US Bridges

NE 138th Ave over B-086 X Columbia Slough

Good

Multnomah County, Oregon · 00.3 MI N of Sandy Blvd · Structure no. 18396 000000000

Built
2000
25 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
100 ft
1 main span
Daily traffic
10,129
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

NE 138th Ave over B-086 X Columbia Slough is a prestressed concrete stringer/multi-beam or girder carrying NE 138th Ave over B-086 X Columbia Slough in Multnomah County, Oregon. It was built in 2000, so it is 25 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10,129 vehicles a day, roughly 25% of them trucks, projected to reach 10,499 by 2025. The structure is 100 ft (30.5 m) long and 59 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNE 138th Ave
CrossesB-086 X Columbia Slough
Location00.3 MI N of Sandy Blvd
RouteCounty Highway C0000
StateOregon
Coordinates45.56001, -122.52113
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95 US tons
Inventory rating57 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length100 ft (30.5 m)
Longest span98 ft (29.9 m)
Deck width59 ft (18 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,129 (2020)
Projected traffic10,499 by 2025
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 NE 138th Ave over B-086 X Columbia Slough built?

It was built in 2000, making it 25 years old in 2025.

What condition is NE 138th Ave over B-086 X Columbia Slough 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 NE 138th Ave over B-086 X Columbia Slough carry?

About 10,129 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is NE 138th Ave over B-086 X Columbia Slough?

The structure is 100 ft (30.5 m) long with a longest span of 98 ft (29.9 m) and a deck 59 ft wide.

Who owns NE 138th Ave over B-086 X Columbia Slough?

It is owned by the City or Municipal Highway Agency.