US Bridges

HWY 064 Conn over Mt Scott Creek

Fair

Clackamas County, Oregon · 2.4 MI S of Portland Scl · Structure no. 17258 064C01423

Built
2003
22 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
427 ft
3 main spans
Daily traffic
19,910
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 064 Conn over Mt Scott Creek is a prestressed concrete continuous box beam or girders - multiple carrying HWY 064 Conn over Mt Scott Creek in Clackamas County, Oregon. It was built in 2003, so it is 22 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 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 19,910 vehicles a day, roughly 5% of them trucks, projected to reach 80,900 by 2040. The structure is 427 ft (130 m) long and 38 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesHWY 064 Conn
CrossesMt Scott Creek
Location2.4 MI S of Portland Scl
RouteCity Street 205
StateOregon
Coordinates45.42809, -122.56574
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating36 US tons
Inventory rating27.9 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length427 ft (130 m)
Longest span164 ft (50 m)
Deck width38 ft (11.6 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,910 (2022)
Projected traffic80,900 by 2040
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 Conn over Mt Scott Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is HWY 064 Conn over Mt Scott Creek 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 Conn over Mt Scott Creek carry?

About 19,910 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is HWY 064 Conn over Mt Scott Creek?

The structure is 427 ft (130 m) long with a longest span of 164 ft (50 m) and a deck 38 ft wide.

Who owns HWY 064 Conn over Mt Scott Creek?

It is owned by the State Highway Agency.