US Bridges

I 86 Wbl over Uprr;igo Overpass

Fair

Power County, Idaho · 6.0 E. American Falls · Structure no. 000000000010825

Built
1963
62 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
256 ft
3 main spans
Daily traffic
6,500
2023 count
Owner
State
State Highway Agency

About this bridge

I 86 Wbl over Uprr;igo Overpass is a prestressed concrete stringer/multi-beam or girder carrying I 86 Wbl over Uprr;igo Overpass in Power County, Idaho. It was built in 1963, so it is 62 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 6,500 vehicles a day, roughly 19% of them trucks, projected to reach 9,750 by 2042. The structure is 256 ft (78 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 86 Wbl
CrossesUprr;igo Overpass
Location6.0 E. American Falls
RouteInterstate 86
CountyPower County
StateIdaho
Coordinates42.83888, -112.76945
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.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length256 ft (78 m)
Longest span86 ft (26.2 m)
Deck width35 ft (10.6 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,500 (2023)
Projected traffic9,750 by 2042
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.1 million (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 86 Wbl over Uprr;igo Overpass built?

It was built in 1963, making it 62 years old in 2025.

What condition is I 86 Wbl over Uprr;igo Overpass 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 July 2024.

How much traffic does I 86 Wbl over Uprr;igo Overpass carry?

About 6,500 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is I 86 Wbl over Uprr;igo Overpass?

The structure is 256 ft (78 m) long with a longest span of 86 ft (26.2 m) and a deck 35 ft wide.

Who owns I 86 Wbl over Uprr;igo Overpass?

It is owned by the State Highway Agency.