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
FAS 559A
FairOver: SUGAR CREEK
4.4 Mi N I-55, Logan, IL
Built 1976 Load: 42.8 t ADT: 250
FAP 320(IL 121)
FairOver: LONG CREEK
1.5 MI N MT ZION, Macon, IL
Built 1975 Load: 42.8 t ADT: 12,600
TR 328
FairOver: SPANISH CR
3.5 M S C-VILLE LAKE, Macoupin, IL
Built 1980 Load: 42.8 t ADT: 50
IL 159 & IL 143
FairOver: NSRR
0.1 MI NW EDWRDSVLLE, Madison, IL
Built 1936 Load: 42.8 t ADT: 11,500
MERMET ROAD
FairOver: MAIN DITCH
0.74 E OF US 45, Massac, IL
Built 1988 Load: 42.8 t ADT: 200
US 12
FairOver: NIPPERSINK CREEK
LAKE/MCHENRY CO.LINE, McHenry, IL
Built 1990 Load: 42.8 t ADT: 11,500
IL 78 SPUR
FairOver: LITTLE INDIAN CREEK
.23M S CASS CO. LINE, Morgan, IL
Built 1929 Load: 42.8 t ADT: 75
FAI 72 EB
FairOver: S FK MAUVAISE TERRE
1.6MI SW I72/OLD36, Morgan, IL
Built 1975 Load: 42.8 t ADT: 4,975
FAI 72 WB
FairOver: S FK MAUVAISE TERRE
1.6MI SW I72/OLD36, Morgan, IL
Built 1975 Load: 42.8 t ADT: 4,975
IL 121 (FAP 320)
FairOver: KASKASKIA RIVER
N OF ALLENVILLE, Moultrie, IL
Built 1967 Load: 42.8 t ADT: 4,250
FAS 642(CH 4)
FairOver: WHITLEY CREEK
1.0 MI E OF ILL 32, Moultrie, IL
Built 1967 Load: 42.8 t ADT: 2,000
ILL 2 & 72
FairOver: MILL CREEK
AT WEST EDGE BYRON, Ogle, IL
Built 1924 Load: 42.8 t ADT: 7,100
ILL 29 SPUR
FairOver: ILL 6 & RAMP
0.4 MI W OF MOSSVILL, Peoria, IL
Built 1983 Load: 42.8 t ADT: 5,400
STATE STREET
FairOver: DICKISON RUN CR
NE1/4-27-T10NR8E, Peoria, IL
Built 1986 Load: 42.8 t ADT: 2,450
FAI 80 SB
FairOver: BN RAIL ROAD
1.1 MI S ILL 5 & 92, Rock Island, IL
Built 2014 Load: 42.8 t ADT: 11,250
FAI 80 NB
FairOver: BN RAIL ROAD
1.1 MI S ILL 5 & 92, Rock Island, IL
Built 2016 Load: 42.8 t ADT: 11,250
IL 97
FairOver: PRAIRIE CREEK
0.45 mi E IL 125, Sangamon, IL
Built 1941 Load: 42.8 t ADT: 8,500
BLACK RD
FairOver: STREAM
1 MI E OF FENTON, Whiteside, IL
Built 1920 Load: 42.8 t ADT: 725
RICHTON RD
FairOver: DEER CREEK
2 MI W RTE 394, Will, IL
Built 1932 Load: 42.8 t ADT: 1,850
ALPINE RD
FairOver: CN RAILROAD
0.5 MI S HARRISON AV, Winnebago, IL
Built 1963 Load: 42.8 t ADT: 21,200
SCHOOL ST
FairOver: KENT CREEK
0.2 MI W OF KILBURN, Winnebago, IL
Built 1969 Load: 42.8 t ADT: 6,200
MILLER RD
FairOver: LITTLE ROCK CREEK
1200N 1205E, DeKalb, IL
Built 1961 Load: 42.9 t ADT: 25
TR 22
FairOver: TRIB TO MILLER CREEK
1.5 MI NE OF THEBES, Alexander, IL
Built 1983 Load: 43.1 t ADT: 75
FAS 1745 CH. 9
FairOver: SHOAL CR.
