US Bridges

Hy 91 SB to 1 SB over HWY 1 SB Off Ramp

Fair

Multnomah County, Oregon · 0.4 MI S of Taylors Ferry · Structure no. 08205R01WC00621

Built
1959
66 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete Continuous
Length
270 ft
6 main spans
Daily traffic
9,725
2022 count
Owner
State
State Highway Agency

About this bridge

Hy 91 SB to 1 SB over HWY 1 SB Off Ramp is a concrete continuous tee beam carrying Hy 91 SB to 1 SB over HWY 1 SB Off Ramp in Multnomah County, Oregon. It was built in 1959, so it is 66 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.

It carries about 9,725 vehicles a day, roughly 1% of them trucks, projected to reach 10,100 by 2030. The structure is 270 ft (82.3 m) long and 24 ft wide.

CarriesHy 91 SB to 1 SB
CrossesHWY 1 SB Off Ramp
Location0.4 MI S of Taylors Ferry
RouteState Highway 5
StateOregon
Coordinates45.45379, -122.72159
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.3 US tons
Inventory rating17.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadH 20
Structure length270 ft (82.3 m)
Longest span45 ft (13.7 m)
Deck width24 ft (7.3 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic9,725 (2022)
Projected traffic10,100 by 2030
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 Hy 91 SB to 1 SB over HWY 1 SB Off Ramp built?

It was built in 1959, making it 66 years old in 2025.

What condition is Hy 91 SB to 1 SB over HWY 1 SB Off Ramp 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 2024.

How much traffic does Hy 91 SB to 1 SB over HWY 1 SB Off Ramp carry?

About 9,725 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Hy 91 SB to 1 SB over HWY 1 SB Off Ramp?

The structure is 270 ft (82.3 m) long with a longest span of 45 ft (13.7 m) and a deck 24 ft wide.

Who owns Hy 91 SB to 1 SB over HWY 1 SB Off Ramp?

It is owned by the State Highway Agency.