US Bridges

Or 53 (hwy 46) over Necanicum River

Good

Clatsop County, Oregon · At Necanicum JCT · Structure no. 20732 046 00011

Built
2010
15 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
83 ft
1 main span
Daily traffic
794
2022 count
Owner
State
State Highway Agency

About this bridge

Or 53 (hwy 46) over Necanicum River is a prestressed concrete box beam or girders - multiple carrying Or 53 (hwy 46) over Necanicum River in Clatsop County, Oregon. It was built in 2010, so it is 15 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 794 vehicles a day, roughly 24% of them trucks, projected to reach 830 by 2042. The structure is 83 ft (25.3 m) long and 36 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesOr 53 (hwy 46)
CrossesNecanicum River
LocationAt Necanicum JCT
RouteState Highway 53
CountyClatsop County
StateOregon
Coordinates45.9014, -123.7593
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.2 US tons
Inventory rating47.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length83 ft (25.3 m)
Longest span83 ft (25.3 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic794 (2022)
Projected traffic830 by 2042
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 53 (hwy 46) over Necanicum River built?

It was built in 2010, making it 15 years old in 2025.

What condition is Or 53 (hwy 46) over Necanicum River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does Or 53 (hwy 46) over Necanicum River carry?

About 794 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is Or 53 (hwy 46) over Necanicum River?

The structure is 83 ft (25.3 m) long with a longest span of 83 ft (25.3 m) and a deck 36 ft wide.

Who owns Or 53 (hwy 46) over Necanicum River?

It is owned by the State Highway Agency.