US Bridges

I-15 (SR-15) Nbl over SR-270 Sbl

Fair

Salt Lake County, Utah · APPROX.450 W.1200 So.Slc. · Structure no. 1F 636N

Built
1999
26 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
212 ft
3 main spans
Daily traffic
217,800
2014 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Nbl over SR-270 Sbl is a prestressed concrete continuous stringer/multi-beam or girder carrying I-15 (SR-15) Nbl over SR-270 Sbl in Salt Lake County, Utah. It was built in 1999, so it is 26 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 217,800 vehicles a day, roughly 7% of them trucks, projected to reach 272,250 by 2034. The structure is 212 ft (64.6 m) long and 108 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-15 (SR-15) Nbl
CrossesSR-270 Sbl
LocationAPPROX.450 W.1200 So.Slc.
RouteInterstate 15
CountySalt Lake County
StateUtah
Coordinates40.74498, -111.90455
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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20 + Mod
Structure length212 ft (64.6 m)
Longest span86 ft (26.2 m)
Deck width108 ft (33 m)
Roadway width104 ft (31.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic217,800 (2014)
Projected traffic272,250 by 2034
Trucks7%
Lanes on structure7
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
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) Nbl over SR-270 Sbl built?

It was built in 1999, making it 26 years old in 2025.

What condition is I-15 (SR-15) Nbl over SR-270 Sbl 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 July 2024.

How much traffic does I-15 (SR-15) Nbl over SR-270 Sbl carry?

About 217,800 vehicles per day (2014 count), of which roughly 7% are trucks.

How long is I-15 (SR-15) Nbl over SR-270 Sbl?

The structure is 212 ft (64.6 m) long with a longest span of 86 ft (26.2 m) and a deck 108 ft wide.

Who owns I-15 (SR-15) Nbl over SR-270 Sbl?

It is owned by the State Highway Agency.