Total bridges
336
Public highway bridges in Kane County
County profile · official public datasets
Kane County, IL
336 public highway bridges tracked in the FHWA National Bridge Inventory: 48.2% rated Good, 45.5% Fair, 6.3% Poor.
- 336
- Public bridges
- 48.2%
- Good condition
- 6.3%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Kane County pairs a better-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- Top 29%
- lowest Poor share in state
- 6.3%
- Poor-condition share
- 336
- public highway bridges
- 1986
- avg year built
Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.
Kane County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Kane County ranks #30 of 102 Illinois counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.3%). Kane County, Illinois contains 336 public highway bridges. Roughly 48.2% are rated “Good,” 45.5% “Fair,” and 6.3% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.
Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.
Source: FHWA National Bridge Inventory. See methodology for full definitions.
Good condition
48.2%
162 of 336 rated 7-9
Fair condition
45.5%
153 of 336 rated 5-6
Poor condition
6.3%
21 of 336 rated 4 or below
In-state Poor-share rank
#30 of 102
Among Illinois counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 336 NBI-tracked bridges by lowest applicable component rating.
Good 48.2% (162)
Fair 45.5% (153)
Poor 6.3% (21)
Kane County's Poor-condition bridges carry 183,925 vehicle crossings a day
That is 4.9% of the county's reported daily bridge traffic on 6.3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 8,758 crossings a day against 11,751 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.
Computed over the 335 of 336 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
36.6% of Kane County's bridges have passed the 50-year mark
123 of the 336 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 48.2% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.
Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.
One structure carries 25.7% of the county's Poor-condition bridge traffic
US 20 BY PASS over FOX RIVER, built 1960, carries 47,200 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 21-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 183,925 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Kane County's bridges were built
336 bridges with a recorded construction year, grouped by decade
- 1900s 2
1900–1909
2 bridges
- 1910s 2
1910–1919
2 bridges
- 1920s 9
1920–1929
9 bridges
- 1930s 9
1930–1939
9 bridges
- 1940s 9
1940–1949
9 bridges
- 1950s 29
1950–1959
29 bridges
- 1960s 34
1960–1969
34 bridges
- 1970s
1970–1979
51 bridges
- 1980s 31
1980–1989
31 bridges
- 1990s 23
1990–1999
23 bridges
- 2000s
2000–2009
41 bridges
- 2010s
2010–2019
86 bridges
- 2020s 10
2020–2029
10 bridges
What this shows Construction peaked in the 2010s, when 86 of the county's bridges still in the inventory were built, which is 25.6% of those with a recorded year. That cohort is now 5 to 14 years old in the 2024 inventory. Its average build year is 1986, 7 years newer than the Illinois average of 1979.
How Kane County compares with Illinois's closest counties by inventory size
The 5 Illinois counties nearest Kane County in number of bridges, with their condition splits. Its 6.3% Poor share is the 2nd-lowest of these 6. Its average build year of 1986 against a peer-group mean of 1980 is 6 years newer.
Showing the 5 closest of 101 Illinois counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| DuPage County | 344 | 37.5% | 54.4% | 8.1% | 1985 |
| Kankakee County | 344 | 40.1% | 53.5% | 6.4% | 1982 |
| Stephenson County | 342 | 61.1% | 36.3% | 2.6% | 1977 |
| Kane County (this page) | 336 | 48.2% | 45.5% | 6.3% | 1986 |
| Shelby County | 335 | 56.4% | 36.4% | 7.2% | 1978 |
| Pike County | 330 | 23.9% | 66.1% | 10% | 1979 |
Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Kane County's. Source: FHWA National Bridge Inventory, 2024 release.
Nationwide counties with similar inventory size or average build year
Two NBI-derived peer sets for Kane County, both outside Illinois so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside IL (336 bridges here).
- Jefferson County, AR · 336 bridges
- Tuscarawas County, OH · 336 bridges
- Warren County, OH · 336 bridges
- Charleston County, SC · 336 bridges
Similar average build year
Nearest mean year-built outside IL (1986 here).
