US Bridges

County Road over Onion Creek

FairPosted for load

Grand County, Utah · 12 Miles Ne. of Moab · Structure no. 019039C

Built
1953
72 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
19
2010 count
Owner
County
County Highway Agency

About this bridge

County Road over Onion Creek is a steel stringer/multi-beam or girder carrying County Road over Onion Creek in Grand County, Utah. It was built in 1953, so it is 72 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. Its operating status is: posted for load restriction.

It carries about 19 vehicles a day, projected to reach 22 by 2030. The structure is 42 ft (12.7 m) long and 14 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesCounty Road
CrossesOnion Creek
Location12 Miles Ne. of Moab
RouteCounty Highway 0
CountyGrand County
StateUtah
Coordinates38.7065, -109.30911
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating21.4 US tons
Inventory rating14.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20 + Mod
Structure length42 ft (12.7 m)
Longest span37 ft (11.4 m)
Deck width14 ft (4.2 m)
Roadway width13 ft (4 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic19 (2010)
Projected traffic22 by 2030
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 County Road over Onion Creek built?

It was built in 1953, making it 72 years old in 2025.

What condition is County Road over Onion Creek 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 Onion Creek carry?

About 19 vehicles per day (2010 count).

How long is County Road over Onion Creek?

The structure is 42 ft (12.7 m) long with a longest span of 37 ft (11.4 m) and a deck 14 ft wide.

Who owns County Road over Onion Creek?

It is owned by the County Highway Agency.