Total Bridges
27,743
Public highway bridges in Illinois
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
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)
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
31
Nebraska
7.73% top marginal rate
17
Illinois
7.88% top marginal rate
25
Massachusetts
7.96% top marginal rate
29
Missouri
8.53% top marginal rate
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
PoorOver: DRAINAGE CANAL
2.2 MI E MEYER, Adams, IL
Built 1980 Load: 0.6 t ADT: 200
CH 15
PoorOver: 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 DeficientOver: WILSON CREEK
NE-35-T3NR2E, Fulton, IL
Built 1935 Load: 1.3 t ADT: 10
TR 10-B
Structurally DeficientOver: KING CREEK
W EDGE OF MINERAL, Bureau, IL
Built 1899 Load: 1.6 t ADT: 10
TR-6
Structurally DeficientOver: DRAINAGE DITCH
3.5 MI NE DIETERICH, Effingham, IL
Built 1909 Load: 1.6 t ADT: 25
TR208K(TWIN BRIDGE
Structurally DeficientOver: BIG CREEK
NE EDGE MT ZION, Macon, IL
Built 1967 Load: 1.9 t ADT: 375
All Bridges in Illinois
FLAGG ROAD
FairOver: CLEAR CREEK
7.5 MI S OF OREGON, Ogle, IL
Built 1989 Load: 30.1 t ADT: 1,650
TR 80
FairOver: S BRANCH SALT CREEK
1.0 MI NE HARRIS, Piatt, IL
Built 1968 Load: 30.1 t ADT: 150
TR 87
FairOver: HADLEY CR TRIBUTARY
4.0 MI NE BARRY, Pike, IL
Built 1961 Load: 30.1 t ADT: 25
ARSENAL RD
FairOver: SYLVAN SLOUGH
VIADUCT RI ARSENAL, Rock Island, IL
Built 1906 Load: 30.1 t ADT: 8,900
TR 373
FairOver: SUGAR CREEK
1.0 MI W OF GLENARM, Sangamon, IL
Built 1961 Load: 30.1 t ADT: 325
TR 54
FairOver: COON RUN CREEK
2 MI NW BLUFFS, Scott, IL
Built 1969 Load: 30.1 t ADT: 75
BEAVER ROAD
FairOver: RICHLAND CREEK
.3 MI. W. RED OAK, Stephenson, IL
Built 1983 Load: 30.1 t ADT: 75
MS 1000
FairOver: STREAM
N EDGE OF RANKIN, Vermilion, IL
Built 1960 Load: 30.1 t ADT: 75
TR 166
FairOver: LITTLE VERMILION RIV
1.3 MI SW INDIANOLA, Vermilion, IL
Built 1975 Load: 30.1 t ADT: 50
FAS-806 (CH-4)
FairOver: TRIB CRAWFISH CREEK
1 MI W ADAMS CORNER, Wabash, IL
Built 1984 Load: 30.1 t ADT: 775
FAP-328 (US-45)
FairOver: DRAINAGE DITCH
2 MI N ENFIELD, White, IL
Built 1978 Load: 30.1 t ADT: 1,750
DESPLAINES RIVER R
FairOver: GRANT CREEK CUTOFF
1.3 MI E COUNTY LN R, Will, IL
Built 1900 Load: 30.1 t ADT: 75
ILL 148
FairOver: BIG MUDDY RIVER
0.1 MI S FRANKLIN CO, Williamson, IL
Built 1931 Load: 30.1 t ADT: 3,650
CH 1
FairOver: LICK CREEK
2.8 MI E LIMA, Adams, IL
Built 1938 Load: 30.5 t ADT: 150
TR 0164
FairOver: GRINDSTONE CREEK
2.3 MI N MENDON, Adams, IL
Built 1898 Load: 30.5 t ADT: 75
ARCH STREET
FairOver: ROCKY RUN CREEK
W CENTER OF TISKILWA, Bureau, IL
Built 1925 Load: 30.5 t ADT: 75
UNION ST
FairOver: STOCKWELL BRANCH
SW MARTINSVILLE, Clark, IL
Built 1909 Load: 30.5 t ADT: 250
FAS-799 (CH-3)
FairOver: HURRICANE CREEK
5 MI E SAILOR SPRING, Clay, IL
Built 1909 Load: 30.5 t ADT: 50
FAS 787
FairOver: BREWSTER CREEK
.5 SO BOULDER, Clinton, IL
Built 1964 Load: 30.5 t ADT: 400
FAS 787
FairOver: COLES CREEK
2.5 MI N FERRIN, Clinton, IL
Built 1964 Load: 30.5 t ADT: 650
TR 41
FairOver: KASKASKIA RIVER
