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)

FAS-97 (W CL Road)

Good

Over: Union Dr. Ditch #3

2 MI N. OF IL 38, Kane, IL

Built 2018 Load: 40.8 t ADT: 2,050

I-88 E-W TOLL RD.

Good

Over: CREEK

.8 M W DUPAGE CO., Kane, IL

Built 1958 Load: 40.8 t ADT: 50,100

IL 25

Good

Over: BREWSTER CREEK

4.6 M N OF IL 64, Kane, IL

Built 2002 Load: 41.1 t ADT: 10,700

DUNHAM RD NB

Good

Over: CC&P RR

0.1M S OF STEARNS RD, Kane, IL

Built 2010 Load: 41.5 t ADT: 17,200

DUNHAM RD SB

Good

Over: CC&P RR

.10M S OF STEARNS RD, Kane, IL

Built 2010 Load: 41.5 t ADT: 17,200

SILVER GLEN RD

Good

Over: TRIB. TO OTTER CREEK

1.07 MI W RANDALL RD, Kane, IL

Built 2011 Load: 41.8 t ADT: 6,950

HOPPS ROAD

Good

Over: OTTER CREEK

1 MI W RANDALL ROAD, Kane, IL

Built 2012 Load: 41.8 t ADT: 3,150

LAFOX ROAD

Good

Over: MILL CREEK

0.4 MI N IL RTE 38, Kane, IL

Built 2014 Load: 41.8 t ADT: 8,150

IL 31

Good

Over: I- 88 EW TOLL-IL 110 CKC

I-88; 0.4 M W IL 25, Kane, IL

Built 2008 Load: 42.1 t ADT: 17,800

BLISS RD.

Good

Over: I-88 E-W TOLL RD.

0.25 MI N DENNY RD, Kane, IL

Built 1972 Load: 42.1 t ADT: 6,250

JERICHO ROAD

Good

Over: BLACKBERRY CREEK

3.2 MI E RTE 47, Kane, IL

Built 2015 Load: 42.4 t ADT: 6,650

IL 25 EB STEARNS

Good

Over: E BR BREWSTER CREEK

0.3 M E Gilbert St, Kane, IL

Built 2014 Load: 43.4 t ADT: 5,350

Deerpath Road

Good

Over: I-88

I-88 3.3M W ILL 25, Kane, IL

Built 2021 Load: 43.7 t ADT: 6,150

US 20

Good

Over: EAKIN CREEK

1.2 M S of I-90, Kane, IL

Built 2019 Load: 44.1 t ADT: 4,900

GRANART ROAD (CH 3

Good

Over: BIG ROCK CREEK

1.0 MI S BIG ROCK, Kane, IL

Built 2005 Load: 44.1 t ADT: 6,250

IL 72 (MAIN ST)

