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

FAP 322-US 51

Good

Over: PILES FORK CREEK

1/4 MI N PLEASNTHILL, Jackson, IL

Built 2002 Load: 71.0 t ADT: 8,900

ILL ROUTE 26

Good

Over: DRAINAGE DITCH

.5 MI S AMBOY RD, Lee, IL

Built 2012 Load: 71.0 t ADT: 1,500

FAS 2703-KIN/LOU R

Good

Over: Canadian National RR

.7 MI E MARION CO LI, Clay, IL

Built 2010 Load: 71.3 t ADT: 450

IL 173

Good

Over: BOAT CHANNEL

1.75 M W OF IL 59, Lake, IL

Built 2011 Load: 71.3 t ADT: 11,200

I-74

Good

Over: NORTH CREEK

2.3 M E OF FAS 1478, McLean, IL

Built 1969 Load: 71.3 t ADT: 21,500

SBI-12 (OLD US 50)

Good

Over: ELM RIVER

.2 MI E JCT US 45S, Clay, IL

Built 2011 Load: 71.6 t ADT: 300

US 30

Good

Over: RR - CN / EJ&E

0.16 M N of Sauk Tr, Cook, IL

Built 2015 Load: 71.6 t ADT: 26,600

ILL 82

Good

Over: I&M CANAL

1.2 MI N GENESEO, Henry, IL

Built 2010 Load: 71.6 t ADT: 6,750

IL 73

Good

Over: STREAM

.4MI S STEPHENSON CO, Carroll, IL

Built 1996 Load: 72.3 t ADT: 2,150

TR 482

Good

Over: Stream

5.5 MI E Rossville, Vermilion, IL

Built 2012 Load: 72.9 t ADT: 75

IL RTE 173

Good

Over: CREEK

.23MI E OF IL 76, Boone, IL

Built 2015 Load: 73.2 t ADT: 4,850

IL 83

Good

Over: WILLOW CREEK TRIB

0.14 M S of Thornd, DuPage, IL

Built 2017 Load: 73.2 t ADT: 34,700

FAP 781

Good

Over: HICKORY CREEK

.5 MI W IL 49, Jasper, IL

Built 1998 Load: 73.2 t ADT: 2,600

IL 72

Good

Over: CREEK

0.7 MI W OF IL 26, Ogle, IL

Built 2007 Load: 73.2 t ADT: 2,250

IL 84

Good

Over: DRAINAGE DITCH

S EDGE CORDOVA, Rock Island, IL

Built 2013 Load: 73.2 t ADT: 3,850

3RD AVE S

Good

Over: UNNAMED CREEK

AT CORDOVA, Rock Island, IL

Built 1987 Load: 73.2 t ADT: 50

FAS 406-CH 10

Good

Over: ELLISON CREEK

NW-34-T9NR3W, Warren, IL

Built 1934 Load: 73.5 t ADT: 125

IL 115

Good

Over: Tr N Fk Vermilion Rv

4.06 MI S OF US 24, Ford, IL

Built 2016 Load: 73.9 t ADT: 950

IL 94

Good

Over: GROVE CREEK

8.3M N US136,CARTHAG, Hancock, IL

Built 1994 Load: 73.9 t ADT: 1,450

IL 2

Good

Over: PLUM CREEK

AT W. EDGE OF DIXON, Lee, IL

Built 1993 Load: 73.9 t ADT: 14,100

FAU 6431 CH 29

Good

Over: LITTLE KICKAPOO CR

1.0 MI NW DOWNS, McLean, IL

Built 1987 Load: 73.9 t ADT: 775

ILL 151/KENT KELLE

Good

Over: KINKAID LAKE

4.6 MI N OF ILL 3, Jackson, IL

Built 2012 Load: 74.2 t ADT: 750

FAU 6322 (OLD 66)

Good

Over: INTERMITTENT STREAM

0.13 MI N OF IL 23, Livingston, IL

Built 2001 Load: 74.2 t ADT: 1,300

FAU 6322,OLD 66 SB

Good

Over: INTERMITTENT STREAM

0.14 MI N OF IL 23, Livingston, IL

Built 2001 Load: 74.2 t ADT: 1,300

PEAK RD

Good

Over: SPRING VALLEY CREEK

0.8 MI S OF IL 34, Saline, IL

Built 2018 Load: 74.2 t ADT: 50

CH-10 (FAS 349)

