US Bridges

I-84 (SR-84) Wbl over Cottonwood Creek

Fair

Morgan County, Utah · 1.4 Mi.East Mt.Green Int. · Structure no. 4F 97

Built
1966
59 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
11,990
2014 count
Owner
State
State Highway Agency

About this bridge

I-84 (SR-84) Wbl over Cottonwood Creek is a prestressed concrete stringer/multi-beam or girder carrying I-84 (SR-84) Wbl over Cottonwood Creek in Morgan County, Utah. It was built in 1966, so it is 59 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 11,990 vehicles a day, roughly 42% of them trucks, projected to reach 14,988 by 2034. The structure is 71 ft (21.6 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-84 (SR-84) Wbl
CrossesCottonwood Creek
Location1.4 Mi.East Mt.Green Int.
RouteInterstate 84
CountyMorgan County
StateUtah
Coordinates41.13806, -111.80333
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating21.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length71 ft (21.6 m)
Longest span67 ft (20.4 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic11,990 (2014)
Projected traffic14,988 by 2034
Trucks42%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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) Wbl over Cottonwood Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is I-84 (SR-84) Wbl over Cottonwood Creek 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) Wbl over Cottonwood Creek carry?

About 11,990 vehicles per day (2014 count), of which roughly 42% are trucks.

How long is I-84 (SR-84) Wbl over Cottonwood Creek?

The structure is 71 ft (21.6 m) long with a longest span of 67 ft (20.4 m) and a deck 41 ft wide.

Who owns I-84 (SR-84) Wbl over Cottonwood Creek?

It is owned by the State Highway Agency.