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
CH 15
FairOver: MARTINTON DITCH #3
2MI W .2N DONOVAN, Iroquois, IL
Built 1988 Load: 32.4 t ADT: 50
TR 344
FairOver: BEAVER CREEK
1.5 MI N BEAVERVILLE, Iroquois, IL
Built 1983 Load: 32.4 t ADT: 150
TR 368
FairOver: BEAVER CREEK
1.25N 1.25E BVILLE, Iroquois, IL
Built 1983 Load: 32.4 t ADT: 25
TR 19
FairOver: BEAVER CREEK
1.5N,1.75E BEAVERVLL, Iroquois, IL
Built 1983 Load: 32.4 t ADT: 25
TR 251
FairOver: TRIB TO COON CREEK
4E 2S OF WOODLAND, Iroquois, IL
Built 1983 Load: 32.4 t ADT: 75
TR 288
FairOver: COON CREEK
1.5E 1.5 SWOODLAND, Iroquois, IL
Built 1986 Load: 32.4 t ADT: 75
TR 5
FairOver: N BR LANGAN CR
2.5 MI W CHEBANSE, Iroquois, IL
Built 1939 Load: 32.4 t ADT: 50
TR 140
FairOver: LANGAN CR
2.32 MI S CHEBANSE, Iroquois, IL
Built 1980 Load: 32.4 t ADT: 200
TR 188
FairOver: LANGAN CR
3.5 NE LIERABLE, Iroquois, IL
Built 1981 Load: 32.4 t ADT: 50
TR 58
FairOver: W BR LANGAN CREEK
0.25S 4W OF CLIFTON, Iroquois, IL
Built 1987 Load: 32.4 t ADT: 25
TR 108
FairOver: UNNAMED DRAINAGE DT
1 S 1.75 W CHEBANSE, Iroquois, IL
Built 1983 Load: 32.4 t ADT: 50
TR 120
FairOver: LANGAN CREEK
2.71 MI. S. CHEBANSE, Iroquois, IL
Built 2002 Load: 32.4 t ADT: 200
TR 91
FairOver: PIKE CR
0.5 MI W RT 52, Iroquois, IL
Built 1977 Load: 32.4 t ADT: 50
TR 219
FairOver: STREAM
2.2 MI E ILL 49, Iroquois, IL
Built 1981 Load: 32.4 t ADT: 25
TR 243
FairOver: SHAVETAIL CR
.25M E ILL 49, Iroquois, IL
Built 1988 Load: 32.4 t ADT: 50
TR94A
FairOver: DRAINAGE DITCH
1 MI S 1MIE DANFORTH, Iroquois, IL
Built 1978 Load: 32.4 t ADT: 25
TR 89
FairOver: BRANCH OF LANGAN CR
2.5N,3.5W DANFORTH, Iroquois, IL
Built 1984 Load: 32.4 t ADT: 50
TR 159
FairOver: SPRING CREEK
5 MI E 1 MI N GILMAN, Iroquois, IL
Built 2009 Load: 32.4 t ADT: 50
TR 339
FairOver: TRIB TO PIGEON CR
.6 MI E CISSA PARK, Iroquois, IL
Built 1977 Load: 32.4 t ADT: 150
TR 180
FairOver: FOUNTAIN CREEK
1 MI S FOUNTAIN CR, Iroquois, IL
Built 1981 Load: 32.4 t ADT: 50
TR 371
FairOver: WHISKEY CREEK
2.5E RT 49 1.ON CO L, Iroquois, IL
Built 1983 Load: 32.4 t ADT: 75
CH 35
FairOver: SPRING CREEK
4 MI NE CRESCENTCITY, Iroquois, IL
Built 1996 Load: 32.4 t ADT: 100
CH 45(N)
FairOver: IROQUOIS RIVER
SEC 23 T27N R13W 2ND, Iroquois, IL
Built 1995 Load: 32.4 t ADT: 50
TR 137
FairOver: TRIB TO SPRING CREEK
0.5E 2N CRESCENT CTY, Iroquois, IL
Built 1985 Load: 32.4 t ADT: 50
TR 14A
FairOver: SPRING CREEK
2.5 MI. N. LODA, Iroquois, IL
