US Bridges

I-5 (hwy 001) over Elliot School Viaduct

Fair

Multnomah County, Oregon · 1.2 MI N of Burnside Br · Structure no. 08782A001 30265

Built
1963
62 years old, rebuilt 1985
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
505 ft
6 main spans
Daily traffic
110,680
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 001) over Elliot School Viaduct is a prestressed concrete stringer/multi-beam or girder carrying I-5 (hwy 001) over Elliot School Viaduct in Multnomah County, Oregon. It was built in 1963 and reconstructed in 1985, so it is 62 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 110,680 vehicles a day, roughly 8% of them trucks, projected to reach 116,200 by 2042. The structure is 505 ft (153.9 m) long and 113 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesI-5 (hwy 001)
CrossesElliot School Viaduct
Location1.2 MI N of Burnside Br
RouteInterstate 5
CountyMultnomah County
StateOregon
Coordinates45.53912, -122.67025
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 evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating21.8 US tons
Inventory rating16.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6 (+3 approach)
Design loadHS 20
Structure length505 ft (153.9 m)
Longest span68 ft (20.7 m)
Deck width113 ft (34.5 m)
Roadway width109 ft (33.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110,680 (2022)
Projected traffic116,200 by 2042
Trucks8%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
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 statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.6 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 (hwy 001) over Elliot School Viaduct built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1985.

What condition is I-5 (hwy 001) over Elliot School Viaduct 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 Elliot School Viaduct carry?

About 110,680 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is I-5 (hwy 001) over Elliot School Viaduct?

The structure is 505 ft (153.9 m) long with a longest span of 68 ft (20.7 m) and a deck 113 ft wide.

Who owns I-5 (hwy 001) over Elliot School Viaduct?

It is owned by the State Highway Agency.