US Bridges

Conn 4 over HWY 61

FairPosted for load

Multnomah County, Oregon · 0.1 MI S of Morrison ST · Structure no. 09249 061C00113

Built
1968
57 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
191 ft
2 main spans
Daily traffic
2,600
2022 count
Owner
State
State Highway Agency

About this bridge

Conn 4 over HWY 61 is a concrete continuous box beam or girders - multiple carrying Conn 4 over HWY 61 in Multnomah County, Oregon. It was built in 1968, so it is 57 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 load restriction.

It carries about 2,600 vehicles a day, roughly 6% of them trucks, projected to reach 112,100 by 2036. The structure is 191 ft (58.2 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesConn 4
CrossesHWY 61
Location0.1 MI S of Morrison ST
RouteInterstate 405
CountyMultnomah County
StateOregon
Coordinates45.51946, -122.68661
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.
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating10.7 US tons
Inventory rating8.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length191 ft (58.2 m)
Longest span111 ft (33.9 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,600 (2022)
Projected traffic112,100 by 2036
Trucks6%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 4 over HWY 61 built?

It was built in 1968, making it 57 years old in 2025.

What condition is Conn 4 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 4 over HWY 61 carry?

About 2,600 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Conn 4 over HWY 61?

The structure is 191 ft (58.2 m) long with a longest span of 111 ft (33.9 m) and a deck 30 ft wide.

Who owns Conn 4 over HWY 61?

It is owned by the State Highway Agency.