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
FAU 9018/ WANDA RD
FairOver: CAHOKIA DIV CANAL
1.0 MI NORTH OF POAG, Madison, IL
Built 1986 Load: 32.4 t ADT: 1,800
STIEGLITE RD/ TR 1
FairOver: PADDOCK CK
2.2 NW OF PRAIREITOW, Madison, IL
Built 1989 Load: 32.4 t ADT: 50
TR 55
FairOver: HONEYCUT BRANCH
4.5 MILES N OF ALTON, Madison, IL
Built 1986 Load: 32.4 t ADT: 100
TR 21
FairOver: TRIB W FRK W R CRK
4.5 MI N OF ALTON, Madison, IL
Built 1988 Load: 32.4 t ADT: 150
CH 36 LAGEMAN RD
FairOver: LITTLE PIASA CREEK
0.15 S OF JERSEY CO, Madison, IL
Built 1985 Load: 32.4 t ADT: 1,300
CULP LANE/ TR 117
FairOver: ROCKY BRANCH CREEK C
.8 MI NORTH BETHALTO, Madison, IL
Built 1986 Load: 32.4 t ADT: 1,400
SNAKE RD TR 122
FairOver: E FORK-WOOD RIV CR
2.0 MI NW DORSEY, Madison, IL
Built 1987 Load: 32.4 t ADT: 150
BARENFINGR RD/TR21
FairOver: E FORK SHERRY CK
2.5 MI NE PRAIRIETOW, Madison, IL
Built 1989 Load: 32.4 t ADT: 50
STRAUBE LN/ TR 21A
FairOver: W. FORK WOOD RIVER
4.5 NORTH OF ALTON, Madison, IL
Built 1990 Load: 32.4 t ADT: 100
BRCKYD HILL RD/TR2
FairOver: TRIB. TO CAHOKIA CK.
1.2 MI. W. OF WORDEN, Madison, IL
Built 1986 Load: 32.4 t ADT: 200
TR 103 UNTERBRINK
FairOver: INDIAN CREEK
1.4 MI. W MIDWAY, Madison, IL
Built 1994 Load: 32.4 t ADT: 100
HUETTE RD(TR 150)
FairOver: BR WOOD RIVER CRK
1.9MI N OF DORSEY, Madison, IL
Built 1998 Load: 32.4 t ADT: 125
CULP LN/MSS 901
FairOver: E FK WOODRIVER CK
BETHALTO, Madison, IL
Built 2009 Load: 32.4 t ADT: 1,400
CREST DRIVE / MS82
FairOver: BRANCH OF WOOD RIVER
CREST DR NOF RT 140, Madison, IL
Built 1982 Load: 32.4 t ADT: 450
FAU 9093/19TH STRE
FairOver: TRRA&NEW CONRR&ICGRR
19ST OVER NOFLK&WSRR, Madison, IL
Built 1981 Load: 32.4 t ADT: 6,300
STADIUM DR.
FairOver: ROCKY BRANCH CRK
0.2 MI S CULP RD., Madison, IL
Built 2006 Load: 32.4 t ADT: 1,400
IL 37
FairOver: IC RR
4.25 MI N SALEM, Marion, IL
Built 1930 Load: 32.4 t ADT: 2,350
FAI-57 NB
FairOver: CROOKED CREEK
3 MI S SALEM INT, Marion, IL
Built 1968 Load: 32.4 t ADT: 9,650
FAI-57 SB
FairOver: CROOKED CREEK
3 MI S SALEM INT, Marion, IL
Built 1968 Load: 32.4 t ADT: 9,650
I-57 NB
FairOver: IC RR
3 MI N SALEM INT, Marion, IL
Built 1968 Load: 32.4 t ADT: 8,350
I-57 SB
FairOver: ICRR
3 MI N SALEM INT, Marion, IL
Built 1967 Load: 32.4 t ADT: 8,350
TR-64
FairOver: CROOKED CREEK
2 MI E CENTRAL CITY, Marion, IL
Built 1974 Load: 32.4 t ADT: 200
TR-337
FairOver: ZION HILL BRANCH
0.5 MI NE RACON CK R, Marion, IL
Built 1975 Load: 32.4 t ADT: 100
TR-401A
FairOver: KRIETEMEYER BRANCH
0.5 MI E CENTRALIA, Marion, IL
Built 1974 Load: 32.4 t ADT: 375
FAS-789 (CH 27)
