US Bridges

Alamosa Lane over Farmers Union Canal

Good

Ada County, Idaho · In Boise;alamosa & State · Structure no. 000000000025811

Built
1996
29 years old
Condition
Good
inspected February 2024
Type
Frame
Concrete
Length
29 ft
1 main span
Daily traffic
500
2023 count
Owner
County
County Highway Agency

About this bridge

Alamosa Lane over Farmers Union Canal is a concrete frame carrying Alamosa Lane over Farmers Union Canal in Ada County, Idaho. It was built in 1996, so it is 29 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 500 vehicles a day, roughly 5% of them trucks, projected to reach 750 by 2039. The structure is 29 ft (8.8 m) long and 60 ft wide.

CarriesAlamosa Lane
CrossesFarmers Union Canal
LocationIn Boise;alamosa & State
RouteCity Street 0
StateIdaho
Coordinates43.64611, -116.24458
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length29 ft (8.8 m)
Longest span29 ft (8.8 m)
Deck width60 ft (18.4 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2023)
Projected traffic750 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
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 Alamosa Lane over Farmers Union Canal built?

It was built in 1996, making it 29 years old in 2025.

What condition is Alamosa Lane over Farmers Union Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

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

About 500 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Alamosa Lane over Farmers Union Canal?

The structure is 29 ft (8.8 m) long with a longest span of 29 ft (8.8 m) and a deck 60 ft wide.

Who owns Alamosa Lane over Farmers Union Canal?

It is owned by the County Highway Agency.