US Bridges

Or 99W Ramp over B-153 N Interstate Ave

FairPosted for load

Multnomah County, Oregon · Btwn N Tillamook/Hancock · Structure no. 07115 01WX00106

Built
1950
75 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
1,011 ft
21 main spans
Daily traffic
4,654
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Or 99W Ramp over B-153 N Interstate Ave is a concrete continuous stringer/multi-beam or girder carrying Or 99W Ramp over B-153 N Interstate Ave in Multnomah County, Oregon. It was built in 1950, so it is 75 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 4,654 vehicles a day, roughly 3% of them trucks, projected to reach 5,100 by 2042. The structure is 1,011 ft (308.2 m) long and 35 ft wide.

Location

Open in Google Maps
CarriesOr 99W Ramp
CrossesB-153 N Interstate Ave
LocationBtwn N Tillamook/Hancock
RouteState Highway 99
CountyMultnomah County
StateOregon
Coordinates45.53731, -122.67481
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 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 geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating17.5 US tons
Inventory rating13.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans21
Design loadHS 20
Structure length1,011 ft (308.2 m)
Longest span63 ft (19.2 m)
Deck width35 ft (10.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck17 ft (5.1 m)

Traffic and service

Average daily traffic4,654 (2022)
Projected traffic5,100 by 2042
Trucks3%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed—
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$5.9 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Or 99W Ramp over B-153 N Interstate Ave built?

It was built in 1950, making it 75 years old in 2025.

What condition is Or 99W Ramp over B-153 N Interstate Ave 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 March 2023.

How much traffic does Or 99W Ramp over B-153 N Interstate Ave carry?

About 4,654 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Or 99W Ramp over B-153 N Interstate Ave?

The structure is 1,011 ft (308.2 m) long with a longest span of 63 ft (19.2 m) and a deck 35 ft wide.

Who owns Or 99W Ramp over B-153 N Interstate Ave?

It is owned by the City or Municipal Highway Agency.