US Bridges

Roy Road over E Fk Dairy CR Oflow

Fair

Washington County, Oregon · 023 MI E HWY 47 · Structure no. 671298059800000

Built
1960
65 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
47 ft
3 main spans
Daily traffic
1,275
2020 count
Owner
County
County Highway Agency

About this bridge

Roy Road over E Fk Dairy CR Oflow is a wood or timber stringer/multi-beam or girder carrying Roy Road over E Fk Dairy CR Oflow 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 1,275 vehicles a day, roughly 10% of them trucks, projected to reach 1,345 by 2025. The structure is 47 ft (14.3 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
CrossesE Fk Dairy CR Oflow
Location023 MI E HWY 47
RouteCounty Highway C0248
CountyWashington County
StateOregon
Coordinates45.57894, -123.07172
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating23.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span15 ft (4.6 m)
Deck width20 ft (6.2 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,275 (2020)
Projected traffic1,345 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
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$241,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Roy Road over E Fk Dairy CR Oflow built?

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

What condition is Roy Road over E Fk Dairy CR Oflow 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 Roy Road over E Fk Dairy CR Oflow carry?

About 1,275 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Roy Road over E Fk Dairy CR Oflow?

The structure is 47 ft (14.3 m) long with a longest span of 15 ft (4.6 m) and a deck 20 ft wide.

Who owns Roy Road over E Fk Dairy CR Oflow?

It is owned by the County Highway Agency.