US Bridges

I-15 (SR-15) SB over SR-71 Intchg. X-Road.

Good

Salt Lake County, Utah · At the Draper X-Roads.Int · Structure no. 3F 694

Built
2004
21 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
206 ft
1 main span
Daily traffic
176,645
2014 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) SB over SR-71 Intchg. X-Road. is a prestressed concrete continuous stringer/multi-beam or girder carrying I-15 (SR-15) SB over SR-71 Intchg. X-Road. in Salt Lake County, Utah. It was built in 2004, so it is 21 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 176,645 vehicles a day, roughly 21% of them trucks, projected to reach 220,807 by 2034. The structure is 206 ft (62.7 m) long and 88 ft wide.

Location

Open in Google Maps
CarriesI-15 (SR-15) SB
CrossesSR-71 Intchg. X-Road.
LocationAt the Draper X-Roads.Int
RouteInterstate 15
CountySalt Lake County
StateUtah
Coordinates40.52713, -111.89148
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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating57.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length206 ft (62.7 m)
Longest span196 ft (59.6 m)
Deck width88 ft (26.9 m)
Roadway width84 ft (25.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic176,645 (2014)
Projected traffic220,807 by 2034
Trucks21%
Lanes on structure5
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 (SR-15) SB over SR-71 Intchg. X-Road. built?

It was built in 2004, making it 21 years old in 2025.

What condition is I-15 (SR-15) SB over SR-71 Intchg. X-Road. 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 November 2024.

How much traffic does I-15 (SR-15) SB over SR-71 Intchg. X-Road. carry?

About 176,645 vehicles per day (2014 count), of which roughly 21% are trucks.

How long is I-15 (SR-15) SB over SR-71 Intchg. X-Road.?

The structure is 206 ft (62.7 m) long with a longest span of 196 ft (59.6 m) and a deck 88 ft wide.

Who owns I-15 (SR-15) SB over SR-71 Intchg. X-Road.?

It is owned by the State Highway Agency.