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
FAI-70 WB
FairOver: VANDALIA RR
.5 MI E ILL-185, Fayette, IL
Built 1964 Load: 31.8 t ADT: 11,300
TR-32
FairOver: LICK CREEK
NE MULBERRY GROVE, Fayette, IL
Built 1909 Load: 31.8 t ADT: 75
TR 12A DRUMMER
FairOver: STREAM
230N 300E, Ford, IL
Built 1972 Load: 31.8 t ADT: 75
CONNER RD - TR 344
FairOver: BIG CREEK
NE-3-T5NR3E, Fulton, IL
Built 1978 Load: 31.8 t ADT: 50
TR 178
FairOver: PRAIRIE CR
.5 MI N. OF L'ERABLE, Iroquois, IL
Built 1972 Load: 31.8 t ADT: 175
TR 458
FairOver: BEAVER CR
.5 MI N CH 3, Iroquois, IL
Built 1971 Load: 31.8 t ADT: 25
TR 189
FairOver: BR OF SPRING CREEK
1.75MI E JCT45&24, Iroquois, IL
Built 1928 Load: 31.8 t ADT: 325
CH 2
FairOver: TRIB IROQUOIS RIVER
2MI W ILL 1 ON CH 2, Iroquois, IL
Built 1975 Load: 31.8 t ADT: 250
CH 53
FairOver: LITTLE BEAVER CR
1.5 MI E ST.ANNE, Kankakee, IL
Built 1966 Load: 31.8 t ADT: 900
TR 246
FairOver: DRAINAGE DITCH
5 MI SE MOMENCE, Kankakee, IL
Built 1974 Load: 31.8 t ADT: 100
TR 171
FairOver: CALDWELL CREEK
W1/2-11-T11NR4E, Knox, IL
Built 1969 Load: 31.8 t ADT: 100
I-94 SB
FairOver: MILL CREEK
I-94 205 M N ILL-132, Lake, IL
Built 1958 Load: 31.8 t ADT: 39,100
I-94 NB
FairOver: MILL CREEK
I-94 2.5M N ILL 132, Lake, IL
Built 1958 Load: 31.8 t ADT: 39,100
TR-22
FairOver: PIKE CREEK
E 1ST N 4550, LaSalle, IL
Built 1972 Load: 31.8 t ADT: 100
CO HWY 6 FAS 346
FairOver: VERMILION RIVER
5 MI N OF FAIRBURY, Livingston, IL
Built 1936 Load: 31.8 t ADT: 900
TR 262
FairOver: E FORK MAZON RIVER
3250 N, 3100 E, Livingston, IL
Built 1982 Load: 31.8 t ADT: 50
TR 288
FairOver: SALT CREEK
2.0 MI W CHESTNUT, Logan, IL
Built 1975 Load: 31.8 t ADT: 275
SILVER CRK RD/TR 1
FairOver: TR1B TO SILVER CK
1.5MI S LIVINGSTON, Madison, IL
Built 1969 Load: 31.8 t ADT: 100
US 51 (FAP 322)
FairOver: E FORK KASKASKIA OVF
9.6 MI S FAYETTE C L, Marion, IL
Built 1958 Load: 31.8 t ADT: 2,750
FAU-8591 (CH-11
FairOver: RACCOON CREEK
1 MI E CENTRAL CITY, Marion, IL
Built 1987 Load: 31.8 t ADT: 2,450
TR 109
FairOver: CRANE CREEK
1 MI NW EASTON, Mason, IL
Built 1950 Load: 31.8 t ADT: 125
TR 352
FairOver: N FORK CROOKED CREEK
SW-26-T7NR2W, McDonough, IL
Built 1979 Load: 31.8 t ADT: 50
CHAPEL HILL RD
FairOver: FOX RIVER
0.3 MI NW OF BAY RD, McHenry, IL
Built 1938 Load: 31.8 t ADT: 10,150
I-55 & FAS294
FairOver: STREAM
2 MI SW OF CHENOA, McLean, IL
Built 1976 Load: 31.8 t ADT: 25,450
TR 386
FairOver: LITTLE KICKAPOO CR
2.0 MI E DOWNS, McLean, IL
Built 1967 Load: 31.8 t ADT: 75
TR 23A
FairOver: BR OF ROOKS CREEK
