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-1702(FLAT RK R
FairOver: BRUSHY CREEK
0.2 MI W FLAT ROCK, Crawford, IL
Built 1981 Load: 51.5 t ADT: 700
ILL 164
FairOver: SMITH CREEK
2.3 MI E OF OQUAWKA, Henderson, IL
Built 2011 Load: 51.5 t ADT: 1,500
FAP-821 (ILL-15)
FairOver: CASEY FORK
ECL MT VERNON, Jefferson, IL
Built 1957 Load: 51.5 t ADT: 6,300
FAP-821 (ILL-15)
FairOver: SEVEN MILE CREEK
2 MI E MT VERNON, Jefferson, IL
Built 1957 Load: 51.5 t ADT: 4,600
US 20 WB
FairOver: SINSINAWA RIVER
2 MI. W. OF IL 84, Jo Daviess, IL
Built 1993 Load: 51.5 t ADT: 8,650
BOLCUM ROAD
FairOver: FERSON CREEK
0.8 MI W RANDALL RD, Kane, IL
Built 2011 Load: 51.5 t ADT: 4,700
DOWNER PLACE
FairOver: FOX RIVER W. BRANCH
1000 FT W ILL RTE 25, Kane, IL
Built 1924 Load: 51.5 t ADT: 3,550
SHERRILL RD
FairOver: AUX SABLE CREEK
0.5 MI W OF OBRIEN, Kendall, IL
Built 1995 Load: 51.5 t ADT: 450
ILL 8
FairOver: STREAM
4.5 MI E OF ILL 97, Knox, IL
Built 1971 Load: 51.5 t ADT: 900
I-55 SB
FairOver: KICKAPOO CREEK
.5 N IL10 NW LINCOLN, Logan, IL
Built 1973 Load: 51.5 t ADT: 15,150
FAU 8877
FairOver: NORFORK & WESTERN RR
1.8 MI E ILL 111, Madison, IL
Built 1977 Load: 51.5 t ADT: 7,400
ELM ST./ TR 597A
FairOver: MEADOWBROOK CR.
1.5MI. E. BETHALTO, Madison, IL
Built 1973 Load: 51.5 t ADT: 75
US 67
FairOver: DONAHUE CREEK
1.6 MI N OF IL 17, Mercer, IL
Built 1997 Load: 51.5 t ADT: 5,300
EB I-74
FairOver: UP RR (175624A)
.25 MI W OF PEORIA, Peoria, IL
Built 1965 Load: 51.5 t ADT: 16,250
IL 91
FairOver: FARGO RUN
1 MI N OF US 150, Peoria, IL
Built 1995 Load: 51.5 t ADT: 7,950
FAI 74 & 280 WB
FairOver: SHAEFFER CREEK
1 MI W HENRY CO, Rock Island, IL
Built 1959 Load: 51.5 t ADT: 7,500
IL 99
FairOver: SPRING CREEK
2M S IL 101, Schuyler, IL
Built 1988 Load: 51.5 t ADT: 400
TR 211A
FairOver: STREAM
1.0 MI SW TOWER HILL, Shelby, IL
Built 2013 Load: 51.5 t ADT: 10
LAKE DR/ FAU 9185
FairOver: CANAL #1 LEVEE DIST
.11 MI W IL 157, St. Clair, IL
Built 1978 Load: 51.5 t ADT: 3,700
WEST LINCOLNWAY
FairOver: UP RR
1.3 MI N JCT US 30, Whiteside, IL
Built 1929 Load: 51.5 t ADT: 3,850
IL 113
FairOver: TERRY CREEK
6 M E OF IL 53, Will, IL
Built 1927 Load: 51.5 t ADT: 3,000
IL 76
FairOver: BEAVER CREEK
2.5 MI. S. IL 173, Boone, IL
Built 1990 Load: 51.8 t ADT: 8,250
I-294 SB
FairOver: C&NW RR
0.4 M S US 20 P20, Cook, IL
Built 1958 Load: 51.8 t ADT: 75,250
I 57 NB
FairOver: M. FORK BIG MUDDY R
1.5 MI N W FRANKFORT, Franklin, IL
Built 1962 Load: 51.8 t ADT: 18,600
I 57 SB
FairOver: M. FORK BIG MUDDY R
1.5 MI N W FRANKFORT, Franklin, IL
Built 1962 Load: 51.8 t ADT: 18,600
CARMAN RD
