US Bridges

I-5 Ramp over SW 4th Street.

Fair

Multnomah County, Oregon · 1.7 M S of Ross Isl. Br. · Structure no. 08199A001C29712

Built
1993
32 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
445 ft
3 main spans
Daily traffic
2,897
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 Ramp over SW 4th Street. is a prestressed concrete continuous box beam or girders - multiple carrying I-5 Ramp over SW 4th Street. in Multnomah County, Oregon. It was built in 1993, so it is 32 years old, younger 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 2,897 vehicles a day, roughly 1% of them trucks, projected to reach 4,000 by 2030. The structure is 445 ft (135.6 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesI-5 Ramp
CrossesSW 4th Street.
Location1.7 M S of Ross Isl. Br.
RouteInterstate 5
CountyMultnomah County
StateOregon
Coordinates45.46943, -122.68601
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
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 rating16.4 US tons
Inventory rating12.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length445 ft (135.6 m)
Longest span175 ft (53.3 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,897 (2022)
Projected traffic4,000 by 2030
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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-5 Ramp over SW 4th Street. built?

It was built in 1993, making it 32 years old in 2025.

What condition is I-5 Ramp over SW 4th Street. 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 January 2024.

How much traffic does I-5 Ramp over SW 4th Street. carry?

About 2,897 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is I-5 Ramp over SW 4th Street.?

The structure is 445 ft (135.6 m) long with a longest span of 175 ft (53.3 m) and a deck 29 ft wide.

Who owns I-5 Ramp over SW 4th Street.?

It is owned by the State Highway Agency.