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

STREIT ROAD

Poor

Over: PISCASAW CREEK

0.4 MI E OF COUNTY, McHenry, IL

Built 1959 Load: 22.4 t ADT: 425

TR 230

Poor

Over: CREEK

1.5 MI SW NORTONVILE, Morgan, IL

Built 1981 Load: 22.4 t ADT: 75

AUGUSTIN RD - TR 9

Poor

Over: MUD CREEK

SE-10-T24NR3W, Tazewell, IL

Built 1976 Load: 22.4 t ADT: 50

CH 8/FAS 782

Poor

Over: OWL CREEK

N CORP LIMT MULBERRY, Bond, IL

Built 1947 Load: 22.7 t ADT: 1,100

TR 336

Poor

Over: PIKE CREEK

2.5 MI SW LAMOILLE, Bureau, IL

Built 1910 Load: 22.7 t ADT: 25

FAU 7779

Poor

Over: CLEAR CREEK

3 MI SE BEARDSTOWN, Cass, IL

Built 1968 Load: 22.7 t ADT: 1,650

US 40(FAS 1707)

Poor

Over: N FORK EMBARRAS R

.4MI W MARTINSVILLE, Clark, IL

Built 1954 Load: 22.7 t ADT: 2,450

TR 5

Poor

Over: N FORK EMBARRASS R

3.1 MI NE WESTFIELD, Clark, IL

Built 1909 Load: 22.7 t ADT: 25

HARRISON ST

Poor

Over: ADDISON CR

0.5 MI E US45, Cook, IL

Built 1952 Load: 22.7 t ADT: 1,500

CHATHAM ST

Poor

Over: CAL SLOUGH

0.1 M S 136TH P24, Cook, IL

Built 1963 Load: 22.7 t ADT: 750

Armitage Avenue

Poor

Over: Silver Creek

0.2 MI W of 25TH AVE, Cook, IL

Built 1950 Load: 22.7 t ADT: 4,000

Woodridge Drive

Poor

Over: Crabtree Creek

0.32 MI S ILL 33, DuPage, IL

Built 1986 Load: 22.7 t ADT: 2,900

TR 27 PELLA

Poor

Over: STREAM

1390 E 2600N, Ford, IL

Built 1970 Load: 22.7 t ADT: 75

PARKER RD - TR 335

Poor

Over: BADGER CR

NW-3-T5NR1E, Fulton, IL

Built 1978 Load: 22.7 t ADT: 50

TR 123

Poor

Over: N BRANCH OF LARRY CK

4 M SE NAUVOO, Hancock, IL

Built 1960 Load: 22.7 t ADT: 50

TR 34

Poor

Over: MOSQUITO CREEK

AT WARNER, Henry, IL

Built 1938 Load: 22.7 t ADT: 75

CH 17

Poor

Over: EDWARDS R. TRIB.

2 MI. E. OPHIEM, Henry, IL

Built 1949 Load: 22.7 t ADT: 275

TR-264

Poor

Over: DRAINAGE DITCH

1.4 MI NW ST MARIE, Jasper, IL

Built 1909 Load: 22.7 t ADT: 25

TR-102

Poor

Over: TURKEY CREEK

4.5 MI NW NEWTON, Jasper, IL

Built 1955 Load: 22.7 t ADT: 100

FAU 6166

Poor

Over: EAGLE CREEK

E 16TH N 1399, LaSalle, IL

Built 1960 Load: 22.7 t ADT: 75

CAMPUS RD FAS 343

Poor

Over: E FK MAZON RIVER

1.0 M SO OF RTE 17, Livingston, IL

Built 1952 Load: 22.7 t ADT: 900

FAS 554(CH 32)

Poor

Over: FINLEY CREEK

5.0 MI E OF MACON, Macon, IL

Built 1909 Load: 22.7 t ADT: 1,150

TR 100

Poor

Over: LITTLE PLUM CREEK

.5 NW PRESTON, Randolph, IL

Built 1964 Load: 22.7 t ADT: 50

COUNTY HWY 37

Poor

Over: S FORK SANGAMON RIVE

1.5 MI N NEW CITY, Sangamon, IL

Built 1980 Load: 22.7 t ADT: 1,600

CH 5

Poor

Over: LITTLE SANDY CREEK

1 MI S GLASGOW, Scott, IL

Built 1968 Load: 22.7 t ADT: 150

N AFOLKEY ROAD

Poor

Over: BRUSH CREEK

3.0 MI E ORANGEVILLE, Stephenson, IL

Built 1914 Load: 22.7 t ADT: 200

KEEGAN ST(MS 4160)

