US Bridges

Tualatin-Sherwood over Rock Creek

Fair

Washington County, Oregon · MP 0.7 · Structure no. 24012 000 00007

Built
1990
35 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
15,717
2020 count
Owner
County
County Highway Agency

About this bridge

Tualatin-Sherwood over Rock Creek is a concrete culvert carrying Tualatin-Sherwood over Rock Creek in Washington County, Oregon. It was built in 1990, so it is 35 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. Its operating status is: open, posting recommended but not legally implemented.

It carries about 15,717 vehicles a day, roughly 3% of them trucks, projected to reach 17,334 by 2025. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesTualatin-Sherwood
CrossesRock Creek
LocationMP 0.7
RouteCounty Highway C0277
CountyWashington County
StateOregon
Coordinates45.36786, -122.82875
Functional classUrban 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
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, posting recommended but not legally implemented
ScourFoundations stable; scour above top of footing
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 rating31.9 US tons
Inventory rating24.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,717 (2020)
Projected traffic17,334 by 2025
Trucks3%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 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 Tualatin-Sherwood over Rock Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is Tualatin-Sherwood 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 July 2024.

How much traffic does Tualatin-Sherwood over Rock Creek carry?

About 15,717 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Tualatin-Sherwood over Rock Creek?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m).

Who owns Tualatin-Sherwood over Rock Creek?

It is owned by the County Highway Agency.