US Bridges

Baseline RD over Rock Creek

Good

Washington County, Oregon · 001 MI E 231st Ave · Structure no. 19878 000 00000

Built
2005
20 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
108 ft
1 main span
Daily traffic
16,198
2020 count
Owner
County
County Highway Agency

About this bridge

Baseline RD over Rock Creek is a prestressed concrete stringer/multi-beam or girder carrying Baseline RD over Rock Creek in Washington County, Oregon. It was built in 2005, so it is 20 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 16,198 vehicles a day, roughly 5% of them trucks, projected to reach 16,948 by 2025. The structure is 108 ft (33 m) long and 90 ft wide.

CarriesBaseline RD
CrossesRock Creek
Location001 MI E 231st Ave
RouteCounty Highway C0223
StateOregon
Coordinates45.52038, -122.91312
Functional classRural Major Collector

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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 rating99 US tons
Inventory rating76.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length108 ft (33 m)
Longest span108 ft (33 m)
Deck width90 ft (27.4 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,198 (2020)
Projected traffic16,948 by 2025
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
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 Baseline RD over Rock Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is Baseline 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 July 2024.

How much traffic does Baseline RD over Rock Creek carry?

About 16,198 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Baseline RD over Rock Creek?

The structure is 108 ft (33 m) long with a longest span of 108 ft (33 m) and a deck 90 ft wide.

Who owns Baseline RD over Rock Creek?

It is owned by the County Highway Agency.