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

TR 110

Fair

Over: SPILLMAN CREEK

2.5 SW PONTOOSUC, Hancock, IL

Built 1915 Load: 21.4 t ADT: 50

TOWNSHIP RD NO 180

Fair

Over: SCRUB CREEK

4 MI SW PLEASANT VLY, Jo Daviess, IL

Built 1939 Load: 21.4 t ADT: 25

FLETCHER DRIVE

Fair

Over: TYLER CREEK

0.03 MI E RANDALL RD, Kane, IL

Built 1958 Load: 21.4 t ADT: 500

MS 0025

Fair

Over: TRAIL CR

3 MI NE CHEBANSE, Kankakee, IL

Built 1967 Load: 21.4 t ADT: 500

TR 126

Fair

Over: HERMON CREEK

NW-10-T9NR2E, Knox, IL

Built 1967 Load: 21.4 t ADT: 100

IL 173

Fair

Over: SEQUOIT CREEK

0.5 M W OF IL 59, Lake, IL

Built 1931 Load: 21.4 t ADT: 13,900

TR 220 D

Fair

Over: S FORK VERMILION R

860 N, 2500 E, Livingston, IL

Built 1970 Load: 21.4 t ADT: 175

TR 47

Fair

Over: OTTER CRK.

1.5 S 5.5 W VIRDEN, Macoupin, IL

Built 1900 Load: 21.4 t ADT: 50

TR 406

Fair

Over: KEPPLE CREEK

NW-16-T6NR1W, McDonough, IL

Built 1900 Load: 21.4 t ADT: 75

284

Fair

Over: MAUVAISE TERRE CREEK

2.2 MI SW OF ORLEANS, Morgan, IL

Built 1956 Load: 21.4 t ADT: 75

WILLOUGHBY RD

Fair

Over: UNNAMED CR

2.5 MI NE MONROE CEN, Ogle, IL

Built 1959 Load: 21.4 t ADT: 150

PARKS SCH RD

Fair

Over: JUBILEE CREEK

NE1/4 4 JUBILEE TWP, Peoria, IL

Built 1970 Load: 21.4 t ADT: 300

TR 351

Fair

Over: STREAM

NE LA PLACE, Piatt, IL

Built 1969 Load: 21.4 t ADT: 50

TR 66

Fair

Over: LONG GROVE CREEK

1.2 MI N MOWEAQUA, Shelby, IL

Built 1922 Load: 21.4 t ADT: 200

TR 82

Fair

Over: STREAM

5.7 MI SE ASSUMPTION, Shelby, IL

Built 1916 Load: 21.4 t ADT: 50

WARREN RD.

