US Bridges

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

Poor

Box Elder County, Utah · At the Bothwell Interchg. · Structure no. 0F 472

Built
1989
36 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
254 ft
2 main spans
Daily traffic
645
2017 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 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 645 vehicles a day, roughly 52% of them trucks, projected to reach 774 by 2037. The structure is 254 ft (77.3 m) long and 34 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCo.Rd.-Intchg.X-Rd
CrossesI-84 (SR-84)
LocationAt the Bothwell Interchg.
RouteCounty Highway 84
CountyBox Elder County
StateUtah
Coordinates41.72028, -112.22861
Functional classUrban Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating80 US tons
Inventory rating46.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length254 ft (77.3 m)
Longest span126 ft (38.3 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic645 (2017)
Projected traffic774 by 2037
Trucks52%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed5 mi (8 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 Co.Rd.-Intchg.X-Rd over I-84 (SR-84) built?

It was built in 1989, making it 36 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 poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does Co.Rd.-Intchg.X-Rd over I-84 (SR-84) carry?

About 645 vehicles per day (2017 count), of which roughly 52% are trucks.

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

The structure is 254 ft (77.3 m) long with a longest span of 126 ft (38.3 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.