US Bridges

Green Mountain RD over W.Fk.Dairy Creek

Fair

Washington County, Oregon · 001 MI N Sell Road · Structure no. 671373056900010

Built
1978
47 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
64 ft
1 main span
Daily traffic
450
2020 count
Owner
County
County Highway Agency

About this bridge

Green Mountain RD over W.Fk.Dairy Creek is a prestressed concrete slab carrying Green Mountain RD over W.Fk.Dairy Creek in Washington County, Oregon. It was built in 1978, so it is 47 years old, younger 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 450 vehicles a day, roughly 10% of them trucks, projected to reach 510 by 2025. The structure is 64 ft (19.5 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesGreen Mountain RD
CrossesW.Fk.Dairy Creek
Location001 MI N Sell Road
RouteCounty Highway C0016
CountyWashington County
StateOregon
Coordinates45.64958, -123.13403
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.
Superstructure8 Very GoodNo problems noted.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89 US tons
Inventory rating53 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadH 20
Structure length64 ft (19.5 m)
Longest span63 ft (19.2 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2020)
Projected traffic510 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Green Mountain RD over W.Fk.Dairy Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Green Mountain RD over W.Fk.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 Green Mountain RD over W.Fk.Dairy Creek carry?

About 450 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Green Mountain RD over W.Fk.Dairy Creek?

The structure is 64 ft (19.5 m) long with a longest span of 63 ft (19.2 m) and a deck 28 ft wide.

Who owns Green Mountain RD over W.Fk.Dairy Creek?

It is owned by the County Highway Agency.