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 27
FairOver: BUSH CREEK
3.5 MI NE NEOGA, Cumberland, IL
Built 1980 Load: 32.4 t ADT: 50
TR 82
FairOver: SPRING POINT CREEK
4.5 MI W JEWETT, Cumberland, IL
Built 1979 Load: 32.4 t ADT: 100
TR 31
FairOver: DICKS CREEK
SE CORNER JOHNSTOWN, Cumberland, IL
Built 1982 Load: 32.4 t ADT: 100
TR 187
FairOver: RANGE CREEK
3.0 MI SE GREENUP, Cumberland, IL
Built 1980 Load: 32.4 t ADT: 50
TR 64
FairOver: MULE CREEK
2.5 MI NE ROSLYN, Cumberland, IL
Built 1980 Load: 32.4 t ADT: 75
TR 203
FairOver: SPRING POINT CREEK
2.8 MI NW MONTROSE, Cumberland, IL
Built 1983 Load: 32.4 t ADT: 150
TR 53
FairOver: RANGE CREEK
3.4 MI E UNION CTR, Cumberland, IL
Built 1986 Load: 32.4 t ADT: 50
FAP 71 (IL 10,IL 5
FairOver: COON CREEK
SE EDGE OF CLINTON, De Witt, IL
Built 1994 Load: 32.4 t ADT: 8,100
FAP 71(IL 54)
FairOver: COON CREEK
SE EDGE OF CLINTON, De Witt, IL
Built 1994 Load: 32.4 t ADT: 5,050
CRESTVIEW ST (1010
FairOver: TEN MILE CREEK
CITY OF CLINTON, De Witt, IL
Built 1977 Load: 32.4 t ADT: 75
CH 14 (FAS 1489)
FairOver: IPC DISCHARGE FLUME
1 MI S OF DEWITT, De Witt, IL
Built 1979 Load: 32.4 t ADT: 300
TR 119
FairOver: CLINTON LAKE
1 MI NE OF BIRKBECK, De Witt, IL
Built 1978 Load: 32.4 t ADT: 275
TR 92
FairOver: LONG POINT CREEK
3.0 MI NW WAPELLA, De Witt, IL
Built 1978 Load: 32.4 t ADT: 50
TR 106
FairOver: TEN MILE CREEK
W EDGE CLINTON, De Witt, IL
Built 1979 Load: 32.4 t
TR 12
FairOver: SALT CREEK
2.5 MI NW KENNEY, De Witt, IL
Built 1979 Load: 32.4 t ADT: 75
TR 262
FairOver: SALT CREEK
SW EDGE FARMER CITY, De Witt, IL
Built 1980 Load: 32.4 t ADT: 250
TR 212
FairOver: STREAM
4 MI N OF DEWITT, De Witt, IL
Built 1980 Load: 32.4 t ADT: 75
TR 68
FairOver: STREAM
7 MI SE WAYNESVILLE, De Witt, IL
Built 1980 Load: 32.4 t ADT: 50
TR 233
FairOver: FRIENDS CREEK
3.5 MI SW WELDON, De Witt, IL
Built 1981 Load: 32.4 t ADT: 25
TR 175
FairOver: DRAINAGE DITCH
3 MI SE OF DEWITT, De Witt, IL
Built 1999 Load: 32.4 t ADT: 25
WOODLAWN ST(FAU 73
FairOver: TEN MILE CREEK
CITY OF CLINTON, De Witt, IL
Built 1963 Load: 32.4 t ADT: 125
CHICAGO RD
FairOver: SOMONAUK CREEK
550N 1405E, DeKalb, IL
Built 1946 Load: 32.4 t ADT: 1,550
SUYDAM RD
FairOver: SOMONAUK CREEK
145N 1565E, DeKalb, IL
Built 1955 Load: 32.4 t ADT: 1,950
SOMONAUK ROAD
FairOver: BR LITTLE ROCK CREEK
625N 1550E, DeKalb, IL
Built 1976 Load: 32.4 t ADT: 3,000
SOMONAUK ROAD
FairOver: W. BR. BIG ROCK CRK.
