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 187

Fair

Over: BEAR CR.

3M NW C-VILLE, Macoupin, IL

Built 1900 Load: 14.9 t ADT: 50

CH-6 (FAS-576)

Fair

Over: CLARY CREEK

5.3 MI W PETERSBURG, Menard, IL

Built 1953 Load: 14.9 t ADT: 275

COUNTY HWY 40

Fair

Over: LICK CREEK

3.0 S OF NEW BERLIN, Sangamon, IL

Built 1947 Load: 14.9 t ADT: 250

TR 21

Fair

Over: STREAM

3.7 MI SE MOWEAQUA, Shelby, IL

Built 1909 Load: 14.9 t ADT: 75

TR-189 (MAIZE RD)

Fair

Over: BR OF PECATONICA RIV

0.9 MI E ILL RT 75, Stephenson, IL

Built 1953 Load: 14.9 t ADT: 75

TR-201 E CURRIER R

Fair

Over: BR OF PECATONICA RIV

1.4 M E OF ILL RT 26, Stephenson, IL

Built 1962 Load: 14.9 t ADT: 50

ARS-WILTONCENTER R

Fair

Over: FORKED CREEK TRIB

1.5 MI W WILTON CTR, Will, IL

Built 1937 Load: 14.9 t ADT: 225

S MAIN ST (FAS 174

Fair

Over: TRIB TO BEAVER CREEK

0.5 M SO SMITHBORO, Bond, IL

Built 1927 Load: 15.2 t ADT: 250

TR 261

Fair

Over: PRAIRIE FORK

2 MI W. PALMER, Christian, IL

Built 1954 Load: 15.2 t ADT: 100

CH-9

Fair

Over: BEAR CREEK

3.5 MI E XENIA, Clay, IL

Built 1970 Load: 15.2 t ADT: 175

CH 1(FAS 678)

