US Bridges

I-15 SB over 100 East

Good

Utah County, Utah · I-15 SB over Lehi 100 E · Structure no. 3F 883

Built
2020
5 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Concrete
Length
63 ft
1 main span
Daily traffic
167,000
2019 count
Owner
State
State Highway Agency

About this bridge

I-15 SB over 100 East is a concrete stringer/multi-beam or girder carrying I-15 SB over 100 East 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 167,000 vehicles a day, roughly 14% of them trucks, projected to reach 208,750 by 2039. The structure is 63 ft (19.3 m) long and 100 ft wide.

Location

Open in Google Maps
CarriesI-15 SB
Crosses100 East
LocationI-15 SB over Lehi 100 E
RouteState Highway 15
CountyUtah County
StateUtah
Coordinates40.39972, -111.84694
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
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 rating46.4 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length63 ft (19.3 m)
Longest span61 ft (18.7 m)
Deck width100 ft (30.6 m)
Roadway width97 ft (29.7 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic167,000 (2019)
Projected traffic208,750 by 2039
Trucks14%
Lanes on structure6
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 SB over 100 East built?

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

What condition is I-15 SB over 100 East 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 2025.

How much traffic does I-15 SB over 100 East carry?

About 167,000 vehicles per day (2019 count), of which roughly 14% are trucks.

How long is I-15 SB over 100 East?

The structure is 63 ft (19.3 m) long with a longest span of 61 ft (18.7 m) and a deck 100 ft wide.

Who owns I-15 SB over 100 East?

It is owned by the State Highway Agency.