US Bridges

Greenville Road over Dairy Creek

Fair

Washington County, Oregon · 014 MI W HWY 47 · Structure no. 671284015900140

Built
1964
61 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
71 ft
3 main spans
Daily traffic
914
2020 count
Owner
County
County Highway Agency

About this bridge

Greenville Road over Dairy Creek is a wood or timber stringer/multi-beam or girder carrying Greenville Road over Dairy Creek in Washington County, Oregon. It was built in 1964, so it is 61 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 914 vehicles a day, roughly 5% of them trucks, projected to reach 1,034 by 2025. The structure is 71 ft (21.6 m) long and 22 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesGreenville Road
CrossesDairy Creek
Location014 MI W HWY 47
RouteCounty Highway CA144
CountyWashington County
StateOregon
Coordinates45.59617, -123.14136
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
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 evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.9 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length71 ft (21.6 m)
Longest span23 ft (7 m)
Deck width22 ft (6.6 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic914 (2020)
Projected traffic1,034 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$364,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Greenville Road over Dairy Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is Greenville Road over 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 2024.

How much traffic does Greenville Road over Dairy Creek carry?

About 914 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Greenville Road over Dairy Creek?

The structure is 71 ft (21.6 m) long with a longest span of 23 ft (7 m) and a deck 22 ft wide.

Who owns Greenville Road over Dairy Creek?

It is owned by the County Highway Agency.