US Bridges

I-15 (SR-15) Sbl over County Rd. Intchg.X-Road

Fair

Box Elder County, Utah · Garland Interchange · Structure no. 3F 516

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

About this bridge

I-15 (SR-15) Sbl over County Rd. Intchg.X-Road is a prestressed concrete continuous stringer/multi-beam or girder carrying I-15 (SR-15) Sbl over County Rd. Intchg.X-Road 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 fair condition with a lowest component rating of 6 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 695 vehicles a day, roughly 45% of them trucks, projected to reach 834 by 2043. The structure is 222 ft (67.6 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-15 (SR-15) Sbl
CrossesCounty Rd. Intchg.X-Road
LocationGarland Interchange
RouteInterstate 15
CountyBox Elder County
StateUtah
Coordinates41.72611, -112.19306
Functional classUrban 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.3 US tons
Inventory rating50.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length222 ft (67.6 m)
Longest span120 ft (36.6 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic695 (2023)
Projected traffic834 by 2043
Trucks45%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and waterway
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) Sbl over County Rd. Intchg.X-Road built?

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

What condition is I-15 (SR-15) Sbl over County Rd. Intchg.X-Road 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) Sbl over County Rd. Intchg.X-Road carry?

About 695 vehicles per day (2023 count), of which roughly 45% are trucks.

How long is I-15 (SR-15) Sbl over County Rd. Intchg.X-Road?

The structure is 222 ft (67.6 m) long with a longest span of 120 ft (36.6 m) and a deck 44 ft wide.

Who owns I-15 (SR-15) Sbl over County Rd. Intchg.X-Road?

It is owned by the State Highway Agency.