US Bridges

SR-105 -Int.X-Rd. over I-15 (SR-15) Nbl and Sbl

Fair

Davis County, Utah · Parrish Ln.Int.-Cntrvil. · Structure no. 0C 596

Built
1974
51 years old, rebuilt 2007
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
243 ft
2 main spans
Daily traffic
6,087
2021 count
Owner
State
State Highway Agency

About this bridge

SR-105 -Int.X-Rd. over I-15 (SR-15) Nbl and Sbl is a steel continuous stringer/multi-beam or girder carrying SR-105 -Int.X-Rd. over I-15 (SR-15) Nbl and Sbl in Davis County, Utah. It was built in 1974 and reconstructed in 2007, so it is 51 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 6,087 vehicles a day, roughly 12% of them trucks, projected to reach 7,304 by 2041. The structure is 243 ft (74.2 m) long and 75 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesSR-105 -Int.X-Rd.
CrossesI-15 (SR-15) Nbl and Sbl
LocationParrish Ln.Int.-Cntrvil.
RouteState Highway 105
CountyDavis County
StateUtah
Coordinates40.92152, -111.89094
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.6 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length243 ft (74.2 m)
Longest span126 ft (38.3 m)
Deck width75 ft (22.8 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,087 (2021)
Projected traffic7,304 by 2041
Trucks12%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.1 mi (5 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-105 -Int.X-Rd. over I-15 (SR-15) Nbl and Sbl built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2007.

What condition is SR-105 -Int.X-Rd. over I-15 (SR-15) Nbl and Sbl 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 June 2023.

How much traffic does SR-105 -Int.X-Rd. over I-15 (SR-15) Nbl and Sbl carry?

About 6,087 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is SR-105 -Int.X-Rd. over I-15 (SR-15) Nbl and Sbl?

The structure is 243 ft (74.2 m) long with a longest span of 126 ft (38.3 m) and a deck 75 ft wide.

Who owns SR-105 -Int.X-Rd. over I-15 (SR-15) Nbl and Sbl?

It is owned by the State Highway Agency.