US Bridges

I-15SB On-Ramp over Union Pacific Railroad

Fair

Weber County, Utah · Just So.Of 12th St. Int. · Structure no. 3F 751

Built
2008
17 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
139 ft
1 main span
Daily traffic
10,733
2017 count
Owner
State
State Highway Agency

About this bridge

I-15SB On-Ramp over Union Pacific Railroad is a prestressed concrete stringer/multi-beam or girder carrying I-15SB On-Ramp 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 10,733 vehicles a day, roughly 34% of them trucks, projected to reach 12,880 by 2037. The structure is 139 ft (42.3 m) long and 43 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesI-15SB On-Ramp
CrossesUnion Pacific Railroad
LocationJust So.Of 12th St. Int.
RouteInterstate 15
CountyWeber County
StateUtah
Coordinates41.24293, -112.01629
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
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 rating60.4 US tons
Inventory rating54.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length139 ft (42.3 m)
Longest span135 ft (41.3 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,733 (2017)
Projected traffic12,880 by 2037
Trucks34%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed5 mi (8 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 On-Ramp over Union Pacific Railroad built?

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

What condition is I-15SB On-Ramp 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-15SB On-Ramp over Union Pacific Railroad carry?

About 10,733 vehicles per day (2017 count), of which roughly 34% are trucks.

How long is I-15SB On-Ramp over Union Pacific Railroad?

The structure is 139 ft (42.3 m) long with a longest span of 135 ft (41.3 m) and a deck 43 ft wide.

Who owns I-15SB On-Ramp over Union Pacific Railroad?

It is owned by the State Highway Agency.