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

FAI-70 WB

Fair

Over: LILY CREEK

3 MI W SW TRI-LEVEL, Effingham, IL

Built 1961 Load: 32.4 t ADT: 11,850

FAS 2796 (US-40)

Fair

Over: STREAM

6 MI E ALTAMONT, Effingham, IL

Built 1950 Load: 32.4 t ADT: 4,550

FAP-774 (ILL-33)

Fair

Over: STREAM

.5 MI E BEECHER CITY, Effingham, IL

Built 1939 Load: 32.4 t ADT: 3,250

TR-111

Fair

Over: SALT CREEK

3 MI NW DIETERICH, Effingham, IL

Built 1909 Load: 32.4 t ADT: 250

TR-145A

Fair

Over: Salt Creek

2 MI NE HEARTVILLE, Effingham, IL

Built 1999 Load: 32.4 t ADT: 150

FAU 8384/OUTERBELT

Fair

Over: TRIB TO L'L WABASH R

W EDGE EFFINGHAM, Effingham, IL

Built 2007 Load: 32.4 t ADT: 4,850

FAP-322 (US-51)

Fair

Over: CSXT RR

1 MI S I-70 INT, Fayette, IL

Built 1958 Load: 32.4 t ADT: 7,150

FAI-70

Fair

Over: OWL CREEK

.5 MI E BOND CO LN, Fayette, IL

Built 1966 Load: 32.4 t ADT: 25,800

FAP-322 (US-51)

Fair

Over: TOWN BRANCH

.8 MI S I-70, Fayette, IL

Built 1962 Load: 32.4 t ADT: 5,700

FAS 1751(US-40)

Fair

Over: OWL CREEK

.6 MI E BOND CO LN, Fayette, IL

Built 1942 Load: 32.4 t ADT: 1,400

FAS 2793 (ILL-140)

Fair

Over: RACCOON CK

W HAGARSTOWN, Fayette, IL

Built 1948 Load: 32.4 t ADT: 475

FAP-777 (ILL-185)

