US Bridges

Or 22 (hwy 162) over Slide Viaduct

Fair

Marion County, Oregon · 069 MI W Detroit · Structure no. 07817 162 04289

Built
1954
71 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete Continuous
Length
66 ft
3 main spans
Daily traffic
4,241
2022 count
Owner
State
State Highway Agency

About this bridge

Or 22 (hwy 162) over Slide Viaduct is a concrete continuous tee beam carrying Or 22 (hwy 162) over Slide Viaduct in Marion County, Oregon. It was built in 1954, so it is 71 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 4,241 vehicles a day, roughly 17% of them trucks, projected to reach 5,300 by 2042. The structure is 66 ft (20 m) long and 35 ft wide. If it were closed, the detour would be 34.2 mi (55 km).

Location

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CarriesOr 22 (hwy 162)
CrossesSlide Viaduct
Location069 MI W Detroit
RouteState Highway 22
CountyMarion County
StateOregon
Coordinates44.72265, -122.24681
Functional classRural Principal Arterial - Other

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.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating28.2 US tons
Inventory rating21.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length66 ft (20 m)
Longest span31 ft (9.4 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,241 (2022)
Projected traffic5,300 by 2042
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed34.2 mi (55 km)
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 Or 22 (hwy 162) over Slide Viaduct built?

It was built in 1954, making it 71 years old in 2025.

What condition is Or 22 (hwy 162) over Slide Viaduct 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 Or 22 (hwy 162) over Slide Viaduct carry?

About 4,241 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is Or 22 (hwy 162) over Slide Viaduct?

The structure is 66 ft (20 m) long with a longest span of 31 ft (9.4 m) and a deck 35 ft wide.

Who owns Or 22 (hwy 162) over Slide Viaduct?

It is owned by the State Highway Agency.