US Bridges

HWY 064 (I-205 Nb) over Tualatin River

Fair

Clackamas County, Oregon · 5.0 MI S of Willamette R · Structure no. 09737 064 00410

Built
1970
55 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
805 ft
6 main spans
Daily traffic
40,491
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 064 (I-205 Nb) over Tualatin River is a prestressed concrete continuous stringer/multi-beam or girder carrying HWY 064 (I-205 Nb) over Tualatin River 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 40,491 vehicles a day, roughly 8% of them trucks, projected to reach 55,700 by 2042. The structure is 805 ft (245.4 m) long and 44 ft wide. If it were closed, the detour would be 13.7 mi (22 km).

Location

Open in Google Maps
CarriesHWY 064 (I-205 Nb)
CrossesTualatin River
Location5.0 MI S of Willamette R
RouteInterstate 205
CountyClackamas County
StateOregon
Coordinates45.3663, -122.6872
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.1 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length805 ft (245.4 m)
Longest span140 ft (42.7 m)
Deck width44 ft (13.5 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,491 (2022)
Projected traffic55,700 by 2042
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13.7 mi (22 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY 064 (I-205 Nb) over Tualatin River built?

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

What condition is HWY 064 (I-205 Nb) over Tualatin River 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 HWY 064 (I-205 Nb) over Tualatin River carry?

About 40,491 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is HWY 064 (I-205 Nb) over Tualatin River?

The structure is 805 ft (245.4 m) long with a longest span of 140 ft (42.7 m) and a deck 44 ft wide.

Who owns HWY 064 (I-205 Nb) over Tualatin River?

It is owned by the State Highway Agency.