US Bridges

County Road over Thompson Wash

Fair

Grand County, Utah · 1.5 Mi. Sw. of Thompson · Structure no. 019020C

Built
1919
106 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
26
2010 count
Owner
County
County Highway Agency

About this bridge

County Road over Thompson Wash is a steel stringer/multi-beam or girder carrying County Road over Thompson Wash in Grand County, Utah. It was built in 1919, so it is 106 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 5 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 26 vehicles a day, projected to reach 30 by 2030. The structure is 33 ft (10 m) long and 18 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

Open in Google Maps
CarriesCounty Road
CrossesThompson Wash
Location1.5 Mi. Sw. of Thompson
RouteCounty Highway 0
CountyGrand County
StateUtah
Coordinates38.96378, -109.72467
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length33 ft (10 m)
Longest span30 ft (9 m)
Deck width18 ft (5.6 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic26 (2010)
Projected traffic30 by 2030
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Road over Thompson Wash built?

It was built in 1919, making it 106 years old in 2025.

What condition is County Road over Thompson 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 January 2024.

How much traffic does County Road over Thompson Wash carry?

About 26 vehicles per day (2010 count).

How long is County Road over Thompson Wash?

The structure is 33 ft (10 m) long with a longest span of 30 ft (9 m) and a deck 18 ft wide.

Who owns County Road over Thompson Wash?

It is owned by the County Highway Agency.