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

ILL 15 EB TO ILL 1

Good

Over: BR OF RICHLAND CR

W OF ILL 159, St. Clair, IL

Built 1967 Load: 97.2 t ADT: 6,000

US 20

Good

Over: PECATONICA RIV. TRIB

0.5 MI W TOWER ROAD, Stephenson, IL

Built 1985 Load: 97.2 t ADT: 7,300

SBI 1B (OLD RT 1)

Good

Over: CRAWFISH CREEK

3 MI N MT CARMEL, Wabash, IL

Built 2014 Load: 97.2 t ADT: 150

I 64

Good

Over: TRIB LITTLE WABASH R

4.5 MI W ILL-1, White, IL

Built 1975 Load: 97.2 t ADT: 12,200

I-88

Good

Over: DITCH

0.9 M W OF 098-0055, Whiteside, IL

Built 1975 Load: 97.2 t ADT: 12,500

I-88

Good

Over: DITCH

1 MI N OF ERIE, Whiteside, IL

Built 1975 Load: 97.2 t ADT: 13,100

US 6

Good

Over: NW Half Conveyor B

2.69 M E of IL 351, LaSalle, IL

Built 1985 Load: 99.9 t ADT: 9,050

TR 416

Poor

Over: MCKEE CRK

4.7 MI W KELLERVILLE, Adams, IL

Built 1905 ADT: 10

CH 4

Poor

Over: SPRING BRANCH

4.5M N KEYSPORT, Bond, IL

Built 1973 ADT: 50

WALNUT STREET

Poor

Over: ROCKY RUN CREEK

CENTER OF TISKILWA, Bureau, IL

Built 1965 ADT: 75

Reynolds Drive

Poor

Over: EI RR

WEST SIDE CHARLESTON, Coles, IL

Built 1909 ADT: 500

WASHINGTON BLVD

Poor

Over: DES PLAINES RIVER

1.3 M W IL 43, Cook, IL

Built 1956 ADT: 5,700

TR 74

Poor

Over: LONG POINT CREEK

4.8 MI NW WAPELLA, De Witt, IL

Built 1931 ADT: 50

NEW LEBANON RD

Poor

Over: COON CREEK

3130N 1800E, DeKalb, IL

Built 1964 ADT: 150

LINCOLN AVE

Poor

Over: WINFIELD CRK

0.6 MI W N MAIN ST, DuPage, IL

Built 1971 ADT: 800

TR-112

Poor

Over: RACCOON CREEK

2.5 MI SW VANDALIA, Fayette, IL

Built 1940 ADT: 25

TR-51

Poor

Over: PINT CREEK

2 MI SE HERRICK, Fayette, IL

Built 1992 ADT: 50

TR-167 SCULLY RD

Poor

Over: TRIB E FK MAZON RIV

.47 MI W CH-16, Grundy, IL

Built 1910 ADT: 50

TR 368

Poor

Over: LA HARPE CREEK

2.0 SE LAHARPE, Hancock, IL

Built 1909 ADT: 50

TR 93

Poor

Over: GREEN RIVER TRIB

2.0 MI NW GENESEO, Henry, IL

Built 1935 ADT: 150

TR 297

Poor

Over: BR OF EDWARDS RIVER

6.0 MI SE CAMBRIDGE, Henry, IL

Built 1960 ADT: 50

TR 406

Poor

Over: BR MUD CREEK

3.0 MI SW ANNAWAN, Henry, IL

Built 1961 ADT: 50

TR-426 A

Poor

Over: W Fork Spoon River

1.0 MI E KEWANEE, Henry, IL

Built 1962 ADT: 125

US 34 /FAP 68

Poor

Over: LITTLE INDIAN CREEK

3.6 MI NE/ILL 23 (S), LaSalle, IL

Built 1952 ADT: 4,100

ROCKWELL RD

Poor

Over: VERMILION RIVER

E OF UNION ST, LaSalle, IL

Built 1940 ADT: 250

TR 32(ARCHERY CLUB

Poor

Over: MOSQUITO CREEK

1.9 MI NE BLUE MOUND, Macon, IL

Built 1909 ADT: 25

TR 30(STRAWN RD)

Poor

Over: LAKE FORK CREEK

9.0 MI W MAROA, Macon, IL

Built 1976 ADT: 50

TR 285

Poor

Over: HONEY CRK.

3E 4S CARLINVILLE, Macoupin, IL

Built 1900 ADT: 35

TR 98

Poor

Over: SOLOMON CR

1 MI N HETTICK, Macoupin, IL

Built 1977 ADT: 100

TR-6

Poor

Over: LOST CREEK

1 MI NW SANDOVAL, Marion, IL

Built 1959 ADT: 100

TR-358

Poor

Over: KASKASKIA RIVER

1.5 MI N KINMUNDY, Marion, IL

Built 1909 ADT: 25

TR 128 (TH-S47)

Poor

Over: N BRANCH CROW CREEK

T29N-R1W-3PM SEC 2, Marshall, IL

Built 1962 ADT: 75

PIONEER RD

Poor

Over: NIPPERSINK CREEK

0.7 M S W SOLON RD, McHenry, IL

Built 1982 ADT: 325

GRAF ROAD

Poor

Over: PISCASAW CREEK

0.4 MI E OF MAXON RD, McHenry, IL

Built 1998 ADT: 375

TR 11

Poor

Over: GROVE CREEK

1.1MI N GREENVIEW, Menard, IL

Built 1900 ADT: 75

TR 164

Poor

Over: GROVE CR

3.0 MI SE GREENVIEW, Menard, IL

Built 1939 ADT: 75

CH 23

Poor

Over: SPOON CRK.

5 MI W. WOODSON, Morgan, IL

Built 1963 ADT: 50

TR 348

Poor

Over: HORSE CREEK

2.0 SE OF NEW CITY, Sangamon, IL

Built 1963 ADT: 225

TR 109

Poor

Over: STREAM

5.8 MI SE ASSUMPTION, Shelby, IL

Built 1909 ADT: 50

TR 199

Poor

Over: RICHLAND CREEK

3.3 MI NW STRASBURG, Shelby, IL

Built 1966 ADT: 50

TR 271

Poor

Over: RICHLAND CREEK

1.9 MI W STRASBURG, Shelby, IL

Built 1965 ADT: 50

TR 285

Poor

Over: OPPOSUM CREEK

3 MI NW OF OCONEE, Shelby, IL

Built 1969 ADT: 75

TR 42A

Poor

Over: MIDDLE FORK VERM RIV

0.2 MI S ARMSTRONG, Vermilion, IL

Built 1910 ADT: 35

TR 313

Poor

Over: GRAPE CREEK

1 MI SW TILTON, Vermilion, IL

Built 1900 ADT: 75

TR 175

Poor

Over: SLUG RUN

SE-26-T10NR1W, Warren, IL

Built 1900 ADT: 75

ARS-WILTON CTR.RD.

Poor

Over: FORKED CREEK

0.1M.W.OF WILTON CTR, Will, IL

Built 1990 ADT: 225

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

TR 180

Poor

Over: SHORT CREEK

3 MI NNE OF CARTHAGE, Hancock, IL

Built 1917 Load: 2.3 t ADT: 20

S. APPLE RIVER ROA

Poor

Over: APPLE RIVER

1.5 MI NO. WOODBINE, Jo Daviess, IL

Built 1890 Load: 2.3 t ADT: 50

Showing 25,551-25,600 of 27,743 bridges

Related

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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.