US Bridges

US-40 (SR-40) over Twelve Mile Wash

Fair

Uintah County, Utah · 8.7 Miles West of Vernal · Structure no. 0E1500

Built
1965
60 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
6,411
2017 count
Owner
State
State Highway Agency

About this bridge

US-40 (SR-40) over Twelve Mile Wash is a concrete continuous culvert carrying US-40 (SR-40) over Twelve Mile Wash in Uintah County, Utah. It was built in 1965, so it is 60 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 6,411 vehicles a day, roughly 48% of them trucks, projected to reach 7,693 by 2037. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesUS-40 (SR-40)
CrossesTwelve Mile Wash
Location8.7 Miles West of Vernal
RouteU.S. Route 40
CountyUintah County
StateUtah
Coordinates40.33667, -109.63547
Functional classRural Principal Arterial - Other

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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating18.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span14 ft (4.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,411 (2017)
Projected traffic7,693 by 2037
Trucks48%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 km)
TollOn a free road
National Highway SystemYes

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 US-40 (SR-40) over Twelve Mile Wash built?

It was built in 1965, making it 60 years old in 2025.

What condition is US-40 (SR-40) over Twelve Mile 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 July 2023.

How much traffic does US-40 (SR-40) over Twelve Mile Wash carry?

About 6,411 vehicles per day (2017 count), of which roughly 48% are trucks.

How long is US-40 (SR-40) over Twelve Mile Wash?

The structure is 30 ft (9.1 m) long with a longest span of 14 ft (4.2 m).

Who owns US-40 (SR-40) over Twelve Mile Wash?

It is owned by the State Highway Agency.