US Bridges

I-15 (SR-15) Nbl over I-80 (SR-80) Wbl

Fair

Salt Lake County, Utah · APPROX.300 SO.700 W. Slc · Structure no. 1F 659

Built
1999
26 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
210 ft
3 main spans
Daily traffic
138,665
2014 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Nbl over I-80 (SR-80) Wbl is a prestressed concrete continuous stringer/multi-beam or girder carrying I-15 (SR-15) Nbl over I-80 (SR-80) Wbl 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 138,665 vehicles a day, roughly 9% of them trucks, projected to reach 173,332 by 2034. The structure is 210 ft (63.9 m) long and 141 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-15 (SR-15) Nbl
CrossesI-80 (SR-80) Wbl
LocationAPPROX.300 SO.700 W. Slc
RouteInterstate 15
CountySalt Lake County
StateUtah
Coordinates40.76311, -111.91361
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
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 rating71.4 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 length210 ft (63.9 m)
Longest span112 ft (34 m)
Deck width141 ft (42.9 m)
Roadway width104 ft (31.8 m)
Vertical clearance over deck18 ft (5.3 m)

Traffic and service

Average daily traffic138,665 (2014)
Projected traffic173,332 by 2034
Trucks9%
Lanes on structure6
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 I-80 (SR-80) Wbl built?

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

What condition is I-15 (SR-15) Nbl over I-80 (SR-80) Wbl 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 I-80 (SR-80) Wbl carry?

About 138,665 vehicles per day (2014 count), of which roughly 9% are trucks.

How long is I-15 (SR-15) Nbl over I-80 (SR-80) Wbl?

The structure is 210 ft (63.9 m) long with a longest span of 112 ft (34 m) and a deck 141 ft wide.

Who owns I-15 (SR-15) Nbl over I-80 (SR-80) Wbl?

It is owned by the State Highway Agency.