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 120
FairOver: HORSE CK
3 NE FARMERSVILLE, Montgomery, IL
Built 1975 Load: 45.7 t ADT: 25
FAI 280 WB
FairOver: IAIS RR
.1 MI E OF US 67, Rock Island, IL
Built 1968 Load: 45.7 t ADT: 9,850
I-88 WB
FairOver: MEREDOSIA DITCH
AT WHITESIDE CO LN, Rock Island, IL
Built 1976 Load: 45.7 t ADT: 6,250
IL 92
FairOver: BIG BRANCH CREEK
1.5 MI N ILL 192, Rock Island, IL
Built 2014 Load: 45.7 t ADT: 525
CH 11(FAS 1629)
FairOver: KASKASKIA RIVER
1.0 MI E COWDEN, Shelby, IL
Built 1968 Load: 45.7 t ADT: 550
IL 91
FairOver: PRINCE RUN TRIB
4 MI N OF PRINCEVILL, Stark, IL
Built 2000 Load: 45.7 t ADT: 1,650
ILL 98
FairOver: LICK CREEK TRIB
E JCT ILL 29&98, Tazewell, IL
Built 1999 Load: 45.7 t ADT: 4,150
FAP-328 (US-45)
FairOver: EW RR
ENFIELD, White, IL
Built 1939 Load: 45.7 t ADT: 2,750
FREEPORT RD
FairOver: SUGAR CREEK
2.7 MI. N. OF IL 2, Whiteside, IL
Built 1999 Load: 45.7 t ADT: 1,800
US 30
FairOver: CATTAIL CREEK
1 MI. E. OF IL 136, Whiteside, IL
Built 1992 Load: 45.7 t ADT: 5,550
I 57 NB
FairOver: CRAB ORCHARD CREEK
2 MI S OLD IL 13, Williamson, IL
Built 2006 Load: 45.7 t ADT: 17,350
I 57 SB
FairOver: CRAB ORCHARD CREEK
2 MI S OLD IL 13, Williamson, IL
Built 2006 Load: 45.7 t ADT: 17,350
US 20 WB
FairOver: GROVE CREEK
0.3 MI E STEPH. CO., Winnebago, IL
Built 1994 Load: 45.7 t ADT: 13,000
ROCKTON RD
FairOver: ROCK RIVER OVERFLOW
.3 MI W OF ROCKTON, Winnebago, IL
Built 1989 Load: 45.7 t ADT: 2,200
US 24
FairOver: WALNUT CREEK
0.5 MI W OF ILL 117, Woodford, IL
Built 1963 Load: 45.7 t ADT: 7,150
ILL 96
FairOver: CURTIS CREEK
2.1 MI S ILL 104/96, Adams, IL
Built 2003 Load: 46.0 t ADT: 10,500
FAI 70 EB
FairOver: Trib to Sugar Creek
0.23 E. OF CO.LN., Bond, IL
Built 1965 Load: 46.0 t ADT: 13,450
IL 29/26
FairOver: BUREAU CR OVERFLOW
0.3 MI N JCT ILL 26, Bureau, IL
Built 1965 Load: 46.0 t ADT: 750
IL 78
FairOver: EAST PLUM RIVER
3 MI. N. MT CARROLL, Carroll, IL
Built 1995 Load: 46.0 t ADT: 625
IL 161
FairOver: KASKASKIA RIVER
4.5M EAST BARTELSO, Clinton, IL
Built 1994 Load: 46.0 t ADT: 2,250
IL 171 SB FIRST AV
FairOver: DES PLAINES RIVER
0.2 M W I-55, Cook, IL
Built 1964 Load: 46.0 t ADT: 40,100
25TH AVE
FairOver: RR - IHB
0.3 M N IL 64, Cook, IL
Built 1965 Load: 46.0 t ADT: 15,900
CLARK ST
FairOver: Parking Area
330 N.& 100 W., Cook, IL
Built 1982 Load: 46.0 t ADT: 6,800
IL 38 N FRNT RD
FairOver: SALT CREEK
0.5 E OF IL 83, DuPage, IL
Built 1930 Load: 46.0 t ADT: 2,650
US 24/IL 100
FairOver: SPOON RIVER
N OF DUNCAN MILLS, Fulton, IL
Built 2006 Load: 46.0 t ADT: 1,900
IL 47 FAP 326
