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
CH 16/FAS 1745
FairOver: SHOAL CREEK
4.5 MI E DONNELLSON, Bond, IL
Built 1980 Load: 32.4 t ADT: 100
CH 10/FAS 782
FairOver: WILLOW BRANCH
4.75 S MULBERRY GROV, Bond, IL
Built 1984 Load: 32.4 t ADT: 400
CH 10/FAS 782
FairOver: TRIB HURRICANE CK
1.25 MI S MULB GROVE, Bond, IL
Built 1992 Load: 32.4 t ADT: 525
TR 147
FairOver: BRANCH SHOAL CREEK
2.0 MI W GREENVILLE, Bond, IL
Built 1983 Load: 32.4 t ADT: 50
TR114
FairOver: EAST FK SHOAL CK
3MI SW GREENVILLE, Bond, IL
Built 1989 Load: 32.4 t ADT: 75
TR 5
FairOver: BEAVER CREEK
10 MI S GREENVILLE, Bond, IL
Built 1988 Load: 32.4 t ADT: 375
TR 202
FairOver: KINGSBURY BRANCH
3.50 W MULBERRY GRO, Bond, IL
Built 1980 Load: 32.4 t ADT: 100
TR 202
FairOver: TRIB KINGSBURY RESEV
2.25 MI N.SMITHBORO, Bond, IL
Built 1985 Load: 32.4 t ADT: 100
TR 202
FairOver: TRIB TO KINGSBURY CR
3.5 M.W. MULBERRY GR, Bond, IL
Built 1995 Load: 32.4 t ADT: 100
TR 23
FairOver: DRY BRANCH CREEK
6.75 MI N SMITHBORO, Bond, IL
Built 1992 Load: 32.4 t ADT: 50
TR 254/GILHAM RD
FairOver: GILHAM CREEK
5 MI NW MULBERRY GRV, Bond, IL
Built 2003 Load: 32.4 t ADT: 75
TR 125
FairOver: INDIAN CREEK
4.0 MI W GREENVILLE, Bond, IL
Built 1983 Load: 32.4 t ADT: 100
TR 248A
FairOver: AVERY BRANCH
3 M S MULBERRY GROVE, Bond, IL
Built 1977 Load: 32.4 t ADT: 50
TR 248A
FairOver: HURRICANE CREEK
2MI SE MULBERRY GR., Bond, IL
Built 1988 Load: 32.4 t ADT: 100
TR 159
FairOver: STREAM
ROYAL LAKE RESORT, Bond, IL
Built 1995 Load: 32.4 t ADT: 25
TR 235
FairOver: STREAM
3 MI N KEYESPORT, Bond, IL
Built 1981 Load: 32.4 t ADT: 10
TR 199 Hookdale Av
FairOver: Little Beaver Creek
3 Mi E of Dudleyvill, Bond, IL
Built 2012 Load: 32.4 t ADT: 175
IL 76
FairOver: DRAINAGE DITCH
0.8 MI. N.OF BUS 20, Boone, IL
Built 1994 Load: 32.4 t ADT: 10,300
NEWBURG RD
FairOver: KISHWAUKEE RIVER
3.5 MI W OF BELVIDER, Boone, IL
Built 1962 Load: 32.4 t ADT: 8,050
MCCURRY RD
FairOver: N KINNIKINNICK CREEK
5.5 MI NE ROSCOE, Boone, IL
Built 1967 Load: 32.4 t ADT: 150
N BOONE SCHOOL RD
FairOver: BEAVER CREEK
2.5 MI NW CAPRON, Boone, IL
Built 1957 Load: 32.4 t ADT: 200
RUSSELLVILLE ROAD
FairOver: PISCASAW CREEK
1.5 M SE POPLAR GROV, Boone, IL
Built 1980 Load: 32.4 t ADT: 650
CAPRON RD
FairOver: BR PISCASAW CREEK
3.5 MI S CAPRON, Boone, IL
Built 1981 Load: 32.4 t ADT: 150
BEAVERTON ROAD
FairOver: BEAVER CREEK
1.0 M E POPLAR GROVE, Boone, IL
Built 1983 Load: 32.4 t ADT: 375
EPWORTH RD
FairOver: KISHWAUKEERIVER
3.MI E OF BELVIDERE, Boone, IL
Built 1985 Load: 32.4 t ADT: 450
