US Bridges

US-6 (SR-6) over Marsh Flat Wash

Fair

Emery County, Utah · 4.5 Mi.North of Woodside · Structure no. 0E1308

Built
1963
62 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
7,203
2021 count
Owner
State
State Highway Agency

About this bridge

US-6 (SR-6) over Marsh Flat Wash is a concrete continuous culvert carrying US-6 (SR-6) over Marsh Flat Wash in Emery County, Utah. It was built in 1963, so it is 62 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 7,203 vehicles a day, roughly 45% of them trucks, projected to reach 8,644 by 2041. The structure is 26 ft (8 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesUS-6 (SR-6)
CrossesMarsh Flat Wash
Location4.5 Mi.North of Woodside
RouteU.S. Route 6
CountyEmery County
StateUtah
Coordinates39.33117, -110.36891
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.2 US tons
Inventory rating41.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length26 ft (8 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,203 (2021)
Projected traffic8,644 by 2041
Trucks45%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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 US-6 (SR-6) over Marsh Flat Wash built?

It was built in 1963, making it 62 years old in 2025.

What condition is US-6 (SR-6) over Marsh Flat 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 US-6 (SR-6) over Marsh Flat Wash carry?

About 7,203 vehicles per day (2021 count), of which roughly 45% are trucks.

How long is US-6 (SR-6) over Marsh Flat Wash?

The structure is 26 ft (8 m) long with a longest span of 12 ft (3.7 m).

Who owns US-6 (SR-6) over Marsh Flat Wash?

It is owned by the State Highway Agency.