US Bridges

US 26 (hwy 047) over Rock Creek

Fair

Washington County, Oregon · 11.1 MI W of Portland Cc · Structure no. 22339 047 06338

Built
2017
8 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
111 ft
1 main span
Daily traffic
110,950
2022 count
Owner
State
State Highway Agency

About this bridge

US 26 (hwy 047) over Rock Creek is a prestressed concrete stringer/multi-beam or girder carrying US 26 (hwy 047) over Rock Creek in Washington County, Oregon. It was built in 2017, so it is 8 years old, younger 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 110,950 vehicles a day, roughly 3% of them trucks, projected to reach 135,900 by 2042. The structure is 111 ft (33.8 m) long and 125 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesUS 26 (hwy 047)
CrossesRock Creek
Location11.1 MI W of Portland Cc
RouteU.S. Route 26
CountyWashington County
StateOregon
Coordinates45.54815, -122.88384
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.7 US tons
Inventory rating62.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length111 ft (33.8 m)
Longest span103 ft (31.4 m)
Deck width125 ft (38.2 m)
Roadway width120 ft (36.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110,950 (2022)
Projected traffic135,900 by 2042
Trucks3%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 047) over Rock Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is US 26 (hwy 047) over Rock 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 October 2024.

How much traffic does US 26 (hwy 047) over Rock Creek carry?

About 110,950 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is US 26 (hwy 047) over Rock Creek?

The structure is 111 ft (33.8 m) long with a longest span of 103 ft (31.4 m) and a deck 125 ft wide.

Who owns US 26 (hwy 047) over Rock Creek?

It is owned by the State Highway Agency.