US Bridges

I-15 (SR-15) Sbl over SR-103 W. Gate Hill Afb

Fair

Davis County, Utah · Hafb Intch (650 North) · Structure no. 3D 719

Built
1966
59 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete Continuous
Length
174 ft
3 main spans
Daily traffic
143,969
2023 count
Owner
State
State Highway Agency

About this bridge

I-15 (SR-15) Sbl over SR-103 W. Gate Hill Afb is a concrete continuous tee beam carrying I-15 (SR-15) Sbl over SR-103 W. Gate Hill Afb in Davis County, Utah. It was built in 1966, so it is 59 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 5 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 143,969 vehicles a day, roughly 32% of them trucks, projected to reach 172,763 by 2043. The structure is 174 ft (52.9 m) long and 55 ft wide.

Location

Open in Google Maps
CarriesI-15 (SR-15) Sbl
CrossesSR-103 W. Gate Hill Afb
LocationHafb Intch (650 North)
RouteInterstate 15
CountyDavis County
StateUtah
Coordinates41.12361, -112.02417
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating34 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length174 ft (52.9 m)
Longest span78 ft (23.9 m)
Deck width55 ft (16.8 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic143,969 (2023)
Projected traffic172,763 by 2043
Trucks32%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 SR-103 W. Gate Hill Afb built?

It was built in 1966, making it 59 years old in 2025.

What condition is I-15 (SR-15) Sbl over SR-103 W. Gate Hill Afb 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 I-15 (SR-15) Sbl over SR-103 W. Gate Hill Afb carry?

About 143,969 vehicles per day (2023 count), of which roughly 32% are trucks.

How long is I-15 (SR-15) Sbl over SR-103 W. Gate Hill Afb?

The structure is 174 ft (52.9 m) long with a longest span of 78 ft (23.9 m) and a deck 55 ft wide.

Who owns I-15 (SR-15) Sbl over SR-103 W. Gate Hill Afb?

It is owned by the State Highway Agency.