US Bridges

I 15 Nbl & Sbl over Ross Fork Creek

Good

Bingham County, Idaho · 10.4 N. Pocatello · Structure no. 000000000011356

Built
2023
2 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
26 ft
1 main span
Daily traffic
29,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 15 Nbl & Sbl over Ross Fork Creek is a concrete culvert carrying I 15 Nbl & Sbl over Ross Fork Creek in Bingham 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 29,000 vehicles a day, roughly 17% of them trucks, projected to reach 43,500 by 2041. The structure is 26 ft (7.9 m) long and 483 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 15 Nbl & Sbl
CrossesRoss Fork Creek
Location10.4 N. Pocatello
RouteInterstate 15
StateIdaho
Coordinates43.02092, -112.40811
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert9 ExcellentNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.6 US tons
Inventory rating72.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width483 ft (147.2 m)
Roadway width174 ft (53 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,000 (2023)
Projected traffic43,500 by 2041
Trucks17%
Lanes on structure6
Traffic directionTwo-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 15 Nbl & Sbl over Ross Fork Creek built?

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

What condition is I 15 Nbl & Sbl over Ross Fork Creek 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 October 2023.

How much traffic does I 15 Nbl & Sbl over Ross Fork Creek carry?

About 29,000 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is I 15 Nbl & Sbl over Ross Fork Creek?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 483 ft wide.

Who owns I 15 Nbl & Sbl over Ross Fork Creek?

It is owned by the State Highway Agency.