US Bridges

Or 47 (hwy 102) over Dairy Creek Overflow

Fair

Washington County, Oregon · 1.0 MI N Banks · Structure no. 20316 102 08194

Built
2006
19 years old
Condition
Fair
inspected October 2024
Type
Slab
Prestressed Concrete
Length
45 ft
1 main span
Daily traffic
3,693
2022 count
Owner
State
State Highway Agency

About this bridge

Or 47 (hwy 102) over Dairy Creek Overflow is a prestressed concrete slab carrying Or 47 (hwy 102) over Dairy Creek Overflow in Washington County, Oregon. It was built in 2006, so it is 19 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 3,693 vehicles a day, roughly 19% of them trucks, projected to reach 5,000 by 2042. The structure is 45 ft (13.6 m) long and 40 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesOr 47 (hwy 102)
CrossesDairy Creek Overflow
Location1.0 MI N Banks
RouteState Highway 47
StateOregon
Coordinates45.6328, -123.1245
Functional classRural Principal Arterial - Other

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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length45 ft (13.6 m)
Longest span45 ft (13.6 m)
Deck width40 ft (12.2 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,693 (2022)
Projected traffic5,000 by 2042
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Or 47 (hwy 102) over Dairy Creek Overflow built?

It was built in 2006, making it 19 years old in 2025.

What condition is Or 47 (hwy 102) over Dairy Creek Overflow 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 October 2024.

How much traffic does Or 47 (hwy 102) over Dairy Creek Overflow carry?

About 3,693 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is Or 47 (hwy 102) over Dairy Creek Overflow?

The structure is 45 ft (13.6 m) long with a longest span of 45 ft (13.6 m) and a deck 40 ft wide.

Who owns Or 47 (hwy 102) over Dairy Creek Overflow?

It is owned by the State Highway Agency.