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

ILL 16 & 100

Good

Over: SHAW HOLLOW

2 M W ILL 100, Jersey, IL

Built 1965 Load: 38.2 t ADT: 2,550

IL 56

Good

Over: FOX RIVER TAILRACE

0.1 M W OF IL 25, Kane, IL

Built 1932 Load: 38.2 t ADT: 11,900

SEAVEY ROAD

Good

Over: LAKE RUN CREEK

.8 MI E OF BLISS RD, Kane, IL

Built 1981 Load: 38.2 t ADT: 725

ILL 115

Good

Over: STREAM

2 MI E BUCKINGHAM RD, Kankakee, IL

Built 2003 Load: 38.2 t ADT: 1,450

ILL 251

Good

Over: BAILEY CREEK

4.0 MI S OF ILL 71, LaSalle, IL

Built 1999 Load: 38.2 t ADT: 1,700

TR 48A

Good

Over: DRAINAGE DITCH

E. 3RD RD N. 1450, LaSalle, IL

Built 1992 Load: 38.2 t ADT: 50

TR 142

Good

Over: Indian Creek

2 Mi E Bridgeport, Lawrence, IL

Built 2020 Load: 38.2 t ADT: 150

BROOKLYN RD (CH 6)

Good

Over: GREEN RV DRAIN DITCH

2.0 MI. N. OF US 30, Lee, IL

Built 1960 Load: 38.2 t ADT: 250

OLD IL 121

Good

Over: PRAIRIE CREEK

1.0 MI NW HARTSBURG, Logan, IL

Built 2004 Load: 38.2 t ADT: 700

IL 140

Good

Over: W Trib to Silver Crk

0.2mi E of IL 4, Madison, IL

Built 1992 Load: 38.2 t ADT: 2,750

TR 336A N. FRNTG R

Good

Over: CANTEEN CREEK

1.07MI E OF IL 159, Madison, IL

Built 2007 Load: 38.2 t ADT: 775

TR-45

Good

Over: E FK KASKASKIA RIVER

1 MI W KINMUNDY, Marion, IL

Built 1986 Load: 38.2 t ADT: 250

TR-359

Good

Over: SOUTH CREEK

0.5 MI E CARTTER, Marion, IL

Built 1987 Load: 38.2 t ADT: 100

TR-410A

Good

Over: DUMS CREEK

1.5 MI NW IUKA, Marion, IL

Built 1988 Load: 38.2 t ADT: 125

FAS 369 (CH 1)

Good

Over: N. BRANCH CROW CREEK

0.95 E/IL89 @LAROSE, Marshall, IL

Built 2002 Load: 38.2 t ADT: 275

TR 125

Good

Over: PRARIE CREEK BRANCH

3 MI NE MASON CITY, Mason, IL

Built 1983 Load: 38.2 t ADT: 50

TR 142A

Good

Over: STREAM

2.28 MI W CH 6, Massac, IL

Built 1999 Load: 38.2 t ADT: 225

FAS 435-CH 24

Good

Over: TROUBLESOME CREEK

E.CTR-9-T4NR4W, McDonough, IL

Built 1990 Load: 38.2 t ADT: 275

IL 173

Good

Over: MOKELLER CREEK

0.39 M W OF US 14, McHenry, IL

Built 1999 Load: 38.2 t ADT: 5,500

IL 173

Good

Over: MOKELLER CREEK

0.26 M W OF US 14, McHenry, IL

Built 1999 Load: 38.2 t ADT: 5,500

FAS 1472 CH 31

Good

Over: SIX MILE CREEK

2.0 MI W TOWANDA, McLean, IL

Built 2020 Load: 38.2 t ADT: 800

FAS 349 CH 13

Good

Over: BRANCH ROOKS CR

3.0 MI S WESTON, McLean, IL

Built 2006 Load: 38.2 t ADT: 650

IL 16

Good

Over: SHOAL CREEK TRIB.

NOKOMIS W CITY LIMIT, Montgomery, IL

Built 2002 Load: 38.2 t ADT: 1,750

TR 101

Good

Over: SHOAL CREEK

7 M NW NOKOMIS, Montgomery, IL

Built 2002 Load: 38.2 t ADT: 75

US 67 & ILL 100

Good

Over: WILLOW CREEK

1.2MI N JCT IL 104, Morgan, IL

Built 1997 Load: 38.2 t ADT: 2,200

CH-7/FAS-579

Good

Over: Indian Creek

.25MI S ARENZVILLE, Morgan, IL

Built 1988 Load: 38.2 t ADT: 2,250

TR 271

Good

Over: SANDY CREEK TRIB.

