US Bridges

SR-12 over Boulder Creek

Fair

Garfield County, Utah · 2 Miles South of Boulder · Structure no. 0E1860

Built
1972
53 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
609
2017 count
Owner
State
State Highway Agency

About this bridge

SR-12 over Boulder Creek is a concrete culvert carrying SR-12 over Boulder Creek in Garfield County, Utah. It was built in 1972, so it is 53 years old, older 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 609 vehicles a day, roughly 20% of them trucks, projected to reach 731 by 2037. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSR-12
CrossesBoulder Creek
Location2 Miles South of Boulder
RouteState Highway 12
CountyGarfield County
StateUtah
Coordinates37.90101, -111.43663
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating79.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1 (+1 approach)
Design loadHS 20 + Mod
Structure length24 ft (7.3 m)
Longest span21 ft (6.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic609 (2017)
Projected traffic731 by 2037
Trucks20%
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

OwnerState Highway Agency
Maintained byState 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 SR-12 over Boulder Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is SR-12 over Boulder 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 April 2023.

How much traffic does SR-12 over Boulder Creek carry?

About 609 vehicles per day (2017 count), of which roughly 20% are trucks.

How long is SR-12 over Boulder Creek?

The structure is 24 ft (7.3 m) long with a longest span of 21 ft (6.5 m).

Who owns SR-12 over Boulder Creek?

It is owned by the State Highway Agency.