US Bridges

I-15 (SR-15) Nbl over Lehi Main ST SR-73

Fair

Utah County, Utah · Lehi Main St.Interchange · Structure no. 1C 783

Built
1993
32 years old, rebuilt 2019
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
205 ft
1 main span
Daily traffic
179,486
2022 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Nbl over Lehi Main ST SR-73 is a steel stringer/multi-beam or girder carrying I-15 (SR-15) Nbl over Lehi Main ST SR-73 in Utah County, Utah. It was built in 1993 and reconstructed in 2019, so it is 32 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 179,486 vehicles a day, roughly 17% of them trucks, projected to reach 215,383 by 2042. The structure is 205 ft (62.4 m) long and 101 ft wide.

Location

Open in Google Maps
CarriesI-15 (SR-15) Nbl
CrossesLehi Main ST SR-73
LocationLehi Main St.Interchange
RouteInterstate 15
CountyUtah County
StateUtah
Coordinates40.38796, -111.83333
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
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 rating97.9 US tons
Inventory rating51.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length205 ft (62.4 m)
Longest span202 ft (61.6 m)
Deck width101 ft (30.7 m)
Roadway width98 ft (29.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic179,486 (2022)
Projected traffic215,383 by 2042
Trucks17%
Lanes on structure6
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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-15 (SR-15) Nbl over Lehi Main ST SR-73 built?

It was built in 1993, making it 32 years old in 2025. It was reconstructed in 2019.

What condition is I-15 (SR-15) Nbl over Lehi Main ST SR-73 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 February 2023.

How much traffic does I-15 (SR-15) Nbl over Lehi Main ST SR-73 carry?

About 179,486 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is I-15 (SR-15) Nbl over Lehi Main ST SR-73?

The structure is 205 ft (62.4 m) long with a longest span of 202 ft (61.6 m) and a deck 101 ft wide.

Who owns I-15 (SR-15) Nbl over Lehi Main ST SR-73?

It is owned by the State Highway Agency.