US Bridges

I-15 SB (SR-15) over Union Pacific Railroad

Fair

Weber County, Utah · 0.5 Mi.No.Of 24th St.Int. · Structure no. 3F 737

Built
2008
17 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
81 ft
1 main span
Daily traffic
98,877
2023 count
Owner
State
State Highway Agency

About this bridge

I-15 SB (SR-15) over Union Pacific Railroad is a prestressed concrete continuous stringer/multi-beam or girder carrying I-15 SB (SR-15) over Union Pacific Railroad 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 98,877 vehicles a day, roughly 34% of them trucks, projected to reach 118,652 by 2043. The structure is 81 ft (24.6 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-15 SB (SR-15)
CrossesUnion Pacific Railroad
Location0.5 Mi.No.Of 24th St.Int.
RouteInterstate 15
CountyWeber County
StateUtah
Coordinates41.22222, -112.01
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.
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 rating35.7 US tons
Inventory rating35.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length81 ft (24.6 m)
Longest span78 ft (23.7 m)
Deck width77 ft (23.5 m)
Roadway width74 ft (22.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic98,877 (2023)
Projected traffic118,652 by 2043
Trucks34%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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-15 SB (SR-15) over Union Pacific Railroad built?

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

What condition is I-15 SB (SR-15) over Union Pacific Railroad 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-15 SB (SR-15) over Union Pacific Railroad carry?

About 98,877 vehicles per day (2023 count), of which roughly 34% are trucks.

How long is I-15 SB (SR-15) over Union Pacific Railroad?

The structure is 81 ft (24.6 m) long with a longest span of 78 ft (23.7 m) and a deck 77 ft wide.

Who owns I-15 SB (SR-15) over Union Pacific Railroad?

It is owned by the State Highway Agency.