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

FAI-57

Good

Over: BR E FORK KASKASKIA

.5 MI N KIMUNDY INT, Marion, IL

Built 1970 Load: 42.4 t ADT: 18,100

PORTLAND ROAD - CH

Good

Over: STREAM

2 MI NW JOPPA, Massac, IL

Built 2019 Load: 42.4 t ADT: 200

KISHWAUKEE VALLEY

Good

Over: N BR KISHWAUKEE RIV

0.3 MI E SULLIVAN RD, McHenry, IL

Built 2010 Load: 42.4 t ADT: 4,150

AYER STREET

Good

Over: MOKELER CREEK

0.36 MI W. US 14, McHenry, IL

Built 2011 Load: 42.4 t ADT: 1,550

TR 570C

Good

Over: SANGAMON RIVER

1.0 MI NW SAYBROOK, McLean, IL

Built 1978 Load: 42.4 t ADT: 150

ILL 123

Good

Over: INDIAN CREEK

2.5MI E PETERSBURG, Menard, IL

Built 1991 Load: 42.4 t ADT: 2,200

Ramp to IL 3 SB

Good

Over: PALMER CRK Overflow

0.8 mi S of I-255, Monroe, IL

Built 1991 Load: 42.4 t ADT: 1,350

DAYSVILLE RD

Good

Over: BNSF RR

2 MI. SE. OREGON, Ogle, IL

Built 1997 Load: 42.4 t ADT: 2,100

PYATT CUTLER RD

Good

Over: LITTLE GALUM CREEK

4 MI W OF ILL 13, Perry, IL

Built 2019 Load: 42.4 t ADT: 600

IL 96

Good

Over: HORTON CREEK

2.4M NW ROCKPORT, Pike, IL

Built 1991 Load: 42.4 t ADT: 1,100

I-72/US 36 (EB)

Good

Over: THE SNY SLOUGH

2M SW I-172, Pike, IL

Built 1998 Load: 42.4 t ADT: 7,250

ILL 100

Good

Over: MOORE CREEK

1.5MI S MILTON, Pike, IL

Built 1935 Load: 42.4 t ADT: 700

FAS 1591

Good

Over: DRY FORK CREEK

2 MI N PLEASANT HILL, Pike, IL

Built 2000 Load: 42.4 t ADT: 675

FAP 116(IL 130)

Good

Over: BIG CREEK

2.25 MI S. JCT US-50, Richland, IL

Built 1999 Load: 42.4 t ADT: 4,500

SBI3(OLD IL2&92 FR

Good

Over: waterway

0.8 MI W of old IL 2, Rock Island, IL

Built 1995 Load: 42.4 t ADT: 450

IL 123

Good

Over: TRIB FANCY CREEK

1.3M W I55,WILLIAMSV, Sangamon, IL

Built 1991 Load: 42.4 t ADT: 2,300

Bond Ave

Good

Over: A&SRR

39TH & BOND ALORTON, St. Clair, IL

Built 1980 Load: 42.4 t ADT: 3,250

1L 15

Good

Over: SILVER CREEK

2.5 MI E FREEBURG, St. Clair, IL

Built 1993 Load: 42.4 t ADT: 2,600

IL 13 EB TO IL 15

Good

Over: TRIB TO RICHLAND CRK

1.6 M SE IL 158& 177, St. Clair, IL

Built 2006 Load: 42.4 t ADT: 450

ILL 73

Good

Over: YELLOW CREEK

3.2 MI SOUTH OF US20, Stephenson, IL

Built 1985 Load: 42.4 t ADT: 2,100

SBI 122 (Prairie R

Good

Over: INDIAN CR

0.5 MI S JCT IL 122, Tazewell, IL

Built 2021 Load: 42.4 t ADT: 275

FAS 1481-CH 7

Good

Over: HICKORY GROVE DITCH

SW-36-T24NR6W, Tazewell, IL

Built 1981 Load: 42.4 t ADT: 1,050

TR 186

Good

Over: WINDFALL CREEK

3 MI SE JAMESBURG, Vermilion, IL

Built 2020 Load: 42.4 t ADT: 75

FAP 328 (US 45)