Fair

Over: INDIAN CREEK

3 MI. WEST WINSLOW, Stephenson, IL

Built 1962 Load: 21.4 t ADT: 375

N. DAKOTA RD

Fair

Over: WINNESHEIK CR BRANCH

2.0 MI S OF DAKOTA, Stephenson, IL

Built 1962 Load: 21.4 t ADT: 125

FAS 0926

Fair

Over: CREEK

1.6 MI E OF ILL 127, Union, IL

Built 1937 Load: 21.4 t ADT: 325

FAS 413 - CH 11

Fair

Over: S HENDERSON CR

SW-21-T10NR3W, Warren, IL

Built 1949 Load: 21.4 t ADT: 450

CH 13

Fair

Over: DAVIDS CR

N.CTR-34-T12NR3W, Warren, IL

Built 1939 Load: 21.4 t ADT: 175

FULFS RD

Fair

Over: BR OF CATTAIL CREEK

4.5 MI NW. MORRISON, Whiteside, IL

Built 1959 Load: 21.4 t ADT: 100

FOREST PRESERVE RD

Fair

Over: SUGAR CREEK

0.8 MI E HAULEY RD, Winnebago, IL

Built 1937 Load: 21.4 t ADT: 450

SEMINARY STREET

Fair

Over: CN RR

S CENTRAL ROCKFORD, Winnebago, IL

Built 1901 Load: 21.4 t ADT: 1,150

TR 136

Fair

Over: WALNUT CR

2.2 MI N E GOODFIELD, Woodford, IL

Built 1966 Load: 21.4 t ADT: 50

FAS 946

Fair

Over: DRAINAGE DITCH

2.6 MI S OLIVE BR., Alexander, IL

Built 1962 Load: 21.7 t ADT: 125

RUSSELLVILLE RD

Fair

Over: PISCASAW BRANCH

5.0 MI SE POPLAR GR, Boone, IL

Built 1960 Load: 21.7 t ADT: 700

TR-44

Fair

Over: FAIRFIELD DITCH

1 MI. S.E. OF THOMAS, Bureau, IL

Built 1960 Load: 21.7 t ADT: 75

W AIRPORT ROAD

Fair

Over: DRAINAGE DITCH

2 MILES S SAVANNA, Carroll, IL

Built 1955 Load: 21.7 t ADT: 400

KING RD

Fair

Over: JOHNSON CREEK

6.5 MI SW MT CARROLL, Carroll, IL

Built 1953 Load: 21.7 t ADT: 100

US 45(FAS 1522)

Fair

Over: UPPER SALT CREEK

.7 MI S OF LUDLOW, Champaign, IL

Built 1953 Load: 21.7 t ADT: 3,400

MS 2500 HAMILTON

Fair

Over: OWL CREEK

NW CORNER FISHER, Champaign, IL

Built 1975 Load: 21.7 t ADT: 250

TR 288

Fair

Over: S. FORK LAKE FORK

2.5 MI NNE PANA, Christian, IL

Built 1950 Load: 21.7 t ADT: 100

CH-12 (FAS-732)

Fair

Over: COTTON CREEK

8.75 MI W PANA, Christian, IL

Built 1939 Load: 21.7 t ADT: 500

FAS-2799 (CH-1)

Fair

Over: ELM CREEK

1.5 MI N FLORA, Clay, IL

Built 1914 Load: 21.7 t ADT: 900

TR 20/OLD TRENTON

Fair

Over: BRANCH SUGAR CREEK

2 MI N TRENTON, Clinton, IL

Built 1919 Load: 21.7 t ADT: 100

TR 187

Fair

Over: STREAM

2 MI SW CHARLESTON, Coles, IL

Built 1909 Load: 21.7 t ADT: 75

FAU-2537 BARTLETT

Fair

Over: POPLAR CREEK

0.4 M N BODE RD P7, Cook, IL

Built 1936 Load: 21.7 t ADT: 11,600

SYLVAN ROAD

Fair

Over: CREEK

WEST OF SHERIDAN, Cook, IL

Built 1985 Load: 21.7 t

FAIRVIEW DRIVE

Fair

Over: KILBUCK CREEK

1900N 080E, DeKalb, IL

Built 1955 Load: 21.7 t ADT: 50

UNIVERSITY RD

Fair

Over: SO BR KISHWAUKEE RV

1455N 500E, DeKalb, IL

Built 1954 Load: 21.7 t ADT: 950

UNIVERSITY RD

Fair

Over: S BR KISHWAUKEE RV

1270N 500E, DeKalb, IL

Built 1954 Load: 21.7 t ADT: 950

TR 363

Fair

Over: STREAM

4.5 M S KANSAS 0.8 E, Edgar, IL

Built 1974 Load: 21.7 t ADT: 50

TR 8 SULLIVANT

Fair

Over: MACKINAW RIVER

1110N,100E, Ford, IL

Built 1972 Load: 21.7 t ADT: 25

CH 16

Fair

Over: LOST GROVE CREEK

NE-19-T7NR3E, Fulton, IL

Built 1956 Load: 21.7 t ADT: 50

TR112

Fair

Over: CREEK

.6M.S.JCT.W/FAS1923, Jackson, IL

Built 1970 Load: 21.7 t ADT: 10

TR-159A

Fair

Over: SOUTHERN RR

2.5 MI N MT VERNON, Jefferson, IL

Built 1909 Load: 21.7 t ADT: 275

TOWNSHIP RD NO 244

Fair

Over: PLUM RIVER

4 MI S STOCKTON, Jo Daviess, IL

Built 1956 Load: 21.7 t ADT: 50

IL 56

Fair

Over: FOX RIVER

0.1 MI E OF IL 31, Kane, IL

Built 1931 Load: 21.7 t ADT: 11,900

FAI 74

Fair

Over: SPOON RIV TRIBUTARY

0.6 MI E. SPOON RIV, Knox, IL

Built 1968 Load: 21.7 t ADT: 15,400

I-39 SB/US 51 SB

Fair

Over: TOMAHAWK CREEK

3.5 MI N OF I-80, LaSalle, IL

Built 1979 Load: 21.7 t ADT: 9,300

Showing 4,751-4,800 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.