US Bridges

I-15 (SR-15) Nbl over SR-97 5600 So. Roy

Fair

Weber County, Utah · Roy Interchange (5600 S.) · Structure no. 1F 66

Built
1966
59 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
183 ft
3 main spans
Daily traffic
107,360
2014 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Nbl over SR-97 5600 So. Roy is a prestressed concrete stringer/multi-beam or girder carrying I-15 (SR-15) Nbl over SR-97 5600 So. Roy in Weber County, Utah. It was built in 1966, so it is 59 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 107,360 vehicles a day, roughly 33% of them trucks, projected to reach 134,200 by 2034. The structure is 183 ft (55.9 m) long and 68 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-97 5600 So. Roy
LocationRoy Interchange (5600 S.)
RouteInterstate 15
CountyWeber County
StateUtah
Coordinates41.16139, -112.02306
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length183 ft (55.9 m)
Longest span86 ft (26.2 m)
Deck width68 ft (20.8 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic107,360 (2014)
Projected traffic134,200 by 2034
Trucks33%
Lanes on structure4
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-97 5600 So. Roy built?

It was built in 1966, making it 59 years old in 2025.

What condition is I-15 (SR-15) Nbl over SR-97 5600 So. Roy 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 June 2023.

How much traffic does I-15 (SR-15) Nbl over SR-97 5600 So. Roy carry?

About 107,360 vehicles per day (2014 count), of which roughly 33% are trucks.

How long is I-15 (SR-15) Nbl over SR-97 5600 So. Roy?

The structure is 183 ft (55.9 m) long with a longest span of 86 ft (26.2 m) and a deck 68 ft wide.

Who owns I-15 (SR-15) Nbl over SR-97 5600 So. Roy?

It is owned by the State Highway Agency.