US Bridges

RP.US89NB to I15NB over Ramp I-15NB to US-89NB

Fair

Salt Lake County, Utah · Beck Street Interchange · Structure no. 1D 672

Built
1961
64 years old, rebuilt 2017
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
270 ft
3 main spans
Daily traffic
20,225
2014 count
Owner
State
State Highway Agency

About this bridge

RP.US89NB to I15NB over Ramp I-15NB to US-89NB is a concrete continuous box beam or girders - multiple carrying RP.US89NB to I15NB over Ramp I-15NB to US-89NB in Salt Lake County, Utah. It was built in 1961 and reconstructed in 2017, so it is 64 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 20,225 vehicles a day, roughly 18% of them trucks, projected to reach 25,282 by 2034. The structure is 270 ft (82.3 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesRP.US89NB to I15NB
CrossesRamp I-15NB to US-89NB
LocationBeck Street Interchange
RouteU.S. Route 89
CountySalt Lake County
StateUtah
Coordinates40.81847, -111.91633
Functional classUrban Other Principal Arterial

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 inspectionSeptember 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 alignment6: Equal to present minimum criteria
Operating rating53.6 US tons
Inventory rating32.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length270 ft (82.3 m)
Longest span104 ft (31.7 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,225 (2014)
Projected traffic25,282 by 2034
Trucks18%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was RP.US89NB to I15NB over Ramp I-15NB to US-89NB built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2017.

What condition is RP.US89NB to I15NB over Ramp I-15NB to US-89NB 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 September 2024.

How much traffic does RP.US89NB to I15NB over Ramp I-15NB to US-89NB carry?

About 20,225 vehicles per day (2014 count), of which roughly 18% are trucks.

How long is RP.US89NB to I15NB over Ramp I-15NB to US-89NB?

The structure is 270 ft (82.3 m) long with a longest span of 104 ft (31.7 m) and a deck 32 ft wide.

Who owns RP.US89NB to I15NB over Ramp I-15NB to US-89NB?

It is owned by the State Highway Agency.