US Bridges

County Road over Mammoth Creek

Fair

Garfield County, Utah · 8.5 Mi.So. Panguitch Lake · Structure no. 017047A

Built
1992
33 years old
Condition
Fair
inspected July 2024
Type
Slab
Wood or Timber
Length
20 ft
1 main span
Daily traffic
100
2010 count
Owner
County
County Highway Agency

About this bridge

County Road over Mammoth Creek is a wood or timber slab 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 100 vehicles a day, roughly 1% of them trucks, projected to reach 125 by 2030. The structure is 20 ft (6.1 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Road
CrossesMammoth Creek
Location8.5 Mi.So. Panguitch Lake
RouteCounty Highway 0
CountyGarfield County
StateUtah
Coordinates37.62634, -112.63503
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.7 US tons
Inventory rating50 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span19 ft (5.7 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 traffic100 (2010)
Projected traffic125 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 100 vehicles per day (2010 count), of which roughly 1% are trucks.

How long is County Road over Mammoth Creek?

The structure is 20 ft (6.1 m) long with a longest span of 19 ft (5.7 m) and a deck 28 ft wide.

Who owns County Road over Mammoth Creek?

It is owned by the County Highway Agency.