US Bridges

Rp. I84EB to I15NB over I-84 (SR-84)

Good

Box Elder County, Utah · I-15 I-84 Int.@ Tremonton · Structure no. 1F 517

Built
1990
35 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
276 ft
2 main spans
Daily traffic
695
2021 count
Owner
State
State Highway Agency

About this bridge

Rp. I84EB to I15NB over I-84 (SR-84) is a prestressed concrete continuous stringer/multi-beam or girder carrying Rp. I84EB to I15NB over I-84 (SR-84) in Box Elder County, Utah. It was built in 1990, so it is 35 years old, younger than the Utah average of 40.1 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 695 vehicles a day, roughly 35% of them trucks, projected to reach 834 by 2041. The structure is 276 ft (84.2 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesRp. I84EB to I15NB
CrossesI-84 (SR-84)
LocationI-15 I-84 Int.@ Tremonton
RouteInterstate 84
CountyBox Elder County
StateUtah
Coordinates41.70394, -112.19226
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95 US tons
Inventory rating45.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length276 ft (84.2 m)
Longest span136 ft (41.5 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic695 (2021)
Projected traffic834 by 2041
Trucks35%
Lanes on structure1
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Rp. I84EB to I15NB over I-84 (SR-84) built?

It was built in 1990, making it 35 years old in 2025.

What condition is Rp. I84EB to I15NB over I-84 (SR-84) 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 April 2023.

How much traffic does Rp. I84EB to I15NB over I-84 (SR-84) carry?

About 695 vehicles per day (2021 count), of which roughly 35% are trucks.

How long is Rp. I84EB to I15NB over I-84 (SR-84)?

The structure is 276 ft (84.2 m) long with a longest span of 136 ft (41.5 m) and a deck 30 ft wide.

Who owns Rp. I84EB to I15NB over I-84 (SR-84)?

It is owned by the State Highway Agency.