Poor

Over: GRAPE CREEK

S END OF TILTON, Vermilion, IL

Built 1900 Load: 22.7 t ADT: 100

FAS-884

Poor

Over: SKILLET FORK

4 MI N CARMI, White, IL

Built 1949 Load: 22.7 t ADT: 550

TR-31 (River Road)

Poor

Over: Meridosia Ditch

AT R I CO LINE, Whiteside, IL

Built 1901 Load: 22.7 t

87TH STREET

Poor

Over: SPRING BROOK CR

0.2 M.E.PLAIN-NAP RD, Will, IL

Built 1961 Load: 22.7 t ADT: 6,600

GILBERT AVE

Poor

Over: NW DRAINAGEWAY

0.25 MI W OF KILBURN, Winnebago, IL

Built 1962 Load: 22.7 t ADT: 1,150

TR 177

Poor

Over: BR WALNUT CR

2 MI W EUREKA, Woodford, IL

Built 1925 Load: 22.7 t ADT: 125

TR 152

Poor

Over: WALNUT DITCH

1 MI W OF WALNUT, Bureau, IL

Built 1965 Load: 23.0 t ADT: 50

TR 241

Poor

Over: BRUSH CREEK

1.3 M ESE CLARKSDALE, Christian, IL

Built 1957 Load: 23.0 t ADT: 100

CH 27 LISBON RD

Poor

Over: SARATOGA CREEK

0.71 MI S SHERRIL RD, Grundy, IL

Built 1985 Load: 23.0 t ADT: 1,000

TR 198A

Poor

Over: SLATER CREEK

1.0 MI W BOWEN, Hancock, IL

Built 1963 Load: 23.0 t ADT: 25

TR NO 244

Poor

Over: BRHOF SPRING CREEK

1.0 MI W DISCO, Hancock, IL

Built 1977 Load: 23.0 t ADT: 125

TR 26

Poor

Over: HONEY CR

NE-14-T8NR6W, Henderson, IL

Built 1965 Load: 23.0 t ADT: 25

TR 228

Poor

Over: MUD CR

1 MI N. CH 20, Iroquois, IL

Built 1914 Load: 23.0 t ADT: 25

TR-148

Poor

Over: DRAINAGE DITCH

E 8TH N 4270, LaSalle, IL

Built 1969 Load: 23.0 t ADT: 10

FRANKLIN RD

Poor

Over: FRANKLIN CREEK

SW EDGE FRANKLIN GRO, Lee, IL

Built 1958 Load: 23.0 t ADT: 625

MEYERS RD

Poor

Over: GREEN RIVER

1.8 MI S AMBOY RD, Lee, IL

Built 1964 Load: 23.0 t ADT: 50

DARTMOOR DRIVE

Poor

Over: BOONE CREEK

0.6 MI E CURRAN, McHenry, IL

Built 1998 Load: 23.0 t ADT: 2,550

TR 109

Poor

Over: STREAM

6.7 MI W HENTON, Shelby, IL

Built 1915 Load: 23.0 t ADT: 75

FAS-1810

Poor

Over: CREEK

2 MI NE COWLING, Wabash, IL

Built 1959 Load: 23.0 t ADT: 150

O.R.# 0062

Poor

Over: BR MCKEE CREEK

SILOAM SPRINGS ST PK, Adams, IL

Built 1905 Load: 23.3 t ADT: 25

CHIPPEWA ST

Poor

Over: GOOSEBERRY CREEK

W OF CHICAGO ST, Livingston, IL

Built 1979 Load: 23.3 t ADT: 400

9 MI. LANE

Poor

Over: SUGAR CREEK

4 MI. W. VIRDEN, Macoupin, IL

Built 1932 Load: 23.3 t ADT: 650

TR 3 (TH-D19)

Poor

Over: STREAM

0.6 M W OF WASHBURN, Marshall, IL

Built 1968 Load: 23.3 t ADT: 50

TR 153

Poor

Over: KILLION DITCH

0.25 mi W of FAS 572A, Mason, IL

Built 1972 Load: 23.3 t ADT: 25

Showing 26,101-26,150 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.