Fair

Over: INDIAN CREEK

1.3 MI S VERMILION, Edgar, IL

Built 1960 Load: 15.2 t ADT: 275

TR-192

Fair

Over: RICHLAND CREEK

2.3 MI NW W LIBERTY, Jasper, IL

Built 1909 Load: 15.2 t ADT: 50

FAS1067(E WILLOW R

Fair

Over: MUDDY PLUM RIVER

6 MI S STOCKTON, Jo Daviess, IL

Built 1950 Load: 15.2 t ADT: 125

MS-1340 MAYFLOWER

Fair

Over: RAVINE

MAYFLOWER N OF ILL R, Lake, IL

Built 1968 Load: 15.2 t ADT: 475

TR 61

Fair

Over: CREEK

2.5S 5 MI W VIRDEN, Macoupin, IL

Built 1900 Load: 15.2 t ADT: 25

TR-18

Fair

Over: HURRICANE CREEK

0.75 MI W PASSPORT, Richland, IL

Built 1909 Load: 15.2 t ADT: 35

TR 67

Fair

Over: CREEK

.1M N FAS 1911, Union, IL

Built 1984 Load: 15.2 t ADT: 50

TR-82

Fair

Over: STREAM

4 MI S LANCASTER, Wabash, IL

Built 1909 Load: 15.2 t ADT: 75

TR-667A

Fair

Over: BR LITTLE WABASH

6 MI S GOLDEN GATE, Wayne, IL

Built 1940 Load: 15.2 t ADT: 10

TR 290

Fair

Over: BIG GEORGE BRANCH

0.25 W OF ASSUMPTION, Christian, IL

Built 1900 Load: 15.6 t ADT: 225

EMERSON ST FAU 635

Fair

Over: CNTRYCLB BR SUGAR CR

0.75 MI NE 51 & 150, McLean, IL

Built 1946 Load: 15.6 t ADT: 6,550

MURPHY ROAD

Fair

Over: JOHNSON RUN

SE-35-T9NR6E, Peoria, IL

Built 1959 Load: 15.6 t ADT: 25

TR 18

Fair

Over: RI RR

850N, 350E, Putnam, IL

Built 1988 Load: 15.6 t ADT: 10

NORTH MILL RD

Fair

Over: BR OF PECATONICA RIV

2.5 MI SE WINSLOW, Stephenson, IL

Built 1952 Load: 15.6 t ADT: 50

CATERPILLAR RD-TR1

Fair

Over: CRANE CREEK

W.CTR-16-T22NR4W, Tazewell, IL

Built 1957 Load: 15.6 t ADT: 350

TR 211

Fair

Over: DRAINAGE DITCH

E.CTR-18-T23NR5W, Tazewell, IL

Built 1955 Load: 15.6 t ADT: 50

20TH ST

Fair

Over: KEITH CREEK

0.02 MI S CHARLES, Winnebago, IL

Built 1928 Load: 15.6 t ADT: 7,750

ILL 127

Fair

Over: TRIB TO BEAVER CREEK

0.85 N CLINTON CO LI, Bond, IL

Built 1927 Load: 15.9 t ADT: 3,500

MONT. CO TR 75B

Fair

Over: OHLMAN BRANCH

0.3 MI NW OHLMAN, Christian, IL

Built 1940 Load: 15.9 t ADT: 150

FAS-1697 (CH-8)

Fair

Over: HONEY CREEK

2 MI SE HARDINVILLE, Crawford, IL

Built 1928 Load: 15.9 t ADT: 250

ANDERLAND RD

Fair

Over: BR OF KISHWAUKEE RV

1765N 600E, DeKalb, IL

Built 1963 Load: 15.9 t ADT: 100

FAS 902

Fair

Over: SALINE RIVER

0.4 MI S ILL 142, Gallatin, IL

Built 1959 Load: 15.9 t ADT: 450

TR-211

Fair

Over: ICG RR

2 MI NORTH BLUFORD, Jefferson, IL

Built 1963 Load: 15.9 t ADT: 50

CH 15

Fair

Over: Prairie Creek

E 22nd, N 1356, LaSalle, IL

Built 1955 Load: 15.9 t ADT: 700

TR 109

Fair

Over: FELKY SLOUGH

2395 E, 2100 N, Livingston, IL

Built 1948 Load: 15.9 t ADT: 25

CH 3

Fair

Over: MIDDLE BRANCH

3 MI NE ROSSVILLE, Vermilion, IL

Built 1941 Load: 15.9 t ADT: 250

TR 43

Fair

Over: STREAM

2 MI NNE OF WAPELLA, De Witt, IL

Built 1938 Load: 16.2 t ADT: 175

KIRKLAND RD

Fair

Over: PR SO BR KISHWAUKEE

3290N 490E, DeKalb, IL

Built 1938 Load: 16.2 t ADT: 575

FAS 2224

Fair

Over: BNSF RR

SOUTH OF ORION, Henry, IL

Built 1930 Load: 16.2 t ADT: 550

TR 382

Fair

Over: COVEL CR

E 23RD N 2250, LaSalle, IL

Built 1950 Load: 16.2 t ADT: 50

FAS 268 B/CH 15

Fair

Over: OTTER CREEK

E 22ND,N 1460, LaSalle, IL

Built 1955 Load: 16.2 t ADT: 600

INTERSTATE 24

Fair

Over: OHIO RIVER

1.5 MI S US 45, Massac, IL

Built 1973 Load: 16.2 t ADT: 31,200

TR 423 A

Fair

Over: STREAM

4.5 MI SW STEWARDSON, Shelby, IL

Built 1909 Load: 16.2 t ADT: 75

TR 54

Fair

Over: BEAR CREEK

0.75 M SE MORRISONVL, Christian, IL

Built 1962 Load: 16.5 t ADT: 100

TR 68

Fair

Over: LOWIS BRANCH

2.5 SE MORRSINVILLE, Christian, IL

Built 1915 Load: 16.5 t ADT: 20

TR 303

Fair

Over: LAKE FORK

2MI NW PANA, Christian, IL

Built 1900 Load: 16.5 t ADT: 20

FAS-795

Fair

Over: DRY FORK

2 MI E JOHNSONVILLE, Wayne, IL

Built 1953 Load: 16.5 t ADT: 1,350

TR 608

Fair

Over: MINE HAULAGE ROAD

1 MI N OF ILL 13, Williamson, IL

Built 1978 Load: 16.5 t ADT: 250

MONTAGUE RD

Fair

Over: W BR MILL CR

1.27 MI E OF PEC. RD, Winnebago, IL

Built 1960 Load: 16.5 t ADT: 1,200

YALE BRIDGE RD

Fair

Over: RACCOON CREEK

AT CLOVER ROAD, Winnebago, IL

Built 1951 Load: 16.5 t ADT: 800

Showing 4,201-4,250 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.