US Bridges

Cedar Canyon Road over West Fork Dairy Creek

Fair

Washington County, Oregon · 0072 W HWY 47 · Structure no. 671290052300000

Built
1971
54 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
76 ft
3 main spans
Daily traffic
1,895
2020 count
Owner
County
County Highway Agency

About this bridge

Cedar Canyon Road over West Fork Dairy Creek is a prestressed concrete slab carrying Cedar Canyon Road over West Fork Dairy Creek in Washington County, Oregon. It was built in 1971, so it is 54 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 1,895 vehicles a day, roughly 5% of them trucks, projected to reach 2,145 by 2025. The structure is 76 ft (23.2 m) long and 28 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

CarriesCedar Canyon Road
CrossesWest Fork Dairy Creek
Location0072 W HWY 47
RouteCounty Highway C0064
StateOregon
Coordinates45.6218, -123.11612
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span25 ft (7.6 m)
Deck width28 ft (8.6 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,895 (2020)
Projected traffic2,145 by 2025
Trucks5%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Cedar Canyon Road over West Fork Dairy Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is Cedar Canyon Road over West 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 July 2024.

How much traffic does Cedar Canyon Road over West Fork Dairy Creek carry?

About 1,895 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Cedar Canyon Road over West Fork Dairy Creek?

The structure is 76 ft (23.2 m) long with a longest span of 25 ft (7.6 m) and a deck 28 ft wide.

Who owns Cedar Canyon Road over West Fork Dairy Creek?

It is owned by the County Highway Agency.