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

TR 96

Fair

Over: MAUVAISE CRK

2.5 M.N.W. JACKSONVI, Morgan, IL

Built 1900 Load: 24.3 t ADT: 175

TR 157

Fair

Over: WILLOW BRANCH

1.25 MI W JVILLE, Morgan, IL

Built 1976 Load: 24.3 t ADT: 250

FAP 323(US 36)

Fair

Over: DITCH #3

2.6 MI W OF HAMMOND, Moultrie, IL

Built 1997 Load: 24.3 t ADT: 2,050

FAS 660(CH 10)

Fair

Over: JONATHAN CREEK

.3 MI E CADWELL, Moultrie, IL

Built 1936 Load: 24.3 t ADT: 1,000

CH 9

Fair

Over: STRINGTOWN BRANCH

4 MI E DALTON CITY, Moultrie, IL

Built 1966 Load: 24.3 t ADT: 50

TR 51

Fair

Over: TWO MILE BRANCH

2.2 MI W CADWELL, Moultrie, IL

Built 1954 Load: 24.3 t ADT: 175

TR 140

Fair

Over: TWO MILE BRANCH

2.5 MI SW OF CADWELL, Moultrie, IL

Built 1952 Load: 24.3 t ADT: 350

TR 97

Fair

Over: BOLIN BRANCH

.25 MI W DOUGLAS CO, Moultrie, IL

Built 1956 Load: 24.3 t ADT: 100

TR 110 A

Fair

Over: HAMOND MUTUAL DITCH

2.5 MI S OF HAMMOND, Moultrie, IL

Built 1941 Load: 24.3 t ADT: 100

TR 189

Fair

Over: LYNN CREEK

3.2 MI NW GAYS, Moultrie, IL

Built 1965 Load: 24.3 t ADT: 275

MARSH RD.

Fair

Over: BR. KYTE CREEK

3.0 S.E. OREGON, Ogle, IL

Built 1959 Load: 24.3 t ADT: 150

BUFFALO RD.

Fair

Over: BUFFALO CREEK

4.0 S.W. POLO, Ogle, IL

Built 1940 Load: 24.3 t ADT: 25

TOWNLINE RD.

Fair

Over: BR. MUD CREEK

2.5 W. LEAF RIVER, Ogle, IL

Built 1955 Load: 24.3 t ADT: 150

LEAF RIVER RD.

Fair

Over: BR. SILVER CREEK

3.5 S. LEAF RIVER, Ogle, IL

Built 1957 Load: 24.3 t ADT: 250

GRIST MILL RD.

Fair

Over: BR. KYTE CREEK

1.5 S.E. CHANA, Ogle, IL

Built 1951 Load: 24.3 t ADT: 175

OAK GROVE ROAD

Fair

Over: EAST FORK CREEK

3 MI N BYRON, Ogle, IL

Built 1973 Load: 24.3 t ADT: 25

DEVILS BACKBONE RD

Fair

Over: GALE CREEK

1.5 MI W OREGON, Ogle, IL

Built 1972 Load: 24.3 t ADT: 375

BOY SCOUT ROAD

Fair

Over: BR DICKISON RUN

S. LINE-15-MEDINA, Peoria, IL

Built 1967 Load: 24.3 t ADT: 75

PARKS SCHOOL ROAD

Fair

Over: STREAM

E1/2-6-JUBILEE, Peoria, IL

Built 1950 Load: 24.3 t ADT: 200

MOSSVILLE RD-CH D3

Fair

Over: STREAM

NWCOR,SW-28-MEDINA, Peoria, IL

Built 1948 Load: 24.3 t ADT: 1,900

LANCASTER ROAD

Fair

Over: E BR COPPERAS CREEK

SE-34-T8NR6E, Peoria, IL

Built 1975 Load: 24.3 t ADT: 25

CO HWY 11

Fair

Over: LITTLE BEAUCOUP CRK

2.5MI E OF FAS 1821, Perry, IL

Built 1953 Load: 24.3 t ADT: 200

CH 12

Fair

Over: STREAM

3.2 MI SE CERRO GORD, Piatt, IL

Built 1939 Load: 24.3 t ADT: 250

TR 106

Fair

Over: STREAM

1 MI N PIERSON STATN, Piatt, IL

Built 1960 Load: 24.3 t ADT: 25

TR 145

Fair

Over: LAKE FORK

1.0 MI NE OF BEMENT, Piatt, IL

Built 1900 Load: 24.3 t ADT: 50

TR 33

Fair

Over: MADDEN CREEK

2.2 MI NE GALESVILLE, Piatt, IL

Built 1988 Load: 24.3 t ADT: 25

I-72 (WB)

