US Bridges

Westport Ferry App over Westport Slough

Fair

Clatsop County, Oregon · 004 MI No Westport · Structure no. 22260 010600037

Built
2016
9 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
184 ft
1 main span
Daily traffic
296
2020 count
Owner
County
County Highway Agency

About this bridge

Westport Ferry App over Westport Slough is a steel stringer/multi-beam or girder carrying Westport Ferry App over Westport Slough in Clatsop County, Oregon. It was built in 2016, so it is 9 years old, younger 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 296 vehicles a day, roughly 10% of them trucks, projected to reach 341 by 2025. The structure is 184 ft (56.1 m) long and 17 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesWestport Ferry App
CrossesWestport Slough
Location004 MI No Westport
RouteCounty Highway A0737
CountyClatsop County
StateOregon
Coordinates46.13695, -123.37828
Functional classRural Major Collector

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckOpen grating
Main spans1 (+1 approach)
Design loadHL 93
Structure length184 ft (56.1 m)
Longest span94 ft (28.5 m)
Deck width17 ft (5.2 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic296 (2020)
Projected traffic341 by 2025
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Westport Ferry App over Westport Slough built?

It was built in 2016, making it 9 years old in 2025.

What condition is Westport Ferry App over Westport Slough 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 April 2024.

How much traffic does Westport Ferry App over Westport Slough carry?

About 296 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Westport Ferry App over Westport Slough?

The structure is 184 ft (56.1 m) long with a longest span of 94 ft (28.5 m) and a deck 17 ft wide.

Who owns Westport Ferry App over Westport Slough?

It is owned by the County Highway Agency.