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
LAKEVIEW AVE
FairOver: INLET FROM DIAMOND L
S EDGE OF DIAMOND LK, Lake, IL
Built 1969 Load: 28.5 t ADT: 175
TR 4
FairOver: STREAM
E 30TH N 3125, LaSalle, IL
Built 1965 Load: 28.5 t ADT: 50
TR 427
FairOver: COVEL CREEK
N 23RD E 1825, LaSalle, IL
Built 1971 Load: 28.5 t ADT: 50
CH 14 AMBOY RD
FairOver: MAIN DITCH CH 14 AMB
1.0 MI E OF ILL 26, Lee, IL
Built 1946 Load: 28.5 t ADT: 550
FAS 1362 CH 8
FairOver: PIKE CREEK
5 MI W OF OCOYA, Livingston, IL
Built 1955 Load: 28.5 t ADT: 400
FAS 1362 CH 8
FairOver: PIKE CREEK
3.5 MI W OF OCOYA, Livingston, IL
Built 1950 Load: 28.5 t ADT: 400
MT PULASKI-ELKHART
FairOver: SALT CK OVERFLOW
2.5 MI W MT PULASKI, Logan, IL
Built 1934 Load: 28.5 t ADT: 900
TR 108
FairOver: PRAIRIE CK
1 N 2.5 MI E EMDEN, Logan, IL
Built 1972 Load: 28.5 t ADT: 50
HUMBERT RD/FAU 899
FairOver: BLACK CK
N EDGE OF ALTON, Madison, IL
Built 1953 Load: 28.5 t ADT: 7,400
TR 143
FairOver: RAMSEY CREEK
6 MI SE NOKOMIS, Montgomery, IL
Built 1984 Load: 28.5 t ADT: 75
CH 23
FairOver: BIG SANDY CRK.
4 MI. S. LYNVILLE, Morgan, IL
Built 1951 Load: 28.5 t ADT: 100
ILL 10(FAP 721)
