US Bridges

County Road over I-15 (SR-15) NB & SB

Fair

Box Elder County, Utah · 1 Mi.So.Of Elwood Intchg. · Structure no. 0F 4

Built
1963
62 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
247 ft
4 main spans
Daily traffic
500
2012 count
Owner
State
State Highway Agency

About this bridge

County Road over I-15 (SR-15) NB & SB is a prestressed concrete stringer/multi-beam or girder carrying County Road over I-15 (SR-15) NB & SB in Box Elder County, Utah. It was built in 1963, so it is 62 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 500 vehicles a day, projected to reach 1,000 by 2034. The structure is 247 ft (75.3 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road
CrossesI-15 (SR-15) NB & SB
Location1 Mi.So.Of Elwood Intchg.
RouteCity Street 0
CountyBox Elder County
StateUtah
Coordinates41.66972, -112.12889
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating90.4 US tons
Inventory rating59.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length247 ft (75.3 m)
Longest span80 ft (24.4 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic500 (2012)
Projected traffic1,000 by 2034
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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) NB & SB built?

It was built in 1963, making it 62 years old in 2025.

What condition is County Road over I-15 (SR-15) NB & SB 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) NB & SB carry?

About 500 vehicles per day (2012 count).

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

The structure is 247 ft (75.3 m) long with a longest span of 80 ft (24.4 m) and a deck 29 ft wide.

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

It is owned by the State Highway Agency.