US Bridges

I 86 Ebl over Portneuf River

Fair

Power County, Idaho · 2.7 W. Chubbuck · Structure no. 000000000010870

Built
1968
57 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
96 ft
3 main spans
Daily traffic
6,750
2023 count
Owner
State
State Highway Agency

About this bridge

I 86 Ebl over Portneuf River is a concrete stringer/multi-beam or girder carrying I 86 Ebl over Portneuf River in Power County, Idaho. It was built in 1968, so it is 57 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 5 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 6,750 vehicles a day, roughly 24% of them trucks, projected to reach 10,125 by 2042. The structure is 96 ft (29.3 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 Ebl
CrossesPortneuf River
Location2.7 W. Chubbuck
RouteInterstate 86
CountyPower County
StateIdaho
Coordinates42.91244, -112.52086
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length96 ft (29.3 m)
Longest span32 ft (9.8 m)
Deck width40 ft (12.3 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,750 (2023)
Projected traffic10,125 by 2042
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 Ebl over Portneuf River built?

It was built in 1968, making it 57 years old in 2025.

What condition is I 86 Ebl over Portneuf River 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 August 2024.

How much traffic does I 86 Ebl over Portneuf River carry?

About 6,750 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is I 86 Ebl over Portneuf River?

The structure is 96 ft (29.3 m) long with a longest span of 32 ft (9.8 m) and a deck 40 ft wide.

Who owns I 86 Ebl over Portneuf River?

It is owned by the State Highway Agency.