US Bridges

I-84 (SR-84) over Co. Road to Devils Slide

Fair

Morgan County, Utah · Devils Slide Interchange · Structure no. 0F 262

Built
1973
52 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
109 ft
1 main span
Daily traffic
12,609
2022 count
Owner
State
State Highway Agency

About this bridge

I-84 (SR-84) over Co. Road to Devils Slide is a prestressed concrete stringer/multi-beam or girder carrying I-84 (SR-84) over Co. Road to Devils Slide in Morgan County, Utah. It was built in 1973, so it is 52 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 12,609 vehicles a day, roughly 53% of them trucks, projected to reach 15,131 by 2042. The structure is 109 ft (33.2 m) long and 94 ft wide. If it were closed, the detour would be 54.1 mi (87 km).

Location

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CarriesI-84 (SR-84)
CrossesCo. Road to Devils Slide
LocationDevils Slide Interchange
RouteInterstate 84
CountyMorgan County
StateUtah
Coordinates41.05934, -111.54033
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.
Substructure7 GoodSome minor problems.
Last inspectionJuly 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating22.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length109 ft (33.2 m)
Longest span103 ft (31.5 m)
Deck width94 ft (28.6 m)
Roadway width91 ft (27.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,609 (2022)
Projected traffic15,131 by 2042
Trucks53%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed54.1 mi (87 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-84 (SR-84) over Co. Road to Devils Slide built?

It was built in 1973, making it 52 years old in 2025.

What condition is I-84 (SR-84) over Co. Road to Devils Slide 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 July 2023.

How much traffic does I-84 (SR-84) over Co. Road to Devils Slide carry?

About 12,609 vehicles per day (2022 count), of which roughly 53% are trucks.

How long is I-84 (SR-84) over Co. Road to Devils Slide?

The structure is 109 ft (33.2 m) long with a longest span of 103 ft (31.5 m) and a deck 94 ft wide.

Who owns I-84 (SR-84) over Co. Road to Devils Slide?

It is owned by the State Highway Agency.