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 470

Fair

Over: LITTLE CROOKED CREEK

1.5 MI N COOKSVILLE, McLean, IL

Built 1964 Load: 23.3 t ADT: 50

TR 606

Fair

Over: HENLINE DITCH

1.0 MI SW CROPSEY, McLean, IL

Built 1964 Load: 23.3 t ADT: 50

TR 146

Fair

Over: KICKAPOO CREEK

5.0 MI ESE MCLEAN, McLean, IL

Built 1959 Load: 23.3 t ADT: 75

TR 34

Fair

Over: TAR CREEK

1.5 MI NE OAKFORD, Menard, IL

Built 1968 Load: 23.3 t ADT: 25

COLUMBIAN RD

Fair

Over: BNSF RR

3 MI S MT MORRIS, Ogle, IL

Built 1930 Load: 23.3 t ADT: 100

TR 203

Fair

Over: STREAM

2.25 MI NW HAMMOND, Piatt, IL

Built 1960 Load: 23.3 t ADT: 50

CH 4

Fair

Over: BUSHY FORK CREEK

6.5 MI E WINCHESTER, Scott, IL

Built 1965 Load: 23.3 t ADT: 100

CH 18

Fair

Over: ROBINSON CREEK

1 MI S WESTERVELT, Shelby, IL

Built 1937 Load: 23.3 t ADT: 275

TR 62A

Fair

Over: STREAM

N.CTR-17-T23NR5W, Tazewell, IL

Built 1953 Load: 23.3 t ADT: 900

TR 17

Fair

Over: CREEK

2 MI E OF ALTO PASS, Union, IL

Built 1900 Load: 23.3 t ADT: 125

IL 9 (FAP 697)

Fair

Over: W BR FOUNTAIN CREEK

3.5 MI E OF RANKIN, Vermilion, IL

Built 1963 Load: 23.3 t ADT: 1,950

ILL 127

Fair

Over: SUGAR CREEK

7MI S OF NASHVILLE, Washington, IL

Built 1938 Load: 23.3 t ADT: 4,050

TR-252

Fair

Over: LITTLE DRY FORK

3.8 MI N SIMS, Wayne, IL

Built 1965 Load: 23.3 t ADT: 75

MELLOTTS ROAD

Fair

Over: TRIB OF ROCK RIVER

4 MI NE OF LYNDON, Whiteside, IL

Built 1973 Load: 23.3 t ADT: 10

BROOKE AND 9TH ST

Fair

Over: S.E. DRAINAGEWAY

AT BROOKE AND 9TH ST, Winnebago, IL

Built 1967 Load: 23.3 t ADT: 4,800

SKELTON RD

Fair

Over: DEER CK BRANCH

5 SE OF LINCOLN, Logan, IL

Built 1963 Load: 23.5 t ADT: 75

TR 178

Fair

Over: COTTONWOOD BRANCH

3 SW OF OWANECO, Christian, IL

Built 1950 Load: 23.7 t ADT: 20

TR-229

Fair

Over: SUGAR CREEK

6 MI E SAILOR SPRING, Clay, IL

Built 1950 Load: 23.7 t ADT: 150

TR 105 A

Fair

Over: FLAT BRANCH

1.5 MI E HUMBOLDT, Coles, IL

Built 1958 Load: 23.7 t ADT: 25

FAS-698 (CH-19)

