US Bridges

Wylie Lane over Farmers Union Canal

Fair

Ada County, Idaho · In Boise · Structure no. 000000000025821

Built
1999
26 years old
Condition
Fair
inspected February 2023
Type
Frame
Concrete
Length
20 ft
1 main span
Daily traffic
1,000
2023 count
Owner
County
County Highway Agency

About this bridge

Wylie Lane over Farmers Union Canal is a concrete frame carrying Wylie Lane over Farmers Union Canal in Ada County, Idaho. It was built in 1999, so it is 26 years old, younger than the Idaho 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 6 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 1,000 vehicles a day, roughly 5% of them trucks, projected to reach 1,500 by 2039. The structure is 20 ft (6.1 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesWylie Lane
CrossesFarmers Union Canal
LocationIn Boise
RouteCity Street 0
CountyAda County
StateIdaho
Coordinates43.64758, -116.24656
Functional classUrban Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating77.1 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width80 ft (24.4 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2023)
Projected traffic1,500 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Wylie Lane over Farmers Union Canal built?

It was built in 1999, making it 26 years old in 2025.

What condition is Wylie Lane over Farmers Union Canal 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 February 2023.

How much traffic does Wylie Lane over Farmers Union Canal carry?

About 1,000 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Wylie Lane over Farmers Union Canal?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 80 ft wide.

Who owns Wylie Lane over Farmers Union Canal?

It is owned by the County Highway Agency.