US Bridges

I 86B Am. Falls Ic over I 86 Eb-Wb; Am. Falls Ic

Good

Power County, Idaho · 1.6 E. American Falls · Structure no. 000000000010926

Built
2011
14 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
260 ft
2 main spans
Daily traffic
4,100
2023 count
Owner
State
State Highway Agency

About this bridge

I 86B Am. Falls Ic over I 86 Eb-Wb; Am. Falls Ic is a prestressed concrete stringer/multi-beam or girder carrying I 86B Am. Falls Ic over I 86 Eb-Wb; Am. Falls Ic in Power County, Idaho. It was built in 2011, so it is 14 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 4,100 vehicles a day, roughly 14% of them trucks, projected to reach 6,150 by 2042. The structure is 260 ft (79.2 m) long and 58 ft wide.

Location

Open in Google Maps
CarriesI 86B Am. Falls Ic
CrossesI 86 Eb-Wb; Am. Falls Ic
Location1.6 E. American Falls
RouteInterstate 86
CountyPower County
StateIdaho
Coordinates42.793, -112.8275
Functional classRural Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length260 ft (79.2 m)
Longest span128 ft (39 m)
Deck width58 ft (17.7 m)
Roadway width55 ft (16.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,100 (2023)
Projected traffic6,150 by 2042
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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 86B Am. Falls Ic over I 86 Eb-Wb; Am. Falls Ic built?

It was built in 2011, making it 14 years old in 2025.

What condition is I 86B Am. Falls Ic over I 86 Eb-Wb; Am. Falls Ic 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 August 2023.

How much traffic does I 86B Am. Falls Ic over I 86 Eb-Wb; Am. Falls Ic carry?

About 4,100 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is I 86B Am. Falls Ic over I 86 Eb-Wb; Am. Falls Ic?

The structure is 260 ft (79.2 m) long with a longest span of 128 ft (39 m) and a deck 58 ft wide.

Who owns I 86B Am. Falls Ic over I 86 Eb-Wb; Am. Falls Ic?

It is owned by the State Highway Agency.