Fair

Over: BIG CREEK

1.3 MI W HARDINVILLE, Crawford, IL

Built 1975 Load: 23.7 t ADT: 525

LASHER ROAD

Fair

Over: E BR BIG ROCK CREEK

1160N 1795E, DeKalb, IL

Built 1957 Load: 23.7 t ADT: 50

TR 70

Fair

Over: STREAM

.4 MI N OF HUME, Edgar, IL

Built 1954 Load: 23.7 t ADT: 125

CH 4 ELLIOTT RD

Fair

Over: THE BIG FOUR

1080E,800N, Ford, IL

Built 1955 Load: 23.7 t ADT: 400

TR 9 MONA

Fair

Over: KELLY CREEK

1450E,3500N, Ford, IL

Built 1971 Load: 23.7 t ADT: 25

FAS 1384-CH 27

Fair

Over: COPPERAS CREEK

E1/2-30-T7NR5E, Fulton, IL

Built 1956 Load: 23.7 t ADT: 2,400

TR 28

Fair

Over: PRAIRIE CR

3 MI NW GILMAN, Iroquois, IL

Built 1939 Load: 23.7 t ADT: 50

TR 15

Fair

Over: TRIB LANGAN CREEK

1.8MI E CH8, Iroquois, IL

Built 1929 Load: 23.7 t ADT: 25

TR 22

Fair

Over: SUGAR CREEK

0.01 MI W OF TR 27, Jersey, IL

Built 1962 Load: 23.7 t ADT: 50

TOWNSHIP RD NO 128

Fair

Over: WOLF CREEK

1 MI S OF ELIZABETH, Jo Daviess, IL

Built 1940 Load: 23.7 t ADT: 225

TANNER ROAD

Fair

Over: LAKE RUN CREEK

0.27 M E of Norris, Kane, IL

Built 2014 Load: 23.7 t ADT: 2,200

RIDGE ROAD

Fair

Over: AUX SABLE CREEK

CH11 OVR AUX SABLE, Kendall, IL

Built 1948 Load: 23.7 t ADT: 10,300

CHICAGO RD/MS0025

Fair

Over: BR W AUX SABLE CR

0.88 MI SW OF CH 8, Kendall, IL

Built 1910 Load: 23.7 t ADT: 75

TR 211

Fair

Over: SPRING CREEK

N 35TH E 115, LaSalle, IL

Built 1972 Load: 23.7 t ADT: 150

TR 91

Fair

Over: BAKERS RUN

1205 E, 2300 N, Livingston, IL

Built 1978 Load: 23.7 t ADT: 50

TR 112 (TH-S44)

Fair

Over: S BRANCH CROW CREEK

T29N-R1W-3PM SEC 22, Marshall, IL

Built 1968 Load: 23.7 t ADT: 25

FAS 1405-CH 12

Fair

Over: NORTH HENDERSON CR

W.CTR-14-T13NR1W, Mercer, IL

Built 1956 Load: 23.7 t ADT: 50

FAS 206-CH 4

Fair

Over: EDWARDS RIVER

S.CTR-24-T15NR1W, Mercer, IL

Built 1947 Load: 23.7 t ADT: 950

HOISINGTON ROAD

Fair

Over: MIDDLE CREEK

4 MI NW BYRON, Ogle, IL

Built 1970 Load: 23.7 t ADT: 150

FORK CREEK RD

Fair

Over: BR. ELKHORN CR.

3.0 N. BROOKVILLE, Ogle, IL

Built 1965 Load: 23.7 t ADT: 50

ILL 29

Fair

Over: ILL RIVER TRIB

0.63MI N PEO CO LINE, Peoria, IL

Built 1953 Load: 23.7 t ADT: 5,350

TR 96

Fair

Over: BROWN CREEK

2.5 MI SW EL DARA, Pike, IL

Built 1900 Load: 23.7 t ADT: 25

TR 91A FDR 443

Fair

Over: LAKE GLENDALE SPILLWAY

2.5 M S GLENDALE, Pope, IL

Built 1937 Load: 23.7 t ADT: 125

FAS 642(CH 19)

Fair

Over: ROBINSON CREEK

4.4 MI W FINDLAY, Shelby, IL

Built 1953 Load: 23.7 t ADT: 950

I-55/64/70 EB CD "

Fair

Over: UPRR

pier H-1 to abut H-5, St. Clair, IL

Built 1969 Load: 23.7 t ADT: 19,300

ILL 146

Fair

Over: DRAINAGE DITCH

1.2 MI E ILL 3, Union, IL

Built 1929 Load: 23.7 t ADT: 4,050

TR 62

Fair

Over: PLUM CREEK

3 MI NW OF OKAWVILLE, Washington, IL

Built 1972 Load: 23.7 t ADT: 25

FAS-800

Fair

Over: NEWTON BRANCH

2.5 MI E MT ERIE, Wayne, IL

Built 1942 Load: 23.7 t ADT: 650

FENTON ROAD

Fair

Over: LYNN CREEK

1 MI NORTH OF FENTON, Whiteside, IL

Built 1968 Load: 23.7 t ADT: 550

HARLMEM RD/BAUER P

Fair

Over: ROCK RIVER

0.65MI W IL 251, Winnebago, IL

Built 1993 Load: 23.7 t ADT: 12,000

WILLS AV

Fair

Over: S.E. DRAINAGEWAY

0.03 MI E OF 11TH ST, Winnebago, IL

Built 1968 Load: 23.7 t ADT: 500

Showing 5,051-5,100 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.