Good

Over: DEER CREEK

2.5 MI N GEFF, Wayne, IL

Built 2008 Load: 42.4 t ADT: 2,600

I- 57

Good

Over: EAST BR HICKORY CRK

0.15M N of Stuenkel, Will, IL

Built 2015 Load: 42.4 t ADT: 43,100

KANKAKEE ST

Good

Over: TRIB JACKSON CRK

0.6 MI S DELANEY RD, Will, IL

Built 1922 Load: 42.4 t ADT: 700

Vetter Road

Good

Over: Cedar Creek

0.52 MI N CentrPtWay, Will, IL

Built 2021 Load: 42.4 t ADT: 4,050

"D" STREET

Good

Over: PETTIBONE CR, ACCESS RD

0.6 KM E OF SHERIDAN RD, Lake, IL

Built 2009 Load: 42.6 t ADT: 4,725

DENNY RD

Good

Over: GERYLINE CR

3.5 MI SE POPLAR GROVE, Boone, IL

Built 2021 Load: 42.8 t ADT: 300

NEW BEDFORD RD

Good

Over: GREEN RIVER

0.6 MI W JCT IL 40, Bureau, IL

Built 2006 Load: 42.8 t ADT: 50

FAS-248 Galena St.

Good

Over: Rocky Run Creek

CENTER OF TISKILWA, Bureau, IL

Built 1986 Load: 42.8 t ADT: 1,100

CH 12(FAS 516)

Good

Over: UPPER SALT FORK DIT

4.5 MI N ST JOSEPH, Champaign, IL

Built 1971 Load: 42.8 t ADT: 1,050

IL 16

Good

Over: Ditch

0.28 mi N Mont Co Ln, Christian, IL

Built 2023 Load: 42.8 t ADT: 1,550

TR 89 (Finch Lane)

Good

Over: Panther Creek

2.5 Mi. S Hord, Clay, IL

Built 2016 Load: 42.8 t ADT: 100

OAK PARK AVE

Good

Over: UNION DRAINAGE DITCH

.25 MI. N. OF I-80, Cook, IL

Built 2009 Load: 42.8 t ADT: 2,700

BLACKTHORN DRIVE

Good

Over: SOUTH NAVY DITCH

0.5 MI N E LAKE AVE, Cook, IL

Built 2019 Load: 42.8 t ADT: 1,000

OAK ST

Good

Over: UNION PACIFIC RR

OAK OV UNION P.RR, Cook, IL

Built 1940 Load: 42.8 t ADT: 1,050

TR-157

Good

Over: Spring Point Creek

2.5 W Montrose Blktp, Cumberland, IL

Built 2017 Load: 42.8 t ADT: 75

IL 64 FAP 17

Good

Over: STREAM

2.5 MI W SYCAMORE, DeKalb, IL

Built 2004 Load: 42.8 t ADT: 4,500

US 36(FAP 323)

Good

Over: BROUILLETTS CREEK

1.5 MI W OF IL 1, Edgar, IL

Built 2004 Load: 42.8 t ADT: 1,550

TR 118

Good

Over: Crooked Creek Trib

0.5 Mi. N W. Salem, Edwards, IL

Built 2022 Load: 42.8 t ADT: 125

OAK HILL RD

Good

Over: TAYLOR BRANCH

0.25MI W FRISCO RD, Franklin, IL

Built 2018 Load: 42.8 t ADT: 50

ALMOND RD

Good

Over: CANE CREEK

300FT N OF PARK ST, Franklin, IL

Built 2017 Load: 42.8 t ADT: 25

Stockland Road

Good

Over: SUGAR CREEK

9.66 M S OF US 24, Iroquois, IL

Built 1994 Load: 42.8 t ADT: 300

IL 1

Good

Over: Pike Creek

0.15 M N of US 52, Iroquois, IL

Built 2021 Load: 42.8 t ADT: 2,250

SCHLAGER RD

Good

Over: SIX MILE CREEK

1.25 MI E US 51, Jackson, IL

Built 2022 Load: 42.8 t ADT: 25

IL 115

Good

Over: Gar Creek

2 M SW of Kankakee, Kankakee, IL

Built 2017 Load: 42.8 t ADT: 2,400

IL 59

Good

Over: FLINT CREEK TRIB

0.1 M S OF US 14, Lake, IL

Built 1977 Load: 42.8 t ADT: 16,700

PFINGSTEN RD

Good

Over: CANADIAN PACIFIC RR

.2 MI W OF WAUKEGAN, Lake, IL

Built 1987 Load: 42.8 t ADT: 9,300

TR-107A

Good

Over: SOMONAUK CREEK

N 42ND E 2520, LaSalle, IL

Built 2018 Load: 42.8 t ADT: 850

Showing 23,901-23,950 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.