US Bridges

Ross Fork RD over I 15 Nb-Sb; Fort Hall Ic

Good

Bannock County, Idaho · 1.5 SE Fort Hall · Structure no. 000000000022161

Built
2023
2 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
222 ft
1 main span
Daily traffic
2,600
2023 count
Owner
State
State Highway Agency

About this bridge

Ross Fork RD over I 15 Nb-Sb; Fort Hall Ic is a prestressed concrete stringer/multi-beam or girder carrying Ross Fork RD over I 15 Nb-Sb; Fort Hall Ic 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 2,600 vehicles a day, roughly 13% of them trucks, projected to reach 3,900 by 2042. The structure is 222 ft (67.7 m) long and 88 ft wide.

Location

Open in Google Maps
CarriesRoss Fork RD
CrossesI 15 Nb-Sb; Fort Hall Ic
Location1.5 SE Fort Hall
RouteCounty Highway 0
CountyBannock County
StateIdaho
Coordinates43.02231, -112.40864
Functional classRural Major Collector

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 inspectionMay 2024
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 rating49.3 US tons
Inventory rating37.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length222 ft (67.7 m)
Longest span110 ft (33.5 m)
Deck width88 ft (26.9 m)
Roadway width74 ft (22.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,600 (2023)
Projected traffic3,900 by 2042
Trucks13%
Lanes on structure4
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ross Fork RD over I 15 Nb-Sb; Fort Hall Ic built?

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

What condition is Ross Fork RD over I 15 Nb-Sb; Fort Hall 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 May 2024.

How much traffic does Ross Fork RD over I 15 Nb-Sb; Fort Hall Ic carry?

About 2,600 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Ross Fork RD over I 15 Nb-Sb; Fort Hall Ic?

The structure is 222 ft (67.7 m) long with a longest span of 110 ft (33.5 m) and a deck 88 ft wide.

Who owns Ross Fork RD over I 15 Nb-Sb; Fort Hall Ic?

It is owned by the State Highway Agency.