Fair

Over: STREAM

4 MI NW VANDALIA, Fayette, IL

Built 1931 Load: 32.4 t ADT: 2,550

TR-51

Fair

Over: MITCHELL CREEK

2 MI SE HERICK, Fayette, IL

Built 1977 Load: 32.4 t ADT: 50

TR-206

Fair

Over: CASSAR CREEK

1 MI SW SHOBONIER, Fayette, IL

Built 1984 Load: 32.4 t ADT: 100

FAS-651

Fair

Over: RAMSEY CREEK

3.5 MI NW RAMSEY SP, Fayette, IL

Built 1987 Load: 32.4 t ADT: 100

TR 55 LYMAN

Fair

Over: STREAM

1780E 1600N, Ford, IL

Built 1980 Load: 32.4 t ADT: 50

TR 63 SULLIVANT

Fair

Over: MACKINAW RIVER

290E,1200N, Ford, IL

Built 1983 Load: 32.4 t ADT: 50

TR 79 DRUMMER

Fair

Over: DRUMMER CREEK

350E 700N, Ford, IL

Built 1975 Load: 32.4 t ADT: 75

TR 60E BRENTON

Fair

Over: NORTH FORK VERMILION

2130N 1600E, Ford, IL

Built 1975 Load: 32.4 t ADT: 25

TR 69 WALL

Fair

Over: WALL TOWN DR DITCH

1380E 1100N, Ford, IL

Built 1977 Load: 32.4 t ADT: 75

TR10A SULLIVANT

Fair

Over: MACKINAW RIVER

1180N 200E, Ford, IL

Built 1976 Load: 32.4 t ADT: 75

TR 71B WALL

Fair

Over: STREAM

1740E 1000N, Ford, IL

Built 1976 Load: 32.4 t ADT: 25

TR 43 BRENTON

Fair

Over: STREAM

1310E 2000N, Ford, IL

Built 1977 Load: 32.4 t ADT: 50

TR 105 DRUMMER

Fair

Over: DRUMMER CREEK

350E,200N, Ford, IL

Built 1977 Load: 32.4 t ADT: 50

TR 58 PELLA

Fair

Over: STREAM

2920N 1500E, Ford, IL

Built 1977 Load: 32.4 t ADT: 25

TR 48 MONA

Fair

Over: KELLY CR

3480N 1300E, Ford, IL

Built 1978 Load: 32.4 t ADT: 50

TR 43 BRENTON

Fair

Over: STREAM

1620E 2000N, Ford, IL

Built 1978 Load: 32.4 t ADT: 25

TR58 MONA

Fair

Over: KELLY CREEK

3270N 1500E, Ford, IL

Built 1979 Load: 32.4 t ADT: 25

TR 61D LYMAN

Fair

Over: STREAM

1760E 1300N, Ford, IL

Built 1979 Load: 32.4 t ADT: 75

TR 73A WALL

Fair

Over: WALL TOWN DR DITCH

1390E 900N, Ford, IL

Built 1980 Load: 32.4 t ADT: 50

TR64 MONA

Fair

Over: STREAM

3690N 1700E, Ford, IL

Built 1979 Load: 32.4 t ADT: 50

TR44A PATTON

Fair

Over: THE BIG FOUR

520N,1300E, Ford, IL

Built 1979 Load: 32.4 t ADT: 50

TR 121 BUTTON

Fair

Over: M.FK.VERMILION RIVER

2350E,00N, Ford, IL

Built 1970 Load: 32.4 t ADT: 75

TR 43 BRENTON

Fair

Over: STREAM

1740E,2000N, Ford, IL

Built 1980 Load: 32.4 t ADT: 25

TR 51A LYMAN

Fair

Over: STREAM

1720E,1800N, Ford, IL

Built 1980 Load: 32.4 t ADT: 25

TR 30 PEACH 0-SULL

Fair

Over: STREAM

1330N,800E, Ford, IL

Built 1980 Load: 32.4 t ADT: 25

TR 2 MONA

Fair

Over: TRIB TO KELLY CREEK

1800E,3500N, Ford, IL

Built 1981 Load: 32.4 t ADT: 50

TR 12D DRUMMER

Fair

Over: STREAM

410N,300E, Ford, IL

Built 1980 Load: 32.4 t ADT: 75

TR 79A WALL

Fair

Over: WALL TOWN DR DITCH

1520E,700N, Ford, IL

Built 1981 Load: 32.4 t ADT: 50

TR 30 PEACH ORCHAR

Fair

Over: STREAM

1440N,800E, Ford, IL

Built 1984 Load: 32.4 t ADT: 25

TR 9 MONA

Fair

Over: STREAM

1320E3500N, Ford, IL

Built 1985 Load: 32.4 t ADT: 50

TR 02 BUTTON-BUTLE

Fair

Over: STREAM

515N 2800E, Ford, IL

Built 1984 Load: 32.4 t ADT: 50

TR 91 PATTON

Fair

Over: STREAM

510N, 1300E, Ford, IL

Built 1990 Load: 32.4 t ADT: 200

TR64 PELLA

Fair

Over: STREAM

2850N,1700E, Ford, IL

Built 1995 Load: 32.4 t ADT: 50

FAS 473/SHAMBROOK

Fair

Over: WALL TOWN DR DITCH

1260E,1600N, Ford, IL

Built 2003 Load: 32.4 t ADT: 75

TR 104

Fair

Over: ANDY CREEK TRIB.

1/2 MI W OF BUCKNER, Franklin, IL

Built 1977 Load: 32.4 t ADT: 150

TR 345 A

Fair

Over: TRIB CAMB LAKE

PLUMFIELD, Franklin, IL

Built 1981 Load: 32.4 t ADT: 275

FAS 868

Fair

Over: EWING CK

2.5M N THOMPSONVILLE, Franklin, IL

Built 1937 Load: 32.4 t ADT: 1,650

TR 38

Fair

Over: CANE CREEK

1025N 300E, Franklin, IL

Built 1991 Load: 32.4 t ADT: 75

SAVAGE RD-TR 68

Fair

Over: TRIB TO ANDY CREEK

0.18 MI N IL 14, Franklin, IL

Built 2000 Load: 32.4 t ADT: 175

Showing 7,951-8,000 of 27,743 bridges

Related

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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.