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 46

Poor

Over: RILEY CREEK

2.0 SW NAUVOO, Hancock, IL

Built 1971 Load: 27.9 t ADT: 50

FAI-57 NB

Poor

Over: PRAIRIE CR

6.16 MI S OF ILL 116, Iroquois, IL

Built 1967 Load: 27.9 t ADT: 9,050

TR 6A,MERCER CO LI

Poor

Over: TRIB.TO N.HENDERSON

SW-7-T13NR1E, Knox, IL

Built 1965 Load: 27.9 t ADT: 10

US 52

Poor

Over: MISSION CREEK

0.3 MI W OF ILL 71, LaSalle, IL

Built 1930 Load: 27.9 t ADT: 1,850

FAU 7403(CH 30)

Poor

Over: FINLEY CREEK

IN MT ZION, Macon, IL

Built 1977 Load: 27.9 t ADT: 6,300

TR 19 A

Poor

Over: W OKAW RIVER

1.7 MI W LOVINGTON, Moultrie, IL

Built 1977 Load: 27.9 t ADT: 100

TR 59

Poor

Over: GOOSE CREEK

1.0 MI SW DELAND, Piatt, IL

Built 1965 Load: 27.9 t ADT: 75

TR 171

Poor

Over: LAKE FORK

3.2 MI SE BEMENT, Piatt, IL

Built 1964 Load: 27.9 t ADT: 75

ILL 29

Poor

Over: SENACHWINE CREEK

1.25 MI N OF PUTNAM, Putnam, IL

Built 1962 Load: 27.9 t ADT: 3,200

FIVE FORKSE.RD/CH

Poor

Over: SILVER CR

4 MI SSE FREEBURG, St. Clair, IL

Built 1987 Load: 27.9 t ADT: 350

HANCOCK AVENUE

Poor

Over: PECATONICA RIVER

NORTHEAST FREEPORT, Stephenson, IL

Built 1952 Load: 27.9 t ADT: 1,450

TR 238

Poor

Over: STREAM

2.5 MI SW HOOPESTON, Vermilion, IL

Built 1967 Load: 27.9 t ADT: 50

TR.223B

Poor

Over: RED RIVER

1875 EAST 640 NORTH, Woodford, IL

Built 1971 Load: 27.9 t ADT: 75

FAI 172 NB

Poor

Over: BN RR

1.5MI S I172/US24, Adams, IL

Built 1976 Load: 28.2 t ADT: 3,675

LAWRENCEVILLE ROAD

Poor

Over: PISCASAW CREEK

0.5 MI E BELVIDERE L, Boone, IL

Built 1974 Load: 28.2 t ADT: 2,050

HALPIN RD TR-208

Poor

Over: TR1B E. FK.MAZON RIV

.64 MI S. RICE RD., Grundy, IL

Built 1991 Load: 28.2 t ADT: 75

TR 157A

Poor

Over: MOSQUITO CREEK

WARNER STATION, Henry, IL

Built 1961 Load: 28.2 t ADT: 375

US 34

Poor

Over: WALNUT CREEK

1 MI SW OF ALTONA, Knox, IL

Built 1921 Load: 28.2 t ADT: 2,550

TR 249

Poor

Over: HAW CREEK

S.CTR-15-T10NR2E, Knox, IL

Built 1971 Load: 28.2 t ADT: 50

TR 253(DUMMERMUTH

Poor

Over: MOSQUITO CREEK

2 MI S OF BOODY, Macon, IL

Built 1909 Load: 28.2 t ADT: 50

CH-43 Millstream R

Poor

Over: S Br Kishwaukee Rvr

0.4 MI N ILL 176, McHenry, IL

Built 1964 Load: 28.2 t ADT: 1,700

HAEGERS BEND RD

Poor

Over: FOX RIV INLET

0.3 MI NW ALGONQUIN, McHenry, IL

Built 1986 Load: 28.2 t ADT: 650

BIG MOUND ROAD

Poor

Over: STILLMAN CREEK

2 M SE STILLMAN VALE, Ogle, IL

Built 1981 Load: 28.2 t ADT: 300

TR 345

Poor

Over: Six Mile Tributary

1.59 mi E US 54, Pike, IL

Built 1977 Load: 28.2 t ADT: 50

EMERALD MND RD/CH

Poor

Over: LITTLE SILVER CREEK

0.5MI E ILL RTE 4, St. Clair, IL

Built 1960 Load: 28.2 t ADT: 125

TR 295

Poor

Over: CROOKED CREEK

0.94 MI S OF CH 3, Union, IL

Built 1900 Load: 28.2 t ADT: 100

FAP-821 (ILL-15)

