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
FREDRICKSON PLACE
FairOver: SKOKIE DITCH
.2 M E 41, Lake, IL
Built 1985 Load: 32.4 t ADT: 900
WOODLAND DRIVE
FairOver: FLINT CREEK
1 M N23, 2 M W59, Lake, IL
Built 2015 Load: 32.4 t ADT: 325
WALDEN LANE
FairOver: RAVINE
WALDEN AT WESTLEIH, Lake, IL
Built 1914 Load: 32.4 t ADT: 175
ONWENTSIA ROAD
FairOver: SKOKIE RIVER
ONWENTSIA W GREEN BA, Lake, IL
Built 1993 Load: 32.4 t ADT: 525
LAKE SHR.DR.
FairOver: ROUND LAKE OUTFALL
1.2M.W.OF IL-83, Lake, IL
Built 1990 Load: 32.4 t ADT: 850
MAC GILLIS DR
FairOver: SQUAW CREEK
0.1 MI S IL 134, Lake, IL
Built 2016 Load: 32.4 t ADT: 1,250
ILL 23 FAP 68
FairOver: BUCK CREEK
2.36 MI S OF US 52, LaSalle, IL
Built 1970 Load: 32.4 t ADT: 3,350
FAS258 CH2
FairOver: INDIAN CREEK
E 2075 N 3510, LaSalle, IL
Built 1959 Load: 32.4 t ADT: 1,750
TR 285
FairOver: LITTLE VERMILLION R
N 30TH E 410, LaSalle, IL
Built 1965 Load: 32.4 t ADT: 625
CH 1
FairOver: CROOKED LEG CREEK
E 1553,N 4090, LaSalle, IL
Built 1976 Load: 32.4 t ADT: 775
CH 64
FairOver: VERMILION RIVER
N 15TH,E 1550, LaSalle, IL
Built 1976 Load: 32.4 t ADT: 1,150
TR 155A
FairOver: MISSION CREEK
N 39TH E 2860, LaSalle, IL
Built 1976 Load: 32.4 t ADT: 75
CH 40
FairOver: OTTER CREEK
N 13TH E2490, LaSalle, IL
Built 1979 Load: 32.4 t ADT: 600
TR 187 N 37TH
FairOver: SPRING CREEK
N 37TH E 125, LaSalle, IL
Built 1979 Load: 32.4 t ADT: 200
TR 210 E 1175TH
FairOver: BR INDIAN CREEK
E 1175TH N 4615, LaSalle, IL
Built 1980 Load: 32.4 t ADT: 50
TR 205 N 36TH
FairOver: TOMAHAWK CREEK
N36TH E680, LaSalle, IL
Built 1980 Load: 32.4 t ADT: 25
TR 535 N 14TH RD
FairOver: PRAIRIE CREEK
N14TH E 1925, LaSalle, IL
Built 1980 Load: 32.4 t ADT: 275
FAS 1273/CH 36
FairOver: DEADLY RUN
N2550 RD E2950, LaSalle, IL
Built 1980 Load: 32.4 t ADT: 1,050
TR 407 N 24TH
FairOver: COVEL CR
N 24TH E 1860, LaSalle, IL
Built 1981 Load: 32.4 t ADT: 25
TR 75 N 4325TH
FairOver: INDIAN CR
N 4325TH E 1525, LaSalle, IL
Built 1981 Load: 32.4 t ADT: 50
TR 571
FairOver: LONG POINT CR
N 1 ST RD E 850, LaSalle, IL
Built 1981 Load: 32.4 t ADT: 50
TR 018
FairOver: TRIB CEDAR CREEK
E1ST N2120, LaSalle, IL
Built 1982 Load: 32.4 t ADT: 75
TR 322 E 19TH
FairOver: BR COVEL CR
E 19TH N 2440, LaSalle, IL
Built 1982 Load: 32.4 t ADT: 25
TR-156 E 9TH
FairOver: PECUMSAUGAN CR
E 9TH N 3340, LaSalle, IL
Built 1982 Load: 32.4 t ADT: 100
TR 160
FairOver: SUTPHENS RUN
E 9TH N 4465, LaSalle, IL
Built 1983 Load: 32.4 t ADT: 25