Fair

Over: ILLINOIS RIVER

3.7M W IL 100, Pike, IL

Built 1988 Load: 24.3 t ADT: 4,950

TR 371

Fair

Over: BUCK BRANCH

1.5 MI SE NEBO, Pike, IL

Built 1900 Load: 24.3 t ADT: 75

FAS 598

Fair

Over: KISER CREEK

2.0 MI SW BAYLIS, Pike, IL

Built 1957 Load: 24.3 t ADT: 350

TR 306

Fair

Over: BUCK BRANCH

.25 SW NEBO, Pike, IL

Built 1948 Load: 24.3 t ADT: 25

TR 376

Fair

Over: S PRONG SPRING CREEK

2.0 MI SE NEBO, Pike, IL

Built 1950 Load: 24.3 t ADT: 25

TR 85

Fair

Over: STREAM

135N, 1540E, Putnam, IL

Built 1967 Load: 24.3 t ADT: 25

FAS 862

Fair

Over: LITTLE MARY'S RIVER

862 OVER LITTLE MARY, Randolph, IL

Built 1962 Load: 24.3 t ADT: 1,150

TR 223

Fair

Over: ROBINSON CREEK

TR223 OVER ROBINSON, Randolph, IL

Built 1901 Load: 24.3 t ADT: 75

TR 208 A

Fair

Over: ROCK CREEK

TR 208A OVER ROCK TI, Randolph, IL

Built 1901 Load: 24.3 t ADT: 10

LOCUST ST./ MSS 61

Fair

Over: COX CREEK

STEELVILLE, Randolph, IL

Built 1926 Load: 24.3 t ADT: 550

TR-5B

Fair

Over: CREEK

2 MI NW STRINGTOWN, Richland, IL

Built 1909 Load: 24.3 t ADT: 50

FAS-801

Fair

Over: CALFKILLER CREEK

0.5 MI W STRINGTOWN, Richland, IL

Built 1948 Load: 24.3 t ADT: 225

LINN ST #5000

Fair

Over: CREEK

W OLNEY, Richland, IL

Built 1977 Load: 24.3 t ADT: 475

TR-159

Fair

Over: BR COPPERAS CREEK

2 MI SE ILLINOIS CIT, Rock Island, IL

Built 1901 Load: 24.3 t ADT: 25

TR 1 (MERCER COUNT

Fair

Over: UNNAMED STREAM

6 M S OF OAK GROVE, Rock Island, IL

Built 1926 Load: 24.3 t ADT: 25

US 45

Fair

Over: STREAM

0.5 MI SW CAR. MILLS, Saline, IL

Built 1925 Load: 24.3 t ADT: 2,000

FAS 900

Fair

Over: S FORK SALINE RIVER

3.21 MI S.E. US 45, Saline, IL

Built 1959 Load: 24.3 t ADT: 300

TR 10

Fair

Over: STREAM

0.25 M E WSON CO L, Saline, IL

Built 1925 Load: 24.3 t ADT: 25

CH 7

Fair

Over: BLACKMAN CREEK

1 MI SE MITCHELVILLE, Saline, IL

Built 1930 Load: 24.3 t ADT: 175

CH 2

Fair

Over: STREAM

1 MI N OF MUDDY, Saline, IL

Built 1900 Load: 24.3 t ADT: 125

TR 28 (14.25W)

Fair

Over: RICHLAND CREEK

0.5 MI W P PLAINS, Sangamon, IL

Built 1900 Load: 24.3 t ADT: 50

TR 198 3W

Fair

Over: BRUSH CREEK

3.0 SW DIVERNON, Sangamon, IL

Built 1971 Load: 24.3 t ADT: 100

COUNTY HWYS 10 & 4

Fair

Over: LICK CREEK

3.5 S OF NEW BERLIN, Sangamon, IL

Built 1947 Load: 24.3 t ADT: 1,450

MONROE ST

Fair

Over: JACKSONVILLE BRANCH

CHATHAM RD, Sangamon, IL

Built 1976 Load: 24.3 t ADT: 4,450

Showing 5,501-5,550 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.