US Bridges

NW Couch ST CO over HWY 61

Fair

Multnomah County, Oregon · 0.5 MI W Portland Cc · Structure no. 09278 061 00225

Built
1968
57 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
126 ft
2 main spans
Daily traffic
40,751
2020 count
Owner
State
State Highway Agency

About this bridge

NW Couch ST CO over HWY 61 is a concrete continuous box beam or girders - multiple carrying NW Couch ST CO over HWY 61 in Multnomah County, Oregon. It was built in 1968, so it is 57 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 40,751 vehicles a day, roughly 11% of them trucks, projected to reach 58,800 by 2040. The structure is 126 ft (38.4 m) long and 55 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNW Couch ST CO
CrossesHWY 61
Location0.5 MI W Portland Cc
RouteCity Street 405
CountyMultnomah County
StateOregon
Coordinates45.52361, -122.68637
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.5 US tons
Inventory rating25 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length126 ft (38.4 m)
Longest span64 ft (19.6 m)
Deck width55 ft (16.8 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,751 (2020)
Projected traffic58,800 by 2040
Trucks11%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 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 NW Couch ST CO over HWY 61 built?

It was built in 1968, making it 57 years old in 2025.

What condition is NW Couch ST CO 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 NW Couch ST CO over HWY 61 carry?

About 40,751 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is NW Couch ST CO over HWY 61?

The structure is 126 ft (38.4 m) long with a longest span of 64 ft (19.6 m) and a deck 55 ft wide.

Who owns NW Couch ST CO over HWY 61?

It is owned by the State Highway Agency.