US Bridges

Stanley Ave over Johnson Creek

FairPosted for load

Clackamas County, Oregon · 700 Ft S Johnson CR Blvd · Structure no. 06455 033 00015

Built
1935
90 years old, rebuilt 1954
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
50 ft
2 main spans
Daily traffic
14,100
2018 count
Owner
County
County Highway Agency

About this bridge

Stanley Ave over Johnson Creek is a steel continuous stringer/multi-beam or girder carrying Stanley Ave over Johnson Creek in Clackamas County, Oregon. It was built in 1935 and reconstructed in 1954, so it is 90 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. Its operating status is: posted for load restriction.

It carries about 14,100 vehicles a day, roughly 4% of them trucks, projected to reach 14,200 by 2038. The structure is 50 ft (15.2 m) long and 25 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesStanley Ave
CrossesJohnson Creek
Location700 Ft S Johnson CR Blvd
RouteCounty Highway 9717
CountyClackamas County
StateOregon
Coordinates45.45594, -122.60458
Functional classUrban Collector

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 inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating15.8 US tons
Inventory rating12.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length50 ft (15.2 m)
Longest span25 ft (7.6 m)
Deck width25 ft (7.7 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,100 (2018)
Projected traffic14,200 by 2038
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$256,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Stanley Ave over Johnson Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1954.

What condition is Stanley Ave over Johnson 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 May 2024.

How much traffic does Stanley Ave over Johnson Creek carry?

About 14,100 vehicles per day (2018 count), of which roughly 4% are trucks.

How long is Stanley Ave over Johnson Creek?

The structure is 50 ft (15.2 m) long with a longest span of 25 ft (7.6 m) and a deck 25 ft wide.

Who owns Stanley Ave over Johnson Creek?

It is owned by the County Highway Agency.