- El Paso County, TX · avg 1986 · 783 bridges
- Caddo County, LA · avg 1986 · 682 bridges
- Weld County, CO · avg 1986 · 614 bridges
- Polk County, IA · avg 1986 · 545 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (153)
DENSMORE ROAD
FairOver: BLACKBERRY CREEK
2.5 MI E SUGAR GROVE, Kane, IL
Built 1961 Load: 13.6 t ADT: 1,000
PEPLOW ROAD
FairOver: VIRGIL DR DITCH NO.3
0.5 MI W VIRGIL, Kane, IL
Built 1929 Load: 17.8 t ADT: 600
WINTERS ROAD
FairOver: VIRGIL DR DITCH NO.3
1 M W MEREDITH RD, Kane, IL
Built 1947 Load: 18.1 t ADT: 375
WELTER ROAD
FairOver: VIRGIL DR DITCH NO.2
1.0 MI S VIRGIL, Kane, IL
Built 1949 Load: 18.8 t
RAMM ROAD
FairOver: VIRGIL DR DITCH NO.3
1.5 MI N VIRGIL, Kane, IL
Built 1949 Load: 19.1 t ADT: 1,600
IL 56 WB
FairOver: I-88 E-W TOLL RD.
3.5 MI W OF IL 31, Kane, IL
Built 1972 Load: 19.4 t ADT: 14,800
TR-8 (W Cnty Ln Rd
FairOver: Big Rock Creek
3.0 MI NW BIG ROCK, Kane, IL
Built 1957 Load: 20.7 t ADT: 75
TR-173 (Scott Road
FairOver: Big Rock Creek
2.0 MI NW BIG ROCK, Kane, IL
Built 1960 Load: 20.7 t ADT: 175
SMITH ROAD
FairOver: BLACKBERRY CREEK
2.0 MI S ELBURN, Kane, IL
Built 1964 Load: 21.1 t ADT: 275
FLETCHER DRIVE
FairOver: TYLER CREEK
0.03 MI E RANDALL RD, Kane, IL
Built 1958 Load: 21.4 t ADT: 500
IL 56
FairOver: FOX RIVER
0.1 MI E OF IL 31, Kane, IL
Built 1931 Load: 21.7 t ADT: 11,900
HANKES ROAD
FairOver: LAKE RUN CREEK
2.0 MI E SUGAR GROVE, Kane, IL
Built 1967 Load: 22.0 t ADT: 3,650
TANNER ROAD
FairOver: LAKE RUN CREEK
0.27 M E of Norris, Kane, IL
Built 2014 Load: 23.7 t ADT: 2,200
GALENA BLVD
FairOver: FOX RIVER W CHANNEL
STOLP ISLAND, Kane, IL
Built 1926 Load: 24.3 t ADT: 11,200
GALENA BLVD
FairOver: FOX RIVER E CHANNEL
STOLP ISLAND, Kane, IL
Built 1910 Load: 24.3 t ADT: 11,200
W. COUNTY LINE RD
FairOver: YOUNGS CREEK
3.5 MI S MAPLE PARK, Kane, IL
Built 1931 Load: 24.3 t ADT: 2,500
BENTON STREET
FairOver: FOX RIVER E. BRANCH
300 FT W ILL RTE 25, Kane, IL
Built 1924 Load: 24.3 t ADT: 2,950
BENTON STREET
FairOver: FOX RIVER W. BRANCH
1200 FT W ILL RTE 25, Kane, IL
Built 1924 Load: 24.3 t ADT: 2,950
NORTH AV
FairOver: FOX RIVER
900 FT W ILL RTE 25, Kane, IL
Built 1926 Load: 24.3 t ADT: 6,650
JERICHO RD
FairOver: BIG ROCK CREEK
4.0 MI SW SUGARGROVE, Kane, IL
Built 1934 Load: 24.6 t ADT: 2,200
TR-179 (KeDeKa Rd)
FairOver: Blackberry Creek
2 MI N SUGAR GROVE, Kane, IL
Built 1968 Load: 24.6 t ADT: 400
ILLINOIS STREET
FairOver: FOX RIVER
0.2 MI S ILL 64, Kane, IL
Built 1958 Load: 24.9 t ADT: 4,350
CHICAGO ST
FairOver: FOX RIVER
0.06 MI E. OF IL-31, Kane, IL
Built 1939 Load: 25.3 t ADT: 12,400
IL 47
FairOver: I- 88 EW TOLL-IL 110 CKC
