US Bridges

County Road over I-15 (SR-15)

Fair

Box Elder County, Utah · 4.1 Mi.No.Riverside Int. · Structure no. 0F 480

Built
1989
36 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
258 ft
2 main spans
Daily traffic
2,000
2012 count
Owner
State
State Highway Agency

About this bridge

County Road over I-15 (SR-15) is a prestressed concrete continuous stringer/multi-beam or girder carrying County Road over I-15 (SR-15) in Box Elder County, Utah. It was built in 1989, so it is 36 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 2,000 vehicles a day, projected to reach 2,500 by 2034. The structure is 258 ft (78.7 m) long and 34 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesCounty Road
CrossesI-15 (SR-15)
Location4.1 Mi.No.Riverside Int.
RouteCounty Highway 0
CountyBox Elder County
StateUtah
Coordinates41.84278, -112.175
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating55 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length258 ft (78.7 m)
Longest span131 ft (39.8 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2012)
Projected traffic2,500 by 2034
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

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 County Road over I-15 (SR-15) built?

It was built in 1989, making it 36 years old in 2025.

What condition is County Road over I-15 (SR-15) 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 April 2023.

How much traffic does County Road over I-15 (SR-15) carry?

About 2,000 vehicles per day (2012 count).

How long is County Road over I-15 (SR-15)?

The structure is 258 ft (78.7 m) long with a longest span of 131 ft (39.8 m) and a deck 34 ft wide.

Who owns County Road over I-15 (SR-15)?

It is owned by the State Highway Agency.