US Bridges

Wilson River Loop over Wilson River

Fair

Tillamook County, Oregon · 2.5 MI NE Tillamook · Structure no. 57C23 704 00001

Built
1974
51 years old
Condition
Fair
inspected August 2024
Type
Channel Beam
Prestressed Concrete
Length
272 ft
1 main span
Daily traffic
3,183
2020 count
Owner
County
County Highway Agency

About this bridge

Wilson River Loop over Wilson River is a prestressed concrete channel beam carrying Wilson River Loop over Wilson River in Tillamook County, Oregon. It was built in 1974, so it is 51 years old, older 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 3,183 vehicles a day, roughly 15% of them trucks, projected to reach 3,713 by 2025. The structure is 272 ft (82.9 m) long and 28 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesWilson River Loop
CrossesWilson River
Location2.5 MI NE Tillamook
RouteCounty Highway A0724
CountyTillamook County
StateOregon
Coordinates45.47732, -123.80755
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be 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 rating19.3 US tons
Inventory rating15 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1 (+6 approach)
Design loadHS 20
Structure length272 ft (82.9 m)
Longest span93 ft (28.3 m)
Deck width28 ft (8.5 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,183 (2020)
Projected traffic3,713 by 2025
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Wilson River Loop over Wilson River built?

It was built in 1974, making it 51 years old in 2025.

What condition is Wilson River Loop over Wilson 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 Wilson River Loop over Wilson River carry?

About 3,183 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Wilson River Loop over Wilson River?

The structure is 272 ft (82.9 m) long with a longest span of 93 ft (28.3 m) and a deck 28 ft wide.

Who owns Wilson River Loop over Wilson River?

It is owned by the County Highway Agency.