US Bridges

I-15 (SR-15) Sbl over Co. Rd. W. from Kanosh

Fair

Millard County, Utah · 4.6 Mi.No.Kanosh Interchg · Structure no. 3F 258

Built
1973
52 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
192 ft
3 main spans
Daily traffic
16,820
2023 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Sbl over Co. Rd. W. from Kanosh is a prestressed concrete stringer/multi-beam or girder carrying I-15 (SR-15) Sbl over Co. Rd. W. from Kanosh in Millard County, Utah. It was built in 1973, so it is 52 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 16,820 vehicles a day, roughly 32% of them trucks, projected to reach 20,184 by 2043. The structure is 192 ft (58.6 m) long and 44 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI-15 (SR-15) Sbl
CrossesCo. Rd. W. from Kanosh
Location4.6 Mi.No.Kanosh Interchg
RouteInterstate 15
CountyMillard County
StateUtah
Coordinates38.81524, -112.49986
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 rating40.3 US tons
Inventory rating23.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length192 ft (58.6 m)
Longest span82 ft (25.1 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,820 (2023)
Projected traffic20,184 by 2043
Trucks32%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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) Sbl over Co. Rd. W. from Kanosh built?

It was built in 1973, making it 52 years old in 2025.

What condition is I-15 (SR-15) Sbl over Co. Rd. W. from Kanosh 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) Sbl over Co. Rd. W. from Kanosh carry?

About 16,820 vehicles per day (2023 count), of which roughly 32% are trucks.

How long is I-15 (SR-15) Sbl over Co. Rd. W. from Kanosh?

The structure is 192 ft (58.6 m) long with a longest span of 82 ft (25.1 m) and a deck 44 ft wide.

Who owns I-15 (SR-15) Sbl over Co. Rd. W. from Kanosh?

It is owned by the State Highway Agency.