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

JACKSON BLVD

Poor

Over: S BR CHICAGO RIV

375 W & 300 S, Cook, IL

Built 1916 Load: 35.0 t ADT: 2,275

TR 203

Poor

Over: COON CREEK

3 MI SW OF CLINTON, De Witt, IL

Built 1900 Load: 35.0 t ADT: 50

MARBLETOWN RD-TR 2

Poor

Over: TURKEY CREEK

NE-6-T3NR3E, Fulton, IL

Built 1976 Load: 35.0 t ADT: 50

TR 7(DUROC RD)

Poor

Over: STREAM

2.5 MI NW ARGENTA, Macon, IL

Built 1982 Load: 35.0 t ADT: 20

TR 85 (TH-C69)

Poor

Over: SENACHWINE CREEK

T12N-R9E-4PM SEC 29, Marshall, IL

Built 1977 Load: 35.0 t ADT: 50

BROWN ST FAU 6387

Poor

Over: BNSD OUTFALL SEWER

0.7 MI ESE 74 & 150, McLean, IL

Built 1925 Load: 35.0 t ADT: 3,150

ILL 154

Poor

Over: PLUM CREEK

3.6 MI W OF SPARTA, Randolph, IL

Built 1972 Load: 35.0 t ADT: 2,900

US 150 & ILL 116

Poor

Over: IL RIVER TRIBUTARY

.1M S JCT US 150&116, Tazewell, IL

Built 1964 Load: 35.0 t ADT: 20,400

TR-348

Poor

Over: WABASH LEVEE DRAIN D

2 MI SW MAUNIE, White, IL

Built 1992 Load: 35.0 t ADT: 25

LISTER ROAD

Poor

Over: BR. OF ROCK CREEK

1 MI. S.W. MORRISON, Whiteside, IL

Built 1991 Load: 35.0 t ADT: 225

ILL 70

Poor

Over: TRIB. OF PECATONICA

.5 MI W CEMETERY RD, Winnebago, IL

Built 1982 Load: 35.0 t ADT: 3,500

127TH ST

Poor

Over: CAL SAG CHANNEL

0.2 M E IL 83, Cook, IL

Built 1968 Load: 35.3 t ADT: 19,100

I 64 EB

Poor

Over: CNIC RR

.5 MI E BELL RIVE IN, Jefferson, IL

Built 1974 Load: 35.3 t ADT: 5,850

FAI-57 SB

Poor

Over: Norfolk & So. RR / Ditch

0.9 MI N ILL 17, Kankakee, IL

Built 1954 Load: 35.3 t ADT: 14,450

GREEN BAY RD.

Poor

Over: U.P.R.R.

0.6M.S.OF IL-176, Lake, IL

Built 1988 Load: 35.3 t ADT: 8,500

ILL 145

Poor

Over: HAYES CREEK

1.9 MI E GLENDALE, Pope, IL

Built 1947 Load: 35.3 t ADT: 1,200

ILL 37

Poor

Over: CACHE RIVER

AT JOHNSON CO LINE, Pulaski, IL

Built 1957 Load: 35.3 t ADT: 1,350

MELL0TS RD

Poor

Over: DEER CREEK

6.5 MI SE MORRISON, Whiteside, IL

Built 1980 Load: 35.3 t ADT: 50

CH 15(FAS 512)

Poor

Over: BRANCH OF SALT FORK

SIDNEY, Champaign, IL

Built 1982 Load: 35.6 t ADT: 1,950

TR 266

Poor

Over: POLECAT CREEK

2 MI SW ASHMORE, Coles, IL

Built 1981 Load: 35.6 t ADT: 75

TR 164

Poor

Over: KICKAPOO CREEK

2.0 MI SW CHARLESTON, Coles, IL

Built 1982 Load: 35.6 t ADT: 100

FAS 2934-FH 141

Poor

Over: BIG CREEK

3.5 M N E'TOWN, Hardin, IL

Built 1968 Load: 35.6 t ADT: 100

TR 331A

Poor

Over: STREAM

0.8 MI. E. CH 41, Iroquois, IL

Built 1976 Load: 35.6 t ADT: 75

FAS-348 (CH-1)

