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

PRYOR DRIVE

Good

Over: TRIBUTARY SILVER CREEK

50' NORTH OF AIR GUARD WA, St. Clair, IL

Built 2010 Load: 32.7 t ADT: 2,500

EAST ELM ROAD

Good

Over: COON CREEK

1.2 MI E OF ILL 26, Stephenson, IL

Built 1976 Load: 32.7 t ADT: 50

FAS-1819

Good

Over: CREEK

2 MI E GARDS POINT, Wabash, IL

Built 1974 Load: 32.7 t ADT: 625

GEORGE WASHINGTON

Good

Over: CREEK

20953 W HOFF RD, ELWOOD, Will, IL

Built 2010 Load: 32.7 t ADT: 5

FAS 1887

Good

Over: GRASSY CREEK

1 MI NW OF STONEFORT, Williamson, IL

Built 1990 Load: 32.7 t ADT: 300

TOWNSHIP ROAD 37A

Good

Over: BR OF BUREAU CREEK

1.5 M NW OF LAMOILLE, Bureau, IL

Built 1980 Load: 33.0 t ADT: 50

FAS 783

Good

Over: CREEK

2.3M W DAMIANSVILLE, Clinton, IL

Built 1965 Load: 33.0 t ADT: 200

IL 43 NB (HARLEM)

Good

Over: RR MWRDGC

0.2 M N OF I-55, Cook, IL

Built 2022 Load: 33.0 t ADT: 35,500

US 12,45 MANNHEIM

Good

Over: SILVER CREEK

.33 M S OF GRAND AVE, Cook, IL

Built 1977 Load: 33.0 t ADT: 41,700

BRIDGE ST

Good

Over: CHI MET SAN CANAL

0.5 M W GREEN BAYP6, Cook, IL

Built 1908 Load: 33.0 t ADT: 4,550

CH-14

Good

Over: CREEK

0.5 MI N FLAT ROCK, Crawford, IL

Built 1977 Load: 33.0 t ADT: 300

South First Street

Good

Over: S BR Kishwaukee Riv

1800N 890E, DeKalb, IL

Built 2021 Load: 33.0 t ADT: 450

TR 86 SARATOGA RD

Good

Over: EAST FK NETTLE CREEK

.27 MI N NELSON RD, Grundy, IL

Built 1986 Load: 33.0 t ADT: 275

TR 131 BURKHART RO

Good

Over: WAUPECON CREEK

.41 MI W KINSMAN RD, Grundy, IL

Built 1984 Load: 33.0 t ADT: 75

TR NO 360

Good

Over: FLOUR CREEK

1.75 MI N OF AUGUSTA, Hancock, IL

Built 1977 Load: 33.0 t ADT: 150

FAS 919 (Makanda R

Good

Over: Drury Creek Overflow

W of Makanda, Jackson, IL

Built 2016 Load: 33.0 t ADT: 500

PERRY ROAD

Good

Over: BIG ROCK CREEK

2.5 MI NW KANEVILLE, Kane, IL

Built 1972 Load: 33.0 t ADT: 1,650

IL 47

Good

Over: Trib of Aux Sable Cr

.74 M N of US 52, Kendall, IL

Built 2018 Load: 33.0 t ADT: 7,800

ORCHARD ROAD

Good

Over: B+N R.R

ORCHARD RD 1/4MNMILL, Kendall, IL

Built 1993 Load: 33.0 t ADT: 14,700

Hutchins Rd

Good

Over: Mill Creek

0.7 Mi N of IL 132, Lake, IL

Built 2020 Load: 33.0 t ADT: 3,550

FAS-1806 (ILL-250)

Good

Over: MUDDY CREEK

ECL SUMNER, Lawrence, IL

Built 1976 Load: 33.0 t ADT: 2,050

SLEEPY HOLLOW RD

Good

Over: TRIB OF GREEN RIVER

0.5 M W ROCKYFORD RD, Lee, IL

Built 1981 Load: 33.0 t ADT: 175

TR 145A

Good

Over: TURTLE CREEK

1460E,1500N, Livingston, IL

Built 1989 Load: 33.0 t ADT: 325

IL 121

Good

Over: BRANCH SALT CREEK

3.5 MI N MT PULASKI, Logan, IL

Built 1998 Load: 33.0 t ADT: 3,500

TR 234

Good

Over: Main Ditch

0.30 mi N TR 47, Mason, IL

Built 2018 Load: 33.0 t ADT: 50

CHARLES MILLER Rd

Good

Over: FOX RIVER

0.1 MI W RIVER RD, McHenry, IL

Built 2013 Load: 33.0 t ADT: 8,150

FAS 494

Good

Over: SALT CREEK

1 MI SE LEROY, McLean, IL

Built 2000 Load: 33.0 t ADT: 775

FAU-6385 (CH-70)

