US Bridges

County Road over Mammoth Creek

FairPosted for load

Garfield County, Utah · 8 Miles So.Panguitch Lake · Structure no. 017041C

Built
1988
37 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
19
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 1988, so it is 37 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 19 vehicles a day, roughly 2% of them trucks, projected to reach 23 by 2030. The structure is 30 ft (9.1 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesCounty Road
CrossesMammoth Creek
Location8 Miles So.Panguitch Lake
RouteCounty Highway 0
CountyGarfield County
StateUtah
Coordinates37.62669, -112.65056
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating14.3 US tons
Inventory rating10.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width16 ft (4.9 m)
Roadway width13 ft (4 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic19 (2010)
Projected traffic23 by 2030
Trucks2%
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 Mammoth Creek built?

It was built in 1988, making it 37 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 19 vehicles per day (2010 count), of which roughly 2% are trucks.

How long is County Road over Mammoth Creek?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 16 ft wide.

Who owns County Road over Mammoth Creek?

It is owned by the County Highway Agency.