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

HURD RD

Fair

Over: WINNEBAGO DITCH

1 MI SW DEER GROVE, Whiteside, IL

Built 1980 Load: 33.4 t ADT: 75

HOOVER RD.

Fair

Over: SUGAR CREEK

2 MI N. STERLING, Whiteside, IL

Built 1967 Load: 33.4 t ADT: 675

I 39/US 51

Fair

Over: UNNAMED STREAM

1.75 MI S OF US 24, Woodford, IL

Built 1992 Load: 33.4 t ADT: 18,700

FAP-733 (IL-61&94)

Fair

Over: Big Neck Creek

0.5M N IL-61&94 Jct., Adams, IL

Built 1924 Load: 33.7 t ADT: 700

TR141A

Fair

Over: LAKE CREEK

2MI E OF MILLER CITY, Alexander, IL

Built 1961 Load: 33.7 t ADT: 75

US 20

Fair

Over: COON CREEK

2 MI. E. BELVIDERE, Boone, IL

Built 1996 Load: 33.7 t ADT: 8,550

TR 111

Fair

Over: LOGAN CR

4 M SE MT STERLING, Brown, IL

Built 1978 Load: 33.7 t ADT: 25

IL 89

Fair

Over: NEGRO CREEK

0.8 MI. S OF CHERRY, Bureau, IL

Built 1978 Load: 33.7 t ADT: 1,150

TR 43

Fair

Over: STREAM

2 MI N OF HARDIN, Calhoun, IL

Built 1901 Load: 33.7 t ADT: 200

FAS 677(CH 3)

Fair

Over: LITTLE EMBARRAS R

2.5 MI S OAKLAND, Coles, IL

Built 1954 Load: 33.7 t ADT: 1,200

I-290 IKE-IL 110 C

Fair

Over: ADDISON CREEK

0.5 M E US 45, Cook, IL

Built 1952 Load: 33.7 t ADT: 140,600

TOUHY AVE

Fair

Over: N SHORE CHANNEL

1 M N DEVON, Cook, IL

Built 1930 Load: 33.7 t ADT: 29,200

I-290 EB (SB)

Fair

Over: RR - UP (NORTH)

0.5 M S IL 64, Cook, IL

Built 1950 Load: 33.7 t ADT: 59,750

I-290 WB (NB)

Fair

Over: RR - UP (NORTH)

0.5 M S IL 64, Cook, IL

Built 1958 Load: 33.7 t ADT: 59,750

HALSTED ST

Fair

Over: N BR CHICAGO RIVER

847 N HALSTED ST, Cook, IL

Built 1955 Load: 33.7 t ADT: 12,050

PEARL STREET

Fair

Over: BULL RUN CREEK

3070N 540E, DeKalb, IL

Built 1963 Load: 33.7 t ADT: 1,050

TR 9 MONA

Fair

Over: KELLY CREEK

1520E 3500N, Ford, IL

Built 1975 Load: 33.7 t ADT: 25

FAS 2873

Fair

Over: TRIB BIG MUDDY RV.

BESSIE RD, Franklin, IL

Built 1979 Load: 33.7 t ADT: 200

TR 159A STONEWALL

Fair

Over: E. FORK MAZON RIVER

.38 MI E STORM RD, Grundy, IL

Built 1985 Load: 33.7 t ADT: 50

FAP-855 (ILL-14)

Fair

Over: LAKEY CREEK

1.5 MI E ILL-142, Hamilton, IL

Built 1923 Load: 33.7 t ADT: 3,200

CH-14 (FAS-883)

