US Bridges

I 86 Wbl over Dairy Canyon;frontage RD

Fair

Power County, Idaho · 13.2 W. American Falls · Structure no. 000000000010700

Built
1983
42 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
118 ft
1 main span
Daily traffic
4,150
2023 count
Owner
State
State Highway Agency

About this bridge

I 86 Wbl over Dairy Canyon;frontage RD is a prestressed concrete stringer/multi-beam or girder carrying I 86 Wbl over Dairy Canyon;frontage RD in Power County, Idaho. It was built in 1983, so it is 42 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 4,150 vehicles a day, roughly 26% of them trucks, projected to reach 6,225 by 2042. The structure is 118 ft (36 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 86 Wbl
CrossesDairy Canyon;frontage RD
Location13.2 W. American Falls
RouteInterstate 86
CountyPower County
StateIdaho
Coordinates42.64392, -113.03314
Functional classRural Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 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 alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length118 ft (36 m)
Longest span115 ft (35.1 m)
Deck width44 ft (13.3 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,150 (2023)
Projected traffic6,225 by 2042
Trucks26%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 I 86 Wbl over Dairy Canyon;frontage RD built?

It was built in 1983, making it 42 years old in 2025.

What condition is I 86 Wbl over Dairy Canyon;frontage RD 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 2024.

How much traffic does I 86 Wbl over Dairy Canyon;frontage RD carry?

About 4,150 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is I 86 Wbl over Dairy Canyon;frontage RD?

The structure is 118 ft (36 m) long with a longest span of 115 ft (35.1 m) and a deck 44 ft wide.

Who owns I 86 Wbl over Dairy Canyon;frontage RD?

It is owned by the State Highway Agency.