Built 1976 Load: 32.4 t ADT: 75
TR 349
FairOver: SPRING CR
1.5 MI W INT 57, Iroquois, IL
Built 1978 Load: 32.4 t ADT: 75
TR 349
FairOver: TRIB TO SPRING CREEK
1.25 MI E US RT 45, Iroquois, IL
Built 1980 Load: 32.4 t ADT: 75
TR 2B
FairOver: STREAM
2.5 MI NW OF LODA, Iroquois, IL
Built 1983 Load: 32.4 t ADT: 50
TR186
FairOver: DRAINAGE DITCH
2MI E RTE 49 &1MIS52, Iroquois, IL
Built 1977 Load: 32.4 t ADT: 50
TR 55B
FairOver: MARTINTON DITCH NO 3
0.1 MI E MARTINTON, Iroquois, IL
Built 1981 Load: 32.4 t ADT: 150
TR 99B
FairOver: MIDDLEPORT DITCH TRI
2 MI E ILL 1, Iroquois, IL
Built 2010 Load: 32.4 t ADT: 75
TR 324
FairOver: TRIB TO SUGAR CK
2 MI SE MILFORD, Iroquois, IL
Built 1978 Load: 32.4 t ADT: 75
TR-301A
FairOver: Mud Creek
.25S, 2W MILFORD, Iroquois, IL
Built 1990 Load: 32.4 t ADT: 75
TR 333
FairOver: Gay Creek
3 mi. S. OF Milford, Iroquois, IL
Built 2014 Load: 32.4 t ADT: 75
TR 27
FairOver: DRAINAGE DITCH
3 MI S CO LINE, Iroquois, IL
Built 1981 Load: 32.4 t ADT: 50
TR 5
FairOver: STREAM
3E,1S NW COR OF CNTY, Iroquois, IL
Built 1983 Load: 32.4 t ADT: 50
TR-33
FairOver: Creek
3000N, 450E, Iroquois, IL
Built 1991 Load: 32.4 t ADT: 25
FAS 1320
FairOver: BEAVER CR
4 MI W OF PAPINEAU, Iroquois, IL
Built 1978 Load: 32.4 t ADT: 475
TR 204
FairOver: DRAINAGE DITCH
6.5 MI SW PAPINEAU, Iroquois, IL
Built 1981 Load: 32.4 t ADT: 25
TR 224
FairOver: DRAINAGE DITCH
4.5 M SW PAPINEAU, Iroquois, IL
Built 1988 Load: 32.4 t ADT: 100
TR 363
FairOver: TRIB TO PIGEON CR
1.5 MI W ILL RT 49, Iroquois, IL
Built 1979 Load: 32.4 t ADT: 50
TR 100
FairOver: UNNAMED TRIB
1 MI. S. CH 44, Iroquois, IL
Built 1994 Load: 32.4 t ADT: 50
TR 62
FairOver: STREAM
4E,2N OF LODA, Iroquois, IL
Built 1984 Load: 32.4 t ADT: 25
TR 88A
FairOver: TRIB. TO LITTLE MUD
3 M W CISSNA PARK, Iroquois, IL
Built 1996 Load: 32.4 t ADT: 25
TR 347A
FairOver: TRIB MUD CREEK
2 MI. N 2.1 MIWGREER, Iroquois, IL
Built 1976 Load: 32.4 t ADT: 75
TR 352
FairOver: STREAM
.1 MI S CH 10, Iroquois, IL
Built 1981 Load: 32.4 t ADT: 25
TR-353B
FairOver: Creek
1N, 3.25E GREER, Iroquois, IL
Built 1990 Load: 32.4 t ADT: 25
TR 372
FairOver: MUD CREEK
3.5 MI NE WELLINGTON, Iroquois, IL
Built 1997 Load: 32.4 t ADT: 50
TR 2A
FairOver: TRIB TO SPING CR
FORD-IROQ LINE, Iroquois, IL
Built 1976 Load: 32.4 t ADT: 50
TR 10 B
FairOver: TRIB SPRING CR
.5 M E .25THAWVILLE, Iroquois, IL
Built 1978 Load: 32.4 t ADT: 20
Showing 8,201-8,250 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.