US Bridges

HWY 064 (I-205 Nb) over Prosperity Park RD

Fair

Clackamas County, Oregon · 1.1 MI S of Stafford RD · Structure no. 09740 064 00208

Built
1970
55 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
288 ft
3 main spans
Daily traffic
40,491
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 064 (I-205 Nb) over Prosperity Park RD is a concrete continuous box beam or girders - multiple carrying HWY 064 (I-205 Nb) over Prosperity Park 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 40,491 vehicles a day, roughly 8% of them trucks, projected to reach 55,700 by 2042. The structure is 288 ft (87.8 m) long and 63 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesHWY 064 (I-205 Nb)
CrossesProsperity Park RD
Location1.1 MI S of Stafford RD
RouteInterstate 205
CountyClackamas County
StateOregon
Coordinates45.37319, -122.72758
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.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.2 US tons
Inventory rating21.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length288 ft (87.8 m)
Longest span124 ft (37.8 m)
Deck width63 ft (19.1 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,491 (2022)
Projected traffic55,700 by 2042
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 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 Prosperity Park RD built?

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

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

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

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

The structure is 288 ft (87.8 m) long with a longest span of 124 ft (37.8 m) and a deck 63 ft wide.

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

It is owned by the State Highway Agency.