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
ILL 146
FairOver: SUGAR CREEK
1.5 MI E JOHNSON CO, Pope, IL
Built 1929 Load: 44.1 t ADT: 900
IL 101
FairOver: HARRISON CREEK
3.1M E HANCOCK CO., Schuyler, IL
Built 1929 Load: 44.1 t ADT: 400
GREEN MT RD-FAU 91
FairOver: LOOP CREEK
0.20M N OF IL 177, St. Clair, IL
Built 1967 Load: 44.1 t ADT: 15,600
I-64 EB
FairOver: A&SRR
0.67 mi E of IL 111, St. Clair, IL
Built 1968 Load: 44.1 t ADT: 36,600
ILL 78
FairOver: INDIAN CR
.4 MI S OF US 34, Stark, IL
Built 2017 Load: 44.1 t ADT: 2,600
US ROUTE 20 WB
FairOver: BIKE TRAIL
1.75 MI W OF IL 26, Stephenson, IL
Built 2011 Load: 44.1 t ADT: 6,150
NB ILL 116
FairOver: TEN MILE CREEK
N OF ILL 26, Tazewell, IL
Built 2014 Load: 44.1 t ADT: 16,200
ILL 177
FairOver: LITTLE CROOKED CREEK
2.5 MI W of IL 127, Washington, IL
Built 1931 Load: 44.1 t ADT: 1,550
CH-22
FairOver: LICK CREEK
3 MI S BROWNSVILLE, White, IL
Built 1986 Load: 44.1 t ADT: 225
IL 40
FairOver: SKUNK CREEK
6 MI. N. OF STERLING, Whiteside, IL
Built 1994 Load: 44.1 t ADT: 2,600
US 30
FairOver: HICKORY CREEK
2 M E OF US6(COLLINS, Will, IL
Built 1923 Load: 44.1 t ADT: 8,750
US 6
FairOver: RR - Wisconsin Central
0.8 M E OF IL 171, Will, IL
Built 1991 Load: 44.1 t ADT: 11,600
I- 55 NB
FairOver: RR - CSXT
0.8 M S OF I-80, Will, IL
Built 1993 Load: 44.1 t ADT: 32,350
135TH(EB)ST
FairOver: E BR DESPLAINES RVR
0.7 MI E IL 53, Will, IL
Built 1997 Load: 44.1 t ADT: 7,100
BELTLINE RD
FairOver: KISHWAUKEE CK
1.3 MI W OF ILL 251, Winnebago, IL
Built 2010 Load: 44.1 t ADT: 1,650
SWANSON RD
FairOver: MCDONALD CREEK
0.6 MI E RT 251, Winnebago, IL
Built 1977 Load: 44.1 t ADT: 5,000
MERRILL AVE
FairOver: LOVES PARK CREEK
CENTER LOVES PARK, Winnebago, IL
Built 1964 Load: 44.1 t ADT: 275
I 90 EB
FairOver: KISHWAUKEE RIVER
.5 MI N CHERY VALY, Winnebago, IL
Built 2013 Load: 44.1 t ADT: 25,300
FAS 2370(IL 26)
FairOver: BLUE CREEK
S Edge of Spring Bay, Woodford, IL
Built 2010 Load: 44.1 t ADT: 3,500
US 40/FAS 779
FairOver: E Fork SHOAL CREEK
1.9 MI E POCAHONTAS, Bond, IL
Built 1993 Load: 44.4 t ADT: 1,300
IL 89
FairOver: BRANCH OF BRUSH CR.
