US Bridges

SW 4th Ave over HWY 61

Fair

Multnomah County, Oregon · 0.3 MI S of SW Park · Structure no. 09155 061 00088

Built
1964
61 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
263 ft
3 main spans
Daily traffic
65,460
2020 count
Owner
State
State Highway Agency

About this bridge

SW 4th Ave over HWY 61 is a concrete continuous box beam or girders - multiple carrying SW 4th Ave over HWY 61 in Multnomah County, Oregon. It was built in 1964, so it is 61 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 65,460 vehicles a day, roughly 11% of them trucks, projected to reach 95,500 by 2040. The structure is 263 ft (80.3 m) long and 51 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

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CarriesSW 4th Ave
CrossesHWY 61
Location0.3 MI S of SW Park
RouteCity Street 0
CountyMultnomah County
StateOregon
Coordinates45.50633, -122.68201
Functional classUrban Minor Arterial

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.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating34.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length263 ft (80.3 m)
Longest span111 ft (33.9 m)
Deck width51 ft (15.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic65,460 (2020)
Projected traffic95,500 by 2040
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed4.3 mi (7 km)
TollOn a free road
National Highway SystemNo

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 SW 4th Ave over HWY 61 built?

It was built in 1964, making it 61 years old in 2025.

What condition is SW 4th Ave over HWY 61 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 SW 4th Ave over HWY 61 carry?

About 65,460 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is SW 4th Ave over HWY 61?

The structure is 263 ft (80.3 m) long with a longest span of 111 ft (33.9 m) and a deck 51 ft wide.

Who owns SW 4th Ave over HWY 61?

It is owned by the State Highway Agency.