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

GRAFF RD - TR 314

Poor

Over: M. F. SUGAR CREEK

SW-26-T23NR2W, Tazewell, IL

Built 1926 Load: 15.9 t ADT: 50

TR 3

Poor

Over: BR MID HEND CR

NW-2-T12NR1W, Warren, IL

Built 1974 Load: 15.9 t ADT: 50

TR.80

Poor

Over: MUD CREEK

1125 EAST 350 NORTH, Woodford, IL

Built 1977 Load: 15.9 t ADT: 75

FAS1240/CH14/Peru

Poor

Over: ADAMS CREEK

SEATONVILLE, Bureau, IL

Built 1987 Load: 16.2 t ADT: 475

TR 272 A

Poor

Over: OAK BRANCH

5MI SE STONINGTON, Christian, IL

Built 1949 Load: 16.2 t ADT: 50

OR 2500 UTICA SHOR

Poor

Over: CLARK RUN

N 2853,E 790, LaSalle, IL

Built 1976 Load: 16.2 t ADT: 1,400

IL 140

Poor

Over: Trib to Indian Creek

1.9 mi E of IL 255, Madison, IL

Built 1927 Load: 16.2 t ADT: 8,050

LORANCE ROAD

Poor

Over: BRANCH SPOON RIVER

SW-12-T11NR5E, Peoria, IL

Built 1961 Load: 16.2 t ADT: 50

PFEIFFER RD-TR 25

Poor

Over: BR LA MARSH CREEK

NC1NENE114 33 T8NR7E, Peoria, IL

Built 1980 Load: 16.2 t ADT: 950

FAS-1680 (CH-16)

Poor

Over: Stream

3.5M S IL-16, Edgar, IL

Built 1941 Load: 16.5 t ADT: 300

TR 22

Poor

Over: PRAIRIE CR

4MI NW GILMAN, Iroquois, IL

Built 1934 Load: 16.5 t ADT: 25

TR 228

Poor

Over: JEFFERSON CR

1.5 MI S. CH 47, Iroquois, IL

Built 1910 Load: 16.5 t ADT: 25

TR 465A

Poor

Over: SIXMILE CREEK

.75 MI W P. HILL, Pike, IL

Built 1969 Load: 16.5 t ADT: 200

READER AVE

Poor

Over: UNNAMED STREAM

MOUNDS, Pulaski, IL

Built 1900 Load: 16.5 t ADT: 10

74TH ST/ FAU 9253

Poor

Over: SO RR 5 W BELLEVILLE

0.5 N IL 13, St. Clair, IL

Built 1955 Load: 16.5 t ADT: 5,450

CH 4 - FAS 637

Poor

Over: BROWN BRANCH

4 MI. E STONINGTON, Christian, IL

Built 1965 Load: 16.8 t ADT: 600

FAU-1334 (HOWARD S

Poor

Over: N BR CHICAGO RIVER

0.3 M E HARLEM P13, Cook, IL

Built 1953 Load: 16.8 t ADT: 10,100

US 6

Poor

Over: TURNER CREEK

.39 MI W IL 84 (N), Henry, IL

Built 1938 Load: 16.8 t ADT: 4,550

CH 14

Poor

Over: SPRING CR. TRIB.

7 MI. S.W. ATKINSON, Henry, IL

Built 1914 Load: 16.8 t ADT: 200

TR 355

Poor

Over: MUD CREEK

1.5 MI NE ALPHA, Henry, IL

Built 1948 Load: 16.8 t ADT: 50

E MASSBACH ROAD

Poor

Over: SCRUB CREEK

6 M SE DERINDA CENTE, Jo Daviess, IL

Built 1940 Load: 16.8 t ADT: 225

TR 100 (9.5W)

Poor

Over: SPRING CREEK

4.0 E BERLIN, Sangamon, IL

Built 1970 Load: 16.8 t ADT: 100

TR 104 (9W)

Poor

Over: PRAIRIE CREEK

1.0 NW FARMINGDALE, Sangamon, IL

Built 1971 Load: 16.8 t ADT: 100

TR 383 12.5 S

Poor

Over: S FORK LICK CREEK

3.5 S OF LOAMI, Sangamon, IL

Built 1967 Load: 16.8 t ADT: 75

TR 4A

Poor

Over: BAY CREEK

0.75M W BELLEVIEW, Calhoun, IL

Built 1930 Load: 17.2 t ADT: 25

TR 46

Poor

Over: CAMP CREEK

.75 MI N LYNN CENTER, Henry, IL

Built 1965 Load: 17.2 t ADT: 275

VAN DYKE RD

Poor

Over: E BRANCH AUXSABLE CK

2 MI W OF RIDGE RD, Kendall, IL

Built 1984 Load: 17.2 t ADT: 50

TR 122

Poor

Over: PRAIRIE CR

E 7TH N 580, LaSalle, IL

Built 1969 Load: 17.2 t ADT: 25

TR 496

Poor

Over: HORSE CRK.

