US Bridges

NW Alexandra Ave over B-14 over Canyon

FairPosted for load

Multnomah County, Oregon · W End of NW Gordon ST · Structure no. 25B14 000

Built
1922
103 years old
Condition
Fair
inspected September 2024
Type
Arch - Deck
Concrete
Length
272 ft
1 main span
Daily traffic
137
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

NW Alexandra Ave over B-14 over Canyon is a concrete arch - deck carrying NW Alexandra Ave over B-14 over Canyon in Multnomah County, Oregon. It was built in 1922, so it is 103 years old, older 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: posted for load restriction.

It carries about 137 vehicles a day, roughly 1% of them trucks, projected to reach 151 by 2025. The structure is 272 ft (82.9 m) long and 23 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNW Alexandra Ave
CrossesB-14 over Canyon
LocationW End of NW Gordon ST
RouteCity Street C0000
CountyMultnomah County
StateOregon
Coordinates45.54072, -122.723
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating12.1 US tons
Inventory rating9.3 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+8 approach)
Design loadH 10
Structure length272 ft (82.9 m)
Longest span150 ft (45.7 m)
Deck width23 ft (6.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic137 (2020)
Projected traffic151 by 2025
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesRelief for waterway
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 statusEligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was NW Alexandra Ave over B-14 over Canyon built?

It was built in 1922, making it 103 years old in 2025.

What condition is NW Alexandra Ave over B-14 over Canyon 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 September 2024.

How much traffic does NW Alexandra Ave over B-14 over Canyon carry?

About 137 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is NW Alexandra Ave over B-14 over Canyon?

The structure is 272 ft (82.9 m) long with a longest span of 150 ft (45.7 m) and a deck 23 ft wide.

Who owns NW Alexandra Ave over B-14 over Canyon?

It is owned by the City or Municipal Highway Agency.