US Bridges

West a ST over HWY 064

Fair

Clackamas County, Oregon · 0.5 MI S of Willamette · Structure no. 09704 064 00864

Built
1970
55 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
240 ft
2 main spans
Daily traffic
86,557
2020 count
Owner
State
State Highway Agency

About this bridge

West a ST over HWY 064 is a prestressed concrete continuous box beam or girders - multiple carrying West a ST over HWY 064 in Clackamas County, Oregon. It was built in 1970, so it is 55 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 86,557 vehicles a day, roughly 10% of them trucks, projected to reach 119,900 by 2040. The structure is 240 ft (73.2 m) long and 60 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesWest a ST
CrossesHWY 064
Location0.5 MI S of Willamette
RouteCity Street 0
StateOregon
Coordinates45.36144, -122.61279
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating43.2 US tons
Inventory rating33.2 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length240 ft (73.2 m)
Longest span120 ft (36.7 m)
Deck width60 ft (18.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic86,557 (2020)
Projected traffic119,900 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 West a ST over HWY 064 built?

It was built in 1970, making it 55 years old in 2025.

What condition is West a ST over HWY 064 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 March 2024.

How much traffic does West a ST over HWY 064 carry?

About 86,557 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is West a ST over HWY 064?

The structure is 240 ft (73.2 m) long with a longest span of 120 ft (36.7 m) and a deck 60 ft wide.

Who owns West a ST over HWY 064?

It is owned by the State Highway Agency.