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

OLD US 51 (UNMARKE

Poor

Over: CLAY LICK BRANCH

0.1 MI N UNION CO, Jackson, IL

Built 1958 Load: 53.8 t ADT: 850

TR 158

Poor

Over: TOMAHAWK CREEK

E 9TH N 3960, LaSalle, IL

Built 1975 Load: 54.4 t ADT: 25

SB ILL 29

Poor

Over: DICKISON RUN CREEK

0.5 MI N MOSSVILLE, Peoria, IL

Built 1937 Load: 54.4 t ADT: 14,400

FAS 629

Poor

Over: SPRING CREEK

1.0 S BRADFORDTON, Sangamon, IL

Built 1974 Load: 55.7 t ADT: 4,100

ILL 17

Poor

Over: REDDICK RUN CR.

0.9 M E OF REDDICK, Kankakee, IL

Built 1959 Load: 56.1 t ADT: 2,300

ILL 23 FAP 68

Poor

Over: COVEL CREEK

3.35 MI S OF ILL 71, LaSalle, IL

Built 1953 Load: 56.1 t ADT: 5,550

ILL 78

Poor

Over: W.BR COPPERAS C

0.5 MI N OF NORRIS, Fulton, IL

Built 1929 Load: 59.3 t ADT: 3,800

TR 325

Poor

Over: COAL CREEK

0.5 MI W PANA, Christian, IL

Built 1959 Load: 61.2 t ADT: 20

FAS 563 (CH 16)

Poor

Over: Ditch

0.06 mi S of IL 54, Sangamon, IL

Built 1940 Load: 65.8 t ADT: 250

FAI 74 NB

Poor

Over: CAMP CREEK

2 MI N JCT ILL 81, Henry, IL

Built 1968 Load: 66.7 t ADT: 7,400

FAP 709 (US 136)

Poor

Over: SANGAMON RIVER

.75 MI E OF FISHER, Champaign, IL

Built 1972 Load: 67.1 t ADT: 2,500

FAI 74 SB

Poor

Over: CAMP CREEK

2 MI N JCT ILL 81, Henry, IL

Built 1968 Load: 67.1 t ADT: 7,400

DEVON AVE

Poor

Over: SALT CREEK

0.3 M E ARL HTS P5, Cook, IL

Built 1932 Load: 69.7 t ADT: 17,000

80TH AV

Poor

Over: UNION DRAINAGE DITCH

0.20 MI S I-80, Will, IL

Built 1900 Load: 72.6 t ADT: 15,700

TR 133/ SANDOVAL R

Poor

Over: LOST CREEK BRANCH

S. SHATTUC, Clinton, IL

Built 1948 Load: 73.2 t ADT: 175

THOMPSON AVENUE

Poor

Over: DEAD DOG CREEK

0.3 Mi S of 1st ST, Lake, IL

Built 1955 Load: 76.8 t ADT: 650

TR 44

Poor

Over: SUGAR CK FLOOD PLAIN

2 MI WNW BURTON VIEW, Logan, IL

Built 1991 Load: 84.2 t ADT: 50

BARRETT RD

Poor

Over: SWAB RUN CREEK

NE COR SEG18 TIONR5E, Peoria, IL

Built 1975 Load: 87.8 t ADT: 150

CH 29

Poor

Over: CAHAOKA CREEK

6.5 N MT OLIVE, Macoupin, IL

Built 1975 Load: 88.8 t ADT: 350

CEDAR RD/ TR 276

Poor

Over: LAKE FORK

1.5 MI S ST JACOB, Madison, IL

Built 1976 Load: 88.8 t ADT: 50

GOODALL RD/ TR 227

Poor

Over: SILVER CR TRIB

2 MI NW MARINE, Madison, IL

Built 1976 Load: 88.8 t ADT: 50

TR 0173

Poor

Over: THREE MILE BR

4.5 MI N LITCHFIELD, Montgomery, IL

Built 1964 Load: 88.8 t ADT: 25

TR 0193

Poor

Over: SHOP CREEK

3.0 NW LITCHFIELD, Montgomery, IL

Built 1975 Load: 88.8 t ADT: 50

TR 0073

Poor

Over: BOEUR CREEK

3.5 M E LITTLETON, Schuyler, IL

Built 1973 Load: 88.8 t ADT: 25

TR 111

Poor

Over: BR LOGAN CREEK

4 MI E MT STERLING, Brown, IL

Built 1900 Load: 89.1 t ADT: 25

TR-159

Poor

Over: LITTLE MUDDY

3 MI NW SAILOR SPRIN, Clay, IL

Built 1977 Load: 89.1 t ADT: 125

TR-355

Poor

Over: RACCOON CREEK

2.5 MI SW FLORA, Clay, IL

Built 1909 Load: 89.1 t ADT: 100

TR-271

Poor

Over: BRANCH LITTLE MUDDY

2 MI NW CLAY CITY, Clay, IL

Built 1976 Load: 89.1 t ADT: 35

FAP 781 (ILL-33)

