US Bridges

South Fork Road over South Fork Wilson River

Good

Tillamook County, Oregon · 18.3 M NW of Forest Grove · Structure no. 20996 000 00000

Built
2006
19 years old, rebuilt 2022
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
75 ft
1 main span
Daily traffic
80
2018 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

South Fork Road over South Fork Wilson River is a steel stringer/multi-beam or girder carrying South Fork Road over South Fork Wilson River in Tillamook County, Oregon. It was built in 2006 and reconstructed in 2022, so it is 19 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 80 vehicles a day, roughly 40% of them trucks, projected to reach 96 by 2038. The structure is 75 ft (22.9 m) long and 18 ft wide.

CarriesSouth Fork Road
CrossesSouth Fork Wilson River
Location18.3 M NW of Forest Grove
RouteState Lands Road 0
StateOregon
Coordinates45.60096, -123.46953
Functional classRural Local

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation8: Equal to present desirable criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.8 US tons
Inventory rating40 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span75 ft (22.9 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2018)
Projected traffic96 by 2038
Trucks40%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was South Fork Road over South Fork Wilson River built?

It was built in 2006, making it 19 years old in 2025. It was reconstructed in 2022.

What condition is South Fork Road over South Fork Wilson 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 July 2024.

How much traffic does South Fork Road over South Fork Wilson River carry?

About 80 vehicles per day (2018 count), of which roughly 40% are trucks.

How long is South Fork Road over South Fork Wilson River?

The structure is 75 ft (22.9 m) long with a longest span of 75 ft (22.9 m) and a deck 18 ft wide.

Who owns South Fork Road over South Fork Wilson River?

It is owned by the State Park, Forest, or Reservation Agency.