US Bridges

I-15 (SR-15) Nbl over 400 North Street

Fair

Utah County, Utah · I-15 & 400 North in O · Structure no. 1F 818

Built
2011
14 years old
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
106 ft
1 main span
Daily traffic
152,799
2022 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Nbl over 400 North Street is a prestressed concrete stringer/multi-beam or girder carrying I-15 (SR-15) Nbl over 400 North Street in Utah County, Utah. It was built in 2011, so it is 14 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 152,799 vehicles a day, roughly 20% of them trucks, projected to reach 183,359 by 2042. The structure is 106 ft (32.3 m) long and 113 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-15 (SR-15) Nbl
Crosses400 North Street
LocationI-15 & 400 North in O
RouteInterstate 15
CountyUtah County
StateUtah
Coordinates40.30429, -111.72566
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.
Substructure8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.1 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length106 ft (32.3 m)
Longest span103 ft (31.4 m)
Deck width113 ft (34.3 m)
Roadway width104 ft (31.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic152,799 (2022)
Projected traffic183,359 by 2042
Trucks20%
Lanes on structure7
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 400 North Street built?

It was built in 2011, making it 14 years old in 2025.

What condition is I-15 (SR-15) Nbl over 400 North 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 January 2023.

How much traffic does I-15 (SR-15) Nbl over 400 North Street carry?

About 152,799 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is I-15 (SR-15) Nbl over 400 North Street?

The structure is 106 ft (32.3 m) long with a longest span of 103 ft (31.4 m) and a deck 113 ft wide.

Who owns I-15 (SR-15) Nbl over 400 North Street?

It is owned by the State Highway Agency.