US Bridges

County Road over Twelve Mile Creek

Fair

Sanpete County, Utah · 3.5 Miles E. of Gunnison · Structure no. 039001F

Built
1985
40 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
31 ft
1 main span
Daily traffic
100
2010 count
Owner
County
County Highway Agency

About this bridge

County Road over Twelve Mile Creek is a prestressed concrete tee beam carrying County Road over Twelve Mile Creek in Sanpete County, Utah. It was built in 1985, so it is 40 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 5% of them trucks, projected to reach 125 by 2030. The structure is 31 ft (9.5 m) long and 28 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCounty Road
CrossesTwelve Mile Creek
Location3.5 Miles E. of Gunnison
RouteCounty Highway 0
CountySanpete County
StateUtah
Coordinates39.15683, -111.74828
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating21.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length31 ft (9.5 m)
Longest span29 ft (8.8 m)
Deck width28 ft (8.4 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2010)
Projected traffic125 by 2030
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Twelve Mile Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is County Road over Twelve Mile 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 March 2024.

How much traffic does County Road over Twelve Mile Creek carry?

About 100 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is County Road over Twelve Mile Creek?

The structure is 31 ft (9.5 m) long with a longest span of 29 ft (8.8 m) and a deck 28 ft wide.

Who owns County Road over Twelve Mile Creek?

It is owned by the County Highway Agency.