US Bridges

SW Capitol Highway over B-81 over SW Bertha Blvd

FairPosted for load

Multnomah County, Oregon · SW Portland · Structure no. 25T01 128 00025

Built
1915
110 years old, rebuilt 1929
Condition
Fair
inspected September 2024
Type
Girder and Floorbeam System
Concrete Continuous
Length
230 ft
7 main spans
Daily traffic
17,757
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

SW Capitol Highway over B-81 over SW Bertha Blvd is a concrete continuous girder and floorbeam system carrying SW Capitol Highway over B-81 over SW Bertha Blvd in Multnomah County, Oregon. It was built in 1915 and reconstructed in 1929, so it is 110 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. Its operating status is: posted for other load-capacity restriction.

It carries about 17,757 vehicles a day, roughly 1% of them trucks, projected to reach 25,024 by 2025. The structure is 230 ft (70.1 m) long and 38 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSW Capitol Highway
CrossesB-81 over SW Bertha Blvd
LocationSW Portland
RouteCounty Highway 9398
StateOregon
Coordinates45.47786, -122.69833
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadH 15
Structure length230 ft (70.1 m)
Longest span46 ft (14 m)
Deck width38 ft (11.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,757 (2020)
Projected traffic25,024 by 2025
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was SW Capitol Highway over B-81 over SW Bertha Blvd built?

It was built in 1915, making it 110 years old in 2025. It was reconstructed in 1929.

What condition is SW Capitol Highway over B-81 over SW Bertha Blvd 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 September 2024.

How much traffic does SW Capitol Highway over B-81 over SW Bertha Blvd carry?

About 17,757 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is SW Capitol Highway over B-81 over SW Bertha Blvd?

The structure is 230 ft (70.1 m) long with a longest span of 46 ft (14 m) and a deck 38 ft wide.

Who owns SW Capitol Highway over B-81 over SW Bertha Blvd?

It is owned by the City or Municipal Highway Agency.