US Bridges

River RD over Rock Creek

Good

Washington County, Oregon · 00.1 East Rood Br Road · Structure no. 20970 000 00000

Built
2009
16 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
183 ft
1 main span
Daily traffic
10,661
2020 count
Owner
County
County Highway Agency

About this bridge

River RD over Rock Creek is a prestressed concrete stringer/multi-beam or girder carrying River RD over Rock Creek in Washington County, Oregon. It was built in 2009, so it is 16 years old, younger 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 10,661 vehicles a day, roughly 10% of them trucks, projected to reach 11,758 by 2025. The structure is 183 ft (55.9 m) long and 53 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesRiver RD
CrossesRock Creek
Location00.1 East Rood Br Road
RouteCity Street C0000
StateOregon
Coordinates45.49774, -122.94943
Functional classUrban Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.8 US tons
Inventory rating63.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length183 ft (55.9 m)
Longest span183 ft (55.9 m)
Deck width53 ft (16.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,661 (2020)
Projected traffic11,758 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 River RD over Rock Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is River RD over Rock Creek 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 October 2024.

How much traffic does River RD over Rock Creek carry?

About 10,661 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is River RD over Rock Creek?

The structure is 183 ft (55.9 m) long with a longest span of 183 ft (55.9 m) and a deck 53 ft wide.

Who owns River RD over Rock Creek?

It is owned by the County Highway Agency.