FairOver: W FORK MAZON RIVER
6.1 MI N OF I-55, Grundy, IL
Built 2009 Load: 46.0 t ADT: 4,550
US RT 6
FairOver: GENESEO CREEK
W SIDE OF GENESEO, Henry, IL
Built 1982 Load: 46.0 t ADT: 4,900
US 24
FairOver: RAYMOND CREEK
2.65 MI E OF ILL 1, Iroquois, IL
Built 1957 Load: 46.0 t ADT: 3,500
ILL 146
FairOver: BELL POND CREEK
0.5 MI E GRANTSBURG, Johnson, IL
Built 1931 Load: 46.0 t ADT: 900
MC CORNACK ROAD
FairOver: TYLER CREEK
0.7 MI N BIG TIMBER, Kane, IL
Built 1959 Load: 46.0 t ADT: 475
ILL 115
FairOver: W BR OF HORSE CREEK
.5 MI W OF HERSCHER, Kankakee, IL
Built 1982 Load: 46.0 t ADT: 1,450
ILL 351/FAP619
FairOver: IL RIVER
1.0 MI. S OF US 6, LaSalle, IL
Built 2003 Load: 46.0 t ADT: 5,250
I 39 & US 51 NB
FairOver: BNSF RR
0.1 MI S PERRY ROAD, Lee, IL
Built 1984 Load: 46.0 t ADT: 9,550
US 30
FairOver: HOWLAND CREEK
E. WHITESIDE CO. LN., Lee, IL
Built 1993 Load: 46.0 t ADT: 2,950
FAS 737/SEILER RD.
FairOver: HONEYCUT BRANCH
1.2 MI W FOSTERBURGM, Madison, IL
Built 1977 Load: 46.0 t ADT: 475
FAS 737SEILER RD
FairOver: INDIAN CREEK
1MI E OF DORSEY, Madison, IL
Built 1997 Load: 46.0 t ADT: 1,250
US 45-FAP 889
FairOver: STREAM
0.8 MI W I-24, Massac, IL
Built 1999 Load: 46.0 t ADT: 12,800
FAS 214-CH 13
FairOver: CAMP CREEK
SW-34-T15NR4W, Mercer, IL
Built 1973 Load: 46.0 t ADT: 75
I-55
FairOver: HORSE CREEK
1.2M S SANG CO LINE, Montgomery, IL
Built 1972 Load: 46.0 t ADT: 31,350
ILL 104
FairOver: MAUVAISE TERRE BR
1MI S BUS I72/IL104, Morgan, IL
Built 1933 Load: 46.0 t ADT: 2,000
IL 2
FairOver: MUD CREEK
2.9 MI N JCT ILL 64, Ogle, IL
Built 1940 Load: 46.0 t ADT: 4,200
IL 96
FairOver: AMBROSIA CREEK
1M NW US 54-ATLAS, Pike, IL
Built 1938 Load: 46.0 t ADT: 1,100
US 45-FAP 881
FairOver: GRASSY CREEK
1 MI NE STONEFORT, Saline, IL
Built 2002 Load: 46.0 t ADT: 2,000
US 51 (FAP 322)
FairOver: OPOSSUM CREEK
3 MI S CHRISTIAN LIN, Shelby, IL
Built 1985 Load: 46.0 t ADT: 3,150
FAS 331(CH 10)
FairOver: KNIGHTS BRANCH
1.8 MI S OF POTOMAC, Vermilion, IL
Built 1932 Load: 46.0 t ADT: 450
US 67
FairOver: TOM'S CREEK
0.1 MI W OF ILL 135, Warren, IL
Built 2007 Load: 46.0 t ADT: 2,050
ILL 127
FairOver: CROOKED CREEK
1 MI S JCT 161, Washington, IL
Built 1934 Load: 46.0 t ADT: 2,750
US 52
FairOver: SUGAR RUN CREEK
2.5 M SE OF IL 53, Will, IL
Built 1981 Load: 46.0 t ADT: 12,500
ALPINE RD
FairOver: UNION PACIFIC RR
0.4 MI S HARRISON AV, Winnebago, IL
Built 1963 Load: 46.0 t ADT: 21,200
OLD DELTA RD
FairOver: SEXTON CREEK
0.5 MI N OF CH 4, Alexander, IL
Built 2006 Load: 46.3 t ADT: 25
Showing 12,951-13,000 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.