3 MI NW KANKAKEE, Kankakee, IL

Built 1964 ADT: 750

TR 57

Poor

Over: TRIB TO WALNUT CREEK

NW-34-T13NR4E, Knox, IL

Built 1900 ADT: 25

DILLEYS ROAD

Poor

Over: MILL CREEK

.13 E OF TOLL RD, Lake, IL

Built 2002 ADT: 5,600

MS-4061 (BEECH ST)

Poor

Over: RAVINE

1.5 M N LAKE COOK RD, Lake, IL

Built 1957 ADT: 300

GREENWOOD AVE

Poor

Over: UPRR

0.5 M E SHERIDAN RD, Lake, IL

Built 1972 ADT: 250

US 34 /FAP 68

Poor

Over: LITTLE INDIAN CREEK

3.6 MI NE/ILL 23 (S), LaSalle, IL

Built 1952 ADT: 4,100

ROCKWELL RD

Poor

Over: VERMILION RIVER

E OF UNION ST, LaSalle, IL

Built 1940 ADT: 250

MS-7711 (GLENN ST)

Poor

Over: LONG CREEK

GLENN OV LONG CR, LaSalle, IL

Built 1964 ADT: 525

TR-58

Poor

Over: THE SLOUGH

4 MI ESE CHAUNCEY, Lawrence, IL

Built 1909 ADT: 25

TR 1(LAKE FORK RD)

Poor

Over: DITCH

DEWITT CO LINE, Macon, IL

Built 1963 ADT: 20

TR 32(ARCHERY CLUB

Poor

Over: MOSQUITO CREEK

1.9 MI NE BLUE MOUND, Macon, IL

Built 1909 ADT: 25

TR 1A(LAKE FORK RD

Poor

Over: FRIENDS CREEK

5.3 MI N OF ARGENTA, Macon, IL

Built 1978 ADT: 25

TR 30(STRAWN RD)

Poor

Over: LAKE FORK CREEK

9.0 MI W MAROA, Macon, IL

Built 1976 ADT: 50

CH 36

Poor

Over: E.FK. OTTER CK.

3.0 MI NW NILWOOD, Macoupin, IL

Built 1959 ADT: 450

CH 11

Poor

Over: MASSA CRK.

.5 E 2.5 S PALMYRA, Macoupin, IL

Built 1940 ADT: 150

TR 13

Poor

Over: SUGAR CREEK

5 MI W VIRDEN, Macoupin, IL

Built 1900 ADT: 20

TR-55

Poor

Over: Solomon Creek

NW Edge Palmyra, Macoupin, IL

Built 1962 ADT: 20

TR 205

Poor

Over: CREEK

1 N 3E CARLINVILLE, Macoupin, IL

Built 1965 ADT: 150

TR 285

Poor

Over: HONEY CRK.

3E 4S CARLINVILLE, Macoupin, IL

Built 1900 ADT: 35

TR 510/BIERMAN ROA

Poor

Over: SHAW PT BR

7 E. 1.S. CARLINVILL, Macoupin, IL

Built 1900 ADT: 20

TR 98

Poor

Over: SOLOMON CR

1 MI N HETTICK, Macoupin, IL

Built 1977 ADT: 100

SILVER CRK RD/TR 1

Poor

Over: SILVER CK

2.0MI SE LIVINGSTON, Madison, IL

Built 1901 ADT: 125

TR-6

Poor

Over: EAST FORK KASKASKIA

1.5 MI NW FAIRMAN, Marion, IL

Built 1961 ADT: 75

TR-6

Poor

Over: LOST CREEK

1 MI NW SANDOVAL, Marion, IL

Built 1959 ADT: 100

TR-358

Poor

Over: KASKASKIA RIVER

1.5 MI N KINMUNDY, Marion, IL

Built 1909 ADT: 25

TR-213

Poor

Over: LOST CREEK

1 MI N SANDOVAL, Marion, IL

Built 1972 ADT: 25

TR-445A

Poor

Over: ICG RR

2.5 MI S HELM, Marion, IL

Built 1909 ADT: 10

ILL 117

Poor

Over: SOUTH BR CROW CREEK

6.75 MI S OF ILL 17, Marshall, IL

Built 1932 ADT: 650

TR 128 (TH-S47)

Poor

Over: N BRANCH CROW CREEK

T29N-R1W-3PM SEC 2, Marshall, IL

Built 1962 ADT: 75

TR 208

Poor

Over: SLEEPY HOLLOW DITCH

4 SW OF MASON CITY, Mason, IL

Built 1986 ADT: 25

TR 82

Poor

Over: ICG RR

3 MI.S.BIG BAY STA., Massac, IL

Built 1900 ADT: 25

TR 225

Poor

Over: E.F. LAMOINE RIVER

CTR-11-T5NRN4W, McDonough, IL

Built 1900 ADT: 125

WHITE OAKS RD

Poor

Over: W BRANCH PISCASAW CR

1.8 MI N PERKINS RD, McHenry, IL

Built 1947 ADT: 50

PIONEER RD

Poor

Over: NIPPERSINK CREEK

0.7 M S W SOLON RD, McHenry, IL

Built 1982 ADT: 325

VANDER KARR RD

Poor

Over: BR OF NIPPERSINK CR

2 MI E OF IL 47, McHenry, IL

Built 1981 ADT: 1,550

GRAF ROAD

Poor

Over: PISCASAW CREEK

0.4 MI E OF MAXON RD, McHenry, IL

Built 1998 ADT: 375

Showing 25,601-25,650 of 27,743 bridges

Related

All states → | National rankings → | Understanding conditions → | Retired SD term explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.

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). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.

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.

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.