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-58

Fair

Over: PIGEON ROOST CK

0.5M NW OLIVE BRANCH, Alexander, IL

Built 1954 Load: 16.8 t ADT: 500

FAS 754

Fair

Over: NOLTE CREEK

3.2 M SE OF BRUSSELS, Calhoun, IL

Built 1957 Load: 16.8 t ADT: 600

TR 251

Fair

Over: KELLER BRANCH

5MI S TAYLORVILLE, Christian, IL

Built 1956 Load: 16.8 t ADT: 50

TR 312

Fair

Over: STREAM

2.5 MI E PITTWOOD, Iroquois, IL

Built 1954 Load: 16.8 t ADT: 50

FAS-705

Fair

Over: TRIB POND GROVE CK

1.3 MI S STE MARIE, Jasper, IL

Built 1916 Load: 16.8 t ADT: 1,400

COUNTY HIGHWAY 30

Fair

Over: OVER-FLOW LAKE STORY

N1/2-32-T12NR1E, Knox, IL

Built 1928 Load: 16.8 t ADT: 375

MS-4101 Dean Avenu

Fair

Over: RAVINE

1.5 N CO LINE, Lake, IL

Built 1928 Load: 16.8 t ADT: 900

COTTAGE HILL ROAD

Fair

Over: UNNAMED CREEK

0.3 M W ANGLING RD, Lee, IL

Built 1963 Load: 16.8 t ADT: 75

TR 239(WELLS RD)

Fair

Over: SAND CREEK

3 MI E 3 MI N MACON, Macon, IL

Built 1968 Load: 16.8 t ADT: 50

TR 250

Fair

Over: HENDERSON CREEK

W.CTR-17-T13NR1W, Mercer, IL

Built 1957 Load: 16.8 t ADT: 10

TR 78

Fair

Over: WILLOW CRK.

3 MI W JACKSONVILLE, Morgan, IL

Built 1900 Load: 16.8 t ADT: 175

LAUREL ST

Fair

Over: JACKSONVILLE BR

20FT W OUTER PK DR, Sangamon, IL

Built 1967 Load: 16.8 t ADT: 1,800

ILL 127 & ILL 146

Fair

Over: STREAM

0.6 MI W. JONESBORO, Union, IL

Built 1933 Load: 16.8 t ADT: 4,800

FAS 331(CH 10)

Fair

Over: STREAM

1.5 MI N OF POTOMAC, Vermilion, IL

Built 1930 Load: 16.8 t ADT: 350

E CYCLONE RIDGE RO

Fair

Over: ROCK CREEK

1 MI S LANARK, Carroll, IL

Built 1954 Load: 17.2 t ADT: 150

FAS 577

Fair

Over: INDIAN RUN

5 MI NNW VIRGINIA, Cass, IL

Built 1947 Load: 17.2 t ADT: 600

FAS 639

Fair

Over: SIMPSONS BRANCH

0.12 MI N PALMER, Christian, IL

Built 1947 Load: 17.2 t ADT: 150

SHERIDAN RD

Fair

Over: N SHORE CHANNEL

2.5 M N ILL 58 P12, Cook, IL

Built 1911 Load: 17.2 t ADT: 9,400

PRIVATE ENTR.

Fair

Over: THOMPSON LAKE DIT

2 MI N JCT 136 ENT, Fulton, IL

Built 1935 Load: 17.2 t ADT: 10

TR 300

Fair

Over: TRIB OF LA MOINE R

0.2 MI N OF LA HARPE, Hancock, IL

Built 1908 Load: 17.2 t ADT: 75

FAP-312 (IL-3)

