US Bridges

I-5 (hwy 1) NB over Labish Bottom

Fair

Marion County, Oregon · 008 MI N Salem Ncl · Structure no. 16086 001 26112

Built
1975
50 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
365 ft
15 main spans
Daily traffic
51,175
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 1) NB over Labish Bottom is a concrete continuous slab carrying I-5 (hwy 1) NB over Labish Bottom in Marion County, Oregon. It was built in 1975, so it is 50 years old, older than the Oregon average of 49.9 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 51,175 vehicles a day, roughly 13% of them trucks, projected to reach 54,900 by 2042. The structure is 365 ft (111.3 m) long and 60 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesI-5 (hwy 1) NB
CrossesLabish Bottom
Location008 MI N Salem Ncl
RouteInterstate 5
CountyMarion County
StateOregon
Coordinates45.01808, -122.98949
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.1 US tons
Inventory rating38 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans15
Design loadHS 20
Structure length365 ft (111.3 m)
Longest span25 ft (7.6 m)
Deck width60 ft (18.2 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51,175 (2022)
Projected traffic54,900 by 2042
Trucks13%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed6.2 mi (10 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-5 (hwy 1) NB over Labish Bottom built?

It was built in 1975, making it 50 years old in 2025.

What condition is I-5 (hwy 1) NB over Labish Bottom 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 August 2024.

How much traffic does I-5 (hwy 1) NB over Labish Bottom carry?

About 51,175 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is I-5 (hwy 1) NB over Labish Bottom?

The structure is 365 ft (111.3 m) long with a longest span of 25 ft (7.6 m) and a deck 60 ft wide.

Who owns I-5 (hwy 1) NB over Labish Bottom?

It is owned by the State Highway Agency.