US Bridges

Mt Richmond RD over Tualatin River Oflow

Good

Washington County, Oregon · 0003 MI S Patton Valley · Structure no. 23975C120800016

Built
2020
5 years old
Condition
Good
inspected September 2024
Type
Culvert
Concrete
Length
34 ft
2 main spans
Daily traffic
305
2020 count
Owner
County
County Highway Agency

About this bridge

Mt Richmond RD over Tualatin River Oflow is a concrete culvert carrying Mt Richmond RD over Tualatin River Oflow in Washington County, Oregon. It was built in 2020, so it is 5 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 305 vehicles a day, roughly 5% of them trucks, projected to reach 345 by 2025. The structure is 34 ft (10.3 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMt Richmond RD
CrossesTualatin River Oflow
Location0003 MI S Patton Valley
RouteCounty Highway C1208
StateOregon
Coordinates45.43784, -123.20154
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating52.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length34 ft (10.3 m)
Longest span16 ft (5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic305 (2020)
Projected traffic345 by 2025
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed3.7 mi (6 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 Mt Richmond RD over Tualatin River Oflow built?

It was built in 2020, making it 5 years old in 2025.

What condition is Mt Richmond RD over Tualatin River Oflow 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 September 2024.

How much traffic does Mt Richmond RD over Tualatin River Oflow carry?

About 305 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Mt Richmond RD over Tualatin River Oflow?

The structure is 34 ft (10.3 m) long with a longest span of 16 ft (5 m).

Who owns Mt Richmond RD over Tualatin River Oflow?

It is owned by the County Highway Agency.