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.

Total bridges

336

Public highway bridges in Kane County

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

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.

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

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.

Bridge inventory size and condition shares for Kane County and the 5 Illinois counties closest to it in inventory size
County Bridges Poor
DuPage County 344 8.1%
Kankakee County 344 6.4%
Stephenson County 342 2.6%
Kane County (this page) 336 6.3%
Shelby County 335 7.2%
Pike County 330 10%

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).

Similar average build year

Nearest mean year-built outside IL (1986 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 336 Good 162 Fair 153 Poor 21

All bridges (336)

TALAMORE BLVD

Good

Over: TRIB KISHWAUKEE RIV

0.1 MI W IL 47, Kane, IL

Built 2005 Load: 32.4 t ADT: 1,200

BOWES ROAD

Good

Over: OTTER CREEK

.75M W OF RANDALL RD, Kane, IL

Built 2008 Load: 32.7 t ADT: 10,200

PERRY ROAD

Good

Over: BIG ROCK CREEK

2.5 MI NW KANEVILLE, Kane, IL

Built 1972 Load: 33.0 t ADT: 1,650

Mitchell Road

Good

Over: I-88_REAGAN_MEM_TOLL

0.8 M E. of Il. 25, Kane, IL

Built 2015 Load: 33.0 t ADT: 8,000

US 30

Good

Over: SUGAR GROVE NORTH BR

1.1M E of Dugan Rd, Kane, IL

Built 2015 Load: 33.7 t ADT: 11,900

NESLER RD

Good

Over: FITCHIE CREEK

0.75 MI NE BOWES RD, Kane, IL

Built 2017 Load: 34.0 t ADT: 6,850

IL 25

Good

Over: PRAIRIE PATH BIKE TR

1.9 M N OF IL 56, Kane, IL

Built 2004 Load: 34.3 t ADT: 6,950

US 30

Good

Over: SUGAR GROVE BR

0.5 M E of Dugan Rd, Kane, IL

Built 2015 Load: 35.0 t ADT: 11,900

Farnsworth Avenue

Good

Over: I-88

1.8 Mi E. of Ill. 25, Kane, IL

Built 2016 Load: 35.0 t ADT: 23,300

ILLINOIS AVE

Good

Over: E BR FOX RIVER

700 FT W ILL RT 25, Kane, IL

Built 1949 Load: 35.3 t ADT: 13,200

I-90 (EB)

Good

Over: Fox River/Duncan Ave

1 Mi. E. Ill. 31, Kane, IL

Built 2015 Load: 35.3 t ADT: 59,750

I-90 (WB)

Good

Over: Fox River/Duncan Ave

1 Mi. E. of IL 31, Kane, IL

Built 2015 Load: 35.3 t ADT: 59,750

I-88

Good

Over: STREAM

7.3 M W IL-47, Kane, IL

Built 1972 Load: 35.6 t ADT: 31,700

WENMOTH RD

Good

Over: MILL CREEK

2.7 MI W BATAVIA, Kane, IL

Built 1977 Load: 35.6 t ADT: 5,050

SILVER GLEN ROAD

Good

Over: OTTER CREEK

0.8 MI W RANDALL RD, Kane, IL

Built 2019 Load: 36.0 t ADT: 9,800

IL 64

Good

Over: VIRGIL DITCH #2

2.8 M W OF IL 47, Kane, IL

Built 1993 Load: 36.3 t ADT: 6,950

I-88

Good

Over: STREAM

.5 MI W. OF ILL 47, Kane, IL

Built 1972 Load: 36.3 t ADT: 31,700

MCKEE STREET

Good

Over: TRIB OF MILL CREEK

0.02 MI E WENMOTH RD, Kane, IL

Built 1976 Load: 36.3 t ADT: 75

Farnsworth Ave.

Good

Over: Indian Creek

1.0 MI S I-88Tollway, Kane, IL

Built 2022 Load: 36.3 t ADT: 23,300

I-88

Good

Over: STREAM

.7 MI E. OF ILL 47, Kane, IL

Built 1972 Load: 36.6 t ADT: 31,700

HINCKLEY ROAD

Good

Over: W BRANCH BIG ROCK CR

0.1 MI E. Jericho Rd, Kane, IL

Built 1975 Load: 36.6 t ADT: 200

LAFOX ROAD

Good

Over: MILL CREEK

LAFOX & CAMPTON HILL, Kane, IL

Built 1977 Load: 36.6 t ADT: 8,150

Brier Hill Road

Good

Over: Interstate 90

I-90 1.4M E of US 20, Kane, IL

Built 2013 Load: 36.6 t ADT: 1,350

RIVERSIDE DRIVE

Good

Over: PARKING GARAGE

E BANK FOX RIVER, Kane, IL

Built 1972 Load: 37.3 t ADT: 625

I-90

Good

Over: STREAM

1.2 M W US-20, Kane, IL

Built 1958 Load: 37.6 t ADT: 57,000

WATSON ROAD

Good

Over: I-88 E-W TOLL RD.

