US Bridges

I-70 (SR-70) Wbl over Cottonwood Canyon Wash

Fair

Sevier County, Utah · S.Of N.Richfield Intch. · Structure no. 4F 537

Built
1988
37 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
133 ft
1 main span
Daily traffic
7,301
2023 count
Owner
State
State Highway Agency

About this bridge

I-70 (SR-70) Wbl over Cottonwood Canyon Wash is a prestressed concrete stringer/multi-beam or girder carrying I-70 (SR-70) Wbl over Cottonwood Canyon Wash in Sevier County, Utah. It was built in 1988, so it is 37 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 7,301 vehicles a day, roughly 30% of them trucks, projected to reach 8,761 by 2043. The structure is 133 ft (40.4 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-70 (SR-70) Wbl
CrossesCottonwood Canyon Wash
LocationS.Of N.Richfield Intch.
RouteInterstate 70
CountySevier County
StateUtah
Coordinates38.78658, -112.09031
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.9 US tons
Inventory rating53.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length133 ft (40.4 m)
Longest span130 ft (39.6 m)
Deck width61 ft (18.7 m)
Roadway width58 ft (17.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,301 (2023)
Projected traffic8,761 by 2043
Trucks30%
Lanes on structure3
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-70 (SR-70) Wbl over Cottonwood Canyon Wash built?

It was built in 1988, making it 37 years old in 2025.

What condition is I-70 (SR-70) Wbl over Cottonwood Canyon Wash 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 May 2023.

How much traffic does I-70 (SR-70) Wbl over Cottonwood Canyon Wash carry?

About 7,301 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is I-70 (SR-70) Wbl over Cottonwood Canyon Wash?

The structure is 133 ft (40.4 m) long with a longest span of 130 ft (39.6 m) and a deck 61 ft wide.

Who owns I-70 (SR-70) Wbl over Cottonwood Canyon Wash?

It is owned by the State Highway Agency.