US Bridges

I-405 (hwy 061) NB over City Streets

Fair

Multnomah County, Oregon · W Fremont Intrchge · Structure no. 09268N061 00284

Built
1972
53 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Steel Continuous
Length
2,367 ft
6 main spans
Daily traffic
51,625
2022 count
Owner
State
State Highway Agency

About this bridge

I-405 (hwy 061) NB over City Streets is a steel continuous box beam or girders - multiple carrying I-405 (hwy 061) NB over City Streets in Multnomah County, Oregon. It was built in 1972, so it is 53 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 51,625 vehicles a day, roughly 8% of them trucks, projected to reach 60,950 by 2042. The structure is 2,367 ft (721.5 m) long and 55 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI-405 (hwy 061) NB
CrossesCity Streets
LocationW Fremont Intrchge
RouteInterstate 405
CountyMultnomah County
StateOregon
Coordinates45.53261, -122.68699
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.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating10.4 US tons
Inventory rating7.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6 (+11 approach)
Design loadHS 20
Structure length2,367 ft (721.5 m)
Longest span191 ft (58.2 m)
Deck width55 ft (16.9 m)
Roadway width52 ft (15.9 m)
Vertical clearance over deck18 ft (5.6 m)

Traffic and service

Average daily traffic51,625 (2022)
Projected traffic60,950 by 2042
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-405 (hwy 061) NB over City Streets built?

It was built in 1972, making it 53 years old in 2025.

What condition is I-405 (hwy 061) NB over City Streets 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 I-405 (hwy 061) NB over City Streets carry?

About 51,625 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is I-405 (hwy 061) NB over City Streets?

The structure is 2,367 ft (721.5 m) long with a longest span of 191 ft (58.2 m) and a deck 55 ft wide.

Who owns I-405 (hwy 061) NB over City Streets?

It is owned by the State Highway Agency.