US Bridges

I-15 SB (SR-15) over SR-175 11400 South St.

Fair

Salt Lake County, Utah · At the 114th So. Intchg. · Structure no. 3F 784

Built
2010
15 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
216 ft
1 main span
Daily traffic
159,640
2014 count
Owner
State
State Highway Agency

About this bridge

I-15 SB (SR-15) over SR-175 11400 South St. is a prestressed concrete stringer/multi-beam or girder carrying I-15 SB (SR-15) over SR-175 11400 South St. in Salt Lake County, Utah. It was built in 2010, so it is 15 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 159,640 vehicles a day, roughly 20% of them trucks, projected to reach 199,550 by 2034. The structure is 216 ft (65.7 m) long and 91 ft wide.

Location

Open in Google Maps
CarriesI-15 SB (SR-15)
CrossesSR-175 11400 South St.
LocationAt the 114th So. Intchg.
RouteInterstate 15
CountySalt Lake County
StateUtah
Coordinates40.5447, -111.89521
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating103.6 US tons
Inventory rating75 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length216 ft (65.7 m)
Longest span212 ft (64.6 m)
Deck width91 ft (27.6 m)
Roadway width88 ft (26.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic159,640 (2014)
Projected traffic199,550 by 2034
Trucks20%
Lanes on structure5
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
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 (SR-15) over SR-175 11400 South St. built?

It was built in 2010, making it 15 years old in 2025.

What condition is I-15 SB (SR-15) over SR-175 11400 South St. 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 November 2024.

How much traffic does I-15 SB (SR-15) over SR-175 11400 South St. carry?

About 159,640 vehicles per day (2014 count), of which roughly 20% are trucks.

How long is I-15 SB (SR-15) over SR-175 11400 South St.?

The structure is 216 ft (65.7 m) long with a longest span of 212 ft (64.6 m) and a deck 91 ft wide.

Who owns I-15 SB (SR-15) over SR-175 11400 South St.?

It is owned by the State Highway Agency.