1150N 1510E, DeKalb, IL
Built 1993 Load: 32.4 t ADT: 2,400
GENOA ROAD
FairOver: DEER CREEK
3315N 1170E, DeKalb, IL
Built 1998 Load: 32.4 t ADT: 3,000
SHABBONA ROAD
FairOver: BIG INDIAN CREEK
820N 350E, DeKalb, IL
Built 2000 Load: 32.4 t ADT: 800
MALTA ROAD
FairOver: BR. OF OWENS CREEK
2675N 350E, DeKalb, IL
Built 2001 Load: 32.4 t ADT: 300
CHERRY VALLEY RD
FairOver: KINGSBURY CREEK
3560N 430E, DeKalb, IL
Built 2008 Load: 32.4 t ADT: 2,950
PERRY ROAD
FairOver: S BR KISHWAUKEE RV
1500N 630E, DeKalb, IL
Built 2009 Load: 32.4 t ADT: 1,800
SHABBONA RD
FairOver: BR INDIAN CRK
495N 300E, DeKalb, IL
Built 2009 Load: 32.4 t ADT: 475
SUYDAM RD
FairOver: LITTLE INDIAN CREEK
200N 615E, DeKalb, IL
Built 2007 Load: 32.4 t ADT: 425
PERRY RD
FairOver: YOUNG'S CREEK
1500N 1745E, DeKalb, IL
Built 2010 Load: 32.4 t ADT: 2,150
BASE LINE RD
FairOver: OWEN CREEK
3000N 365E, DeKalb, IL
Built 1966 Load: 32.4 t ADT: 300
COUNTY LINE ROAD
FairOver: BR S BR KISHWAUKEE R
3440N 030E, DeKalb, IL
Built 1980 Load: 32.4 t ADT: 150
PLEASANT HILL ROAD
FairOver: S BR KISHWAUKEE RV
3275N 1100E, DeKalb, IL
Built 1977 Load: 32.4 t ADT: 1,100
BASE LINE RD
FairOver: LEE SLOUGH CREEK
3000N, 885E, DeKalb, IL
Built 1997 Load: 32.4 t ADT: 1,100
COUNTY LINE ROAD
FairOver: BR OF COON CREEK
3550N 1900E, DeKalb, IL
Built 1980 Load: 32.4 t ADT: 500
SCHAFER RD
FairOver: OWENS CREEK
2750N 425E, DeKalb, IL
Built 1970 Load: 32.4 t ADT: 50
W. CLARE ROAD
FairOver: BRANCH OWENS CREEK
2650N 510E, DeKalb, IL
Built 1990 Load: 32.4 t ADT: 25
PEACE RD
FairOver: BR KISHWAUKEE RIVER
2545N 1235E, DeKalb, IL
Built 1995 Load: 32.4 t ADT: 15,000
PEACE RD
FairOver: BR KISHWAUKEE RIVER
2610N , 1265E, DeKalb, IL
Built 1996 Load: 32.4 t ADT: 12,800
PEACE ROAD
FairOver: UNION PACIFIC RR
0.3 M N OF IL RT 38, DeKalb, IL
Built 1985 Load: 32.4 t ADT: 7,600
GURLER RD. (FAS111
FairOver: BR S BR KISHWAUKEE R
1800N 850E, DeKalb, IL
Built 1992 Load: 32.4 t ADT: 450
PLEASANT STREET
FairOver: UNION DRAINAGE DITCH
2060N 1645E, DeKalb, IL
Built 1975 Load: 32.4 t ADT: 500
BETHANY ROAD
FairOver: E BR KISHWAUKEE RV
2280N 1590E, DeKalb, IL
Built 1982 Load: 32.4 t ADT: 425
WATERMAN ROAD
FairOver: BR S BR KISHWAUKEE R
1675N 900E, DeKalb, IL
Built 1979 Load: 32.4 t ADT: 25
HAUMESSER RD
FairOver: S BR KISHWAUKEE RIVE
1165N 350E, DeKalb, IL
Built 1986 Load: 32.4 t ADT: 25
HOWISON RD
FairOver: SOMONAUK CREEK
705N 1200E, DeKalb, IL
Built 1967 Load: 32.4 t ADT: 275
UNIVERSITY ROAD
FairOver: LITTLE INDIAN CREEK
800N 700E, DeKalb, IL
Built 1978 Load: 32.4 t ADT: 75
Showing 7,801-7,850 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.