US Bridges

I-15NB (SR-15) over 450 North FA#3368

Fair

Weber County, Utah · At the Slaterville Intchg · Structure no. 1F 752

Built
2008
17 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
137 ft
1 main span
Daily traffic
69,135
2021 count
Owner
State
State Highway Agency

About this bridge

I-15NB (SR-15) over 450 North FA#3368 is a prestressed concrete stringer/multi-beam or girder carrying I-15NB (SR-15) over 450 North FA#3368 in Weber County, Utah. It was built in 2008, so it is 17 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 69,135 vehicles a day, roughly 33% of them trucks, projected to reach 82,962 by 2041. The structure is 137 ft (41.8 m) long and 65 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-15NB (SR-15)
Crosses450 North FA#3368
LocationAt the Slaterville Intchg
RouteInterstate 15
CountyWeber County
StateUtah
Coordinates41.26806, -112.02611
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 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 rating62.8 US tons
Inventory rating51.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length137 ft (41.8 m)
Longest span134 ft (40.9 m)
Deck width65 ft (19.8 m)
Roadway width62 ft (19 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic69,135 (2021)
Projected traffic82,962 by 2041
Trucks33%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkSTRAHNET connector

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-15NB (SR-15) over 450 North FA#3368 built?

It was built in 2008, making it 17 years old in 2025.

What condition is I-15NB (SR-15) over 450 North FA#3368 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 August 2023.

How much traffic does I-15NB (SR-15) over 450 North FA#3368 carry?

About 69,135 vehicles per day (2021 count), of which roughly 33% are trucks.

How long is I-15NB (SR-15) over 450 North FA#3368?

The structure is 137 ft (41.8 m) long with a longest span of 134 ft (40.9 m) and a deck 65 ft wide.

Who owns I-15NB (SR-15) over 450 North FA#3368?

It is owned by the State Highway Agency.