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
TR 166 B
FairOver: DRAINAGE DITCH
E 10TH RD, N 590, LaSalle, IL
Built 1991 Load: 32.4 t ADT: 25
TR467
FairOver: STREAM
N. 20th E. 1038, LaSalle, IL
Built 1990 Load: 32.4 t ADT: 75
CH 10
FairOver: SUTPHENS RUN
E.7TH, N.4510, LaSalle, IL
Built 1991 Load: 32.4 t ADT: 275
TR 244
FairOver: STREAM
E.14TH N2915, LaSalle, IL
Built 1994 Load: 32.4 t ADT: 275
TR99
FairOver: SOMONAUK CREEK
N4250th E2610, LaSalle, IL
Built 1995 Load: 32.4 t ADT: 75
TR 454C
FairOver: HOG RUN CREEK
.22 M S OF FAS 272, LaSalle, IL
Built 1996 Load: 32.4 t ADT: 50
TR 211B
FairOver: BR OF BUCK CREEK
N35TH, E1675, LaSalle, IL
Built 1997 Load: 32.4 t ADT: 275
TR 238
FairOver: CROOKED LEG CRK
N. 4135 E 14TH RD, LaSalle, IL
Built 1997 Load: 32.4 t ADT: 200
TR 173
FairOver: UNNAMED STREAM
N3853, E2680, LaSalle, IL
Built 1997 Load: 32.4 t ADT: 125
TR 205A
FairOver: CROOKED LEG CREEK
N 36TH, E 1915, LaSalle, IL
Built 1998 Load: 32.4 t ADT: 100
TR 320
FairOver: CROOKED LEG CREEK
E 18TH AT N3605, LaSalle, IL
Built 2000 Load: 32.4 t ADT: 175
TR 277
FairOver: UNNAMED STREAM
JUST E OF E1888TH RD, LaSalle, IL
Built 2001 Load: 32.4 t ADT: 200
TR 257
FairOver: PECUMSAUGEN CREEK
N3150, E785, LaSalle, IL
Built 2000 Load: 32.4 t ADT: 125
FAS 272
FairOver: HOG RUN
N21, E 2915, LaSalle, IL
Built 2001 Load: 32.4 t ADT: 950
TR 156
FairOver: PECUMSAUGEN CREEK
E9TH, N3215, LaSalle, IL
Built 2001 Load: 32.4 t ADT: 100
TR 205
FairOver: CROOKED LEG CREEK
N36 RD, E1760, LaSalle, IL
Built 2002 Load: 32.4 t ADT: 150
E 25TH RD
FairOver: UNNAMED CREEK
E 25 N3750, LaSalle, IL
Built 2003 Load: 32.4 t ADT: 100
FAS 273 (CH 5)
FairOver: WAUPECAN CREEK
N 17TH, E 2965, LaSalle, IL
Built 2002 Load: 32.4 t ADT: 525
TR 240
FairOver: EGG BAG CREEK
E 14TH N 1410, LaSalle, IL
Built 2008 Load: 32.4 t ADT: 100
FAS259 CH3
FairOver: STREAM
E 2653,N 3725, LaSalle, IL
Built 1973 Load: 32.4 t ADT: 1,350
MS 2360 CLARK ST
FairOver: LONG CREEK
CLARK ST, LaSalle, IL
Built 1986 Load: 32.4 t ADT: 300
Monroe Street
FairOver: Coal Run Creek
R3E, T21N, 3rd. PMMd, LaSalle, IL
Built 1990 Load: 32.4 t ADT: 125
SHABBONA STREET
FairOver: PRAIRIE CREEK
SO OF 1ST STREET, LaSalle, IL
Built 1983 Load: 32.4 t ADT: 775
FAP-327/FR-1866
FairOver: ALLISON DITCH NO 2
.5 MI W LAKE LAW INT, Lawrence, IL
Built 1960 Load: 32.4 t ADT: 200
FAS-1808 (SBI-12)
FairOver: CSXT RR
E OF LAWRENCEVILLE, Lawrence, IL
Built 1984 Load: 32.4 t ADT: 2,250
TR-227A
