US Bridges

I-15 (SR-15)NB&SB over Scipio Valley Drainage

Fair

Millard County, Utah · 0.2 Miles South of Scipio · Structure no. 0E1966

Built
1978
47 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
14,385
2014 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15)NB&SB over Scipio Valley Drainage is a concrete continuous culvert carrying I-15 (SR-15)NB&SB over Scipio Valley Drainage in Millard County, Utah. It was built in 1978, so it is 47 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 14,385 vehicles a day, roughly 42% of them trucks, projected to reach 17,982 by 2034. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesI-15 (SR-15)NB&SB
CrossesScipio Valley Drainage
Location0.2 Miles South of Scipio
RouteInterstate 15
CountyMillard County
StateUtah
Coordinates39.23764, -112.13081
Functional classRural Principal Arterial - Interstate

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 inspectionFebruary 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 rating64.3 US tons
Inventory rating53.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,385 (2014)
Projected traffic17,982 by 2034
Trucks42%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-15 (SR-15)NB&SB over Scipio Valley Drainage built?

It was built in 1978, making it 47 years old in 2025.

What condition is I-15 (SR-15)NB&SB over Scipio Valley Drainage 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 February 2023.

How much traffic does I-15 (SR-15)NB&SB over Scipio Valley Drainage carry?

About 14,385 vehicles per day (2014 count), of which roughly 42% are trucks.

How long is I-15 (SR-15)NB&SB over Scipio Valley Drainage?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).

Who owns I-15 (SR-15)NB&SB over Scipio Valley Drainage?

It is owned by the State Highway Agency.