US Bridges

I-15 over US-89

Good

Utah County, Utah · I-15 over US-89 · Structure no. 3F 888

Built
2020
5 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
320 ft
2 main spans
Daily traffic
166,000
2019 count
Owner
State
State Highway Agency

About this bridge

I-15 over US-89 is a concrete stringer/multi-beam or girder carrying I-15 over US-89 in Utah County, Utah. It was built in 2020, so it is 5 years old, younger than the Utah average of 40.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 166,000 vehicles a day, roughly 14% of them trucks, projected to reach 208,750 by 2039. The structure is 320 ft (97.6 m) long and 113 ft wide.

CarriesI-15
CrossesUS-89
LocationI-15 over US-89
StateUtah
Coordinates40.39194, -111.83515
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.5 US tons
Inventory rating42.9 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length320 ft (97.6 m)
Longest span171 ft (52.2 m)
Deck width113 ft (34.4 m)
Roadway width107 ft (32.7 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic166,000 (2019)
Projected traffic208,750 by 2039
Trucks14%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed—
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 over US-89 built?

It was built in 2020, making it 5 years old in 2025.

What condition is I-15 over US-89 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does I-15 over US-89 carry?

About 166,000 vehicles per day (2019 count), of which roughly 14% are trucks.

How long is I-15 over US-89?

The structure is 320 ft (97.6 m) long with a longest span of 171 ft (52.2 m) and a deck 113 ft wide.

Who owns I-15 over US-89?

It is owned by the State Highway Agency.