US Bridges

Co.Rd.-Intchg.X-Rd over I-84 (SR-84)

Fair

Box Elder County, Utah · At Whites Valley Intchg. · Structure no. 0F 474

Built
1985
40 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
249 ft
2 main spans
Daily traffic
247
2022 count
Owner
State
State Highway Agency

About this bridge

Co.Rd.-Intchg.X-Rd over I-84 (SR-84) is a prestressed concrete continuous stringer/multi-beam or girder carrying Co.Rd.-Intchg.X-Rd 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 247 vehicles a day, roughly 52% of them trucks, projected to reach 296 by 2042. The structure is 249 ft (75.8 m) long and 34 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

Location

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CarriesCo.Rd.-Intchg.X-Rd
CrossesI-84 (SR-84)
LocationAt Whites Valley Intchg.
RouteInterstate 84
CountyBox Elder County
StateUtah
Coordinates41.79944, -112.30472
Functional classRural 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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.4 US tons
Inventory rating48.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length249 ft (75.8 m)
Longest span126 ft (38.4 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic247 (2022)
Projected traffic296 by 2042
Trucks52%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed49.7 mi (80 km)
TollOn a free road
National Highway SystemYes

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 Co.Rd.-Intchg.X-Rd over I-84 (SR-84) built?

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

What condition is Co.Rd.-Intchg.X-Rd 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 Co.Rd.-Intchg.X-Rd over I-84 (SR-84) carry?

About 247 vehicles per day (2022 count), of which roughly 52% are trucks.

How long is Co.Rd.-Intchg.X-Rd over I-84 (SR-84)?

The structure is 249 ft (75.8 m) long with a longest span of 126 ft (38.4 m) and a deck 34 ft wide.

Who owns Co.Rd.-Intchg.X-Rd over I-84 (SR-84)?

It is owned by the State Highway Agency.