US Bridges

HWY 001 over Willamette River

Fair

Multnomah County, Oregon · 1.1 MI S of Burnside Br · Structure no. 08328 001 30038

Built
1966
59 years old
Condition
Fair
inspected July 2023
Type
Truss - Deck
Steel
Length
1,044 ft
3 main spans
Daily traffic
140,648
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 001 over Willamette River is a steel truss - deck carrying HWY 001 over Willamette River in Multnomah County, Oregon. It was built in 1966, so it is 59 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 140,648 vehicles a day, roughly 10% of them trucks, projected to reach 147,800 by 2042. The structure is 1,044 ft (318.2 m) long and 115 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesHWY 001
CrossesWillamette River
Location1.1 MI S of Burnside Br
RouteInterstate 5
CountyMultnomah County
StateOregon
Coordinates45.50767, -122.66933
Functional classUrban Principal Arterial - Interstate

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating23.3 US tons

Structure

Structure typeTruss - Deck
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length1,044 ft (318.2 m)
Longest span440 ft (134.1 m)
Deck width115 ft (35.2 m)
Roadway width114 ft (34.8 m)
Vertical clearance over deck15 ft (4.7 m)

Traffic and service

Average daily traffic140,648 (2022)
Projected traffic147,800 by 2042
Trucks10%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was HWY 001 over Willamette River built?

It was built in 1966, making it 59 years old in 2025.

What condition is HWY 001 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 HWY 001 over Willamette River carry?

About 140,648 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is HWY 001 over Willamette River?

The structure is 1,044 ft (318.2 m) long with a longest span of 440 ft (134.1 m) and a deck 115 ft wide.

Who owns HWY 001 over Willamette River?

It is owned by the State Highway Agency.