Good

Over: Hickory Creek

3 MI N WESTON, Livingston, IL

Built 2010 Load: 74.8 t ADT: 1,150

FAS 2360

Good

Over: TRIB BURKEIT HOLLOW

0.86 MI E ILL 26, Woodford, IL

Built 1986 Load: 74.8 t ADT: 1,000

FAS 467-CH 5

Good

Over: DILLON CREEK

SW COR-1-T24NR4W, Tazewell, IL

Built 2005 Load: 75.2 t ADT: 900

US 34 OGDEN AVE

Good

Over: DES PLAINES RIV

0.5 M W IL 43, Cook, IL

Built 1933 Load: 75.5 t ADT: 14,300

FAP 725

Good

Over: COPPER SLOUGH

W OF CHAMPAIGN, Champaign, IL

Built 1965 Load: 75.8 t ADT: 10,900

ILLINOIS 146

Good

Over: LITTLE CACHE CREEK

0.2 MI WEST VIENNA, Johnson, IL

Built 1973 Load: 75.8 t ADT: 5,050

IL 4 & 15

Good

Over: KASKASKIA OVERFLOW

0.6 M E JCT IL 4, St. Clair, IL

Built 2009 Load: 75.8 t ADT: 3,600

TR 119

Good

Over: CREEK

0.5 MI W OLNEY, Richland, IL

Built 2022 Load: 76.1 t ADT: 75

WESTERN AVE

Good

Over: BUTTERFIELD CREEK

0.4 N VOLLMER RD, Cook, IL

Built 1900 Load: 76.5 t ADT: 5,550

SOUTH STREET

Good

Over: OTTER CREEK

0.14 MI SW OF CH34, Kane, IL

Built 2015 Load: 76.5 t ADT: 6,150

FAP 709 (US 136)

Good

Over: WILDCAT SLOUGH

2 MI E OF FISHER, Champaign, IL

Built 2007 Load: 76.8 t ADT: 2,500

ILL 37

Good

Over: LITTLE SALINE CREEK

NEAR PULLEYS MILL, Williamson, IL

Built 2009 Load: 77.8 t ADT: 4,600

I-80 EB

Good

Over: IL RAILNET

1.9 MI E JCT IL 89, Bureau, IL

Built 2010 Load: 78.4 t ADT: 12,200

I-80 WB

Good

Over: IL RAILNET

1.9 MI E JCT IL 89, Bureau, IL

Built 2009 Load: 78.4 t ADT: 12,200

FAP 773 (IL 121)

Good

Over: LONG POINT BRANCH

1.3 MI E MONTROSE RD, Cumberland, IL

Built 2022 Load: 78.7 t ADT: 1,600

IL 23

Good

Over: MOLE CREEK

5.68 MI S OF IL 17, Livingston, IL

Built 2007 Load: 78.7 t ADT: 1,550

I-74

Good

Over: MADDEN CREEK TRIB

MANSFIELD INTERCHNG, Piatt, IL

Built 1971 Load: 78.7 t ADT: 22,800

COUNTY HIGHWAY 25

Good

Over: DRAINAGE DITCH

1 MI N OF JOSLIN, Rock Island, IL

Built 1975 Load: 78.7 t ADT: 450

WATERSIDE DR

Good

Over: PARKING GARAGE

W. HARBOR COURT, Cook, IL

Built 2006 Load: 79.4 t ADT: 1,500

IL 96

Good

Over: Sheridan Creek

0.9mi S of Nauvoo, Hancock, IL

Built 2020 Load: 79.4 t ADT: 1,050

ILL 9

Good

Over: DICKERSON SLOUGH

1.66 MI E OF ILL 47, Ford, IL

Built 2004 Load: 79.7 t ADT: 2,550

I-55

Good

Over: CLEAR CREEK

1.5M N ATLANTA INT, Logan, IL

Built 1976 Load: 79.7 t ADT: 21,600

PALMER AVENUE

Good

Over: SILVER CREEK

.2 MI W 25TH AVE, Cook, IL

Built 1994 Load: 80.4 t ADT: 450

Little Rock Road

Good

Over: Trib. little rock cr

2 mi.South Galena RD, Kendall, IL

Built 2018 Load: 80.4 t ADT: 1,900

I 90

Good

Over: STREAM

0.6 MI E STONE QUARY, Boone, IL

Built 2014 Load: 81.0 t ADT: 49,600

Showing 25,351-25,400 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.