US Bridges

County Road over Mammoth Creek

Fair

Garfield County, Utah · 8.5 Mi.So. Panguitch Lake · Structure no. 017046A

Built
1992
33 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
40 ft
1 main span
Daily traffic
32
2010 count
Owner
County
County Highway Agency

About this bridge

County Road over Mammoth Creek is a wood or timber stringer/multi-beam or girder carrying County Road over Mammoth Creek in Garfield County, Utah. It was built in 1992, so it is 33 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 32 vehicles a day, roughly 1% of them trucks, projected to reach 38 by 2030. The structure is 40 ft (12.2 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCounty Road
CrossesMammoth Creek
Location8.5 Mi.So. Panguitch Lake
RouteCounty Highway 0
CountyGarfield County
StateUtah
Coordinates37.62611, -112.63533
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating46.4 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span39 ft (11.8 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 traffic32 (2010)
Projected traffic38 by 2030
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
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 County Road over Mammoth Creek built?

It was built in 1992, making it 33 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 32 vehicles per day (2010 count), of which roughly 1% are trucks.

How long is County Road over Mammoth Creek?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.8 m) and a deck 28 ft wide.

Who owns County Road over Mammoth Creek?

It is owned by the County Highway Agency.