US Bridges

Hawthorne Ave over Willamette River

Fair

Multnomah County, Oregon · Willamette River MP 13.2 · Structure no. 02757 000000000

Built
1910
115 years old, rebuilt 1997
Condition
Fair
inspected May 2023
Type
Movable - Lift
Steel
Length
1,383 ft
1 main span
Daily traffic
32,243
2020 count
Owner
County
County Highway Agency

About this bridge

Hawthorne Ave over Willamette River is a steel movable - lift carrying Hawthorne Ave over Willamette River in Multnomah County, Oregon. It was built in 1910 and reconstructed in 1997, so it is 115 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 32,243 vehicles a day, roughly 10% of them trucks, projected to reach 35,560 by 2025. The structure is 1,383 ft (421.5 m) long and 73 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesHawthorne Ave
CrossesWillamette River
LocationWillamette River MP 13.2
RouteCity Street 9366
CountyMultnomah County
StateOregon
Coordinates45.51321, -122.67095
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.5 US tons
Inventory rating21.8 US tons

Structure

Structure typeMovable - Lift
MaterialSteel
DeckOpen grating
Main spans1 (+5 approach)
Design loadRailroad
Structure length1,383 ft (421.5 m)
Longest span251 ft (76.5 m)
Deck width73 ft (22.3 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deck16 ft (4.8 m)

Traffic and service

Average daily traffic32,243 (2020)
Projected traffic35,560 by 2025
Trucks10%
Lanes on structure4
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$7.1 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Hawthorne Ave over Willamette River built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 1997.

What condition is Hawthorne Ave over Willamette River 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 May 2023.

How much traffic does Hawthorne Ave over Willamette River carry?

About 32,243 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Hawthorne Ave over Willamette River?

The structure is 1,383 ft (421.5 m) long with a longest span of 251 ft (76.5 m) and a deck 73 ft wide.

Who owns Hawthorne Ave over Willamette River?

It is owned by the County Highway Agency.