US Bridges

I-70 (SR-70) over Salt Wash

Fair

Grand County, Utah · 4 Mi. E. of Thompson Int. · Structure no. 0V1267

Built
1975
50 years old
Condition
Fair
inspected September 2023
Type
Culvert
Steel
Length
36 ft
2 main spans
Daily traffic
8,647
2021 count
Owner
State
State Highway Agency

About this bridge

I-70 (SR-70) over Salt Wash is a steel culvert carrying I-70 (SR-70) over Salt Wash in Grand County, Utah. It was built in 1975, so it is 50 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 8,647 vehicles a day, roughly 47% of them trucks, projected to reach 10,376 by 2041. The structure is 36 ft (10.9 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI-70 (SR-70)
CrossesSalt Wash
Location4 Mi. E. of Thompson Int.
RouteInterstate 70
CountyGrand County
StateUtah
Coordinates38.94518, -109.65094
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating106.5 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length36 ft (10.9 m)
Longest span15 ft (4.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,647 (2021)
Projected traffic10,376 by 2041
Trucks47%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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) over Salt Wash built?

It was built in 1975, making it 50 years old in 2025.

What condition is I-70 (SR-70) over Salt 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 September 2023.

How much traffic does I-70 (SR-70) over Salt Wash carry?

About 8,647 vehicles per day (2021 count), of which roughly 47% are trucks.

How long is I-70 (SR-70) over Salt Wash?

The structure is 36 ft (10.9 m) long with a longest span of 15 ft (4.7 m).

Who owns I-70 (SR-70) over Salt Wash?

It is owned by the State Highway Agency.