US Bridges

Vernonia RD over Robinson Creek

Fair

Washington County, Oregon · 1.4 No. HWY 26/CO. 9 JCT · Structure no. 671417061200000

Built
1960
65 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
378
2020 count
Owner
County
County Highway Agency

About this bridge

Vernonia RD over Robinson Creek is a concrete culvert carrying Vernonia RD over Robinson Creek in Washington County, Oregon. It was built in 1960, so it is 65 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 5 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 378 vehicles a day, roughly 10% of them trucks, projected to reach 428 by 2025. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 30.4 mi (49 km).

Location

Open in Google Maps
CarriesVernonia RD
CrossesRobinson Creek
Location1.4 No. HWY 26/CO. 9 JCT
RouteCounty Highway A0690
CountyWashington County
StateOregon
Coordinates45.7646, -123.2767
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: 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 rating65.4 US tons
Inventory rating50.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic378 (2020)
Projected traffic428 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed30.4 mi (49 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Vernonia RD over Robinson Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Vernonia RD over Robinson 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 July 2024.

How much traffic does Vernonia RD over Robinson Creek carry?

About 378 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Vernonia RD over Robinson Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns Vernonia RD over Robinson Creek?

It is owned by the County Highway Agency.