US Bridges

SE Tacoma ST over B-56 over Johnson Creek

Fair

Multnomah County, Oregon · 2 Blks E of Mcloughlin · Structure no. 25B56 000 00001

Built
1934
91 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete
Length
28 ft
1 main span
Daily traffic
674
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

SE Tacoma ST over B-56 over Johnson Creek is a concrete culvert carrying SE Tacoma ST over B-56 over Johnson Creek in Multnomah County, Oregon. It was built in 1934, so it is 91 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 674 vehicles a day, roughly 5% of them trucks, projected to reach 744 by 2025. The structure is 28 ft (8.5 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSE Tacoma ST
CrossesB-56 over Johnson Creek
Location2 Blks E of Mcloughlin
RouteCity Street 9704
CountyMultnomah County
StateOregon
Coordinates45.46464, -122.63464
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating52.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 15
Structure length28 ft (8.5 m)
Longest span28 ft (8.5 m)
Deck width60 ft (18.3 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic674 (2020)
Projected traffic744 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SE Tacoma ST over B-56 over Johnson Creek built?

It was built in 1934, making it 91 years old in 2025.

What condition is SE Tacoma ST over B-56 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 August 2024.

How much traffic does SE Tacoma ST over B-56 over Johnson Creek carry?

About 674 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is SE Tacoma ST over B-56 over Johnson Creek?

The structure is 28 ft (8.5 m) long with a longest span of 28 ft (8.5 m) and a deck 60 ft wide.

Who owns SE Tacoma ST over B-56 over Johnson Creek?

It is owned by the City or Municipal Highway Agency.