RIVERSIDE ROAD
FairOver: BEAVER CREEK
4.0 MI NW BELVIDERE, Boone, IL
Built 1988 Load: 32.4 t ADT: 2,350
SPRING CREEK RD
FairOver: BEAVER CREEK
4 MI NW OF BELVIDERE, Boone, IL
Built 1993 Load: 32.4 t ADT: 4,300
WHEELER RD
FairOver: CN RR
2 MI N DEKALB CO LN, Boone, IL
Built 1998 Load: 32.4 t ADT: 200
FAS 1582
FairOver: LITTLE MISSOURI
7 M NW MT STERLING, Brown, IL
Built 2008 Load: 32.4 t ADT: 200
CH 6
FairOver: MCKEE CR
2.7 M W MORRELVILLE, Brown, IL
Built 1978 Load: 32.4 t ADT: 75
TR 234
FairOver: MC KEE CREEK
1.5 MI N MORRELVILLE, Brown, IL
Built 1984 Load: 32.4 t ADT: 50
TR 208
FairOver: BR LITTLE CR
2.3 MI S COOPERSTOWN, Brown, IL
Built 1988 Load: 32.4 t ADT: 50
TR 151
FairOver: BRANCH LITTLE CREEK
2MI SW COOPERSTOWN, Brown, IL
Built 1988 Load: 32.4 t ADT: 75
FAS 1588
FairOver: DRY FORK CR
4.5 MI S OF MT STERL, Brown, IL
Built 1981 Load: 32.4 t ADT: 275
TR 132
FairOver: MCKEE CREEK
4.0MI W VERSAILLES, Brown, IL
Built 1994 Load: 32.4 t ADT: 25
TR 88
FairOver: DRY FORK
2.5 SW MT. STERLING, Brown, IL
Built 1994 Load: 32.4 t ADT: 25
TR 21B
FairOver: MISSOURI CREEK
6.0 MI N TIMEWELL, Brown, IL
Built 1981 Load: 32.4 t ADT: 100
TR75
FairOver: WEST LINE CREEK
1.5 MILES WEST RIPLY, Brown, IL
Built 1975 Load: 32.4 t ADT: 25
TR 75
FairOver: HAMILTON CREEK
2.2 MI SW RIPLEY, Brown, IL
Built 1989 Load: 32.4 t ADT: 75
TR 170
FairOver: CAMP CREEK
2.0 N. OF VERSAILLES, Brown, IL
Built 1986 Load: 32.4 t ADT: 50
I-180 SB
FairOver: BRUSH CREEK
0.5 MI S JCT ILL 26, Bureau, IL
Built 1968 Load: 32.4 t ADT: 2,075
I-180 NB
FairOver: BRUSH CREEK
0.5 MI S JCT ILL26, Bureau, IL
Built 1968 Load: 32.4 t ADT: 2,075
CH 23
FairOver: JAMES RUN CREEK
3 MI. E. OF TISKILWA, Bureau, IL
Built 1996 Load: 32.4 t ADT: 350
CH 23
FairOver: SAUER RUN CREEK
4 MI. E. OF TISKILWA, Bureau, IL
Built 1996 Load: 32.4 t ADT: 350
CH-33
FairOver: EAST BUREAU CREEK
2 MI.NE MALDEN, Bureau, IL
Built 2001 Load: 32.4 t ADT: 400
FAS 244 / CH 9
FairOver: WEST BUREAU CREEK
4 MI. N. OF WYANET, Bureau, IL
Built 1990 Load: 32.4 t ADT: 825
CH 27
FairOver: BUREAU CREEK
6.5 MI NE PRINCTON, Bureau, IL
Built 1960 Load: 32.4 t ADT: 250
FAS 243
FairOver: UNION SPECIAL DITCH
3.5 MI W NEW BEDFORD, Bureau, IL
Built 2000 Load: 32.4 t ADT: 175
FAS 251
FairOver: SPRING CREEK
1.5 MI. E. OF LADD, Bureau, IL
Built 1997 Load: 32.4 t ADT: 1,850
2650E (FAS1245/CH2
FairOver: BRANCH MASTERS CREEK
1 MI SE. OF VAN ORIN, Bureau, IL
Built 1929 Load: 32.4 t ADT: 225
Showing 7,201-7,250 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.