US Bridges

Scappoose-Vernonia over N Fk Scappoose Creek

Fair

Columbia County, Oregon · 004 MI S JCT FASA745-A744 · Structure no. 13762A114301480

Built
1959
66 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
91 ft
3 main spans
Daily traffic
1,652
2020 count
Owner
County
County Highway Agency

About this bridge

Scappoose-Vernonia over N Fk Scappoose Creek is a concrete continuous slab carrying Scappoose-Vernonia over N Fk Scappoose Creek in Columbia County, Oregon. It was built in 1959, 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 1,652 vehicles a day, roughly 10% of them trucks, projected to reach 1,822 by 2025. The structure is 91 ft (27.7 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesScappoose-Vernonia
CrossesN Fk Scappoose Creek
Location004 MI S JCT FASA745-A744
RouteCounty Highway A0744
CountyColumbia County
StateOregon
Coordinates45.82195, -122.94632
Functional classRural Minor Arterial

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
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating30.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length91 ft (27.7 m)
Longest span34 ft (10.4 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,652 (2020)
Projected traffic1,822 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Scappoose-Vernonia over N Fk Scappoose Creek built?

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

What condition is Scappoose-Vernonia over N Fk Scappoose Creek 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 Scappoose-Vernonia over N Fk Scappoose Creek carry?

About 1,652 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Scappoose-Vernonia over N Fk Scappoose Creek?

The structure is 91 ft (27.7 m) long with a longest span of 34 ft (10.4 m) and a deck 31 ft wide.

Who owns Scappoose-Vernonia over N Fk Scappoose Creek?

It is owned by the County Highway Agency.