US Bridges

SW 12th ST over HWY 61

Fair

Multnomah County, Oregon · 0.2 MI S of Market ST · Structure no. 09255 061 00139

Built
1967
58 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
427 ft
5 main spans
Daily traffic
104,671
2020 count
Owner
State
State Highway Agency

About this bridge

SW 12th ST over HWY 61 is a concrete continuous box beam or girders - multiple carrying SW 12th ST over HWY 61 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 104,671 vehicles a day, roughly 11% of them trucks, projected to reach 142,400 by 2040. The structure is 427 ft (130 m) long and 41 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesSW 12th ST
CrossesHWY 61
Location0.2 MI S of Market ST
RouteCity Street 405
CountyMultnomah County
StateOregon
Coordinates45.51182, -122.68894
Functional classUrban Local

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 evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating12.1 US tons
Inventory rating9.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length427 ft (130 m)
Longest span102 ft (31.2 m)
Deck width41 ft (12.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic104,671 (2020)
Projected traffic142,400 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 12th ST over HWY 61 built?

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

What condition is SW 12th ST 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 12th ST over HWY 61 carry?

About 104,671 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is SW 12th ST over HWY 61?

The structure is 427 ft (130 m) long with a longest span of 102 ft (31.2 m) and a deck 41 ft wide.

Who owns SW 12th ST over HWY 61?

It is owned by the State Highway Agency.