3.0 MI SE CHENOA, McLean, IL
Built 1962 Load: 31.8 t ADT: 75
ILL 29
FairOver: DRAINAGE DITCH
2.5 MI N GREENVIEW, Menard, IL
Built 1961 Load: 31.8 t ADT: 2,000
TR 47
FairOver: PIKE CREEK
4 MI NE SWEETWATER, Menard, IL
Built 1993 Load: 31.8 t ADT: 75
FAS 1405-CH 12
FairOver: NORTH POPE CREEK
NW-23-T14NR1W, Mercer, IL
Built 1971 Load: 31.8 t ADT: 100
TR 282
FairOver: CAMP CREEK
SE-10-T15NR1W, Mercer, IL
Built 1977 Load: 31.8 t ADT: 200
TR 190
FairOver: CAMP CREEK
SE-23-T15NR3W, Mercer, IL
Built 1980 Load: 31.8 t ADT: 25
TOWNSHIP ROAD 273
FairOver: BRUSH CREEK
3.5 MI W HILLSBORO, Montgomery, IL
Built 1981 Load: 31.8 t ADT: 50
TR 117 A
FairOver: WILLOW BRANCH
S EDGE ALLERTON PARK, Piatt, IL
Built 1973 Load: 31.8 t ADT: 25
OLD US 51(UNMARKED
FairOver: CACHE RIVER
ULLIN, Pulaski, IL
Built 1920 Load: 31.8 t ADT: 1,900
ILL 29
FairOver: ILL RIVER TRIB
3.17 MI N OF ILL 18, Putnam, IL
Built 1960 Load: 31.8 t ADT: 3,200
TR 155
FairOver: TRIB BRUSHY CR
NEQ SEC 2 T9S R5E, Saline, IL
Built 1977 Load: 31.8 t ADT: 250
FAS613-CH 8
FairOver: BRANCH SPRING CREEK
2.0 W RIDDLE HILL, Sangamon, IL
Built 1985 Load: 31.8 t ADT: 2,250
ILL 161
FairOver: SILVER CREEK
2.2 M E JCT 158, St. Clair, IL
Built 1932 Load: 31.8 t ADT: 4,950
IL 13
FairOver: ICRR
1.5 mi SE of New Athens, St. Clair, IL
Built 1971 Load: 31.8 t ADT: 4,000
IL 159
FairOver: CSXRR
0.25mi N of I-64, St. Clair, IL
Built 1973 Load: 31.8 t ADT: 20,500
FAU 9218
FairOver: PRAIRIE DUPONT CK
.10 MI S ILL 157, St. Clair, IL
Built 1992 Load: 31.8 t ADT: 2,300
ILL 8/116
FairOver: FARM CREEK
MAIN AND CAMP E.PEO., Tazewell, IL
Built 1930 Load: 31.8 t ADT: 24,800
ILL 29
FairOver: LOST CREEK
1.5 MI S OF PEKIN, Tazewell, IL
Built 1976 Load: 31.8 t ADT: 5,700
FAS 926
FairOver: CYPRESS CR. OVERFLOW
1.4 MI.W JOHNSON CO., Union, IL
Built 1978 Load: 31.8 t ADT: 500
IL 9 (FAP 697)
FairOver: CREEK
.5 MI E OF EAST LYNN, Vermilion, IL
Built 1961 Load: 31.8 t ADT: 2,050
FAS 331(CH 10)
FairOver: BLUEGRASS CREEK
0.5 MI N OF POTOMAC, Vermilion, IL
Built 1935 Load: 31.8 t ADT: 350
FAI-64 EB
FairOver: RR(ABANDONED)
.5 MI W US-45 INT, Wayne, IL
Built 1974 Load: 31.8 t ADT: 5,500
104TH AVENUE
FairOver: E. BR. MARLEY CRK
0.05M N. OF 191ST ST, Will, IL
Built 1991 Load: 31.8 t ADT: 1,450
TR 185
FairOver: STREAM
3.4 MI WNW KENNY, De Witt, IL
Built 1971 Load: 31.9 t ADT: 25
BOWMAN INDUSTRIAL
FairOver: BEAVER CREEK
1.0MIE.OFGREENVILLE, Bond, IL
Built 1978 Load: 32.1 t ADT: 375
Showing 7,001-7,050 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.