1.0 MI N COOKS MILL, Coles, IL
Built 1969 Load: 30.5 t ADT: 125
TR 182
FairOver: CASSEL CREEK
1 MI N IL 316, Coles, IL
Built 1977 Load: 30.5 t ADT: 300
US 45 SB (LA GRANG
FairOver: CAL SAG CHANNEL
0.2 M N IL 83, Cook, IL
Built 1967 Load: 30.5 t ADT: 33,800
IL 83 (ELMHURST R
FairOver: MCDONALD CREEK
.5 M S PALATINE RD, Cook, IL
Built 1960 Load: 30.5 t ADT: 14,900
IL 19 (IRVING PAR
FairOver: BENSENVILLE DR DTCH
1 M W US 45, Cook, IL
Built 1970 Load: 30.5 t ADT: 36,300
I-294
FairOver: STREAM
I80 & I294 "Y", Cook, IL
Built 1958 Load: 30.5 t ADT: 104,500
16TH STREET
FairOver: THORN CREEK
0.5 M E ASHLAND AVE, Cook, IL
Built 1926 Load: 30.5 t ADT: 1,400
OLD WILLOW ROAD
FairOver: MID FK N BR CHI RIV
0.3 M W US41 P14, Cook, IL
Built 1995 Load: 30.5 t ADT: 600
CH-4
FairOver: Trib of Lamotte CK
W OF PALESTINE, Crawford, IL
Built 1976 Load: 30.5 t ADT: 900
TR 34
FairOver: LONG POINT CREEK
3.5 MI SE NEOGA, Cumberland, IL
Built 1974 Load: 30.5 t ADT: 100
WINFIELD RD
FairOver: SPRING BROOK
0.7 MI N IL 56, DuPage, IL
Built 1929 Load: 30.5 t ADT: 16,900
TR 289
FairOver: BIG CREEK
3.5 MI SE CONLOGUE, Edgar, IL
Built 1965 Load: 30.5 t ADT: 50
ILL 115
FairOver: KELLY CREEK
2.03 MI S OF ILL 116, Ford, IL
Built 1981 Load: 30.5 t ADT: 675
TR 7
FairOver: TURKEY CREEK
6 MI NW ATHENSVILLE, Greene, IL
Built 1990 Load: 30.5 t ADT: 25
TR 22B
FairOver: LOUIS CREEK
1 MI N 1.5 W BUCKLEY, Iroquois, IL
Built 1997 Load: 30.5 t ADT: 25
TR 164
FairOver: SHAVETAIL CR
0.25 MI N. CH 47, Iroquois, IL
Built 1939 Load: 30.5 t ADT: 25
TR 374
FairOver: COON CREEK
3.5 MI E. RTE 1, Iroquois, IL
Built 1974 Load: 30.5 t ADT: 25
ILL 151
FairOver: CREEK
1 MI S OF AVA, Jackson, IL
Built 1935 Load: 30.5 t ADT: 850
FAS 919 CH 12
FairOver: INDIAN CRK
NW 1/4 SEC.25-10-1, Jackson, IL
Built 1981 Load: 30.5 t ADT: 600
FAP-849 (ILL-142)
FairOver: BRANCH OF CASEY FORK
.5 MI S MT VERNON, Jefferson, IL
Built 1930 Load: 30.5 t ADT: 4,900
FAS 2830 CH 13
FairOver: CASEY FORK CREEK
1 MI W BONNIE, Jefferson, IL
Built 1968 Load: 30.5 t ADT: 450
FAS 748
FairOver: PIASA CREEK
2.3 M E OF ILL 67, Jersey, IL
Built 1977 Load: 30.5 t ADT: 1,050
SOUTH BLACKJACK RO
FairOver: SMALLPOX CREEK
3 MILES SOUTH GALENA, Jo Daviess, IL
Built 1959 Load: 30.5 t ADT: 475
US 45
FairOver: STREAM
N OF BLOOMFIELD, Johnson, IL
Built 1953 Load: 30.5 t ADT: 2,150
MEREDITH ROAD
FairOver: UNION DRAI.DITCH #3
1.4 MI S. ILL 64, Kane, IL
Built 1992 Load: 30.5 t ADT: 900
KESLINGER ROAD
FairOver: BLACKBERRY CREEK
1.8M E OF IL47, Kane, IL
Built 2004 Load: 30.5 t ADT: 7,100
TR 87A
FairOver: EXLINE SLOUGH
3.7 MI E BRADLEY, Kankakee, IL
Built 1971 Load: 30.5 t ADT: 1,350
GALENA RD FAU2502
FairOver: LITTLE ROCK CREEK
ITEM 7 OVR ITEM 6, Kendall, IL
Built 2006 Load: 30.5 t ADT: 6,950
ILL 178
FairOver: VERMILION RIVER
3.7 MI S OF ILL 71, LaSalle, IL
Built 1934 Load: 30.5 t ADT: 1,650
SHAW ROAD
FairOver: BR. OF GREEN RIVER
5.0 MI E OF AMBOY, Lee, IL
Built 1955 Load: 30.5 t ADT: 650
Showing 6,751-6,800 of 27,743 bridges
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.