US Bridges

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

Fair

Juab County, Utah · So.Of South Nephi Intchg. · Structure no. 3F 448

Built
1985
40 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
205 ft
3 main spans
Daily traffic
—
2023 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Sbl over Union Pacific Railroad is a prestressed concrete continuous stringer/multi-beam or girder carrying I-15 (SR-15) Sbl over Union Pacific Railroad in Juab County, Utah. It was built in 1985, so it is 40 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

No traffic count is recorded. The structure is 205 ft (62.5 m) long and 76 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
CrossesUnion Pacific Railroad
LocationSo.Of South Nephi Intchg.
RouteInterstate 15
CountyJuab County
StateUtah
Coordinates39.68037, -111.84167
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.4 US tons
Inventory rating55 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length205 ft (62.5 m)
Longest span89 ft (27.2 m)
Deck width76 ft (23.2 m)
Roadway width72 ft (22 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic—
Projected traffic—
Trucks32%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 Union Pacific Railroad built?

It was built in 1985, making it 40 years old in 2025.

What condition is I-15 (SR-15) Sbl 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 March 2023.

How much traffic does I-15 (SR-15) Sbl over Union Pacific Railroad carry?

No traffic count is recorded for this structure.

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

The structure is 205 ft (62.5 m) long with a longest span of 89 ft (27.2 m) and a deck 76 ft wide.

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

It is owned by the State Highway Agency.