US Bridges

I-15RAMP to SR-270 over 400 West Street

Fair

Salt Lake County, Utah · 1000 So 400 West Slc · Structure no. 2C 400

Built
1967
58 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
155 ft
3 main spans
Daily traffic
25,275
2014 count
Owner
State
State Highway Agency

About this bridge

I-15RAMP to SR-270 over 400 West Street is a steel stringer/multi-beam or girder carrying I-15RAMP to SR-270 over 400 West Street in Salt Lake County, Utah. It was built in 1967, so it is 58 years old, older 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 25,275 vehicles a day, roughly 7% of them trucks, projected to reach 31,594 by 2034. The structure is 155 ft (47.2 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-15RAMP to SR-270
Crosses400 West Street
Location1000 So 400 West Slc
RouteState Highway 15
CountySalt Lake County
StateUtah
Coordinates40.74712, -111.90314
Functional classRural 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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.4 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length155 ft (47.2 m)
Longest span63 ft (19.3 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic25,275 (2014)
Projected traffic31,594 by 2034
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$10,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-15RAMP to SR-270 over 400 West Street built?

It was built in 1967, making it 58 years old in 2025.

What condition is I-15RAMP to SR-270 over 400 West Street 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-15RAMP to SR-270 over 400 West Street carry?

About 25,275 vehicles per day (2014 count), of which roughly 7% are trucks.

How long is I-15RAMP to SR-270 over 400 West Street?

The structure is 155 ft (47.2 m) long with a longest span of 63 ft (19.3 m) and a deck 33 ft wide.

Who owns I-15RAMP to SR-270 over 400 West Street?

It is owned by the State Highway Agency.