US Bridges

I-15NB (SR-15) over 300 West Street

Fair

Utah County, Utah · 900 NO.300 W. Spanish Fk. · Structure no. 1F 831

Built
2012
13 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
97 ft
1 main span
Daily traffic
48,010
2014 count
Owner
State
State Highway Agency

About this bridge

I-15NB (SR-15) over 300 West Street is a prestressed concrete stringer/multi-beam or girder carrying I-15NB (SR-15) over 300 West Street in Utah County, Utah. It was built in 2012, so it is 13 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 48,010 vehicles a day, roughly 26% of them trucks, projected to reach 60,013 by 2034. The structure is 97 ft (29.5 m) long and 85 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-15NB (SR-15)
Crosses300 West Street
Location900 NO.300 W. Spanish Fk.
RouteInterstate 15
CountyUtah County
StateUtah
Coordinates40.1213, -111.66009
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length97 ft (29.5 m)
Longest span93 ft (28.3 m)
Deck width85 ft (26 m)
Roadway width82 ft (25.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48,010 (2014)
Projected traffic60,013 by 2034
Trucks26%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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-15NB (SR-15) over 300 West Street built?

It was built in 2012, making it 13 years old in 2025.

What condition is I-15NB (SR-15) over 300 West Street 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 September 2024.

How much traffic does I-15NB (SR-15) over 300 West Street carry?

About 48,010 vehicles per day (2014 count), of which roughly 26% are trucks.

How long is I-15NB (SR-15) over 300 West Street?

The structure is 97 ft (29.5 m) long with a longest span of 93 ft (28.3 m) and a deck 85 ft wide.

Who owns I-15NB (SR-15) over 300 West Street?

It is owned by the State Highway Agency.