US Bridges

US 26 (hwy 47) over Necanicum River

Fair

Clatsop County, Oregon · 044 MI SE Cannon Bch JCT · Structure no. 02601 047 00440

Built
1939
86 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete Continuous
Length
180 ft
4 main spans
Daily traffic
6,279
2022 count
Owner
State
State Highway Agency

About this bridge

US 26 (hwy 47) over Necanicum River is a concrete continuous tee beam carrying US 26 (hwy 47) over Necanicum River in Clatsop County, Oregon. It was built in 1939, so it is 86 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 6,279 vehicles a day, roughly 11% of them trucks, projected to reach 9,300 by 2042. The structure is 180 ft (54.9 m) long and 35 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

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CarriesUS 26 (hwy 47)
CrossesNecanicum River
Location044 MI SE Cannon Bch JCT
RouteU.S. Route 26
CountyClatsop County
StateOregon
Coordinates45.90219, -123.85974
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.2 US tons
Inventory rating17.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length180 ft (54.9 m)
Longest span50 ft (15.2 m)
Deck width35 ft (10.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,279 (2022)
Projected traffic9,300 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$922,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 26 (hwy 47) over Necanicum River built?

It was built in 1939, making it 86 years old in 2025.

What condition is US 26 (hwy 47) over Necanicum 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 2023.

How much traffic does US 26 (hwy 47) over Necanicum River carry?

About 6,279 vehicles per day (2022 count), of which roughly 11% are trucks.

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

The structure is 180 ft (54.9 m) long with a longest span of 50 ft (15.2 m) and a deck 35 ft wide.

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

It is owned by the State Highway Agency.