1.5MI N MURRAYVILLE, Morgan, IL

Built 1988 Load: 38.2 t ADT: 100

TR 350

Good

Over: CREEK

3.5 MI W ROHRER, Morgan, IL

Built 1964 Load: 38.2 t ADT: 50

SAWMILL ROAD

Good

Over: BOARD TREE BRANCH

SEC 3 T4S R3W 3RD PM, Perry, IL

Built 2020 Load: 38.2 t ADT: 100

ILL 34-FAP 778

Good

Over: UNNAMED STREAM

0.86M S SALINE CO LN, Pope, IL

Built 2011 Load: 38.2 t ADT: 2,350

TR-313 (Mrphysb.Rd

Good

Over: MILL CREEK

LEANDERVILLE, Randolph, IL

Built 1901 Load: 38.2 t ADT: 50

TOWNSHIP ROAD 167

Good

Over: BR OF COPPERAS CREEK

6 M SE MUSCATINE 1A, Rock Island, IL

Built 1984 Load: 38.2 t ADT: 50

TR 176

Good

Over: SWAFFORD CREEK

3.0 MI SW SHELBYVILL, Shelby, IL

Built 2021 Load: 38.2 t ADT: 100

MC CONNELL RD

Good

Over: PECATONICA RIVER

5.0 MI NE LENA, Stephenson, IL

Built 1936 Load: 38.2 t ADT: 900

FAS 464-CH 1

Good

Over: MACKINAW RIVER

NW COR-14-T23NR4W, Tazewell, IL

Built 1949 Load: 38.2 t ADT: 1,550

TR 183

Good

Over: STREAM

1 MI SE HOPE, Vermilion, IL

Built 2022 Load: 38.2 t ADT: 75

FAS 1408 - CH 17

Good

Over: PICAYUNE CREEK

NW-10-T9NR2W, Warren, IL

Built 1968 Load: 38.2 t ADT: 250

CH-4 (FAS-410)

Good

Over: HENDERSON CREEK

N.CTR-22-T12NR1W, Warren, IL

Built 2023 Load: 38.2 t ADT: 600

TR-254

Good

Over: Cedar Creek

N.CTR-25-T9NR1W, Warren, IL

Built 1968 Load: 38.2 t ADT: 250

TR 209

Good

Over: CEDAR FORK CREEK

S LINE-14-T9NR1W, Warren, IL

Built 1984 Load: 38.2 t ADT: 25

DUBOIS-OAKDALE RD

Good

Over: BEAUCOUP CREEK

3.7MI EAST JCT 127, Washington, IL

Built 1996 Load: 38.2 t ADT: 1,050

IL 177/160

Good

Over: KASKASKIA RIVER

4.1M W OF OKAWVILLE, Washington, IL

Built 1997 Load: 38.2 t ADT: 1,750

300 N

Good

Over: DRAINAGE DITCH

4 MI SE NORRIS CITY, White, IL

Built 2019 Load: 38.2 t ADT: 10

1600 N

Good

Over: GOWDY CREEK

1 MI NW ENFIELD, White, IL

Built 2020 Load: 38.2 t ADT: 25

STAR RD

Good

Over: MEREDOSIA DITCH

2.5 MI NW ERIE, Whiteside, IL

Built 1969 Load: 38.2 t ADT: 10

IL 50

Good

Over: ROCK CREEK (S xing)

1.4 M S PAULING RD, Will, IL

Built 1995 Load: 38.2 t ADT: 5,700

BLAIR ROAD

Good

Over: BR. PECATONICA RIVER

0.5 MI E STEPH CO LN, Winnebago, IL

Built 1992 Load: 38.2 t ADT: 50

IL 96

Good

Over: Cedar Creek

1.6 mi. N IL 104, Adams, IL

Built 2017 Load: 38.6 t ADT: 6,200

ILL 146

Good

Over: DRAINAGE DITCH

0.2 MI W ILL 3, Alexander, IL

Built 2011 Load: 38.6 t ADT: 8,550

TR 150

Good

Over: HARTLINE CREEK TRIB

ELCO, Alexander, IL

Built 1994 Load: 38.6 t ADT: 125

Showing 23,001-23,050 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.