US Bridges

Columbia Blvd over B-78 over Bnrr

Poor

Multnomah County, Oregon · 2 Miles NW of Jct. I-5 · Structure no. 09685 000 00223

Built
1909
116 years old, rebuilt 1988
Condition
Poor
inspected July 2023
Type
Girder and Floorbeam System
Steel
Length
148 ft
2 main spans
Daily traffic
13,910
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Columbia Blvd over B-78 over Bnrr is a steel girder and floorbeam system carrying Columbia Blvd over B-78 over Bnrr in Multnomah County, Oregon. It was built in 1909 and reconstructed in 1988, so it is 116 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 13,910 vehicles a day, roughly 25% of them trucks, projected to reach 15,341 by 2025. The structure is 148 ft (45.1 m) long and 56 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesColumbia Blvd
CrossesB-78 over Bnrr
Location2 Miles NW of Jct. I-5
RouteCounty Highway 9956
CountyMultnomah County
StateOregon
Coordinates45.59439, -122.72589
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.2 US tons
Inventory rating25.7 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length148 ft (45.1 m)
Longest span77 ft (23.5 m)
Deck width56 ft (17.2 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,910 (2020)
Projected traffic15,341 by 2025
Trucks25%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$758,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Columbia Blvd over B-78 over Bnrr built?

It was built in 1909, making it 116 years old in 2025. It was reconstructed in 1988.

What condition is Columbia Blvd over B-78 over Bnrr in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.

How much traffic does Columbia Blvd over B-78 over Bnrr carry?

About 13,910 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is Columbia Blvd over B-78 over Bnrr?

The structure is 148 ft (45.1 m) long with a longest span of 77 ft (23.5 m) and a deck 56 ft wide.

Who owns Columbia Blvd over B-78 over Bnrr?

It is owned by the City or Municipal Highway Agency.