Poor

Over: STREAM

MP 19.08, Crawford, IL

Built 1909 Load: 89.1 t ADT: 1,000

IL 121 (FAP 773)

Poor

Over: OTTER CREEK

3.0 MI E 7 MI CURVE, Cumberland, IL

Built 1933 Load: 89.1 t ADT: 1,600

BUFFALO RD - TR 18

Poor

Over: WILSON CREEK

NE-28-T3NR2E, Fulton, IL

Built 1978 Load: 89.1 t ADT: 25

TR 64

Poor

Over: STREAM

SW-9-T8NR5W, Henderson, IL

Built 1995 Load: 89.1 t ADT: 25

ILL 151

Poor

Over: SPRING CREEK

2 MI S OF AVA, Jackson, IL

Built 1935 Load: 89.1 t ADT: 850

STAUNTON BUNKR HIL

Poor

Over: BR. SHERRYCREEK

2.5 MI E. BUNKERHILL, Macoupin, IL

Built 1970 Load: 89.1 t ADT: 900

BUNKR HIL STUNTN R

Poor

Over: PADDOCK CREEK

E. EDGE BUNKER HILL, Macoupin, IL

Built 1980 Load: 89.1 t ADT: 1,250

IL 140

Poor

Over: Paddock Creek Branch

2.15mi E of IL 159, Madison, IL

Built 1927 Load: 89.1 t ADT: 5,650

Bay Road

Poor

Over: Unnamed Tributary

0.5 mi S of Edgewood, McHenry, IL

Built 1980 Load: 89.1 t ADT: 1,550

TR129

Poor

Over: SKUNK CREEK

CTR-4-T14NR2W, Mercer, IL

Built 1975 Load: 89.1 t ADT: 50

ILL 8

Poor

Over: TIBER CREEK

2.2 MI E OF ILL 78, Peoria, IL

Built 1971 Load: 89.1 t ADT: 1,650

I-74

Poor

Over: BIG HOLLOW CREEK

0.5 MI E OF ILL 6, Peoria, IL

Built 1965 Load: 89.1 t ADT: 16,250

TR-177

Poor

Over: DRAINAGE DITCH

2 MI S KEENSBURG, Wabash, IL

Built 1978 Load: 89.1 t ADT: 50

US 34

Poor

Over: CEDAR CREEK TRIB

NE 1/4 SEC28 T11NR1W, Warren, IL

Built 1985 Load: 89.1 t ADT: 8,950

US 34,IL 164, IL 1

Poor

Over: CEDAR CR TRIB

1.3MI E OF US 67, Warren, IL

Built 1964 Load: 99.9 t ADT: 9,450

CH 11

Structurally Deficient

Over: SOUTH FORKBEAR CREEK

3.96 MI N CAMP POINT, Adams, IL

Built 1975 ADT: 725

FAS 945

Structurally Deficient

Over: CLEAR CREEK DITCH

2.5 MI E OF MCCLURE, Alexander, IL

Built 1959 ADT: 1,100

TR-164

Structurally Deficient

Over: Little Beaver Creek

2 MI S DUDLEYVILLE, Bond, IL

Built 1965 ADT: 50

TR 85

Structurally Deficient

Over: MASTERS CREEK

3 MI SE OF OHIO, Bureau, IL

Built 1965 ADT: 25

TR 255

Structurally Deficient

Over: EAST BUREAU CREEK

3.5 MI W HOLLOWAYVIL, Bureau, IL

Built 1970 ADT: 25

FAS 755 (CH2)

Structurally Deficient

Over: IRISH HOLLOW CREEK

STATE ST SOF WTR ST, Calhoun, IL

Built 1977 ADT: 225

TR-82 (Daggert Roa

Structurally Deficient

Over: East Johnson Creek

3 MI S MT. CARROLL, Carroll, IL

Built 1916 ADT: 25

Showing 27,001-27,050 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.