US Bridges

Trask River Road over So Fork Trask River

Good

Tillamook County, Oregon · 12.0 MI E of Tillamook · Structure no. 23273 730 01317

Built
2019
6 years old
Condition
Good
inspected June 2023
Type
Slab
Prestressed Concrete
Length
69 ft
1 main span
Daily traffic
154
2010 count
Owner
County
County Highway Agency

About this bridge

Trask River Road over So Fork Trask River is a prestressed concrete slab carrying Trask River Road over So Fork Trask River in Tillamook County, Oregon. It was built in 2019, so it is 6 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 154 vehicles a day, roughly 15% of them trucks, projected to reach 106 by 2030. The structure is 69 ft (21.1 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesTrask River Road
CrossesSo Fork Trask River
Location12.0 MI E of Tillamook
RouteCounty Highway C0730
StateOregon
Coordinates45.423, -123.60531
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating77.8 US tons
Inventory rating60 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length69 ft (21.1 m)
Longest span66 ft (20.2 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic154 (2010)
Projected traffic106 by 2030
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 So Fork Trask River built?

It was built in 2019, making it 6 years old in 2025.

What condition is Trask River Road over So Fork Trask River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

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

About 154 vehicles per day (2010 count), of which roughly 15% are trucks.

How long is Trask River Road over So Fork Trask River?

The structure is 69 ft (21.1 m) long with a longest span of 66 ft (20.2 m) and a deck 28 ft wide.

Who owns Trask River Road over So Fork Trask River?

It is owned by the County Highway Agency.