Good

Over: Sugar Creek

1.0M NE I55 & US150, McLean, IL

Built 2006 Load: 33.0 t ADT: 4,200

FAS 1575

Good

Over: CLARY CREEK

1 M NW TALLULA, Menard, IL

Built 1988 Load: 33.0 t ADT: 100

IL 96

Good

Over: TWO MILE CREEK

1.6M SE US 54-ATLAS, Pike, IL

Built 1938 Load: 33.0 t ADT: 1,200

FAP 558 (IL 100)

Good

Over: Little Blue Creek

1.67 mi S IL 106, Pike, IL

Built 2015 Load: 33.0 t ADT: 1,300

TR 10

Good

Over: TRIB TO CACHE RIVER

0.6 MI N OF MOUNDS, Pulaski, IL

Built 1980 Load: 33.0 t ADT: 175

TR 415B AUBURN

Good

Over: SUGAR CREEK

1.0 E OF AUBURN, Sangamon, IL

Built 1980 Load: 33.0 t ADT: 175

FAS 1621

Good

Over: LICK CREEK

2.5 N CHATHAM, Sangamon, IL

Built 1973 Load: 33.0 t ADT: 3,700

IL 13

Good

Over: ICRR

2.5 S of Freeburg, St. Clair, IL

Built 1997 Load: 33.0 t ADT: 5,800

IL 3 NB

Good

Over: 2 future TRRA tracks

0.5mi SW I-70, St. Clair, IL

Built 2016 Load: 33.0 t ADT: 2,350

IL 3 SB

Good

Over: 2 future TRRA tracks

0.5 mi SW of I-70, St. Clair, IL

Built 2016 Load: 33.0 t ADT: 2,350

ILL 177

Good

Over: TRIB RAYHILLS SLOUGH

4.5M E OF IL 4, St. Clair, IL

Built 1994 Load: 33.0 t ADT: 2,000

SOUTH LORAN RD

Good

Over: BRANCH PLUM CREEK

5.5 MI SW PEARL CITY, Stephenson, IL

Built 1935 Load: 33.0 t ADT: 225

OR 3 (OFF US 51)

Good

Over: STREAM

1 MI N OF ILL 146, Union, IL

Built 1968 Load: 33.0 t ADT: 1,700

TR-349

Good

Over: Crooked Creek

5 MI N WAYNE CITY, Wayne, IL

Built 2007 Load: 33.0 t ADT: 25

GOODENOW ROAD

Good

Over: BR. OF PLUM CREEK

0.14 MI W OF IL-1, Will, IL

Built 2019 Load: 33.0 t ADT: 4,600

EL RANCHO LN

Good

Over: SPRING CREEK

0.03 M S SPRING CR R, Winnebago, IL

Built 1977 Load: 33.0 t ADT: 500

MONROE STREET

Good

Over: EMERY CREEK

ON MONROE AT SO 26TH, Adams, IL

Built 1972 Load: 33.4 t ADT: 1,450

ILL 100

Good

Over: GODAR HOLLOW CREEK

2 M N HARDIN MP 2.4, Calhoun, IL

Built 1996 Load: 33.4 t ADT: 2,300

ILLINOIS 100

Good

Over: POOR FARM HOLLOW CRK

HARDIN HIGH SCH MP.9, Calhoun, IL

Built 1996 Load: 33.4 t ADT: 3,400

TR 98

Good

Over: SPRING BRANCH

2.5 MI S EDINBURG, Christian, IL

Built 1973 Load: 33.4 t ADT: 225

FAS 2704 (OLD-50)

Good

Over: BRUSH CREEK

.75 MI E XENIA, Clay, IL

Built 2012 Load: 33.4 t ADT: 1,100

ILL 177

Good

Over: QUEENS LAKE BRANCH

1/2MI W NEW MEMPHIS, Clinton, IL

Built 1997 Load: 33.4 t ADT: 2,100

TR 215E CENTER ST

Good

Over: QUEEN'S LAKE BRANCH

NEW MEMPHIS, Clinton, IL

Built 1995 Load: 33.4 t ADT: 450

Showing 21,951-22,000 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.