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

14TH ST - TR 76H

Fair

Over: LOST CREEK

NE-35-T24NR5W, Tazewell, IL

Built 1978 Load: 32.4 t ADT: 375

JACOBS RD - TR 50

Fair

Over: MAIN DRAINAGE DITCH

NW COR-30-T22N-R5W, Tazewell, IL

Built 1981 Load: 32.4 t ADT: 25

WEIGAND RD - TR 31

Fair

Over: TR18 TO ALLOWAY CR

N CTR-27-T25NR2W, Tazewell, IL

Built 1982 Load: 32.4 t ADT: 150

FARMDALE RD-FAU 67

Fair

Over: BR OF FARM CREEK

NE-35-T26NR4W, Tazewell, IL

Built 1985 Load: 32.4 t ADT: 3,800

RED SHALE HILL-TR1

Fair

Over: STREAM

SE-24-T24NR5W, Tazewell, IL

Built 1984 Load: 32.4 t ADT: 150

KING RD-TR 338

Fair

Over: ROCK CREEK

CTR-36-T25NR2W, Tazewell, IL

Built 1985 Load: 32.4 t ADT: 100

BROADWAY RD-TR 71A

Fair

Over: MUD CREEK

NE COR-2-T25NR3W, Tazewell, IL

Built 1985 Load: 32.4 t ADT: 1,650

KING RD - TR 338

Fair

Over: HOLLANDS CR

SW-36-T25NR2W, Tazewell, IL

Built 1985 Load: 32.4 t ADT: 100

MINIER RD-TR 310A

Fair

Over: WHITTEN BRANCH

S.CTR-3-T23NR2W, Tazewell, IL

Built 1986 Load: 32.4 t ADT: 100

WARNER RD-TR 201

Fair

Over: HICKORY GROVE DITCH

SE COR-10-T23NR6W, Tazewell, IL

Built 1986 Load: 32.4 t ADT: 50

FAS 470-CH 6

Fair

Over: SARGENT SLOUGH

N.CTR-29-T24NR2W, Tazewell, IL

Built 1986 Load: 32.4 t ADT: 1,100

TR 254

Fair

Over: MUD CREEK

NE-2-T25NR3W, Tazewell, IL

Built 1990 Load: 32.4 t ADT: 25

TR 312

Fair

Over: ALLOWAY CREEK

N.CTR-27-T25NR2W, Tazewell, IL

Built 1990 Load: 32.4 t ADT: 150

FAS 1481 - CH 7

Fair

Over: WHITTEN BRANCH

SE-36-T24NR2W, Tazewell, IL

Built 1994 Load: 32.4 t ADT: 1,150

FAS 464 - CH 1

Fair

Over: DILLON CREEK

NW-26-T24N-R4W, Tazewell, IL

Built 1992 Load: 32.4 t ADT: 2,100

TR 134

Fair

Over: FUNKS BRANCH

W. CTR-14-T22NR4W, Tazewell, IL

Built 1996 Load: 32.4 t ADT: 175

FAS 1481-TOWNLINE

Fair

Over: LITTLE MACKINAW RV

N.CTR-3-T23NR2W, Tazewell, IL

Built 1995 Load: 32.4 t ADT: 1,100

TR 128

Fair

Over: BRANCH OF LICK CREEK

2 MI NW OF GROVELAND, Tazewell, IL

Built 1994 Load: 32.4 t ADT: 1,400

MORRIS HILL RD-TR9

Fair

Over: STREAM

SW COR-8-T22NR4W, Tazewell, IL

Built 2000 Load: 32.4 t ADT: 50

FAS 1481-CH 7

Fair

Over: MACKINAW RIVER

NE-1-T23NR6W, Tazewell, IL

Built 2003 Load: 32.4 t ADT: 1,150

PROEHL RD - TR 173

Fair

Over: DRAINAGE DITCH

NW-11-T23NR6W, Tazewell, IL

Built 2005 Load: 32.4 t ADT: 75

BROADWAY RD-TR 71A

Fair

Over: MUD CREEK

N.CTR-2-T24NR3W, Tazewell, IL

Built 2011 Load: 32.4 t ADT: 1,650

FAS 1464-CH 2

Fair

Over: CRANE CREEK

SE-16-T22NR4W, Tazewell, IL

Built 2005 Load: 32.4 t ADT: 350

MAIN ST-FAU 6734

Fair

Over: STREAM

E-23-T26NR3W, Tazewell, IL

Built 1966 Load: 32.4 t ADT: 5,350

ELM STREET

Fair

Over: FARM CREEK

NE-23-T26NR3W, Tazewell, IL

