US Bridges

Or 47 (hwy 102) over Nehalem River

Fair

Columbia County, Oregon · 1.0 MI S Vernonia · Structure no. 02598A102 06365

Built
1959
66 years old, rebuilt 1995
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
180 ft
1 main span
Daily traffic
3,196
2022 count
Owner
State
State Highway Agency

About this bridge

Or 47 (hwy 102) over Nehalem River is a steel stringer/multi-beam or girder carrying Or 47 (hwy 102) over Nehalem River in Columbia County, Oregon. It was built in 1959 and reconstructed in 1995, so it is 66 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 3,196 vehicles a day, roughly 10% of them trucks, projected to reach 3,800 by 2042. The structure is 180 ft (54.9 m) long and 43 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

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CarriesOr 47 (hwy 102)
CrossesNehalem River
Location1.0 MI S Vernonia
RouteState Highway 47
CountyColumbia County
StateOregon
Coordinates45.84351, -123.20285
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum 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
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span84 ft (25.6 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,196 (2022)
Projected traffic3,800 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18.6 mi (30 km)
TollOn a free road
National Highway SystemNo

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 Nehalem River built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1995.

What condition is Or 47 (hwy 102) over Nehalem River 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 May 2024.

How much traffic does Or 47 (hwy 102) over Nehalem River carry?

About 3,196 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Or 47 (hwy 102) over Nehalem River?

The structure is 180 ft (54.9 m) long with a longest span of 84 ft (25.6 m) and a deck 43 ft wide.

Who owns Or 47 (hwy 102) over Nehalem River?

It is owned by the State Highway Agency.