US Bridges

SR 409 over Columbia R Puget Island

Fair

Wahkiakum County, Washington · 2.8 N Ferry Dock · Structure no. 0002377A0000000

Built
1938
87 years old, rebuilt 1987
Condition
Fair
inspected October 2023
Type
Truss - Thru
Steel
Length
2,615 ft
3 main spans
Daily traffic
1,973
2023 count
Owner
State
State Highway Agency

About this bridge

SR 409 over Columbia R Puget Island is a steel truss - thru carrying SR 409 over Columbia R Puget Island in Wahkiakum County, Washington. It was built in 1938 and reconstructed in 1987, so it is 87 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 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 1,973 vehicles a day, roughly 7% of them trucks, projected to reach 2,044 by 2039. The structure is 2,615 ft (797.1 m) long and 22 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesSR 409
CrossesColumbia R Puget Island
Location2.8 N Ferry Dock
RouteState Highway 409
CountyWahkiakum County
StateWashington
Coordinates46.19125, -123.38514
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44 US tons
Inventory rating24 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans3 (+15 approach)
Design loadH 15
Structure length2,615 ft (797.1 m)
Longest span420 ft (128 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deck16 ft (5 m)

Traffic and service

Average daily traffic1,973 (2023)
Projected traffic2,044 by 2039
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

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$32.3 million (2022 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR 409 over Columbia R Puget Island built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1987.

What condition is SR 409 over Columbia R Puget Island 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 October 2023.

How much traffic does SR 409 over Columbia R Puget Island carry?

About 1,973 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is SR 409 over Columbia R Puget Island?

The structure is 2,615 ft (797.1 m) long with a longest span of 420 ft (128 m) and a deck 22 ft wide.

Who owns SR 409 over Columbia R Puget Island?

It is owned by the State Highway Agency.