US Bridges

Foster RD over B-80A over Johnson Creek

Fair

Multnomah County, Oregon · At SE Barbara Welch Rd. · Structure no. 11086A000 00590

Built
1971
54 years old, rebuilt 2008
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
106 ft
1 main span
Daily traffic
16,018
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Foster RD over B-80A over Johnson Creek is a steel stringer/multi-beam or girder carrying Foster RD over B-80A over Johnson Creek in Multnomah County, Oregon. It was built in 1971 and reconstructed in 2008, so it is 54 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 16,018 vehicles a day, roughly 10% of them trucks, projected to reach 17,149 by 2025. The structure is 106 ft (32.3 m) long and 64 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesFoster RD
CrossesB-80A over Johnson Creek
LocationAt SE Barbara Welch Rd.
RouteCounty Highway 9776
CountyMultnomah County
StateOregon
Coordinates45.47724, -122.51336
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating30.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length106 ft (32.3 m)
Longest span100 ft (30.5 m)
Deck width64 ft (19.4 m)
Roadway width51 ft (15.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,018 (2020)
Projected traffic17,149 by 2025
Trucks10%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Foster RD over B-80A over Johnson Creek built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2008.

What condition is Foster RD over B-80A 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 July 2024.

How much traffic does Foster RD over B-80A over Johnson Creek carry?

About 16,018 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Foster RD over B-80A over Johnson Creek?

The structure is 106 ft (32.3 m) long with a longest span of 100 ft (30.5 m) and a deck 64 ft wide.

Who owns Foster RD over B-80A over Johnson Creek?

It is owned by the City or Municipal Highway Agency.