US Bridges

County Road over I-84 (SR-84)

Fair

Box Elder County, Utah · 2.5 Mi.Nw.Bothwell Intchg · Structure no. 0F 473

Built
1985
40 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
258 ft
2 main spans
Daily traffic
500
2012 count
Owner
State
State Highway Agency

About this bridge

County Road over I-84 (SR-84) is a prestressed concrete continuous stringer/multi-beam or girder carrying County Road over I-84 (SR-84) in Box Elder County, Utah. It was built in 1985, so it is 40 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 500 vehicles a day, projected to reach 1,000 by 2034. The structure is 258 ft (78.5 m) long and 34 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCounty Road
CrossesI-84 (SR-84)
Location2.5 Mi.Nw.Bothwell Intchg
RouteCounty Highway 0
CountyBox Elder County
StateUtah
Coordinates41.74778, -112.25833
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.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating46.7 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 (78.5 m)
Longest span135 ft (41.1 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2012)
Projected traffic1,000 by 2034
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 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-84 (SR-84) built?

It was built in 1985, making it 40 years old in 2025.

What condition is County Road over I-84 (SR-84) 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-84 (SR-84) carry?

About 500 vehicles per day (2012 count).

How long is County Road over I-84 (SR-84)?

The structure is 258 ft (78.5 m) long with a longest span of 135 ft (41.1 m) and a deck 34 ft wide.

Who owns County Road over I-84 (SR-84)?

It is owned by the State Highway Agency.