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-7B
FairOver: TRIM CREEK
3 MI N GRANT PARK, Kankakee, IL
Built 1981 Load: 32.4 t ADT: 75
TR 49A
FairOver: BULL CREEK
2 MI SO SHERBURNVILL, Kankakee, IL
Built 1984 Load: 32.4 t ADT: 100
TR 13
FairOver: PIKE CREEK
2.5 MI NE GRANT PARK, Kankakee, IL
Built 1982 Load: 32.4 t ADT: 250
TR 103
FairOver: BAKER CREEK
.75 MI SW EXLINE, Kankakee, IL
Built 1986 Load: 32.4 t ADT: 225
TR 101A
FairOver: HORSE CR EBR
3.5 MI SW BONFIELD, Kankakee, IL
Built 1982 Load: 32.4 t ADT: 50
TR 119
FairOver: HORSE CR WBR
3.3 MI NW HERSCHER, Kankakee, IL
Built 1982 Load: 32.4 t ADT: 100
TR 166
FairOver: BLACKWALNUT CREEK
4.35 MI NE MANTENO, Kankakee, IL
Built 1982 Load: 32.4 t ADT: 75
TR 75
FairOver: SO BR HORSE CREEK
4 MI NW OF BONFIELD, Kankakee, IL
Built 1982 Load: 32.4 t ADT: 25
TR 125
FairOver: REDDICK RUN
1 MI SE OFREDDICK, Kankakee, IL
Built 1983 Load: 32.4 t ADT: 50
TR 125
FairOver: CRANE CREEK
3.75 MI SE REDDICK, Kankakee, IL
Built 1986 Load: 32.4 t ADT: 50
TR 177
FairOver: HORSE CR WBR
4 MI SW HERSCHER, Kankakee, IL
Built 1982 Load: 32.4 t ADT: 75
TR 142A
FairOver: S BR ROCK CREEK
1.90 S OF CH 9/W.DIV, Kankakee, IL
Built 1987 Load: 32.4 t ADT: 1,600
CH 28
FairOver: GARR CREEK
5 MI NW OF CHEBANSE, Kankakee, IL
Built 1987 Load: 32.4 t ADT: 475
TR 264
FairOver: BULL CREEK
5 M1 E OF GRANT PARK, Kankakee, IL
Built 1986 Load: 32.4 t ADT: 25
TR 7
FairOver: NO. BR. ROCK CREEK
3 MI NW MANTENO, Kankakee, IL
Built 1984 Load: 32.4 t ADT: 25
TR 101A
FairOver: LEHIGH RAYMOND RUN
2.5 MI SW BONFIELD, Kankakee, IL
Built 1984 Load: 32.4 t ADT: 50
TR 173
FairOver: HORSE CREEK
2.5 MI SW HERSCHER, Kankakee, IL
Built 1986 Load: 32.4 t ADT: 50
TR 171
FairOver: CREEK
4.5 MI SO REDDICK, Kankakee, IL
Built 1985 Load: 32.4 t ADT: 25
TR 21
FairOver: CANAVAN SLOUGH
2 MI SW WHITAKER, Kankakee, IL
Built 1982 Load: 32.4 t ADT: 25
TR 124
FairOver: S BR ROCK CREEK
3.5 MI SW MANTENO, Kankakee, IL
Built 1987 Load: 32.4 t ADT: 1,050
TR 11
FairOver: CREEK
5 MI NW OF MANTENO, Kankakee, IL
Built 1985 Load: 32.4 t ADT: 125
CH 18
FairOver: MACON CREEK
2.25 MI SE REDDICK, Kankakee, IL
Built 1931 Load: 32.4 t ADT: 650
TR 204
FairOver: TOWER CREEK
4 MI NE ST GEORGE, Kankakee, IL
Built 1984 Load: 32.4 t ADT: 75
TR 125
FairOver: GRANARY CREEK
2 MI S OF UNION HILL, Kankakee, IL
Built 1988 Load: 32.4 t ADT: 50
TR 125
FairOver: REDDICK RUN
1 MI. S OF REDDICK, Kankakee, IL
Built 1987 Load: 32.4 t ADT: 50
TR 244A
FairOver: PIKE CREEK