TR 169A
FairOver: L VERMILION '
N 3850TH E 620, LaSalle, IL
Built 1983 Load: 32.4 t ADT: 50
TR 238 E 14TH
FairOver: INDIAN CREEK
E14TH N4440TH, LaSalle, IL
Built 1983 Load: 32.4 t ADT: 225
FAS 269 (CH12, N46
FairOver: FOURMILE GROVE CR
N46TH E750, LaSalle, IL
Built 1983 Load: 32.4 t ADT: 375
TR 3 N48TH
FairOver: TRIB INDIAN CREEK
N48TH E948, LaSalle, IL
Built 1983 Load: 32.4 t ADT: 25
TR 160 E 9TH
FairOver: BR INDIAN CR
E9TH,N4750TH, LaSalle, IL
Built 1983 Load: 32.4 t ADT: 25
TR 166 B
FairOver: LONG PT CR
E 10TH N 370 GROVLD, LaSalle, IL
Built 1984 Load: 32.4 t ADT: 25
TR 158
FairOver: TOMAHAWK CR OPHIR
E 9TH N 3705, LaSalle, IL
Built 1984 Load: 32.4 t ADT: 25
TR 354
FairOver: CREEK
E 21ST RD N 2450, LaSalle, IL
Built 1984 Load: 32.4 t ADT: 25
TR 493
FairOver: CREEK
TH RD E 2950, LaSalle, IL
Built 1984 Load: 32.4 t ADT: 75
TR 48
FairOver: BAILEY CR
E 3RD RD N 1857, LaSalle, IL
Built 1984 Load: 32.4 t ADT: 150
TR 330 E 1950TH RD
FairOver: INDIAN CREEK
E 1950TH RD N 4000, LaSalle, IL
Built 1986 Load: 32.4 t ADT: 50
FAS 369 N4TH RD
FairOver: LONG POINT CREEK
N 4TH RD E 1050, LaSalle, IL
Built 1986 Load: 32.4 t ADT: 125
TR 104
FairOver: STREAM
E 6TH N 1850, LaSalle, IL
Built 1985 Load: 32.4 t ADT: 25
TR 354
FairOver: TRIB OF COVEL CREEK
E 21ST N 1825, LaSalle, IL
Built 1985 Load: 32.4 t ADT: 25
TR 453 N 21ST RD
FairOver: CEDAR CREEK
N 21ST RD E 0060, LaSalle, IL
Built 1986 Load: 32.4 t ADT: 50
TR 310
FairOver: COVEL CREEK
E18TH,N2475TH, LaSalle, IL
Built 1988 Load: 32.4 t ADT: 100
TR 2 E 12TH RD
FairOver: LONG POINT CR
E 12TH RD N 450, LaSalle, IL
Built 1986 Load: 32.4 t ADT: 25
TR 332B
FairOver: BRANCH COVEL CREEK
E 20TH N2260, LaSalle, IL
Built 1987 Load: 32.4 t ADT: 25
TR 354 A
FairOver: OTTER CREEK
E 21ST RD N 1560, LaSalle, IL
Built 1987 Load: 32.4 t ADT: 25
MS 7112/PREV TR375
FairOver: S. KICKAPOOCREEK
N 2553 RD E 2550, LaSalle, IL
Built 1987 Load: 32.4 t ADT: 775
TR 109
FairOver: INDIAN CREEK
N.4101ST, E.1705TH, LaSalle, IL
Built 1989 Load: 32.4 t ADT: 25
TR567
FairOver: LONG POINT CREEK
N 3RD RD,E 920, LaSalle, IL
Built 1988 Load: 32.4 t ADT: 25
TR 503
FairOver: OTTER CREEK
N 16TH RD,E 2110, LaSalle, IL
Built 1988 Load: 32.4 t ADT: 1,700
TR 441
FairOver: BR COVEL CREEK
N22ND, E196TH, LaSalle, IL
Built 1989 Load: 32.4 t ADT: 75
CH 22
FairOver: INDIAN CREEK
N.42ND, E2195, LaSalle, IL
Built 1991 Load: 32.4 t ADT: 750
Showing 8,501-8,550 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.