US Bridges

Cobblestone RD over Duchesne River

Fair

Duchesne County, Utah · Over Duchesne River · Structure no. 013073C

Built
2017
8 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
124 ft
1 main span
Daily traffic
100
2017 count
Owner
County
County Highway Agency

About this bridge

Cobblestone RD over Duchesne River is a steel stringer/multi-beam or girder carrying Cobblestone RD over Duchesne River in Duchesne County, Utah. It was built in 2017, so it is 8 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 100 vehicles a day, projected to reach 125 by 2037. The structure is 124 ft (37.8 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCobblestone RD
CrossesDuchesne River
LocationOver Duchesne River
RouteCounty Highway 0
CountyDuchesne County
StateUtah
Coordinates40.35933, -110.72014
Functional classRural Local

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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating53.6 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length124 ft (37.8 m)
Longest span74 ft (22.5 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2017)
Projected traffic125 by 2037
Trucks0%
Lanes on structure2
Traffic directionHighway traffic not carried
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Cobblestone RD over Duchesne River built?

It was built in 2017, making it 8 years old in 2025.

What condition is Cobblestone RD 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 April 2024.

How much traffic does Cobblestone RD over Duchesne River carry?

About 100 vehicles per day (2017 count).

How long is Cobblestone RD over Duchesne River?

The structure is 124 ft (37.8 m) long with a longest span of 74 ft (22.5 m) and a deck 29 ft wide.

Who owns Cobblestone RD over Duchesne River?

It is owned by the County Highway Agency.