Poor

Over: Fork of Mazon River

1 MI E OF ODELL, Livingston, IL

Built 1983 Load: 35.6 t ADT: 250

TR 109

Poor

Over: SWAN LAKE DITCH

E.CTR-10-T14NR6W, Mercer, IL

Built 1984 Load: 35.6 t ADT: 25

ILL 203 NB

Poor

Over: CAHOKIA CANAL

0.9mi N of 55/70, St. Clair, IL

Built 1960 Load: 35.6 t ADT: 13,500

ILL 203 SB

Poor

Over: CAHOKIA CANAL

0.9mi N of 55/70, St. Clair, IL

Built 1960 Load: 35.6 t ADT: 13,500

SAWYER RD

Poor

Over: DRAINAGE DITCH

3 MI S. OF MORRISON, Whiteside, IL

Built 1988 Load: 35.6 t ADT: 20

FAS 941

Poor

Over: MILL CREEK

1.6 MI E OF ILL 127, Alexander, IL

Built 1980 Load: 36.0 t ADT: 800

FAS 529 (CH 17)

Poor

Over: TWO MILE SLOUGH

1 MI E OF SADORUS, Champaign, IL

Built 1988 Load: 36.0 t ADT: 800

CH 19

Poor

Over: KASKASKIA DITCH

2.4 MI N SADORUS, Champaign, IL

Built 1947 Load: 36.0 t ADT: 625

TR 117

Poor

Over: S BRANCH BROUILLETTS

1 MI N OF HORACE, Edgar, IL

Built 1895 Load: 36.0 t ADT: 75

TR-272

Poor

Over: OVER CUP CREEK

2.5 MI SE VANDALIA, Fayette, IL

Built 1930 Load: 36.0 t ADT: 300

TR-48

Poor

Over: APPLE CREEK

0.2 MI N HAYPRESS, Greene, IL

Built 1984 Load: 36.0 t ADT: 50

TR 4

Poor

Over: STREAM

0.3 MI N THAWVILLE, Iroquois, IL

Built 1980 Load: 36.0 t ADT: 50

WALKER RD

Poor

Over: MIDDLE AUX SABLE

3.8 MI E OF ILL 47, Kendall, IL

Built 1965 Load: 36.0 t ADT: 550

IL 120 EB

Poor

Over: DES PLAINES RIVER

2.6 M W OF US 41, Lake, IL

Built 1959 Load: 36.0 t ADT: 30,700

ILL 23

Poor

Over: VERMILION R & AT&SF

0.84 MI S OF CO LINE, Livingston, IL

Built 1981 Load: 36.0 t ADT: 3,350

TR 34(LINCOLN MEMO

Poor

Over: WILLOW BRANCH

2.2 MI NW HARRISTOWN, Macon, IL

Built 1976 Load: 36.0 t ADT: 25

ROTHLISBERGER RD

Poor

Over: W BR LAMARSH CR

N1/2-16-T7NR7E, Peoria, IL

Built 1983 Load: 36.0 t ADT: 25

AIRPORT ROAD

Poor

Over: BR OF LAMARSH CR

NEAR SE CNR 34 T8R7, Peoria, IL

Built 1979 Load: 36.0 t ADT: 1,350

I 57 SB & US 51 SB

Poor

Over: LITTLE CREEK

1.5 MI S UNION CO, Pulaski, IL

Built 1964 Load: 36.0 t ADT: 6,900

IL 123

Poor

Over: FANCY CREEK

2.5M E IL 29, Sangamon, IL

Built 1919 Load: 36.0 t ADT: 2,450

FAS 582

Poor

Over: LAMOINE RIVER

1.5MI NE COOPERSTOWN, Brown, IL

Built 1991 Load: 36.3 t ADT: 175

I-180 SB

Poor

Over: BUREAU CREEK

1.2 M S JCT ILL 26, Bureau, IL

Built 1968 Load: 36.3 t ADT: 2,075

LAKE COOK ROAD

Poor

Over: SLOUGH E. OF RAND RD

.5 M. E. OF RAND RD., Cook, IL

Built 1981 Load: 36.3 t ADT: 39,900

N CLARK ST

Poor

Over: MAIN BR CHICAGO RIV

307 N CLARK, Cook, IL

Built 1929 Load: 36.3 t ADT: 6,800

Annie Glidden Rd.

Poor

Over: Watson Creek

0.5mi. N. of 38, DeKalb, IL

Built 1971 Load: 36.3 t ADT: 13,600

CH 20

Poor

Over: WILLIAMS CREEK

1.5 MI S OF AUGUSTA, Hancock, IL

Built 1972 Load: 36.3 t ADT: 325

REYNOLDS RD.-FAS 1

Poor

Over: STREAM

.4 MI. W. OF IL 251, Lee, IL

Built 1991 Load: 36.3 t ADT: 600

Showing 26,751-26,800 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.