Built 1969 Load: 32.4 t ADT: 150

WESTGATE ROAD

Fair

Over: TRIB TO FARM CR

S OF SEDGEWICK LANE, Tazewell, IL

Built 1982 Load: 32.4 t ADT: 1,850

KERFOOT STREET

Fair

Over: KERFOOT CREEK

SE-34-T26NR4W, Tazewell, IL

Built 1980 Load: 32.4 t ADT: 775

IDLEWOOD ST

Fair

Over: PRAIRIE CREEK

E CTR-28-T25NR3W, Tazewell, IL

Built 1982 Load: 32.4 t ADT: 2,500

QUEENWOOD RD-MORTO

Fair

Over: DILLON CREEK TRIB

0.17 MI W OF I-155, Tazewell, IL

Built 1991 Load: 32.4 t ADT: 1,400

MS #6400B MAIN EXT

Fair

Over: TRIB ACKERMAN CR

SW 1/4 4T25N R3W, Tazewell, IL

Built 1974 Load: 32.4 t ADT: 2,050

E. MONROE ST

Fair

Over: BULL RUN CREEK

NE1/4 21 T25N R3W, Tazewell, IL

Built 1984 Load: 32.4 t ADT: 325

BROADWAY RD

Fair

Over: PRAIRIE CREEK

SE 1/4-32-T25NR3W, Tazewell, IL

Built 1995 Load: 32.4 t ADT: 3,000

THIRD ST

Fair

Over: RR, CITY PARK

NW-10-T22NR4W, Tazewell, IL

Built 1900 Load: 32.4 t ADT: 60

FAI 57

Fair

Over: LICK CREEK

1.9 MI S JOHNSON CO, Union, IL

Built 1960 Load: 32.4 t ADT: 15,900

ILL 127

Fair

Over: STREAM

1.2 MI N ILL 146, Union, IL

Built 1942 Load: 32.4 t ADT: 1,500

US 51

Fair

Over: TRIB OF CACHE CREEK

5.1 miles S of Jackson Co, Union, IL

Built 1964 Load: 32.4 t ADT: 5,950

ILL 127

Fair

Over: STREAM

2.4 M S.OF ALTO PASS, Union, IL

Built 1940 Load: 32.4 t ADT: 1,350

ILL 127

Fair

Over: TRIB TO DUTCH CREEK

2.8 MI SO.JONESBORO, Union, IL

Built 1985 Load: 32.4 t ADT: 1,200

FAS RT 924

Fair

Over: CACHE RIVER

4 MI NE ANNA, Union, IL

Built 1976 Load: 32.4 t ADT: 2,200

FAS 924

Fair

Over: LICK CREEK

1.5M.E.LICK CREEK, Union, IL

Built 1977 Load: 32.4 t ADT: 375

TR 157

Fair

Over: CREEK

0.7 MI.SE FAS 924, Union, IL

Built 1977 Load: 32.4 t ADT: 25

TR 133

Fair

Over: CANEY CREEK TRIB

3 MI NW JONESBORO, Union, IL

Built 1981 Load: 32.4 t ADT: 50

TR 277

Fair

Over: BIG CREEK

.7 MI E DONGOLA CL, Union, IL

Built 1984 Load: 32.4 t ADT: 75

FAS 924

Fair

Over: LICK CREEKOVERFLOW

1.6 MI E LICK CREEK, Union, IL

Built 1987 Load: 32.4 t ADT: 375

TR 276

Fair

Over: LICK CR TRIB

.3 MI S OF LICK CR, Union, IL

Built 1987 Load: 32.4 t ADT: 225

FAS 1902

Fair

Over: UNNAMED CREEK

1.25 MI S WMSN CO LI, Union, IL

Built 1990 Load: 32.4 t ADT: 350

FAS 925

Fair

Over: CLEAR CREEK

2 MI E REYNOLDSVILLE, Union, IL

Built 1995 Load: 32.4 t ADT: 450

FAS 925-OLD CAPE R

Fair

Over: DUTCH CREEK

0.2 MI W OF IL 127, Union, IL

Built 1997 Load: 32.4 t ADT: 900

TR 112

Fair

Over: TRIB TO MILL CREEK

2 MI N OF MILL CREEK, Union, IL

Built 2003 Load: 32.4 t ADT: 75

TR 267A-PUSH LANE

Fair

Over: MILL CREEK

0.62 M N MILL CREEK, Union, IL

Built 2005 Load: 32.4 t ADT: 10

Showing 9,601-9,650 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.