US Bridges

Wyss Road over Trask River

Fair

Tillamook County, Oregon · 010 MI West of Tillamook · Structure no. 21964 000 00002

Built
2016
9 years old
Condition
Fair
inspected August 2024
Type
Slab
Prestressed Concrete
Length
119 ft
3 main spans
Daily traffic
38
2020 count
Owner
County
County Highway Agency

About this bridge

Wyss Road over Trask River is a prestressed concrete slab carrying Wyss Road over Trask River in Tillamook 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 38 vehicles a day, projected to reach 48 by 2025. The structure is 119 ft (36.4 m) long and 20 ft wide.

Location

Open in Google Maps
CarriesWyss Road
CrossesTrask River
Location010 MI West of Tillamook
RouteCounty Highway C0746
CountyTillamook County
StateOregon
Coordinates45.44844, -123.86605
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.7 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHL 93
Structure length119 ft (36.4 m)
Longest span58 ft (17.7 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38 (2020)
Projected traffic48 by 2025
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Wyss Road over Trask River built?

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

What condition is Wyss Road over Trask 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 August 2024.

How much traffic does Wyss Road over Trask River carry?

About 38 vehicles per day (2020 count).

How long is Wyss Road over Trask River?

The structure is 119 ft (36.4 m) long with a longest span of 58 ft (17.7 m) and a deck 20 ft wide.

Who owns Wyss Road over Trask River?

It is owned by the County Highway Agency.