Fair

Over: Stream

1.8M E RANDOLPH CL, Jackson, IL

Built 1933 Load: 17.2 t ADT: 2,150

MS-3600

Fair

Over: BIG MUDDY CREEK

WHEELER, Jasper, IL

Built 1970 Load: 17.2 t ADT: 125

US 45

Fair

Over: STREAM

1 MI.S.NEW BURNSIDE, Johnson, IL

Built 1922 Load: 17.2 t ADT: 1,750

TR 298

Fair

Over: S FORK LAKE FORK CK

3.5 S 1 MI E NARITA, Logan, IL

Built 1955 Load: 17.2 t ADT: 20

TR 3

Fair

Over: LOCAL DRAINAGE

1 MI N 3 MI E EMDEN, Logan, IL

Built 1962 Load: 17.2 t ADT: 25

CH 34

Fair

Over: OTTER CREEK

HAGAMAN, Macoupin, IL

Built 1936 Load: 17.2 t ADT: 50

TR 6-ANDERSON PIT

Fair

Over: PATERSON BRANCH

1.55 MI NW HILLERMAN, Massac, IL

Built 1900 Load: 17.2 t ADT: 25

AGNEW RD

Fair

Over: DRAINAGE

AGNEW RD N@US 30, Whiteside, IL

Built 1939 Load: 17.2 t ADT: 25

WOLF CREEK ROAD

Fair

Over: CRAB ORCHARD LAKE

2.5 MI SW OF HDQRTRS, Williamson, IL

Built 1938 Load: 17.2 t ADT: 150

TR 53

Fair

Over: CEDAR CRK.

2.0 MI NE LAPRAIRIE, Adams, IL

Built 1905 Load: 17.5 t ADT: 75

TR 542

Fair

Over: CREEK

1.6 MI SE CLAYTON, Adams, IL

Built 1905 Load: 17.5 t ADT: 25

TR 247

Fair

Over: FLAT BR CREEK

2.5 MI WEST TOMALCO, Bond, IL

Built 1975 Load: 17.5 t ADT: 100

TR 247

Fair

Over: TRIB TO CARLYLE LAKE

1.75M N OFKEYESPORT, Bond, IL

Built 1974 Load: 17.5 t ADT: 75

TR-209

Fair

Over: TRIB OF SPRING BR

5MI N OF KEYSPORT, Bond, IL

Built 1970 Load: 17.5 t ADT: 150

CH 4

Fair

Over: PLOW HOLLOW CREEK

1 MI S TISKILWA, Bureau, IL

Built 1943 Load: 17.5 t ADT: 550

TR 222

Fair

Over: W. BUREAU CREEK

6 MI. N.W. PRINCETON, Bureau, IL

Built 1910 Load: 17.5 t ADT: 25

HOPPS STREET

Fair

Over: PIKE CREEK

SE LAMOILLE, Bureau, IL

Built 1923 Load: 17.5 t ADT: 100

TR 104

Fair

Over: STREAM

0.50 NE GOLDEAGLEFRY, Calhoun, IL

Built 1901 Load: 17.5 t ADT: 25

MSS 6120

Fair

Over: STREAM

N COUNTY RD INHARDIN, Calhoun, IL

Built 1950 Load: 17.5 t ADT: 125

N FLORY ROAD

Fair

Over: WEST FORK

6 MILES EAST LANARK, Carroll, IL

Built 1921 Load: 17.5 t ADT: 25

E COOK ROAD

Fair

Over: OTTER CREEK

4 MI E CHADWICK, Carroll, IL

Built 1920 Load: 17.5 t ADT: 50

E SCHELL ROAD

Fair

Over: BRANCH OF ELKHORN CR

2 MI SE MILLEDGEVILL, Carroll, IL

Built 1920 Load: 17.5 t ADT: 150

TR 196

Fair

Over: TOOLE CREEK

2MI NW OWANECO, Christian, IL

Built 1919 Load: 17.5 t ADT: 425

TR 167

Fair

Over: GRASSY BRANCH

2MI. N.W. GTOWN, Clinton, IL

Built 1968 Load: 17.5 t ADT: 450

TR 251/W. TENTH ST

Fair

Over: SEWER CREEK

.25 MI. S. CENTRALIA, Clinton, IL

Built 1970 Load: 17.5 t ADT: 275

FAS 676(CH 5)

Fair

Over: W BR HURRICANE CREEK

1.20 MI S FAS 675, Coles, IL

Built 1941 Load: 17.5 t ADT: 325

108TH AVE

Fair

Over: MARLEY CR

0.5 M N 167TH, Cook, IL

Built 1900 Load: 17.5 t ADT: 7,500

SEE GWUN AVE

Fair

Over: WELLER CR

0.5 M N ILL 58 P5, Cook, IL

Built 1970 Load: 17.5 t ADT: 1,150

TR 93

Fair

Over: CREEK

4 MI N OBLONG, Crawford, IL

Built 1914 Load: 17.5 t ADT: 50

FAU-8320

Fair

Over: CREEK

ROBINSON, Crawford, IL

Built 1909 Load: 17.5 t ADT: 2,200

Showing 4,251-4,300 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.