0.8 MI S ARLINGTON, Bureau, IL
Built 1983 Load: 44.4 t ADT: 1,500
FAP 322(US 51)
FairOver: TRIB TO COAL CREEK
1.5 MI S OF PANA, Christian, IL
Built 1995 Load: 44.4 t ADT: 3,800
IL 49(FAP 832)
FairOver: TR1B TO LAMB BRANCH
.6 MI S OF WESTFIELD, Clark, IL
Built 1985 Load: 44.4 t ADT: 1,650
IL 171 (1ST AVE)
FairOver: DES PLAINES RIVER
0.7 M N IL 64, Cook, IL
Built 1931 Load: 44.4 t ADT: 20,100
TR 71
FairOver: HUTSON CREEK
1 MI S HUTSONVILLE, Crawford, IL
Built 2007 Load: 44.4 t ADT: 20
FAI-70
FairOver: COON CREEK
2 MI E ALTAMONT INT, Effingham, IL
Built 1961 Load: 44.4 t ADT: 23,700
ILL 1
FairOver: HARRIS CREEK
2 MI S GALLATIN CO, Hardin, IL
Built 1935 Load: 44.4 t ADT: 1,100
ILL 54
FairOver: SPRING CREEK
1.12 MI N OF THAWVIL, Iroquois, IL
Built 2004 Load: 44.4 t ADT: 1,000
IL 100 (NB)
FairOver: PIASA CREEK
.7 MI N CLIFTON TERR, Jersey, IL
Built 1997 Load: 44.4 t ADT: 5,150
TR 260
FairOver: LITTLERS CREEK
W CTR-31-T9NR4E, Knox, IL
Built 1966 Load: 44.4 t ADT: 75
I 39 & US 51 SB
FairOver: BNSF RR
0.1 MI S PERRY ROAD, Lee, IL
Built 1984 Load: 44.4 t ADT: 9,550
I-88 WB
FairOver: BEACH CREEK
1 MI SW OGLE CO LN, Lee, IL
Built 1974 Load: 44.4 t ADT: 8,050
ILL 23
FairOver: DRAIN DITCH
10.2 MI N OF OLD 66, Livingston, IL
Built 1996 Load: 44.4 t ADT: 1,850
FAI 155 NB
FairOver: SUGAR CREEK
3M NW I-55/I-155 INT, Logan, IL
Built 1986 Load: 44.4 t ADT: 5,300
FAI 155 SB
FairOver: SUGAR CREEK
3M NW I-55/I-155 INT, Logan, IL
Built 1986 Load: 44.4 t ADT: 5,300
IL 89
FairOver: BNSFRR/Crow Creek
4.74 mi s of IL 17, Marshall, IL
Built 2016 Load: 44.4 t ADT: 2,200
STRAWBERRY ROAD
FairOver: SEVENMILE CREEK
1 MI S US45, Massac, IL
Built 2007 Load: 44.4 t ADT: 175
CH 8
FairOver: E FORK LAMOINE RIVER
1 MI N COLCHESTER, McDonough, IL
Built 1956 Load: 44.4 t ADT: 1,200
I-74
FairOver: CREEK
2 M SE OF FAS1478, McLean, IL
Built 1969 Load: 44.4 t ADT: 21,500
GREGORY STREET
FairOver: SUGAR CR MAIN BRANCH
1.9 MI N 51 & 150, McLean, IL
Built 1970 Load: 44.4 t ADT: 6,350
TR 47
FairOver: CAMP CREEK
SE-16-T15N,R2W, Mercer, IL
Built 1983 Load: 44.4 t ADT: 25
FAS 611
FairOver: CONOVER BRANCH
3 MI E LITERBERRY, Morgan, IL
Built 2005 Load: 44.4 t ADT: 250
US 24
FairOver: SUGAR CR
.3 MI SW FULTON CO L, Peoria, IL
Built 2005 Load: 44.4 t ADT: 1,350
FAS 602 / CH 21
FairOver: S. FORK MCKEE CR
3.0 MI S CHAMBERBURG, Pike, IL
Built 1986 Load: 44.4 t ADT: 225
ILL 145
FairOver: BAY CREEK DITCH
1.4 MI N MASSAC CO, Pope, IL
Built 1982 Load: 44.4 t ADT: 1,750
FAS 861
FairOver: RILEY CREEK
0.5NW FT KAS. ST. PK, Randolph, IL
Built 1893 Load: 44.4 t ADT: 200
OLD IL 13 WEST
FairOver: BANKSTON FORK
3.5 MI W HARRISBURG, Saline, IL
Built 1922 Load: 44.4 t ADT: 550
ILL 34
FairOver: MIDDLE FORK SALINE R
2.5 MI N HARRISBURG, Saline, IL
Built 1914 Load: 44.4 t ADT: 2,900
CH 3
FairOver: CROOKED CREEK
2.1M.W.DONGOLA CL., Union, IL
Built 1972 Load: 44.4 t ADT: 250
IL 1 US 136 (FAP 3
FairOver: N FORK VERMILION RIV
3.5 MI N OF DANVILLE, Vermilion, IL
Built 2004 Load: 44.4 t ADT: 4,100
Showing 12,751-12,800 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.