US Bridges

I 15 Nbl over STP7041;CHUBBUCK Road

Good

Bannock County, Idaho · 1.9 E. Chubbuck · Structure no. 000000000021221

Built
2023
2 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
133 ft
1 main span
Daily traffic
11,750
2023 count
Owner
State
State Highway Agency

About this bridge

I 15 Nbl over STP7041;CHUBBUCK Road is a prestressed concrete stringer/multi-beam or girder carrying I 15 Nbl over STP7041;CHUBBUCK Road in Bannock County, Idaho. It was built in 2023, so it is 2 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11,750 vehicles a day, roughly 18% of them trucks, projected to reach 17,625 by 2042. The structure is 133 ft (40.5 m) long and 83 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 15 Nbl
CrossesSTP7041;CHUBBUCK Road
Location1.9 E. Chubbuck
RouteInterstate 15
CountyBannock County
StateIdaho
Coordinates42.92019, -112.44086
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation9: Superior to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating38.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length133 ft (40.5 m)
Longest span131 ft (39.9 m)
Deck width83 ft (25.2 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,750 (2023)
Projected traffic17,625 by 2042
Trucks18%
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 15 Nbl over STP7041;CHUBBUCK Road built?

It was built in 2023, making it 2 years old in 2025.

What condition is I 15 Nbl over STP7041;CHUBBUCK Road 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 December 2023.

How much traffic does I 15 Nbl over STP7041;CHUBBUCK Road carry?

About 11,750 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is I 15 Nbl over STP7041;CHUBBUCK Road?

The structure is 133 ft (40.5 m) long with a longest span of 131 ft (39.9 m) and a deck 83 ft wide.

Who owns I 15 Nbl over STP7041;CHUBBUCK Road?

It is owned by the State Highway Agency.