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 170
FairOver: MUD CREEK
2.3 MI N OF CH 10, Iroquois, IL
Built 1976 Load: 30.8 t ADT: 100
TR 442
FairOver: TRIB TO IROQUOIS RV
2.75 MI S IROQUOIS, Iroquois, IL
Built 1966 Load: 30.8 t ADT: 75
TR 290
FairOver: MAIN MARTINTON DITCH
1.5 E MARTINTON, Iroquois, IL
Built 1962 Load: 30.8 t ADT: 150
ASHLAND AV
FairOver: E BRANCH OF FOX RV
100 FT W ILL RTE 25, Kane, IL
Built 1961 Load: 30.8 t ADT: 6,600
FAP360 FARNSWORTH
FairOver: INDIAN CREEK
.4 MI S E W TOLLWAY, Kane, IL
Built 1970 Load: 30.8 t ADT: 23,300
FAU 6184 CH 42
FairOver: UNNAMED CR
3.5 MI E KANKAKEE, Kankakee, IL
Built 1970 Load: 30.8 t ADT: 350
FOX RIVER DR
FairOver: FOX RIVER
CH15 OVR FOX RIVER, Kendall, IL
Built 1969 Load: 30.8 t ADT: 4,750
TR 561
FairOver: CREEK
N 6TH E 750, LaSalle, IL
Built 1963 Load: 30.8 t ADT: 10
CH 8 STEWARD RD
FairOver: STEWARD CREEK
0.25 MI S PERRY RD, Lee, IL
Built 1959 Load: 30.8 t ADT: 225
CH-15 INDIAN HEAD
FairOver: RED OAK DITCH
0.5 MI N BUREAU CO, Lee, IL
Built 1956 Load: 30.8 t ADT: 300
MAYTOWN RD.-TR 281
FairOver: BR. OF BUREAU CREEK
.2 MI. W. OF US 52, Lee, IL
Built 1990 Load: 30.8 t ADT: 75
TR 4
FairOver: PRAIRIE CREEK
2775 N, 100 E, Livingston, IL
Built 1921 Load: 30.8 t ADT: 50
TR 75
FairOver: MOLE CREEK
435 E, 2400 N, Livingston, IL
Built 1920 Load: 30.8 t ADT: 50
TR 216A
FairOver: DRAINAGE DITCH
2185 N, 2400 E, Livingston, IL
Built 1940 Load: 30.8 t ADT: 25
I-55 NB
FairOver: KICKAPOO CREEK
2.5 M E I-55/155 INT, Logan, IL
Built 1973 Load: 30.8 t ADT: 10,750
I-55 SB
FairOver: KICKAPOO CREEK
2.5 M E I-55/155 INT, Logan, IL
Built 1973 Load: 30.8 t ADT: 10,750
TR 54
FairOver: PRAIRIE CK
2 S 1 MI W EMDEN, Logan, IL
Built 1972 Load: 30.8 t ADT: 50
TR 13 (TH-C55)
FairOver: BRANCH CROW CREEK
T13N-R9E-4PM SEC 12, Marshall, IL
Built 1971 Load: 30.8 t ADT: 100
TR 98
FairOver: SHAW CREEK
T30N-R1W-3PM SEC29, Marshall, IL
Built 1996 Load: 30.8 t ADT: 25
GARDEN VALLEY ROAD
FairOver: N. BR. KISHWAUKEE R.
