US Bridges

County Road over Mammoth Creek

Fair

Garfield County, Utah · 3.5 Miles Sw. of Hatch · Structure no. 017034C

Built
1994
31 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
48 ft
1 main span
Daily traffic
38
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 1994, so it is 31 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 38 vehicles a day, projected to reach 46 by 2030. The structure is 48 ft (14.5 m) long and 18 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesCounty Road
CrossesMammoth Creek
Location3.5 Miles Sw. of Hatch
RouteCounty Highway 0
CountyGarfield County
StateUtah
Coordinates37.62124, -112.4747
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42.9 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length48 ft (14.5 m)
Longest span44 ft (13.5 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.1 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic38 (2010)
Projected traffic46 by 2030
Trucks0%
Lanes on structure2
Traffic directionTwo-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 1994, making it 31 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 38 vehicles per day (2010 count).

How long is County Road over Mammoth Creek?

The structure is 48 ft (14.5 m) long with a longest span of 44 ft (13.5 m) and a deck 18 ft wide.

Who owns County Road over Mammoth Creek?

It is owned by the County Highway Agency.