US Bridges

Roy Road over East Fork Dairy Creek

Fair

Washington County, Oregon · 024 MI E HWY 47 · Structure no. 671302059800240

Built
1960
65 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
81 ft
5 main spans
Daily traffic
1,238
2020 count
Owner
County
County Highway Agency

About this bridge

Roy Road over East Fork Dairy Creek is a wood or timber stringer/multi-beam or girder carrying Roy Road over East Fork Dairy Creek in Washington County, Oregon. It was built in 1960, so it is 65 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 1,238 vehicles a day, roughly 15% of them trucks, projected to reach 1,308 by 2025. The structure is 81 ft (24.7 m) long and 20 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesRoy Road
CrossesEast Fork Dairy Creek
Location024 MI E HWY 47
RouteCounty Highway C0248
CountyWashington County
StateOregon
Coordinates45.57868, -123.07104
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.8 US tons
Inventory rating25.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans5
Design loadHS 20
Structure length81 ft (24.7 m)
Longest span19 ft (5.8 m)
Deck width20 ft (6.2 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,238 (2020)
Projected traffic1,308 by 2025
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$415,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Roy Road over East Fork Dairy Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Roy Road over East Fork Dairy Creek 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 2023.

How much traffic does Roy Road over East Fork Dairy Creek carry?

About 1,238 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Roy Road over East Fork Dairy Creek?

The structure is 81 ft (24.7 m) long with a longest span of 19 ft (5.8 m) and a deck 20 ft wide.

Who owns Roy Road over East Fork Dairy Creek?

It is owned by the County Highway Agency.