US Bridges

SR-108 Syracuse RD over I-15 (SR-15) Nbl and Sbl

Fair

Davis County, Utah · Syracuse Rd.Int.In Layton · Structure no. 0F 171

Built
1967
58 years old, rebuilt 1982
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
300 ft
4 main spans
Daily traffic
58,441
2017 count
Owner
State
State Highway Agency

About this bridge

SR-108 Syracuse RD over I-15 (SR-15) Nbl and Sbl is a prestressed concrete continuous stringer/multi-beam or girder carrying SR-108 Syracuse RD over I-15 (SR-15) Nbl and Sbl in Davis County, Utah. It was built in 1967 and reconstructed in 1982, so it is 58 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 58,441 vehicles a day, roughly 9% of them trucks, projected to reach 70,129 by 2037. The structure is 300 ft (91.5 m) long and 92 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR-108 Syracuse RD
CrossesI-15 (SR-15) Nbl and Sbl
LocationSyracuse Rd.Int.In Layton
RouteState Highway 108
CountyDavis County
StateUtah
Coordinates41.08912, -111.99001
Functional classUrban Other Principal 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating5.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length300 ft (91.5 m)
Longest span90 ft (27.4 m)
Deck width92 ft (28 m)
Roadway width81 ft (24.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,441 (2017)
Projected traffic70,129 by 2037
Trucks9%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.7 mi (6 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 SR-108 Syracuse RD over I-15 (SR-15) Nbl and Sbl built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1982.

What condition is SR-108 Syracuse 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 May 2023.

How much traffic does SR-108 Syracuse RD over I-15 (SR-15) Nbl and Sbl carry?

About 58,441 vehicles per day (2017 count), of which roughly 9% are trucks.

How long is SR-108 Syracuse RD over I-15 (SR-15) Nbl and Sbl?

The structure is 300 ft (91.5 m) long with a longest span of 90 ft (27.4 m) and a deck 92 ft wide.

Who owns SR-108 Syracuse RD over I-15 (SR-15) Nbl and Sbl?

It is owned by the State Highway Agency.