US Bridges

SW Mountainside over Unnamed Channel

Good

Washington County, Oregon · MP 0.27 · Structure no. 24368 000 00038

Built
2024
1 years old
Condition
Good
inspected August 2024
Type
Culvert
Steel
Length
21 ft
1 main span
Daily traffic
1,000
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

SW Mountainside over Unnamed Channel is a steel culvert carrying SW Mountainside over Unnamed Channel in Washington County, Oregon. It was built in 2024, so it is 1 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 1,000 vehicles a day, projected to reach 1,050 by 2034. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSW Mountainside
CrossesUnnamed Channel
LocationMP 0.27
RouteCity Street C0000
CountyWashington County
StateOregon
Coordinates45.42769, -122.86528
Functional classUrban 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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating36.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHL 93
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2024)
Projected traffic1,050 by 2034
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 SW Mountainside over Unnamed Channel built?

It was built in 2024, making it 1 years old in 2025.

What condition is SW Mountainside over Unnamed Channel 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 August 2024.

How much traffic does SW Mountainside over Unnamed Channel carry?

About 1,000 vehicles per day (2024 count).

How long is SW Mountainside over Unnamed Channel?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m).

Who owns SW Mountainside over Unnamed Channel?

It is owned by the City or Municipal Highway Agency.