US Bridges

HWY 064 (I-205) over Columbia R./So. Channel

Fair

Multnomah County, Oregon · 1.25 MI S Ore-Wash Line · Structure no. 16188 064 02525

Built
1982
43 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
3,115 ft
17 main spans
Daily traffic
148,936
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 064 (I-205) over Columbia R./So. Channel is a prestressed concrete box beam or girders - multiple carrying HWY 064 (I-205) over Columbia R./So. Channel in Multnomah County, Oregon. It was built in 1982, so it is 43 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 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 148,936 vehicles a day, roughly 6% of them trucks, projected to reach 203,600 by 2042. The structure is 3,115 ft (949.5 m) long and 136 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesHWY 064 (I-205)
CrossesColumbia R./So. Channel
Location1.25 MI S Ore-Wash Line
RouteInterstate 205
StateOregon
Coordinates45.57681, -122.54481
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans17
Design loadHS 20
Structure length3,115 ft (949.5 m)
Longest span200 ft (61 m)
Deck width136 ft (41.5 m)
Roadway width126 ft (38.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic148,936 (2022)
Projected traffic203,600 by 2042
Trucks6%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed14.3 mi (23 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 proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was HWY 064 (I-205) over Columbia R./So. Channel built?

It was built in 1982, making it 43 years old in 2025.

What condition is HWY 064 (I-205) over Columbia R./So. Channel 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 August 2024.

How much traffic does HWY 064 (I-205) over Columbia R./So. Channel carry?

About 148,936 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is HWY 064 (I-205) over Columbia R./So. Channel?

The structure is 3,115 ft (949.5 m) long with a longest span of 200 ft (61 m) and a deck 136 ft wide.

Who owns HWY 064 (I-205) over Columbia R./So. Channel?

It is owned by the State Highway Agency.