Fair

Over: N FK SALINE RIVER

1 MI W FEAKEYVILLE, Hamilton, IL

Built 1985 Load: 33.7 t ADT: 1,000

TR 166

Fair

Over: GROVE CREEK

1.5 NE ADRIAN, Hancock, IL

Built 1961 Load: 33.7 t ADT: 50

TR 84

Fair

Over: S FK OF LARRY'S CR

5.0 W FERRIS, Hancock, IL

Built 1962 Load: 33.7 t ADT: 175

TR 70

Fair

Over: TALBOTT HOLLOW

1.0M SE OF JACOB, Jackson, IL

Built 1994 Load: 33.7 t ADT: 50

RANDALL ROAD

Fair

Over: METRA IC&E UP RRS

.5 MI S BIG TIMBER R, Kane, IL

Built 1979 Load: 33.7 t ADT: 45,500

MAIN STREET

Fair

Over: MILL CREEK

0.5 MI W RANDALL RD, Kane, IL

Built 1975 Load: 33.7 t ADT: 7,100

FAS-1107 Dauberman

Fair

Over: Welch Creek

0.5M.NW.OF KANEVILLE, Kane, IL

Built 1989 Load: 33.7 t ADT: 1,300

US 30

Fair

Over: BLACKBERRY CREEK

0.1 M W OF ORCHARD, Kane, IL

Built 1956 Load: 33.7 t ADT: 15,800

TR 101A

Fair

Over: BERTRAND CREEK

2.5 MI SW BONFIELD, Kankakee, IL

Built 1970 Load: 33.7 t ADT: 50

TR 98

Fair

Over: MINNIE CREEK

5.5 MI NW CHEBANSE, Kankakee, IL

Built 1972 Load: 33.7 t ADT: 50

CATON FARM ROAD

Fair

Over: MID. AUX SABLE CR.

CH23 OVR AUX SABLE, Kendall, IL

Built 1965 Load: 33.7 t ADT: 2,150

FAS-300 CatonFrmRd

Fair

Over: E Aux Sable Creek

CH23 OVR AUX SABLE, Kendall, IL

Built 1965 Load: 33.7 t ADT: 5,700

IL 120 NW RMP @ IL

Fair

Over: STREAM

INTERS ILL 120 & 21, Lake, IL

Built 1961 Load: 33.7 t ADT: 1,400

TR 352 E 21ST

Fair

Over: INDIAN CREEK

E 21ST N 4695, LaSalle, IL

Built 1979 Load: 33.7 t ADT: 25

HOYLE RD

Fair

Over: TRIB OF FIVE MILE BR

1.0 MI S OF US 30, Lee, IL

Built 1974 Load: 33.7 t ADT: 10

ILL 17

Fair

Over: DRAINAGE DITCH

6.36 MI W OF ILL 47, Livingston, IL

Built 1971 Load: 33.7 t ADT: 1,800

TR 49

Fair

Over: MOLE CREEK

670 E, 2650 N, Livingston, IL

Built 1982 Load: 33.7 t ADT: 25

LINCOLN PKWY.

Fair

Over: BRAINARDS BRANCH

.6M N IL121 NW LNCLN, Logan, IL

Built 1939 Load: 33.7 t ADT: 4,350

FAS 777-LIV. ND RO

Fair

Over: TRIB TO SILVER CREEK

1.5ME OF IL 4&LIV RD, Madison, IL

Built 1985 Load: 33.7 t ADT: 525

US 45

Fair

Over: MASSAC CREEK

1.5 MI W I-24, Massac, IL

Built 1978 Load: 33.7 t ADT: 12,800

PELL RD

Fair

Over: SEVENMILE CREEK

2.6 MI N BROOKPORT, Massac, IL

Built 2011 Load: 33.7 t ADT: 450

IL 47

Fair

Over: SMALL STREAM

7.8 M S STATE LINE, McHenry, IL

Built 1985 Load: 33.7 t ADT: 4,500

FAS 634

Fair

Over: SANGAMON RIVER TRIB

2 MI SO ATHENS, Menard, IL

Built 1988 Load: 33.7 t ADT: 1,700

WITT WEST

Fair

Over: MIDDLE FK SHOAL CR

5.8 MI W WITT, Montgomery, IL

Built 1962 Load: 33.7 t ADT: 275

TODD SCHOOL ROAD

Fair

Over: E BR COPPERAS CREEK

CENTER 3 TIMBER TWP, Peoria, IL

Built 1996 Load: 33.7 t ADT: 250

TR 203

Fair

Over: STREAM

1.0 MI NW HAMMOND, Piatt, IL

Built 1964 Load: 33.7 t ADT: 50

US 54

Fair

Over: SAND SLOUGH

4.1M SW IL 96, Pike, IL

Built 1929 Load: 33.7 t ADT: 2,500

ILL 37

Fair

Over: STREAM

1 MI N OLMSTED, Pulaski, IL

Built 1916 Load: 33.7 t ADT: 1,000

TR 104

Fair

Over: LIMEKILM SLOUGH

4 MI W GRAND CHAIN, Pulaski, IL

Built 1977 Load: 33.7 t ADT: 25

BARSTOW ROAD

Fair

Over: DRAINAGE DITCH

1.2 MI W ILL 5 & 92, Rock Island, IL

Built 1938 Load: 33.7 t ADT: 525

Showing 10,451-10,500 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.