US Bridges

HWY 064 NB over Clackamas River

Fair

Clackamas County, Oregon · 1.6 MI NE Oregon Cty Cc · Structure no. N8837B064 01072

Built
1962
63 years old, rebuilt 1986
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
578 ft
4 main spans
Daily traffic
62,210
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 064 NB over Clackamas River is a steel stringer/multi-beam or girder carrying HWY 064 NB over Clackamas River in Clackamas County, Oregon. It was built in 1962 and reconstructed in 1986, so it is 63 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 62,210 vehicles a day, roughly 8% of them trucks, projected to reach 73,400 by 2042. The structure is 578 ft (176.2 m) long and 65 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesHWY 064 NB
CrossesClackamas River
Location1.6 MI NE Oregon Cty Cc
RouteInterstate 205
CountyClackamas County
StateOregon
Coordinates45.3804, -122.5806
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25.4 US tons
Inventory rating19.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4 (+2 approach)
Design loadHS 20
Structure length578 ft (176.2 m)
Longest span127 ft (38.7 m)
Deck width65 ft (19.8 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62,210 (2022)
Projected traffic73,400 by 2042
Trucks8%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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 NB over Clackamas River built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1986.

What condition is HWY 064 NB over Clackamas 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 2023.

How much traffic does HWY 064 NB over Clackamas River carry?

About 62,210 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is HWY 064 NB over Clackamas River?

The structure is 578 ft (176.2 m) long with a longest span of 127 ft (38.7 m) and a deck 65 ft wide.

Who owns HWY 064 NB over Clackamas River?

It is owned by the State Highway Agency.