0.50 MI W PANAMA IL., Bond, IL
Built 1976 Load: 43.1 t ADT: 375
TR 75
FairOver: TRIB. TO E.FRK SHOAL
4MI N. OF GRVLLE CRK, Bond, IL
Built 1997 Load: 43.1 t ADT: 75
I-80 EB
FairOver: BUREAU CREEK
2 MI. W. OF IL 26, Bureau, IL
Built 1988 Load: 43.1 t ADT: 9,500
I-80 WB
FairOver: BUREAU CREEK
2 MI. W. OF IL 26, Bureau, IL
Built 1988 Load: 43.1 t ADT: 9,500
IL 84
FairOver: BNSF RR
.3 MI S IL64 SAVANNA, Carroll, IL
Built 1988 Load: 43.1 t ADT: 5,550
CH 12(FAS 516)
FairOver: SALT FORK RIVER
1 MI N ST JOSEPH, Champaign, IL
Built 1971 Load: 43.1 t ADT: 1,950
22ND ST (CERMAK RD
FairOver: SALT CREEK
1.7 M E OF IL 83, DuPage, IL
Built 1932 Load: 43.1 t ADT: 9,950
KRESS RD
FairOver: UP RAILROAD CO
0.3 MI N OF IL 38, DuPage, IL
Built 1992 Load: 43.1 t ADT: 5,900
FAP-777 (US-40)
FairOver: VANDALIA RR
.75 MI W US-51, Fayette, IL
Built 1946 Load: 43.1 t ADT: 6,850
TR 163
FairOver: SHORT CREEK
3.5 MI NE CARTHAGE, Hancock, IL
Built 1985 Load: 43.1 t ADT: 250
ILL 164
FairOver: HENDERSON CREEK
1.5 MI E OF OQUAWKA, Henderson, IL
Built 1980 Load: 43.1 t ADT: 1,500
ILL 164
FairOver: S HENDERSON CREEK
.7 MI N OF GLADSTONE, Henderson, IL
Built 1994 Load: 43.1 t ADT: 2,050
FAP-821 (ILL-15)
FairOver: RAYSE CREEK
3.2 MI E WASH CO LN, Jefferson, IL
Built 1996 Load: 43.1 t ADT: 2,750
ILL 100
FairOver: CHATAQUA CREEK
AT CHATAQUA, Jersey, IL
Built 1964 Load: 43.1 t ADT: 3,150
ILL RT 78
FairOver: HAMMOND BR PLUM RIV.
4.3 MI S OF US 20, Jo Daviess, IL
Built 1982 Load: 43.1 t ADT: 700
KESLINGER ROAD
FairOver: TRIBUTARY TO MILL CR
500' W OF BUNKER RD, Kane, IL
Built 2013 Load: 43.1 t ADT: 7,100
IL 25
FairOver: POPLAR CREEK
0.4 M S OF US 20, Kane, IL
Built 1989 Load: 43.1 t ADT: 15,900
EB I-74
FairOver: BNSF RR (004648T)
N.GALESBURG INTERCH, Knox, IL
Built 1963 Load: 43.1 t ADT: 8,850
TR 324
FairOver: CREEK
E 1951ST N 3290, LaSalle, IL
Built 1930 Load: 43.1 t ADT: 50
IL 2
FairOver: ROCK RIVER
AT GRAND DETOUR, Lee, IL
Built 1994 Load: 43.1 t ADT: 4,850
IL 2
FairOver: DITCH
3 MI. W. OF DIXON, Lee, IL
Built 2003 Load: 43.1 t ADT: 11,500
DUNHAM ROAD
FairOver: RUSH CREEK
1.3 MI W IL RTE 23, McHenry, IL
Built 2012 Load: 43.1 t ADT: 275
ILL 9
FairOver: MONEY CREEK
10.15 E OF BISN 55, McLean, IL
Built 1925 Load: 43.1 t ADT: 2,400
FAS 351 CH 1
FairOver: HENLINE DITCH
1.5 MI S CROPSEY, McLean, IL
Built 1990 Load: 43.1 t ADT: 250
FAS 1574
FairOver: CABINESS CR
2.0 MI W GREENVIEW, Menard, IL
Built 2006 Load: 43.1 t ADT: 225
IL 16 (SCHOOL ST.)
FairOver: MIDDLE FORK CREEK
.3M E IL 127 (MAIN), Montgomery, IL
Built 1989 Load: 43.1 t ADT: 5,350
TR 429
FairOver: E BRANCH LAKE FORK
2.0 MI SE WALSHVILLE, Montgomery, IL
Built 1988 Load: 43.1 t ADT: 25
Showing 12,551-12,600 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.