US Bridges

Trask Road over So Fork Palix River

Fair

Pacific County, Washington · 11.8 N JCT 4 & 101 · Structure no. 083593000000000

Built
1992
33 years old
Condition
Fair
inspected June 2024
Type
Channel Beam
Prestressed Concrete Continuous
Length
205 ft
4 main spans
Daily traffic
159
2023 count
Owner
County
County Highway Agency

About this bridge

Trask Road over So Fork Palix River is a prestressed concrete continuous channel beam carrying Trask Road over So Fork Palix River in Pacific County, Washington. It was built in 1992, so it is 33 years old, younger 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 159 vehicles a day, roughly 5% of them trucks, projected to reach 237 by 2043. The structure is 205 ft (62.5 m) long and 17 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesTrask Road
CrossesSo Fork Palix River
Location11.8 N JCT 4 & 101
RouteCounty Highway 40820
CountyPacific County
StateWashington
Coordinates46.58694, -123.91078
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 12 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
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 rating38 US tons
Inventory rating29 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length205 ft (62.5 m)
Longest span51 ft (15.5 m)
Deck width17 ft (5.1 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic159 (2023)
Projected traffic237 by 2043
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1.8 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Trask Road over So Fork Palix River built?

It was built in 1992, making it 33 years old in 2025.

What condition is Trask Road over So Fork Palix River 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 2024.

How much traffic does Trask Road over So Fork Palix River carry?

About 159 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Trask Road over So Fork Palix River?

The structure is 205 ft (62.5 m) long with a longest span of 51 ft (15.5 m) and a deck 17 ft wide.

Who owns Trask Road over So Fork Palix River?

It is owned by the County Highway Agency.