Poor

Over: MILLER CREEK

1.0 MI W SIMS RD, Wayne, IL

Built 1957 Load: 28.2 t ADT: 3,050

TR 150

Poor

Over: HARTLINE CREEK

NEAR ELCO, Alexander, IL

Built 1980 Load: 28.5 t ADT: 125

FAI 70 EB

Poor

Over: MID FK SHOAL CREEK

2.3 MI E POCAHONTAS, Bond, IL

Built 1967 Load: 28.5 t ADT: 13,100

FAI 70 WB

Poor

Over: MID FK SHOAL CREEK

2.3 MI E POCAHONTAS, Bond, IL

Built 1967 Load: 28.5 t ADT: 13,100

OIL VALLEY SCHOOL

Poor

Over: JOHNSON CREEK

2 MI SE MT CARROLL, Carroll, IL

Built 1986 Load: 28.5 t ADT: 200

TR 27

Poor

Over: WILDCAT SLOUGH

4 MI NW RANTOUL, Champaign, IL

Built 1982 Load: 28.5 t ADT: 75

DIVISION ST (RIVER

Poor

Over: N BR CHI RIVER

1129 W DIVISION, Cook, IL

Built 1904 Load: 28.5 t ADT: 6,700

BASELINE RD/MS 199

Poor

Over: ROB ROY CREEK

0.01 MI W OFRT47, Kendall, IL

Built 1966 Load: 28.5 t ADT: 1,350

TR-112-A

Poor

Over: BR FOURMILE GROVE CR

E 6TH N 4640, LaSalle, IL

Built 1961 Load: 28.5 t ADT: 25

FAP-332 (ILL-1)

Poor

Over: STREAM

.25 MI N BIRDS RD, Lawrence, IL

Built 1921 Load: 28.5 t ADT: 3,600

CO HWY 28 FAS 2055

Poor

Over: ROOKS CREEK

2.5 MI S OF CORNELL, Livingston, IL

Built 1970 Load: 28.5 t ADT: 200

TR 137B

Poor

Over: TURTLE CREEK

1455 E, 1600 N, Livingston, IL

Built 1924 Load: 28.5 t ADT: 375

TR 87 (TH-D10)

Poor

Over: N BRANCH CROW CREEK

T29N-R1W-3PM SEC 11, Marshall, IL

Built 1965 Load: 28.5 t ADT: 50

CH43 (MILLSTREAM R

Poor

Over: KISHWAUKEE RIVER

0.5 MI. N. ILL. 176, McHenry, IL

Built 1964 Load: 28.5 t ADT: 1,700

TR 5

Poor

Over: DRAINAGE DITCH

3.5 MI W OF ARTHUR, Moultrie, IL

Built 1989 Load: 28.5 t ADT: 50

TR-179

Poor

Over: LAWS CREEK

2.8 MI S INGRAHAM, Clay, IL

Built 1982 Load: 28.8 t ADT: 100

SHABBONA GROVE ROA

Poor

Over: INDIAN CREEK

680N 200E, DeKalb, IL

Built 1976 Load: 28.8 t ADT: 75

FAU5336 (LUCINDA A

Poor

Over: SO BR KISHWAUKEE RIV

0.7 E. Annie Glidden, DeKalb, IL

Built 1954 Load: 28.8 t ADT: 2,650

TR-136A

Poor

Over: INDIAN CREEK

2 MI N BROWNS, Edwards, IL

Built 1977 Load: 28.8 t ADT: 50

FAY'S LANE

Poor

Over: WELCH CREEK TRIB

.4M E OF DUGAN RD, Kane, IL

Built 1975 Load: 28.8 t ADT: 500

TR 123

Poor

Over: LITTLE INDIAN CREEK

N 41ST E 2110, LaSalle, IL

Built 1962 Load: 28.8 t ADT: 175

TR 535

Poor

Over: PRAIRIE CREEK

N 14TH E 1975, LaSalle, IL

Built 1974 Load: 28.8 t ADT: 275

DELAWARE ST/MS1290

Poor

Over: GOOSE CREEK

W OF CHICAGO ST, Livingston, IL

Built 1996 Load: 28.8 t ADT: 200

TR-56

Poor

Over: Lake Fork Creek Trib

1 W 1 MI S ELKHART, Logan, IL

Built 1958 Load: 28.8 t ADT: 100

Showing 26,351-26,400 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.