US Bridges

I-405 (hwy 061) over HWY 47 Conn 1

Fair

Multnomah County, Oregon · 0.1 MI S of Jefferson ST · Structure no. 09254B061 00165

Built
1967
58 years old
Condition
Fair
inspected July 2023
Type
Frame
Concrete
Length
39 ft
1 main span
Daily traffic
102,242
2022 count
Owner
State
State Highway Agency

About this bridge

I-405 (hwy 061) over HWY 47 Conn 1 is a concrete frame carrying I-405 (hwy 061) over HWY 47 Conn 1 in Multnomah County, Oregon. It was built in 1967, so it is 58 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 102,242 vehicles a day, roughly 7% of them trucks, projected to reach 111,700 by 2042. The structure is 39 ft (12 m) long and 405 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesI-405 (hwy 061)
CrossesHWY 47 Conn 1
Location0.1 MI S of Jefferson ST
RouteInterstate 405
CountyMultnomah County
StateOregon
Coordinates45.51536, -122.68877
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.1 US tons
Inventory rating51.8 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length39 ft (12 m)
Longest span35 ft (10.7 m)
Deck width405 ft (123.4 m)
Roadway width102 ft (31.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic102,242 (2022)
Projected traffic111,700 by 2042
Trucks7%
Lanes on structure5
Traffic directionTwo-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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.1 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-405 (hwy 061) over HWY 47 Conn 1 built?

It was built in 1967, making it 58 years old in 2025.

What condition is I-405 (hwy 061) over HWY 47 Conn 1 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) over HWY 47 Conn 1 carry?

About 102,242 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is I-405 (hwy 061) over HWY 47 Conn 1?

The structure is 39 ft (12 m) long with a longest span of 35 ft (10.7 m) and a deck 405 ft wide.

Who owns I-405 (hwy 061) over HWY 47 Conn 1?

It is owned by the State Highway Agency.