5 M N OF IL 56, Kane, IL
Built 1972 Load: 25.3 t ADT: 9,300
STEVENS ROAD
FairOver: STONEY CREEK
1.0MI N MACDONALD RD, Kane, IL
Built 1969 Load: 25.3 t ADT: 3,650
LENSCHOW ROAD
FairOver: BURLINGTON CREEK
0.3 M E of French Rd, Kane, IL
Built 1964 Load: 25.6 t ADT: 325
NATIONAL STREET
FairOver: FOX RIVER
0.7 MI. N US-20, Kane, IL
Built 1949 Load: 25.6 t ADT: 6,900
BRUNDIGE ROAD
FairOver: MILL CREEK
1.0 MI E LAFOX, Kane, IL
Built 1960 Load: 25.9 t ADT: 225
MEREDITH ROAD
FairOver: UNNAMED DRAINAGE DITCH
0.9 MI S OF IL 38, Kane, IL
Built 1983 Load: 25.9 t ADT: 1,950
MARSHALL BLVD
FairOver: INDIAN CREEK
.1 MI W FARNSWORTH, Kane, IL
Built 1950 Load: 25.9 t ADT: 650
GRANART ROAD
FairOver: WELCH CREEK
2 MI E BIG ROCK, Kane, IL
Built 1959 Load: 26.2 t ADT: 5,300
I-88 EW TOLLWAY EB
FairOver: BLACKBERRY CR
.5 MI. W OF ILL 47, Kane, IL
Built 1972 Load: 26.2 t ADT: 15,850
I-88 EW TOLLWAY WB
FairOver: BLACKBERRY CR
.5 MI. W OF ILL 47, Kane, IL
Built 1972 Load: 26.2 t ADT: 15,850
SCOTT ROAD
FairOver: BLACKBERRY CREEK
2.0 MI N SUGAR GROVE, Kane, IL
Built 1967 Load: 27.2 t ADT: 1,000
I-88 EB
FairOver: FOX R - RR - IL 25
0.1MI E OF IL 31, Kane, IL
Built 2008 Load: 27.2 t ADT: 82,700
SEAVEY ROAD
FairOver: BLACKBERRY CREEK
0.4 MI W ILL 47, Kane, IL
Built 1961 Load: 28.5 t ADT: 100
HIGHLAND AVE
FairOver: FOX RIVER
0.06M.E.OF IL-31, Kane, IL
Built 1940 Load: 29.2 t ADT: 4,300
MAIN ST.
FairOver: I-88_REAGAN_MEM_TOLL
1.1 MI. W ILL-47, Kane, IL
Built 1972 Load: 29.2 t ADT: 2,750
MAIN STREET
FairOver: WELCH CREEK
0.5 MI W KANEVILLE, Kane, IL
Built 1931 Load: 29.2 t ADT: 1,050
I-88 WB
FairOver: FOX R - RR - IL 25
W OF ILL 31, Kane, IL
Built 1958 Load: 29.5 t ADT: 82,700
W CO LINE RD
FairOver: W BR BIG ROCK CREEK
0.4 MI N RT 30, Kane, IL
Built 1957 Load: 29.8 t ADT: 75
FABYAN PARKWAY
FairOver: BRANCH OF MILL CREEK
.4 MI E OF RANDALL R, Kane, IL
Built 1974 Load: 29.8 t ADT: 25,900
RANDALL ROAD
FairOver: FERSON CREEK
0.2 MI S of Crane Rd, Kane, IL
Built 1955 Load: 30.1 t ADT: 29,500
MEREDITH ROAD
FairOver: UNION DRAI.DITCH #3
1.4 MI S. ILL 64, Kane, IL
Built 1992 Load: 30.5 t ADT: 900
KESLINGER ROAD
FairOver: BLACKBERRY CREEK
1.8M E OF IL47, Kane, IL
Built 2004 Load: 30.5 t ADT: 7,100
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
IL 56
FairOver: INDIAN CREEK
1.8 M E OF IL 25, Kane, IL
Built 1941 Load: 31.4 t ADT: 17,900
MOLITOR AVE
FairOver: INDIAN CREEK
.3 MI E FARNSWORTH, Kane, IL
Built 1977 Load: 31.4 t ADT: 6,300
FABYAN PARKWAY
FairOver: FOX RIVER
FABYAN PK W OF IL 25, Kane, IL
Built 1974 Load: 32.1 t ADT: 28,200
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.