US Bridges

HWY 064 (I-205 Nb) over Blankenship RD

Fair

Clackamas County, Oregon · 3.3 MI S of Willamette R · Structure no. 09734 064 00584

Built
1970
55 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
136 ft
1 main span
Daily traffic
42,106
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 064 (I-205 Nb) over Blankenship RD is a prestressed concrete box beam or girders - multiple carrying HWY 064 (I-205 Nb) over Blankenship RD 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 42,106 vehicles a day, roughly 8% of them trucks, projected to reach 58,400 by 2042. The structure is 136 ft (41.5 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY 064 (I-205 Nb)
CrossesBlankenship RD
Location3.3 MI S of Willamette R
RouteInterstate 205
CountyClackamas County
StateOregon
Coordinates45.35173, -122.66123
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.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating28.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length136 ft (41.5 m)
Longest span136 ft (41.5 m)
Deck width44 ft (13.5 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,106 (2022)
Projected traffic58,400 by 2042
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY 064 (I-205 Nb) over Blankenship RD built?

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

What condition is HWY 064 (I-205 Nb) over Blankenship RD 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 Blankenship RD carry?

About 42,106 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is HWY 064 (I-205 Nb) over Blankenship RD?

The structure is 136 ft (41.5 m) long with a longest span of 136 ft (41.5 m) and a deck 44 ft wide.

Who owns HWY 064 (I-205 Nb) over Blankenship RD?

It is owned by the State Highway Agency.