US Bridges

Morrison ST over I-5 & or 99E

FairPosted for load

Multnomah County, Oregon · Between I-5 & SE Grand Av · Structure no. 08589 614 00005

Built
1955
70 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,549 ft
23 main spans
Daily traffic
37,316
2020 count
Owner
County
County Highway Agency

About this bridge

Morrison ST over I-5 & or 99E is a steel continuous stringer/multi-beam or girder carrying Morrison ST over I-5 & or 99E in Multnomah County, Oregon. It was built in 1955, so it is 70 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. Its operating status is: posted for load restriction.

It carries about 37,316 vehicles a day, roughly 10% of them trucks, projected to reach 41,155 by 2025. The structure is 1,549 ft (472 m) long and 49 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesMorrison ST
CrossesI-5 & or 99E
LocationBetween I-5 & SE Grand Av
RouteCity Street 25614
CountyMultnomah County
StateOregon
Coordinates45.51723, -122.66385
Functional classUrban Other Principal 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating8.3 US tons
Inventory rating6.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans23
Design loadH 20
Structure length1,549 ft (472 m)
Longest span134 ft (40.8 m)
Deck width49 ft (14.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic37,316 (2020)
Projected traffic41,155 by 2025
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and railroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$13.7 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Morrison ST over I-5 & or 99E built?

It was built in 1955, making it 70 years old in 2025.

What condition is Morrison ST over I-5 & or 99E 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 February 2025.

How much traffic does Morrison ST over I-5 & or 99E carry?

About 37,316 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Morrison ST over I-5 & or 99E?

The structure is 1,549 ft (472 m) long with a longest span of 134 ft (40.8 m) and a deck 49 ft wide.

Who owns Morrison ST over I-5 & or 99E?

It is owned by the County Highway Agency.