US Bridges

I-15 (SR-15) SB over Bear River

Fair

Box Elder County, Utah · North of Honeyville · Structure no. 3F 2

Built
1960
65 years old, rebuilt 2015
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
301 ft
5 main spans
Daily traffic
22,425
2014 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) SB over Bear River is a prestressed concrete stringer/multi-beam or girder carrying I-15 (SR-15) SB over Bear River in Box Elder County, Utah. It was built in 1960 and reconstructed in 2015, so it is 65 years old, older than the Utah average of 40.1 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 22,425 vehicles a day, roughly 34% of them trucks, projected to reach 28,032 by 2034. The structure is 301 ft (91.8 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-15 (SR-15) SB
CrossesBear River
LocationNorth of Honeyville
RouteInterstate 15
CountyBox Elder County
StateUtah
Coordinates41.65183, -112.11457
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length301 ft (91.8 m)
Longest span60 ft (18.3 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic22,425 (2014)
Projected traffic28,032 by 2034
Trucks34%
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-15 (SR-15) SB over Bear River built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2015.

What condition is I-15 (SR-15) SB over Bear 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 April 2023.

How much traffic does I-15 (SR-15) SB over Bear River carry?

About 22,425 vehicles per day (2014 count), of which roughly 34% are trucks.

How long is I-15 (SR-15) SB over Bear River?

The structure is 301 ft (91.8 m) long with a longest span of 60 ft (18.3 m) and a deck 35 ft wide.

Who owns I-15 (SR-15) SB over Bear River?

It is owned by the State Highway Agency.