FairOver: ENGLAND DITCH
1.5 MI SW BILLET, Lawrence, IL
Built 1977 Load: 32.4 t ADT: 275
TR-92
FairOver: INDIAN CREEK
0.5 MI SW BRIDGEPORT, Lawrence, IL
Built 1978 Load: 32.4 t ADT: 100
TR-10B
FairOver: SUGAR CREEK
1.5 MI W HELENA, Lawrence, IL
Built 1978 Load: 32.4 t ADT: 25
TR-17
FairOver: CREEK
2 MI E BIRDS, Lawrence, IL
Built 1980 Load: 32.4 t ADT: 50
TR-171
FairOver: INDIAN CREEK
1.5 MI E BRIDGEPORT, Lawrence, IL
Built 1980 Load: 32.4 t ADT: 50
TR-70
FairOver: RACCOON CREEK
6 MI SSW BRIDGEPORT, Lawrence, IL
Built 1981 Load: 32.4 t ADT: 20
TR-2
FairOver: BUGABOO CREEK
2.5 MI NE SUMNER, Lawrence, IL
Built 1981 Load: 32.4 t ADT: 75
TR-16
FairOver: CRABAPPLE CREEK
2 MI S SUMNER, Lawrence, IL
Built 1982 Load: 32.4 t ADT: 50
TR-40
FairOver: MUDDY CREEK
1.75 MI N RED HIL SP, Lawrence, IL
Built 1982 Load: 32.4 t ADT: 50
TR-116
FairOver: RACCOON CREEK
7.5 MI S BRIDGEPORT, Lawrence, IL
Built 1982 Load: 32.4 t ADT: 35
TR-40
FairOver: THE SLOUGH
2 MI ESE CHAUNCEY, Lawrence, IL
Built 1984 Load: 32.4 t ADT: 50
TR-113
FairOver: EMBARRAS RIVER
2 MI E PETROLIA, Lawrence, IL
Built 1983 Load: 32.4 t ADT: 100
TR 231A
FairOver: ENGLAND DITCH
1 MI SW BILLET, Lawrence, IL
Built 1985 Load: 32.4 t ADT: 35
TR-213
FairOver: EMBARRAS RIVER
1.5 MI E BILLET, Lawrence, IL
Built 1990 Load: 32.4 t ADT: 125
FAS-807
FairOver: CRABAPPLE CREEK
S EDGE SUMNER, Lawrence, IL
Built 1993 Load: 32.4 t ADT: 1,400
TR 204B
FairOver: ENGLAND DITCH
2 MI N ST FRANVLE, Lawrence, IL
Built 1998 Load: 32.4 t ADT: 150
TR 18
FairOver: PAUL CREEK
4 MI S CHAUNCEY, Lawrence, IL
Built 2000 Load: 32.4 t ADT: 25
FAS 801-CH10
FairOver: BRANCH BRUSHY CREEK
2 MI E BIRDS, Lawrence, IL
Built 2002 Load: 32.4 t ADT: 450
TR 5
FairOver: DRAINAGE DITCH
1 MI NE BIRDS, Lawrence, IL
Built 2003 Load: 32.4 t ADT: 50
TR-54
FairOver: BRANCH RACCOON CREEK
3 MI SW BRIDGEPORT, Lawrence, IL
Built 1979 Load: 32.4 t ADT: 20
CH-23
FairOver: TRIB MUDDY CREEK
NE RED HILLS ST PK, Lawrence, IL
Built 1993 Load: 32.4 t ADT: 100
TR 217C (PRIVATE R
FairOver: CREEK
4.5 MI S. SUMNER, Lawrence, IL
Built 1938 Load: 32.4 t ADT: 10
ILL 251
FairOver: PIKE CREEK
2.34 MI N OF US 52, Lee, IL
Built 2010 Load: 32.4 t ADT: 1,600
ILL 26
FairOver: COON CREEK
3.2 MI S OF AMBOY RD, Lee, IL
Built 1981 Load: 32.4 t ADT: 1,500
ILL 26 & US 52
FairOver: PLUM HOLLOW CR
1.66 MI N JCT ILL 2, Lee, IL
Built 1967 Load: 32.4 t ADT: 4,300
Showing 8,551-8,600 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.