FairOver: HONEY CREEK
2.3 MI N OF ILL 96, Henderson, IL
Built 2012 Load: 51.8 t ADT: 2,000
I 24 WB
FairOver: TUNNEL HILL STATE TR
1 MI N OF ILL 146, Johnson, IL
Built 1971 Load: 51.8 t ADT: 10,650
I 24 EB
FairOver: TUNNEL HILL STATE TR
1 MI N OF ILL 146, Johnson, IL
Built 1971 Load: 51.8 t ADT: 10,650
TR 25
FairOver: ROCK CREEK
3 MI SE DESELM, Kankakee, IL
Built 1977 Load: 51.8 t ADT: 150
IL 120
FairOver: FOX RIVER
MCHENRY, McHenry, IL
Built 1985 Load: 51.8 t ADT: 18,100
FAU-168 (Wilmot Rd
FairOver: NIPPERSINK CREEK
0.2 MI. N. U.S. 12, McHenry, IL
Built 1960 Load: 51.8 t ADT: 7,200
TR 223
FairOver: DOUGLAS CREEK
NE-11-T13NR4W, Mercer, IL
Built 1997 Load: 51.8 t ADT: 10
ILL 91
FairOver: MUD RUN CR
5 MI N PRINCEVILLE, Stark, IL
Built 2000 Load: 51.8 t ADT: 1,650
ILL 40
FairOver: COOPERS CREEK
2.25 MI S BRADFORD, Stark, IL
Built 1995 Load: 51.8 t ADT: 1,650
FAP 643-IL 17
FairOver: Indian Creek
0.5 mi w of Toulon, Stark, IL
Built 2018 Load: 51.8 t ADT: 1,250
EB I-74
FairOver: DIVERSION CHANNEL
7/8 MI W OF ILL 116, Tazewell, IL
Built 1959 Load: 51.8 t ADT: 28,500
US 30 SPUR S B
FairOver: ELKHORN CREEK
.32MI S OF MOLINE RD, Whiteside, IL
Built 1972 Load: 51.8 t ADT: 4,100
IL 53
FairOver: HICKORY CREEK
0.1 M S OF I-80, Will, IL
Built 1967 Load: 51.8 t ADT: 25,000
US 40
FairOver: BNSFRR
AT SMITHBORO, Bond, IL
Built 1942 Load: 52.2 t ADT: 1,450
FAP-327 (US-50)
FairOver: NICKELSON CREEK
3 MI E MARION CO LN, Clay, IL
Built 1990 Load: 52.2 t ADT: 2,350
IL 171 SB FIRST AV
FairOver: RR - CN
0.3 M SE I-55, Cook, IL
Built 1963 Load: 52.2 t ADT: 39,600
I-70 (WB)
FairOver: MUDDY CREEK
4.6MI E EFF CO LINE, Cumberland, IL
Built 1968 Load: 52.2 t ADT: 11,550
I-70 (EB)
FairOver: MUDDY CREEK
4.6MI E EFF CO LINE, Cumberland, IL
Built 1968 Load: 52.2 t ADT: 11,550
FAP 323(US 36)
FairOver: EMBARRAS RIVER
W OF CAMARGO, Douglas, IL
Built 1991 Load: 52.2 t ADT: 4,250
FAP-828 (CC-MONT B
FairOver: DIETERICH CREEK
.5 MI S ILL-33, Effingham, IL
Built 1994 Load: 52.2 t ADT: 2,550
FAI 55 NB
FairOver: Union Pacific RR
3.2 MI S OF REED RD, Grundy, IL
Built 1955 Load: 52.2 t ADT: 12,050
FAI 55 SB
FairOver: Union Pacific RR
3.2 MI S OF REED RD, Grundy, IL
Built 1955 Load: 52.2 t ADT: 12,050
MARSEILLES RD,CH 2
FairOver: LONG POINT CREEK
0.37 MI W OF US 6, Grundy, IL
Built 2004 Load: 52.2 t ADT: 2,050
OSCO ROAD
FairOver: CAMP CREEK
1.2 MI N JCT ILL 81, Henry, IL
Built 1932 Load: 52.2 t ADT: 500
US 51
FairOver: LIT CRAB ORCHARD CR
2.0 MI N CARBONDALE, Jackson, IL
Built 1996 Load: 52.2 t ADT: 6,250
Showing 13,401-13,450 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.