US Bridges

I-15 Nb.Off-Ramp over Union Pacific Railroad

Fair

Juab County, Utah · So.Of South Nephi Intchg. · Structure no. 1F 450

Built
1984
41 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
222 ft
3 main spans
Daily traffic
2,470
2021 count
Owner
State
State Highway Agency

About this bridge

I-15 Nb.Off-Ramp over Union Pacific Railroad is a prestressed concrete continuous stringer/multi-beam or girder carrying I-15 Nb.Off-Ramp over Union Pacific Railroad in Juab County, Utah. It was built in 1984, so it is 41 years old, older 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.

It carries about 2,470 vehicles a day, roughly 32% of them trucks, projected to reach 2,964 by 2041. The structure is 222 ft (67.7 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-15 Nb.Off-Ramp
CrossesUnion Pacific Railroad
LocationSo.Of South Nephi Intchg.
RouteInterstate 15
CountyJuab County
StateUtah
Coordinates39.67915, -111.84267
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.1 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length222 ft (67.7 m)
Longest span98 ft (29.9 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic2,470 (2021)
Projected traffic2,964 by 2041
Trucks32%
Lanes on structure2
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 Nb.Off-Ramp over Union Pacific Railroad built?

It was built in 1984, making it 41 years old in 2025.

What condition is I-15 Nb.Off-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 March 2023.

How much traffic does I-15 Nb.Off-Ramp over Union Pacific Railroad carry?

About 2,470 vehicles per day (2021 count), of which roughly 32% are trucks.

How long is I-15 Nb.Off-Ramp over Union Pacific Railroad?

The structure is 222 ft (67.7 m) long with a longest span of 98 ft (29.9 m) and a deck 30 ft wide.

Who owns I-15 Nb.Off-Ramp over Union Pacific Railroad?

It is owned by the State Highway Agency.