US Bridges

Conn 8 (sw 13th) over HWY 61

Fair

Multnomah County, Oregon · Sunset Interchange · Structure no. 09254G061C00114

Built
1967
58 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
178 ft
3 main spans
Daily traffic
7,881
2022 count
Owner
State
State Highway Agency

About this bridge

Conn 8 (sw 13th) over HWY 61 is a concrete continuous box beam or girders - multiple carrying Conn 8 (sw 13th) over HWY 61 in Multnomah County, Oregon. It was built in 1967, so it is 58 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 7,881 vehicles a day, roughly 6% of them trucks, projected to reach 9,900 by 2030. The structure is 178 ft (54.2 m) long and 36 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

CarriesConn 8 (sw 13th)
CrossesHWY 61
LocationSunset Interchange
RouteState Highway 405
StateOregon
Coordinates45.51399, -122.68942
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length178 ft (54.2 m)
Longest span72 ft (21.9 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,881 (2022)
Projected traffic9,900 by 2030
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed4.3 mi (7 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Conn 8 (sw 13th) over HWY 61 built?

It was built in 1967, making it 58 years old in 2025.

What condition is Conn 8 (sw 13th) over HWY 61 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 2023.

How much traffic does Conn 8 (sw 13th) over HWY 61 carry?

About 7,881 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Conn 8 (sw 13th) over HWY 61?

The structure is 178 ft (54.2 m) long with a longest span of 72 ft (21.9 m) and a deck 36 ft wide.

Who owns Conn 8 (sw 13th) over HWY 61?

It is owned by the State Highway Agency.