US Bridges

US 26 (hwy 47) over Necanicum River

Good

Clatsop County, Oregon · 008 MI SE HWY 53 & 26 JCT · Structure no. 01812A047 01023

Built
1970
55 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
118 ft
1 main span
Daily traffic
6,074
2022 count
Owner
State
State Highway Agency

About this bridge

US 26 (hwy 47) over Necanicum River is a prestressed concrete stringer/multi-beam or girder carrying US 26 (hwy 47) over Necanicum River in Clatsop County, Oregon. It was built in 1970, so it is 55 years old, older 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 6,074 vehicles a day, roughly 10% of them trucks, projected to reach 8,000 by 2042. The structure is 118 ft (36 m) long and 60 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

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CarriesUS 26 (hwy 47)
CrossesNecanicum River
Location008 MI SE HWY 53 & 26 JCT
RouteU.S. Route 26
CountyClatsop County
StateOregon
Coordinates45.90672, -123.74466
Functional classRural Principal Arterial - Other

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
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 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 rating29.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length118 ft (36 m)
Longest span118 ft (36 m)
Deck width60 ft (18.2 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,074 (2022)
Projected traffic8,000 by 2042
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 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 US 26 (hwy 47) over Necanicum River built?

It was built in 1970, making it 55 years old in 2025.

What condition is US 26 (hwy 47) 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 US 26 (hwy 47) over Necanicum River carry?

About 6,074 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is US 26 (hwy 47) over Necanicum River?

The structure is 118 ft (36 m) long with a longest span of 118 ft (36 m) and a deck 60 ft wide.

Who owns US 26 (hwy 47) over Necanicum River?

It is owned by the State Highway Agency.