US Bridges

Broadway ST over Willamette River

Fair

Multnomah County, Oregon · Willamette River MP 11.7 · Structure no. 06757 000000000

Built
1912
113 years old, rebuilt 1927
Condition
Fair
inspected July 2023
Type
Movable - Bascule
Steel
Length
1,742 ft
1 main span
Daily traffic
30,871
2020 count
Owner
County
County Highway Agency

About this bridge

Broadway ST over Willamette River is a steel movable - bascule carrying Broadway ST over Willamette River in Multnomah County, Oregon. It was built in 1912 and reconstructed in 1927, so it is 113 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.

It carries about 30,871 vehicles a day, roughly 10% of them trucks, projected to reach 45,210 by 2025. The structure is 1,742 ft (531 m) long and 71 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesBroadway ST
CrossesWillamette River
LocationWillamette River MP 11.7
RouteCity Street 9300
CountyMultnomah County
StateOregon
Coordinates45.53155, -122.67469
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.2 US tons
Inventory rating21.8 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckOther
Main spans1 (+6 approach)
Design loadRailroad
Structure length1,742 ft (531 m)
Longest span304 ft (92.7 m)
Deck width71 ft (21.5 m)
Roadway width46 ft (13.9 m)
Vertical clearance over deck13 ft (4 m)

Traffic and service

Average daily traffic30,871 (2020)
Projected traffic45,210 by 2025
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway, waterway and railroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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$8.9 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Broadway ST over Willamette River built?

It was built in 1912, making it 113 years old in 2025. It was reconstructed in 1927.

What condition is Broadway ST 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 July 2023.

How much traffic does Broadway ST over Willamette River carry?

About 30,871 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Broadway ST over Willamette River?

The structure is 1,742 ft (531 m) long with a longest span of 304 ft (92.7 m) and a deck 71 ft wide.

Who owns Broadway ST over Willamette River?

It is owned by the County Highway Agency.