US Bridges

Conn 6 over HWY 61

Fair

Multnomah County, Oregon · Broadway On-Ramp (sb) · Structure no. 09159 061C00078

Built
1964
61 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
260 ft
3 main spans
Daily traffic
3,549
2022 count
Owner
State
State Highway Agency

About this bridge

Conn 6 over HWY 61 is a concrete continuous box beam or girders - multiple carrying Conn 6 over HWY 61 in Multnomah County, Oregon. It was built in 1964, so it is 61 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 3,549 vehicles a day, roughly 6% of them trucks, projected to reach 90,200 by 2036. The structure is 260 ft (79.2 m) long and 27 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

CarriesConn 6
CrossesHWY 61
LocationBroadway On-Ramp (sb)
RouteState Highway 405
StateOregon
Coordinates45.50853, -122.6853
Functional classUrban Principal Arterial - Interstate

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.
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 evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.8 US tons
Inventory rating17.9 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length260 ft (79.2 m)
Longest span96 ft (29.2 m)
Deck width27 ft (8.2 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deck21 ft (6.5 m)

Traffic and service

Average daily traffic3,549 (2022)
Projected traffic90,200 by 2036
Trucks6%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed4.3 mi (7 km)
TollOn a free road
National Highway SystemYes

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 6 over HWY 61 built?

It was built in 1964, making it 61 years old in 2025.

What condition is Conn 6 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 6 over HWY 61 carry?

About 3,549 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Conn 6 over HWY 61?

The structure is 260 ft (79.2 m) long with a longest span of 96 ft (29.2 m) and a deck 27 ft wide.

Who owns Conn 6 over HWY 61?

It is owned by the State Highway Agency.