US Bridges

Co.Rd. Int.X-Road. over I-15 (SR-15) Nbl & S

Fair

Millard County, Utah · At Scipio Summit Intchg. · Structure no. 0C 642

Built
1978
47 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
248 ft
2 main spans
Daily traffic
32
2017 count
Owner
State
State Highway Agency

About this bridge

Co.Rd. Int.X-Road. over I-15 (SR-15) Nbl & S is a steel continuous stringer/multi-beam or girder carrying Co.Rd. Int.X-Road. over I-15 (SR-15) Nbl & S 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 32 vehicles a day, roughly 25% of them trucks, projected to reach 38 by 2037. The structure is 248 ft (75.5 m) long and 34 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesCo.Rd. Int.X-Road.
CrossesI-15 (SR-15) Nbl & S
LocationAt Scipio Summit Intchg.
RouteInterstate 15
CountyMillard County
StateUtah
Coordinates39.20244, -112.17325
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating24.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length248 ft (75.5 m)
Longest span127 ft (38.6 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32 (2017)
Projected traffic38 by 2037
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

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 Co.Rd. Int.X-Road. over I-15 (SR-15) Nbl & S built?

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

What condition is Co.Rd. Int.X-Road. over I-15 (SR-15) Nbl & S 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 Co.Rd. Int.X-Road. over I-15 (SR-15) Nbl & S carry?

About 32 vehicles per day (2017 count), of which roughly 25% are trucks.

How long is Co.Rd. Int.X-Road. over I-15 (SR-15) Nbl & S?

The structure is 248 ft (75.5 m) long with a longest span of 127 ft (38.6 m) and a deck 34 ft wide.

Who owns Co.Rd. Int.X-Road. over I-15 (SR-15) Nbl & S?

It is owned by the State Highway Agency.