US Bridges

HWY 91 NB over Front Ave to Steel Br

Fair

Multnomah County, Oregon · At W End of Steel Bridge · Structure no. 02733C01WX00014

Built
1950
75 years old
Condition
Fair
inspected November 2024
Type
Tee Beam
Concrete Continuous
Length
562 ft
10 main spans
Daily traffic
5,866
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 91 NB over Front Ave to Steel Br is a concrete continuous tee beam carrying HWY 91 NB over Front Ave to Steel Br 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.

It carries about 5,866 vehicles a day, roughly 10% of them trucks, projected to reach 6,150 by 2042. The structure is 562 ft (171.2 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY 91 NB
CrossesFront Ave to Steel Br
LocationAt W End of Steel Bridge
RouteState Highway 99
CountyMultnomah County
StateOregon
Coordinates45.52619, -122.67067
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
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 inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27 US tons
Inventory rating16 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans10 (+1 approach)
Design loadH 15
Structure length562 ft (171.2 m)
Longest span91 ft (27.8 m)
Deck width34 ft (10.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,866 (2022)
Projected traffic6,150 by 2042
Trucks10%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
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 statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.8 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY 91 NB over Front Ave to Steel Br built?

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

What condition is HWY 91 NB over Front Ave to Steel Br 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 November 2024.

How much traffic does HWY 91 NB over Front Ave to Steel Br carry?

About 5,866 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is HWY 91 NB over Front Ave to Steel Br?

The structure is 562 ft (171.2 m) long with a longest span of 91 ft (27.8 m) and a deck 34 ft wide.

Who owns HWY 91 NB over Front Ave to Steel Br?

It is owned by the State Highway Agency.