US Bridges

Trask River Road over Trask River(north Fork)

Fair

Tillamook County, Oregon · 11 MI E of Tillamook · Structure no. 11449A730 01185

Built
1984
41 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Prestressed Concrete
Length
182 ft
2 main spans
Daily traffic
509
2020 count
Owner
County
County Highway Agency

About this bridge

Trask River Road over Trask River(north Fork) is a prestressed concrete tee beam carrying Trask River Road over Trask River(north Fork) in Tillamook County, Oregon. It was built in 1984, so it is 41 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 509 vehicles a day, roughly 15% of them trucks, projected to reach 604 by 2025. The structure is 182 ft (55.5 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesTrask River Road
CrossesTrask River(north Fork)
Location11 MI E of Tillamook
RouteCounty Highway C0730
CountyTillamook County
StateOregon
Coordinates45.4401, -123.61035
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length182 ft (55.5 m)
Longest span120 ft (36.6 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic509 (2020)
Projected traffic604 by 2025
Trucks15%
Lanes on structure2
Traffic directionTwo-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 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 Trask River Road over Trask River(north Fork) built?

It was built in 1984, making it 41 years old in 2025.

What condition is Trask River Road over Trask River(north Fork) 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 2023.

How much traffic does Trask River Road over Trask River(north Fork) carry?

About 509 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Trask River Road over Trask River(north Fork)?

The structure is 182 ft (55.5 m) long with a longest span of 120 ft (36.6 m) and a deck 31 ft wide.

Who owns Trask River Road over Trask River(north Fork)?

It is owned by the County Highway Agency.