US Bridges

US-89 (SR-89) Sbl over I-15 (SR-15)

Fair

Davis County, Utah · Lagoon Interchange · Structure no. 3C 869

Built
2004
21 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
566 ft
3 main spans
Daily traffic
—
2023 count
Owner
State
State Highway Agency

About this bridge

US-89 (SR-89) Sbl over I-15 (SR-15) is a steel continuous stringer/multi-beam or girder carrying US-89 (SR-89) Sbl over I-15 (SR-15) in Davis County, Utah. It was built in 2004, so it is 21 years old, younger 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.

No traffic count is recorded. The structure is 566 ft (172.5 m) long and 54 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesUS-89 (SR-89) Sbl
CrossesI-15 (SR-15)
LocationLagoon Interchange
RouteU.S. Route 89
CountyDavis County
StateUtah
Coordinates40.98789, -111.90205
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating84.3 US tons
Inventory rating37.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length566 ft (172.5 m)
Longest span221 ft (67.3 m)
Deck width54 ft (16.6 m)
Roadway width51 ft (15.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic—
Trucks18%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 US-89 (SR-89) Sbl over I-15 (SR-15) built?

It was built in 2004, making it 21 years old in 2025.

What condition is US-89 (SR-89) Sbl over I-15 (SR-15) 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 US-89 (SR-89) Sbl over I-15 (SR-15) carry?

No traffic count is recorded for this structure.

How long is US-89 (SR-89) Sbl over I-15 (SR-15)?

The structure is 566 ft (172.5 m) long with a longest span of 221 ft (67.3 m) and a deck 54 ft wide.

Who owns US-89 (SR-89) Sbl over I-15 (SR-15)?

It is owned by the State Highway Agency.