US Bridges

US-40 (SR-40) over Duchesne River

Fair

Duchesne County, Utah · North Side of Myton · Structure no. 0C 794

Built
1996
29 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
163 ft
1 main span
Daily traffic
7,815
2022 count
Owner
State
State Highway Agency

About this bridge

US-40 (SR-40) over Duchesne River is a steel stringer/multi-beam or girder carrying US-40 (SR-40) over Duchesne River in Duchesne County, Utah. It was built in 1996, so it is 29 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 7,815 vehicles a day, roughly 41% of them trucks, projected to reach 9,378 by 2042. The structure is 163 ft (49.8 m) long and 65 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesUS-40 (SR-40)
CrossesDuchesne River
LocationNorth Side of Myton
RouteU.S. Route 40
CountyDuchesne County
StateUtah
Coordinates40.19944, -110.06778
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.7 US tons
Inventory rating46.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length163 ft (49.8 m)
Longest span161 ft (49 m)
Deck width65 ft (19.9 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,815 (2022)
Projected traffic9,378 by 2042
Trucks41%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Duchesne River built?

It was built in 1996, making it 29 years old in 2025.

What condition is US-40 (SR-40) over Duchesne River 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 Duchesne River carry?

About 7,815 vehicles per day (2022 count), of which roughly 41% are trucks.

How long is US-40 (SR-40) over Duchesne River?

The structure is 163 ft (49.8 m) long with a longest span of 161 ft (49 m) and a deck 65 ft wide.

Who owns US-40 (SR-40) over Duchesne River?

It is owned by the State Highway Agency.