US Bridges

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

Fair

Weber County, Utah · No.Of Wilson Lane Intchg. · Structure no. 3F 744

Built
2008
17 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
142 ft
1 main span
Daily traffic
94,016
2023 count
Owner
State
State Highway Agency

About this bridge

I-15SB (SR-15) over Weber River is a prestressed concrete stringer/multi-beam or girder carrying I-15SB (SR-15) over Weber River 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 94,016 vehicles a day, roughly 34% of them trucks, projected to reach 112,819 by 2043. The structure is 142 ft (43.3 m) long and 77 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-15SB (SR-15)
CrossesWeber River
LocationNo.Of Wilson Lane Intchg.
RouteInterstate 15
CountyWeber County
StateUtah
Coordinates41.23751, -112.01466
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating48.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length142 ft (43.3 m)
Longest span139 ft (42.4 m)
Deck width77 ft (23.4 m)
Roadway width74 ft (22.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic94,016 (2023)
Projected traffic112,819 by 2043
Trucks34%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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-15SB (SR-15) over Weber River built?

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

What condition is I-15SB (SR-15) over Weber 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 August 2023.

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

About 94,016 vehicles per day (2023 count), of which roughly 34% are trucks.

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

The structure is 142 ft (43.3 m) long with a longest span of 139 ft (42.4 m) and a deck 77 ft wide.

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

It is owned by the State Highway Agency.