4.5 E NILWOOD, Macoupin, IL

Built 1916 Load: 17.2 t ADT: 20

COUNTY LINE RD

Poor

Over: PISCASAW CREEK

2.5 MI SE OF CAPRON, McHenry, IL

Built 1959 Load: 17.2 t ADT: 475

MILL ROAD

Poor

Over: MILL CREEK

1.7 MI NW OF BYRON, Ogle, IL

Built 1980 Load: 17.2 t ADT: 600

TR 197 10.25 S

Poor

Over: SPRING CREEK

1.0 W OF RIDDLE HILL, Sangamon, IL

Built 1973 Load: 17.2 t ADT: 400

CH3

Poor

Over: GILHAM CREEK

5.75M NW MULBERRY GR, Bond, IL

Built 1916 Load: 17.5 t ADT: 225

TR 82C

Poor

Over: HICKORY CREEK

3.0 MI N SHEFFIELD, Bureau, IL

Built 1935 Load: 17.5 t ADT: 200

TR 34

Poor

Over: W FORK SPOON RIVER

3 MI S OF NEPONSET, Bureau, IL

Built 1965 Load: 17.5 t ADT: 25

CH 19

Poor

Over: STREAM

0.8 MI N SADORUS, Champaign, IL

Built 1940 Load: 17.5 t ADT: 625

TR 56/LAKE BRANCH

Poor

Over: LAKE BRANCH

2 MI NW BREESE, Clinton, IL

Built 1966 Load: 17.5 t ADT: 25

95TH ST

Poor

Over: Calumet River

3258 E.95TH STREET, Cook, IL

Built 1958 Load: 17.5 t ADT: 9,750

EMERSON ST

Poor

Over: WELLER CR

0.4 M N ILL 58 P5, Cook, IL

Built 1967 Load: 17.5 t ADT: 1,700

MS2080 WELLINGTON

Poor

Over: LAKE COSMAN

0.3 M N BISTERFD P5, Cook, IL

Built 1969 Load: 17.5 t ADT: 1,200

MS-2100 LEICESTER

Poor

Over: LAKE COSMAN

1.2 M N DEVON P5, Cook, IL

Built 1969 Load: 17.5 t ADT: 575

FAS 669(CH 7)

Poor

Over: BRUSHY FORK

2 MI SW OF NEWMAN, Douglas, IL

Built 1933 Load: 17.5 t ADT: 500

TR 188

Poor

Over: S BRANCH BROUILLETTS

0.75 MI S OF EDGAR, Edgar, IL

Built 1910 Load: 17.5 t ADT: 50

TR 61 A

Poor

Over: SALT FORK

1 MI NE SCOTTLAND, Edgar, IL

Built 1931 Load: 17.5 t ADT: 150

TR 58 MONA

Poor

Over: KELLY CREEK

3530N,1500E, Ford, IL

Built 1965 Load: 17.5 t ADT: 25

TR 2

Poor

Over: S BR BARKER CR

SW-7-T5NR1E, Fulton, IL

Built 1960 Load: 17.5 t ADT: 10

TR 442

Poor

Over: MUD CREEK

3.0 MI N KEWANEE, Henry, IL

Built 1920 Load: 17.5 t ADT: 75

TR 359

Poor

Over: TRIB TO PIGEON CR

3 MI SE CISSNA PARK, Iroquois, IL

Built 1925 Load: 17.5 t ADT: 75

TR 341

Poor

Over: GAY CREEK

2 MI W. ILL.RTE. 1, Iroquois, IL

Built 1967 Load: 17.5 t ADT: 25

ILL 3

Poor

Over: DRAINAGE DITCH

0.1M SE OF RADDLE RD, Jackson, IL

Built 1933 Load: 17.5 t ADT: 2,150

Showing 25,751-25,800 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.