US Bridges

County Road over Mammoth Creek

FairPosted for load

Garfield County, Utah · 9 Miles Sw. of Hatch · Structure no. 017055C

Built
2010
15 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
63
2010 count
Owner
County
County Highway Agency

About this bridge

County Road over Mammoth Creek is a steel stringer/multi-beam or girder carrying County Road over Mammoth Creek in Garfield County, Utah. It was built in 2010, so it is 15 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 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 63 vehicles a day, roughly 1% of them trucks, projected to reach 77 by 2030. The structure is 70 ft (21.3 m) long and 28 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesCounty Road
CrossesMammoth Creek
Location9 Miles Sw. of Hatch
RouteCounty Highway 0
CountyGarfield County
StateUtah
Coordinates37.61028, -112.5575
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length70 ft (21.3 m)
Longest span67 ft (20.4 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic63 (2010)
Projected traffic77 by 2030
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 Mammoth Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is County Road over Mammoth 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 July 2024.

How much traffic does County Road over Mammoth Creek carry?

About 63 vehicles per day (2010 count), of which roughly 1% are trucks.

How long is County Road over Mammoth Creek?

The structure is 70 ft (21.3 m) long with a longest span of 67 ft (20.4 m) and a deck 28 ft wide.

Who owns County Road over Mammoth Creek?

It is owned by the County Highway Agency.