FairOver: SANGAMON RIVER
1.5 MI W OF I-72, Piatt, IL
Built 1977 Load: 28.5 t ADT: 3,100
TR 106
FairOver: TRIB OF KISER CREEK
2.5MI. SE OF BARRY, Pike, IL
Built 1915 Load: 28.5 t ADT: 25
ILL 3
FairOver: ROCK CREEK
IN ROCKWOOD, Randolph, IL
Built 1932 Load: 28.5 t ADT: 3,450
TR 108
FairOver: GRAVEL CREEK
TR108 OVER GRAVEL CR, Randolph, IL
Built 1961 Load: 28.5 t ADT: 175
FAS-802
FairOver: TURKEY CREEK
1 MI NE GALLAGHER, Richland, IL
Built 1963 Load: 28.5 t ADT: 250
TR 179
FairOver: PANKEY CREEK
1.5 M NE HARRISBURG, Saline, IL
Built 1977 Load: 28.5 t ADT: 100
TR 285
FairOver: HORSE
2.5 MI SE ROCHESTER, Sangamon, IL
Built 1972 Load: 28.5 t ADT: 550
EAST MILL ROAD
FairOver: CEDAR CREEK
2.0 MI NW OF DAKOTA, Stephenson, IL
Built 1968 Load: 28.5 t ADT: 75
BENSON RD - TR 232
FairOver: MACKINAW R
SE-27-T24NR3W, Tazewell, IL
Built 1971 Load: 28.5 t ADT: 150
TR 90
FairOver: STREAM
NE-1-T23NR5W, Tazewell, IL
Built 1965 Load: 28.5 t ADT: 10
FAI 57 RAMP 233 OF
FairOver: STREAM
0.3 MI E DONGOLA, Union, IL
Built 1959 Load: 28.5 t ADT: 150
FAS 0923
FairOver: CREEK
1.7M.E.JCT.FAP100, Union, IL
Built 1963 Load: 28.5 t ADT: 325
TR 152
FairOver: TALBOT CREEK
SW 1/4 SEC 1 T11NR2W, Warren, IL
Built 1973 Load: 28.5 t ADT: 25
BUNKER HILL RD
FairOver: ROCK CREEK
2 MI S OF MORRISON, Whiteside, IL
Built 1967 Load: 28.5 t ADT: 100
YAGER ROAD
FairOver: CO. DITCH NO. 1
2 MI SE PROPHETSTOWN, Whiteside, IL
Built 1959 Load: 28.5 t ADT: 125
N BLUE MT ROAD
FairOver: E FORK OF PLUM RIVER
4 MI N MT.CARROLL, Carroll, IL
Built 1958 Load: 28.8 t ADT: 10
TR 63
FairOver: BUCKHART CREEK
4 NE OF EDINBURG, Christian, IL
Built 1964 Load: 28.8 t ADT: 175
TR 262
FairOver: SNYDER CREEK
4.6 MI S MARSHALL, Clark, IL
Built 1909 Load: 28.8 t ADT: 300
SUNSET RIDGE RD
FairOver: N BR CHICAGO RIVER
1.15 M N WILLOW P14, Cook, IL
Built 1949 Load: 28.8 t ADT: 7,200
N. FIELD BLVD.
FairOver: PARKING AREA
RANDOLPH TO BENTON, Cook, IL
Built 2005 Load: 28.8 t ADT: 3,550
I-294 SB
FairOver: CC RR
0.15M N ILL 56, Cook, IL
Built 1958 Load: 28.8 t ADT: 78,200
CH 8(FAS 679)
FairOver: S BRANCH BROUILLETTS
.75 MI E OF IL 1, Edgar, IL
Built 1958 Load: 28.8 t ADT: 250
TR-31
FairOver: BRANCH SALT CREEK
3 MI N TEUTOPOLIS, Effingham, IL
Built 1977 Load: 28.8 t ADT: 475
FAI-70 WB
FairOver: CSXT RR
1.5 MI W BROWNSTN IN, Fayette, IL
Built 1964 Load: 28.8 t ADT: 11,350
TR 55 LYMAN
FairOver: STREAM
1670E 1600N, Ford, IL
Built 1969 Load: 28.8 t ADT: 50
TR 105A PATTON
FairOver: THE BIG FOUR
1710E,200N, Ford, IL
Built 1970 Load: 28.8 t ADT: 100
TR 11 MONA
FairOver: STREAM
1680 E 3400N, Ford, IL
Built 1969 Load: 28.8 t ADT: 75
ILL 14
FairOver: STREAM E OF BENTON
5 MI E OF BENTON, Franklin, IL
Built 1923 Load: 28.8 t ADT: 1,850
ILL 149
FairOver: BIG MUDDY RIVER
1.6 MI E ZEIGLER, Franklin, IL
Built 1928 Load: 28.8 t ADT: 2,250
FAS 329 CH 10 SA 1
FairOver: GAY CREEK
1.32 MI W OLD ILL 1, Iroquois, IL
Built 1961 Load: 28.8 t ADT: 500
TR 157 SEC 110 TR
FairOver: SPRING CREEK
1 MI N 45&24 .5 MI E, Iroquois, IL
Built 1961 Load: 28.8 t ADT: 75
TR 353A
FairOver: STREAM
4 MI W ILL RTE 1, Iroquois, IL
Built 1960 Load: 28.8 t ADT: 25
TR 309
FairOver: TRIB TO MUD CR
3 MI SE MILFORD, Iroquois, IL
Built 1961 Load: 28.8 t ADT: 75
FAP-821 (ILL-15)
FairOver: BEAR CREEK
1 MI W MARKAM CITY, Jefferson, IL
Built 1957 Load: 28.8 t ADT: 3,500
TOWNSHIP ROAD NO.
FairOver: SMALLPOX CREEK
3 MILES SE GALENA, Jo Daviess, IL
Built 1963 Load: 28.8 t ADT: 100
CHURCH RD
FairOver: W. AUX SABLE
1 MI S OF PLATVILLE, Kendall, IL
Built 1959 Load: 28.8 t ADT: 125
TR 76
FairOver: HENDERSON CREEK
E.CTR-35-T13NR1E, Knox, IL
Built 1967 Load: 28.8 t ADT: 25
FAS 1176 CH 10
FairOver: FOURMILE GROVE
E 7TH,N 4725, LaSalle, IL
Built 1935 Load: 28.8 t ADT: 250
FAS-801
FairOver: EMBARRASS RIVER
4.5 MI E BIRDS, Lawrence, IL
Built 1960 Load: 28.8 t ADT: 325
Showing 6,451-6,500 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.