US Bridges

I-5 & Pacific Ave over Ostrander Creek

Fair

Cowlitz County, Washington · 3.5 N JCT SR 4 · Structure no. 002000980000000

Built
1965
60 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
28,965
2023 count
Owner
State
State Highway Agency

About this bridge

I-5 & Pacific Ave over Ostrander Creek is a concrete continuous culvert carrying I-5 & Pacific Ave over Ostrander Creek in Cowlitz County, Washington. It was built in 1965, so it is 60 years old, older than the Washington average of 49.8 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 28,965 vehicles a day, roughly 21% of them trucks, projected to reach 38,725 by 2039. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesI-5 & Pacific Ave
CrossesOstrander Creek
Location3.5 N JCT SR 4
RouteInterstate 5
CountyCowlitz County
StateWashington
Coordinates46.19467, -122.89372
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,965 (2023)
Projected traffic38,725 by 2039
Trucks21%
Lanes on structure8
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-5 & Pacific Ave over Ostrander Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is I-5 & Pacific Ave over Ostrander Creek 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 & Pacific Ave over Ostrander Creek carry?

About 28,965 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is I-5 & Pacific Ave over Ostrander Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns I-5 & Pacific Ave over Ostrander Creek?

It is owned by the State Highway Agency.