Good

Over: FOX RIVER

0.3 M E OF IL 31, Kane, IL

Built 1996 Load: 44.4 t ADT: 29,200

IL 25 & STEARNS W

Good

Over: E BR BREWSTER CREEK

.15 M W of Dunham Rd, Kane, IL

Built 2009 Load: 44.4 t ADT: 5,350

IL 38

Good

Over: RR - UP

0.1 M E OF KAUTZ RD, Kane, IL

Built 2014 Load: 44.7 t ADT: 30,500

IL 31

Good

Over: STERNS RD

3.1 M S OF US 20, Kane, IL

Built 2007 Load: 44.7 t ADT: 6,250

FRENCH ROAD

Good

Over: BURLINGTON CREEK

0.9 MI S ILL 72, Kane, IL

Built 2015 Load: 44.7 t ADT: 1,800

MAIN STREET

Good

Over: BLACKBERRY CREEK

WEST OF IL 47, Kane, IL

Built 2022 Load: 46.0 t ADT: 2,650

IL 72

Good

Over: HAMPSHIRE CREEK TRIB

4 M W OF IL 47, Kane, IL

Built 2022 Load: 46.7 t ADT: 10,600

BURR ROAD

Good

Over: FERSON CREEK

0.6M S of Silver Gle, Kane, IL

Built 2012 Load: 46.7 t ADT: 4,750

BIG TIMBER RD

Good

Over: TYLER & PINGREE CR

.8 M SE OF IL 72, Kane, IL

Built 2012 Load: 47.0 t ADT: 6,300

DENKER ROAD

Good

Over: FERSON CREEK

0.65 MI N Bolcum Rd, Kane, IL

Built 1972 Load: 47.3 t ADT: 1,000

IL 31

Good

Over: FERSON CREEK

1.1 M N OF IL 64, Kane, IL

Built 2016 Load: 47.6 t ADT: 11,700

ORCHARD ROAD

Good

Over: BLACKBERRY CRK OVRFL

0.675 MI N US 30, Kane, IL

Built 2012 Load: 47.6 t ADT: 29,900

IL 47

Good

Over: VIRGIL DITCH #2

2.2 M N OF IL64, Kane, IL

Built 2013 Load: 48.0 t ADT: 6,850

US 20

Good

Over: MCLEAN BLVD

1.3 M W OF IL 31, Kane, IL

Built 2015 Load: 48.3 t ADT: 31,800

RECKINGER ROAD

Good

Over: INDIAN CREEK

.1MI W FARNSWORTH AV, Kane, IL

Built 2011 Load: 48.3 t ADT: 3,200

I-90

Good

Over: UP RR

2 MI W RANDALL, Kane, IL

Built 2014 Load: 48.3 t ADT: 36,800

I-90

Good

Over: UP RR

2 MI W RANDALL RD, Kane, IL

Built 2013 Load: 48.3 t ADT: 36,800

CORRON ROAD

Good

Over: BR OF FERSON CREEK

250 S OF FAIR OAKS, Kane, IL

Built 2012 Load: 48.6 t ADT: 4,150

Garden Crescent Dr

Good

Over: Tyler Creek

0.3 Mi N Wing St., Kane, IL

Built 1977 Load: 48.6 t ADT: 1,900

IL 25

Good

Over: E BR BREWSTER CREEK

0.1 MI N. STEARNS RD, Kane, IL

Built 2009 Load: 50.5 t ADT: 14,900

STEARNS ROAD

Good

Over: MULTIUSE PATH

0.1MI E DUNHAM RD., Kane, IL

Built 2010 Load: 50.5 t ADT: 17,600

IL 47

Good

Over: EAKIN CR

1.4 M S of I-90, Kane, IL

Built 2017 Load: 50.9 t ADT: 16,200

BLISS ROAD

Good

Over: BLACKBERRY CREEK

1.0 MI N SUGAR GROVE, Kane, IL

Built 2017 Load: 51.2 t ADT: 7,100

IL 25

Good

Over: NORTON CREEK

2.2 M N OF IL 64, Kane, IL

Built 1967 Load: 51.5 t ADT: 9,600

STEARNS RD WB

Good

Over: N ARM BREWSTER CRK

0.3 MI W OF IL 25, Kane, IL

Built 2010 Load: 51.8 t ADT: 15,400

RURAL STREET

Good

Over: INDIAN CREEK

0.41 MI E OHIO ST, Kane, IL

Built 2019 Load: 52.2 t ADT: 1,500

DAUBERMAN ROAD

Good

Over: WELCH CREEK

0.5 Mi N. OF US 30, Kane, IL

Built 1975 Load: 52.5 t ADT: 1,050

I-90

Good

Over: SLEEPY HOLLOW RD

.25 MI E RANDALL RD, Kane, IL

Built 2014 Load: 52.8 t ADT: 50,850

I-90

Good

Over: SLEEPY HOLLOW RD

.25 M E RANDALL RD, Kane, IL

Built 2014 Load: 52.8 t ADT: 50,850

US 30

Good

Over: WABAUNSEE CR

0.5 M W US 34, Kane, IL

Built 2015 Load: 53.1 t ADT: 27,600

Mc Donald Road

Good

Over: Otter Creek

0.3 m W of Randall, Kane, IL

Built 2017 Load: 53.5 t ADT: 8,850

I-90

Good

Over: S BR KISHWAUKEE RIV

1 MI E IL 47, Kane, IL

Built 2014 Load: 53.8 t ADT: 73,600

I-90 EB

Good

Over: US 20

4 MI W OF IL 47, Kane, IL

Built 2013 Load: 53.8 t ADT: 28,900

I 90 WB

Good

Over: US 20

4 MI W IL 47, Kane, IL

Built 2014 Load: 53.8 t ADT: 28,900

IL 47

Good

Over: BLACKBERRY CREEK

1.0 M S OF I-88, Kane, IL

Built 1968 Load: 54.4 t ADT: 9,300

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

Related

Browse all → | Rankings →
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.