FairOver: DUMS CREEK
3 MI N IUKA, Marion, IL
Built 1986 Load: 32.4 t ADT: 675
FAS-789
FairOver: FULTON CREEK
2.5 MI S IUKA, Marion, IL
Built 1995 Load: 32.4 t ADT: 725
TR 249A
FairOver: BRUBAKER CREEK
1.5 MI SE SALEM, Marion, IL
Built 1996 Load: 32.4 t ADT: 400
TR 239
FairOver: ICG RR
4.5 MI E IUKA, Marion, IL
Built 1999 Load: 32.4 t ADT: 25
FAU 8592
FairOver: JOHNNIE BRANCH
N PART CENTRALIA, Marion, IL
Built 1999 Load: 32.4 t ADT: 900
TR 168
FairOver: JIMS CREEK
5 MI NNW SALEM, Marion, IL
Built 2004 Load: 32.4 t ADT: 75
TR-28
FairOver: WEBSTER CREEK
SE WAMAC, Marion, IL
Built 1975 Load: 32.4 t ADT: 125
FAU-8556
FairOver: SALEM RESERVOIR DAM
SALEM, Marion, IL
Built 1993 Load: 32.4 t ADT: 475
TR 77 (TH-C68)
FairOver: CREEK
STEUBEN SEC. 19, Marshall, IL
Built 1998 Load: 32.4 t ADT: 50
TR 86 (TH-S34)
FairOver: SANDY CREEK
T30N-R2W-3PM SEC 2, Marshall, IL
Built 1977 Load: 32.4 t ADT: 50
TR 33 (TH-C60)
FairOver: CREEK
T30N-R2W-3PM SEC 3, Marshall, IL
Built 1986 Load: 32.4 t ADT: 75
TR 96 (TH-S38)
FairOver: SANDY CREEK
T30N-R1W-3PM SEC 6, Marshall, IL
Built 1979 Load: 32.4 t ADT: 25
TR 150 (TH-S60)
FairOver: SANDY CREEK
T30N-RIE-3PM SEC 10, Marshall, IL
Built 1979 Load: 32.4 t ADT: 25
TR 37 (TH-C60)
FairOver: JUDD CREEK
T30N-R1E-3PM SEC 7, Marshall, IL
Built 1980 Load: 32.4 t ADT: 75
TR 146 (TH-S 59)
FairOver: SANDY CREEK
T30N-RIE-3PM SEC 10, Marshall, IL
Built 1984 Load: 32.4 t ADT: 25
TR 147 (TH-D17)
FairOver: HALLENBACK CREEK
T29N-R1W-3PM SEC 35, Marshall, IL
Built 1978 Load: 32.4 t ADT: 25
TR 68 (TH-S 27)
FairOver: CROW CREEK
T29N-R2W-3PM SEC 29, Marshall, IL
Built 1983 Load: 32.4 t ADT: 50
TR 68 (TH-S27)
FairOver: ATSF RR
T29N-R2W-3PM SEC 29, Marshall, IL
Built 1986 Load: 32.4 t ADT: 50
TR 42 (TH-S17)
FairOver: THENIUS CREEK
T12N-R9E-4PM SEC 2, Marshall, IL
Built 1978 Load: 32.4 t ADT: 25
TR 42 (TH-S17)
FairOver: THENIUS CREEK
T12N-R9E-4PM SEC 2, Marshall, IL
Built 1980 Load: 32.4 t ADT: 25
TR 24 (TH-R66)
FairOver: CREEK
T12N-R8E-4PM SEC 13, Marshall, IL
Built 1980 Load: 32.4 t ADT: 50
THENIUS ROAD
FairOver: THENIUS CR
VILLAGE OF SPARLAND, Marshall, IL
Built 1987 Load: 32.4 t ADT: 150
FAS 572 (CH 5)
FairOver: DUFF ARMSTRONG DITCH
1.5 M SW EASTON, Mason, IL
Built 2012 Load: 32.4 t ADT: 200
TR 43
FairOver: QUIVER CR
2.5 MI W TOPEKA, Mason, IL
Built 1984 Load: 32.4 t ADT: 25
TR43
FairOver: QUIVER CREEK
2.5MI W TOPEKA, Mason, IL
Built 1985 Load: 32.4 t ADT: 25
TR 112
FairOver: MASON TAZEWELL DITCH
1.0 MI E OF TOPEKA, Mason, IL
Built 1987 Load: 32.4 t ADT: 25
Showing 8,851-8,900 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.