US Bridges

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

Fair

Salt Lake County, Utah · APPROX.800 W.300 So. Slc. · Structure no. 3C 878

Built
2000
25 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
157 ft
1 main span
Daily traffic
138,665
2014 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Sbl over I-80 (SR-80) Wbl is a steel stringer/multi-beam or girder carrying I-15 (SR-15) Sbl over I-80 (SR-80) Wbl in Salt Lake County, Utah. It was built in 2000, so it is 25 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 157 ft (48 m) long and 115 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-15 (SR-15) Sbl
CrossesI-80 (SR-80) Wbl
LocationAPPROX.800 W.300 So. Slc.
RouteInterstate 15
CountySalt Lake County
StateUtah
Coordinates40.76445, -111.91428
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.
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 rating42.9 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length157 ft (48 m)
Longest span154 ft (47 m)
Deck width115 ft (34.9 m)
Roadway width100 ft (30.6 m)
Vertical clearance over deck17 ft (5.3 m)

Traffic and service

Average daily traffic138,665 (2014)
Projected traffic173,332 by 2034
Trucks9%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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) Sbl over I-80 (SR-80) Wbl built?

It was built in 2000, making it 25 years old in 2025.

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

The structure is 157 ft (48 m) long with a longest span of 154 ft (47 m) and a deck 115 ft wide.

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

It is owned by the State Highway Agency.