US Bridges

I 86 Wbl over Sunbeam Road Gs

Fair

Power County, Idaho · At American Falls · Structure no. 000000000010770

Built
1959
66 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
108 ft
3 main spans
Daily traffic
4,350
2023 count
Owner
State
State Highway Agency

About this bridge

I 86 Wbl over Sunbeam Road Gs is a concrete stringer/multi-beam or girder carrying I 86 Wbl over Sunbeam Road Gs in Power County, Idaho. It was built in 1959, so it is 66 years old, older 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 4,350 vehicles a day, roughly 19% of them trucks, projected to reach 6,525 by 2042. The structure is 108 ft (32.9 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 86 Wbl
CrossesSunbeam Road Gs
LocationAt American Falls
RouteInterstate 86
CountyPower County
StateIdaho
Coordinates42.77692, -112.84893
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length108 ft (32.9 m)
Longest span36 ft (11 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,350 (2023)
Projected traffic6,525 by 2042
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 86 Wbl over Sunbeam Road Gs built?

It was built in 1959, making it 66 years old in 2025.

What condition is I 86 Wbl over Sunbeam Road Gs 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 Sunbeam Road Gs carry?

About 4,350 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is I 86 Wbl over Sunbeam Road Gs?

The structure is 108 ft (32.9 m) long with a longest span of 36 ft (11 m) and a deck 40 ft wide.

Who owns I 86 Wbl over Sunbeam Road Gs?

It is owned by the State Highway Agency.