US Bridges

Moon Lake over Twin Potts Creek

Good

Duchesne County, Utah · 9 MI N Mountain Home Ut · Structure no. 040103000021791

Built
2016
9 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Moon Lake over Twin Potts Creek is a steel stringer/multi-beam or girder carrying Moon Lake over Twin Potts Creek in Duchesne County, Utah. It was built in 2016, so it is 9 years old, younger than the Utah average of 40.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 35 ft (10.7 m) long and 24 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

CarriesMoon Lake
CrossesTwin Potts Creek
Location9 MI N Mountain Home Ut
RouteFederal Lands Road 10131
StateUtah
Coordinates40.52136, -110.44161
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating53.9 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length35 ft (10.7 m)
Longest span33 ft (10.2 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Moon Lake over Twin Potts Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is Moon Lake over Twin Potts Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does Moon Lake over Twin Potts Creek carry?

About 50 vehicles per day (latest count).

How long is Moon Lake over Twin Potts Creek?

The structure is 35 ft (10.7 m) long with a longest span of 33 ft (10.2 m) and a deck 24 ft wide.

Who owns Moon Lake over Twin Potts Creek?

It is owned by the U.S. Forest Service.