US Bridges

I-15 (SR-15) Nbl over Deer Crossing

Poor

Juab County, Utah · 4 Mi.No.Mills Jct.Intchg. · Structure no. 1F 454

Built
1984
41 years old
Condition
Poor
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
34,167
2022 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Nbl over Deer Crossing is a prestressed concrete stringer/multi-beam or girder carrying I-15 (SR-15) Nbl over Deer Crossing 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 34,167 vehicles a day, roughly 32% of them trucks, projected to reach 41,000 by 2042. The structure is 66 ft (20 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-15 (SR-15) Nbl
CrossesDeer Crossing
Location4 Mi.No.Mills Jct.Intchg.
RouteInterstate 15
CountyJuab County
StateUtah
Coordinates39.54607, -111.95164
Functional classRural Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length66 ft (20 m)
Longest span63 ft (19.2 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic34,167 (2022)
Projected traffic41,000 by 2042
Trucks32%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
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) Nbl over Deer Crossing built?

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

What condition is I-15 (SR-15) Nbl over Deer Crossing in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2023.

How much traffic does I-15 (SR-15) Nbl over Deer Crossing carry?

About 34,167 vehicles per day (2022 count), of which roughly 32% are trucks.

How long is I-15 (SR-15) Nbl over Deer Crossing?

The structure is 66 ft (20 m) long with a longest span of 63 ft (19.2 m) and a deck 44 ft wide.

Who owns I-15 (SR-15) Nbl over Deer Crossing?

It is owned by the State Highway Agency.