US Bridges

Farnsworth Ave over Bn RR

Fair

Kane County, Illinois · 2 MI S of I-88 · Structure no. 045605200000000

Built
1978
47 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
853 ft
3 main spans
Daily traffic
21,300
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Farnsworth Ave over Bn RR is a steel continuous stringer/multi-beam or girder carrying Farnsworth Ave over Bn RR in Kane County, Illinois. It was built in 1978, so it is 47 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 21,300 vehicles a day, roughly 6% of them trucks, projected to reach 29,280 by 2046. The structure is 853 ft (260.1 m) long and 68 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesFarnsworth Ave
CrossesBn RR
Location2 MI S of I-88
CountyKane County
StateIllinois
Coordinates41.77035, -88.28239
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+8 approach)
Design loadHS 20
Structure length853 ft (260.1 m)
Longest span121 ft (36.9 m)
Deck width68 ft (20.7 m)
Roadway width57 ft (17.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,300 (2023)
Projected traffic29,280 by 2046
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Farnsworth Ave over Bn RR built?

It was built in 1978, making it 47 years old in 2025.

What condition is Farnsworth Ave over Bn RR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does Farnsworth Ave over Bn RR carry?

About 21,300 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Farnsworth Ave over Bn RR?

The structure is 853 ft (260.1 m) long with a longest span of 121 ft (36.9 m) and a deck 68 ft wide.

Who owns Farnsworth Ave over Bn RR?

It is owned by the City or Municipal Highway Agency.