US Bridges

James Avenue over Silver Creek

Fair

Marion County, Oregon · 000SOUTH of Water/James I · Structure no. 47C200000000000

Built
1929
96 years old, rebuilt 1949
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
96 ft
3 main spans
Daily traffic
3,310
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

James Avenue over Silver Creek is a steel continuous stringer/multi-beam or girder carrying James Avenue over Silver Creek in Marion County, Oregon. It was built in 1929 and reconstructed in 1949, so it is 96 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 5 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 3,310 vehicles a day, roughly 2% of them trucks, projected to reach 3,641 by 2025. The structure is 96 ft (29.3 m) long and 36 ft wide.

Location

Open in Google Maps
CarriesJames Avenue
CrossesSilver Creek
Location000SOUTH of Water/James I
RouteCity Street 0
CountyMarion County
StateOregon
Coordinates45.00961, -122.79001
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating31.4 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length96 ft (29.3 m)
Longest span70 ft (21.3 m)
Deck width36 ft (11.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,310 (2020)
Projected traffic3,641 by 2025
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$492,000
NavigationNo navigation control on waterway

Frequently asked questions

When was James Avenue over Silver Creek built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1949.

What condition is James Avenue over Silver 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 August 2024.

How much traffic does James Avenue over Silver Creek carry?

About 3,310 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is James Avenue over Silver Creek?

The structure is 96 ft (29.3 m) long with a longest span of 70 ft (21.3 m) and a deck 36 ft wide.

Who owns James Avenue over Silver Creek?

It is owned by the City or Municipal Highway Agency.