US Bridges

I-5 (hwy 001) over I-5 @ Portland Ave

Fair

Douglas County, Oregon · 03.1 M N JCT HWY 035 · Structure no. 07670A001 12301

Built
1954
71 years old, rebuilt 1977
Condition
Fair
inspected February 2023
Type
Tee Beam
Concrete Continuous
Length
130 ft
3 main spans
Daily traffic
42,268
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 001) over I-5 @ Portland Ave is a concrete continuous tee beam carrying I-5 (hwy 001) over I-5 @ Portland Ave in Douglas County, Oregon. It was built in 1954 and reconstructed in 1977, so it is 71 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 42,268 vehicles a day, roughly 20% of them trucks, projected to reach 47,400 by 2042. The structure is 130 ft (39.6 m) long and 92 ft wide.

Location

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CarriesI-5 (hwy 001)
CrossesI-5 @ Portland Ave
Location03.1 M N JCT HWY 035
RouteInterstate 5
CountyDouglas County
StateOregon
Coordinates43.19881, -123.35961
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 inspectionFebruary 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 rating30.3 US tons
Inventory rating23.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length130 ft (39.6 m)
Longest span40 ft (12.2 m)
Deck width92 ft (27.9 m)
Roadway width86 ft (26.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,268 (2022)
Projected traffic47,400 by 2042
Trucks20%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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$676,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 (hwy 001) over I-5 @ Portland Ave built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1977.

What condition is I-5 (hwy 001) over I-5 @ Portland Ave 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 February 2023.

How much traffic does I-5 (hwy 001) over I-5 @ Portland Ave carry?

About 42,268 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is I-5 (hwy 001) over I-5 @ Portland Ave?

The structure is 130 ft (39.6 m) long with a longest span of 40 ft (12.2 m) and a deck 92 ft wide.

Who owns I-5 (hwy 001) over I-5 @ Portland Ave?

It is owned by the State Highway Agency.