0.5MI E MILLSTREAMRD, McHenry, IL
Built 1965 Load: 30.8 t ADT: 550
FAI 255 NB/EB
FairOver: UPRR
2 mi E of JB Bridge, Monroe, IL
Built 1984 Load: 30.8 t ADT: 25,850
FAS 613
FairOver: N&W RR
.5 MI E JVILLE, Morgan, IL
Built 1975 Load: 30.8 t ADT: 1,900
EVANS MILL RD-TR 1
FairOver: KICAPOO CREEK
SE1/4 30 T10NR7E, Peoria, IL
Built 1987 Load: 30.8 t ADT: 275
TR 512
FairOver: ILL RIVER TRIBUTARY
1.25 MI N PEARL, Pike, IL
Built 1966 Load: 30.8 t ADT: 50
SBI 147 OFF ILL 37
FairOver: STREAM
IN OLMSTED, Pulaski, IL
Built 1954 Load: 30.8 t ADT: 600
FAS 849
FairOver: LITTLE PLUM CREEK
4 MI SOUTHOF BALDWIN, Randolph, IL
Built 1969 Load: 30.8 t ADT: 725
I-55 (NB)
FairOver: ILLINOIS CENTRAL RR
1M N GLENARM INTCHG, Sangamon, IL
Built 1971 Load: 30.8 t ADT: 17,850
I-72 / US 36 (WB)
FairOver: SANGAMON RIVER
3.5M E I-55, Sangamon, IL
Built 1974 Load: 30.8 t ADT: 7,250
I-72 / US 36 (EB)
FairOver: SANGAMON RIVER
3.5M E I-55, Sangamon, IL
Built 1974 Load: 30.8 t ADT: 7,250
TR 206 KOKE MILL R
FairOver: SPRING CREEK
1.5 SE BRADFORDTON, Sangamon, IL
Built 1968 Load: 30.8 t ADT: 900
ILL 26 (FAP 316)
FairOver: PECATONICA RIVER
0.4 MI N OF US 20BR, Stephenson, IL
Built 1983 Load: 30.8 t ADT: 12,500
TR 165
FairOver: RUNNING LAKE DITCH
0.2 MI W OF ILL 3, Union, IL
Built 1981 Load: 30.8 t ADT: 100
FAP-825 (ILL-15)
FairOver: TRIB COFFEE CREEK
3.5 MI W MT CARMEL, Wabash, IL
Built 1974 Load: 30.8 t ADT: 3,850
CH 19
FairOver: SWAN CREEK
NE-26-T8NR3W, Warren, IL
Built 1961 Load: 30.8 t ADT: 200
ILL 15
FairOver: NASHVILLE CREEK
0.2 MI W NASHVILLE, Washington, IL
Built 1921 Load: 30.8 t ADT: 3,450
FROG POND RD
FairOver: LYNN CREEK
6.5 MI N OF ERIE, Whiteside, IL
Built 1981 Load: 30.8 t ADT: 100
PENROSE ROAD
FairOver: ELK HORN CREEK
6 MI N. STERLING, Whiteside, IL
Built 1961 Load: 30.8 t ADT: 125
I- 55 EAST FRNT RD
FairOver: I & M CANAL
1.1 M S OF I-80, Will, IL
Built 1956 Load: 30.8 t ADT: 1,100
HOUBOLT AVE
FairOver: ROCK RUN CREEK
1/2 MI S US 52, Will, IL
Built 1970 Load: 30.8 t ADT: 11,900
LIDDLE ROAD
FairOver: UNNAMED CREEK
0.3 MI N ROSCOE RD, Winnebago, IL
Built 1971 Load: 30.8 t ADT: 125
TR 0349
FairOver: MILL CREEK
3.2 MI E QUINCY, Adams, IL
Built 1899 Load: 31.1 t ADT: 575
ILL ROUTE 173
FairOver: BEAVER CR TRIBUTARY
1.5 MI W CAPRON, Boone, IL
Built 1974 Load: 31.1 t ADT: 4,550
US 52 & ILL 64
FairOver: STRADDLE CREEK
2.9 MI E OF ILL 73, Carroll, IL
Built 1983 Load: 31.1 t ADT: 2,500
FAP-327 (US-50 EB)
FairOver: ELM RIVER
.2 MI E JCT US-45S, Clay, IL
Built 1965 Load: 31.1 t ADT: 4,950
FAP-327 (US-50 WB)
FairOver: ELM RIVER
.2 MI E JCT US-45S, Clay, IL
Built 1965 Load: 31.1 t ADT: 4,950
TR-212A
FairOver: SEMINARY CREEK
1 MI S FLORA, Clay, IL
Built 1960 Load: 31.1 t ADT: 200
IL 16 (FAP 91)
FairOver: POLE CAT CREEK
1.0 MI E ASHMORE, Coles, IL
Built 1958 Load: 31.1 t ADT: 3,200
87TH ST.
FairOver: B&O,IHB RR
0.6M.W.OF IL-43, Cook, IL
Built 1971 Load: 31.1 t ADT: 19,700
POLK STREET
FairOver: UNION STATION TRACKS
800S 300W TO 500W, Cook, IL
Built 1996 Load: 31.1 t ADT: 2,200
TR-133
FairOver: DOGWOOD CREEK
1.5 MI N OBLONG, Crawford, IL
Built 1981 Load: 31.1 t ADT: 75
Showing 6,851-6,900 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.