3 MI NW KANEVILLE, Kane, IL

Built 1972 Load: 37.6 t ADT: 375

INDIAN TRAIL ROAD

Good

Over: INDIAN CREEK

.05MI E OF FARNSWRTH, Kane, IL

Built 2005 Load: 37.6 t ADT: 12,800

MILL ST.

Good

Over: FOX RIVER

JUST W. OF ILL 25, Kane, IL

Built 1984 Load: 37.9 t ADT: 6,500

IL 31

Good

Over: JELKES CREEK

1 M N OF I-90, Kane, IL

Built 1992 Load: 37.9 t ADT: 25,600

IL 64

Good

Over: VIRGIL DITCH #3

4.2 M W OF IL 47, Kane, IL

Built 1993 Load: 37.9 t ADT: 6,850

IL 64

Good

Over: DRAINAGE DITCH

0.1 E OF IL 47, Kane, IL

Built 2012 Load: 37.9 t ADT: 4,900

IL 56

Good

Over: FOX RIVER TAILRACE

0.1 M W OF IL 25, Kane, IL

Built 1932 Load: 38.2 t ADT: 11,900

SEAVEY ROAD

Good

Over: LAKE RUN CREEK

.8 MI E OF BLISS RD, Kane, IL

Built 1981 Load: 38.2 t ADT: 725

US 30

Good

Over: W BR BIG ROCK CREEK

.6 E OF DEKALB CO L, Kane, IL

Built 1984 Load: 38.9 t ADT: 5,050

US 30

Good

Over: E BR BIG ROCK CREEK

1.7M E OF KANE-DEK L, Kane, IL

Built 1984 Load: 38.9 t ADT: 5,300

Illinois Avenue

Good

Over: 7th Avenue Creek

0.10 MI S of IL 64, Kane, IL

Built 2021 Load: 38.9 t ADT: 700

Indiana Avenue

Good

Over: 7th Avenue Creek

0.15 MI S of IL 64, Kane, IL

Built 2021 Load: 38.9 t ADT: 1,800

South Avenue (MS40

Good

Over: 7th Avenue Creek

0.25 MI S of IL 64, Kane, IL

Built 2021 Load: 38.9 t ADT: 900

IL 72

Good

Over: TYLER CREEK

2.2 M E of IL 47, Kane, IL

Built 2017 Load: 39.2 t ADT: 12,700

HILL AVE (AURORA)

Good

Over: WAUBANSEE CREEK

0.5 M N OF US 34, Kane, IL

Built 2003 Load: 39.2 t ADT: 17,400

AUSTIN AVENUE

Good

Over: INDIAN CREEK

.3MI S SHEFFER RD, Kane, IL

Built 2012 Load: 39.2 t ADT: 1,150

IL 25

Good

Over: I- 90 ADAMS TOLL

1.5 M E of IL 31, Kane, IL

Built 2015 Load: 39.5 t ADT: 17,300

IL 72

Good

Over: TYLER CREEK

0.11 M E OF IL 47, Kane, IL

Built 2015 Load: 39.5 t ADT: 11,900

COOMBS ROAD

Good

Over: DM&E RR

I N.HIGHLAND RD, Kane, IL

Built 1984 Load: 39.5 t ADT: 5,450

I90 EB ON-OFF RP

Good

Over: I90 (NW TOLL)

1.7 M S MCHENRY CO L, Kane, IL

Built 1958 Load: 39.5 t ADT: 1,700

IL 25

Good

Over: ABANDONED RR - UP

0.1 M N OF IL 64, Kane, IL

Built 1969 Load: 39.9 t ADT: 9,600

Tyrrell Road

Good

Over: I-90 Jane Addams Tol

I90 .9 MI S OF IL72, Kane, IL

Built 2015 Load: 40.2 t ADT: 11,600

IL 31

Good

Over: FERSON CREEK OVERFLO

1.6 M N of IL 64, Kane, IL

Built 2016 Load: 40.8 t ADT: 11,700

US 20 & IL 47

Good

Over: TYLER CREEK

.12M S OF IL72 INTER, Kane, IL

Built 2014 Load: 40.8 t ADT: 21,400

WALKER ROAD

Good

Over: BURLINGTON CREEK

2 MI W HAMPSHIRE, Kane, IL

Built 2015 Load: 40.8 t ADT: 1,150

Read our methodology - how this data is sourced, computed, and verified.

Related

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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.