3 MI NE GRANT PARK, Kankakee, IL
Built 1989 Load: 32.4 t ADT: 75
TR 2A
FairOver: SINGLETON DITCH
6.6 MI E MOMENCE, Kankakee, IL
Built 1991 Load: 32.4 t ADT: 150
CH 37-FAS1322
FairOver: BRANCH OF TRAIL CRK
3.5 M E CHEBANSE, Kankakee, IL
Built 1993 Load: 32.4 t ADT: 1,350
TR 177
FairOver: CREEK
1 M N CABERY, Kankakee, IL
Built 1993 Load: 32.4 t ADT: 50
TR 19A
FairOver: BR ROCK CREEK
8000 N, 4070 W, Kankakee, IL
Built 1995 Load: 32.4 t ADT: 75
TR 7
FairOver: ROCK CREEK
3 MI NW MANTENO, Kankakee, IL
Built 1998 Load: 32.4 t ADT: 100
TR 7A
FairOver: MARSHALL SLOUGH
2 MI NE MANTENO, Kankakee, IL
Built 1999 Load: 32.4 t ADT: 100
CH 44
FairOver: EXLINE SL
4500E 3000N, Kankakee, IL
Built 2006 Load: 32.4 t ADT: 4,050
CH 6
FairOver: HORSE CR
3.3 MI W BONFIELD, Kankakee, IL
Built 2007 Load: 32.4 t ADT: 225
CH 52
FairOver: SINGLETON DITCH
4.5 MI E MOMENCE, Kankakee, IL
Built 2011 Load: 32.4 t ADT: 500
FAU 6181 BROOKMOUN
FairOver: SOLDIER CREEK
0.07 MI E SCHULYER, Kankakee, IL
Built 1976 Load: 32.4 t ADT: 9,000
HELMAR RD
FairOver: AUX SABLE CK
2 MI E OF ILL 47, Kendall, IL
Built 1979 Load: 32.4 t ADT: 75
WHITFIELD RD MS00
FairOver: FOX RIVER
SECT 8 & 9 LINE, Kendall, IL
Built 1984 Load: 32.4 t ADT: 2,450
HENNING RD
FairOver: BIG ROCK CR
.5 M E ROCK CR RD, Kendall, IL
Built 1987 Load: 32.4 t ADT: 25
TR 131 WHITEWILLOW
FairOver: ROODS CREEK
.25 MI W STEPHENS RD, Kendall, IL
Built 1988 Load: 32.4 t ADT: 250
HALE STREET #6680
FairOver: BIG ROCK CREEK
SEC 27, T37N, R6E, Kendall, IL
Built 1990 Load: 32.4 t ADT: 950
Corneils Rd/MS 320
FairOver: ROB ROY CREEK
IN YORKVILLE, Kendall, IL
Built 1999 Load: 32.4 t ADT: 1,050
SCHLAPP RD
FairOver: E.AUX SABLE CR
0.9 MI S.OF IL 126, Kendall, IL
Built 2000 Load: 32.4 t ADT: 1,000
HOPKINS RD TR 94
FairOver: MIDDLE AUX SABLE CR
1.45 MI S OF IL 126, Kendall, IL
Built 2002 Load: 32.4 t ADT: 150
US 150
FairOver: LAKE STOREY
1 MI N OF US 34, Knox, IL
Built 1928 Load: 32.4 t ADT: 3,250
COUNTY HIGHWAY 20
FairOver: SPOON RIVER
W.CTR-35-T10NR3E, Knox, IL
Built 1956 Load: 32.4 t ADT: 50
CO. HWY 27
FairOver: HAW CREEK
CTR-19-T10NR3E, Knox, IL
Built 1976 Load: 32.4 t ADT: 125
TR 31
FairOver: FITCH CREEK
W CTR-23-T13NR4E, Knox, IL
Built 1976 Load: 32.4 t ADT: 10
TR 238A
FairOver: TRIB TO SPOON RIVER
NW-7-T10NR4E, Knox, IL
Built 1977 Load: 32.4 t ADT: 25
TR 171
FairOver: TRIB TO SNAKEDEN CR
NW-9-T11NR4E, Knox, IL
Built 1976 Load: 32.4 t ADT: 50
Showing 8,401-8,450 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.