US Bridges

HWY 1W/GLISAN Ramp over Front Ave & UPRR

FairPosted for load

Multnomah County, Oregon · At NW End of Steel Br. · Structure no. 06683A01WX00031

Built
1950
75 years old, rebuilt 1985
Condition
Fair
inspected August 2023
Type
Girder and Floorbeam System
Steel
Length
505 ft
9 main spans
Daily traffic
2,630
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 1W/GLISAN Ramp over Front Ave & UPRR is a steel girder and floorbeam system carrying HWY 1W/GLISAN Ramp over Front Ave & UPRR in Multnomah County, Oregon. It was built in 1950 and reconstructed in 1985, 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 2,630 vehicles a day, roughly 3% of them trucks, projected to reach 9,801 by 2027. The structure is 505 ft (153.9 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY 1W/GLISAN Ramp
CrossesFront Ave & UPRR
LocationAt NW End of Steel Br.
RouteState Highway 99
CountyMultnomah County
StateOregon
Coordinates45.52682, -122.67173
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.4 US tons
Inventory rating21.1 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length505 ft (153.9 m)
Longest span102 ft (31.1 m)
Deck width56 ft (17.1 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,630 (2022)
Projected traffic9,801 by 2027
Trucks3%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$4.7 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY 1W/GLISAN Ramp over Front Ave & UPRR built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1985.

What condition is HWY 1W/GLISAN Ramp over Front Ave & UPRR 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 August 2023.

How much traffic does HWY 1W/GLISAN Ramp over Front Ave & UPRR carry?

About 2,630 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is HWY 1W/GLISAN Ramp over Front Ave & UPRR?

The structure is 505 ft (153.9 m) long with a longest span of 102 ft (31.1 m) and a deck 56 ft wide.

Who owns HWY 1W/GLISAN Ramp over Front Ave & UPRR?

It is owned by the State Highway Agency.