US Bridges

I-5 (hwy 1) NB over Santiam Overflow No. 3

Fair

Marion County, Oregon · 6.9 MI N of Albany Ncl · Structure no. 17352 001 24112

Built
1994
31 years old
Condition
Fair
inspected February 2023
Type
Tee Beam
Concrete Continuous
Length
108 ft
3 main spans
Daily traffic
33,446
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 1) NB over Santiam Overflow No. 3 is a concrete continuous tee beam carrying I-5 (hwy 1) NB over Santiam Overflow No. 3 in Marion County, Oregon. It was built in 1994, so it is 31 years old, younger 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 33,446 vehicles a day, roughly 15% of them trucks, projected to reach 36,150 by 2042. The structure is 108 ft (32.9 m) long and 87 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI-5 (hwy 1) NB
CrossesSantiam Overflow No. 3
Location6.9 MI N of Albany Ncl
RouteInterstate 5
CountyMarion County
StateOregon
Coordinates44.74349, -123.05186
Functional classRural Principal Arterial - Interstate

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.5 US tons
Inventory rating20.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length108 ft (32.9 m)
Longest span36 ft (11 m)
Deck width87 ft (26.4 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,446 (2022)
Projected traffic36,150 by 2042
Trucks15%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-5 (hwy 1) NB over Santiam Overflow No. 3 built?

It was built in 1994, making it 31 years old in 2025.

What condition is I-5 (hwy 1) NB over Santiam Overflow No. 3 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 2023.

How much traffic does I-5 (hwy 1) NB over Santiam Overflow No. 3 carry?

About 33,446 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is I-5 (hwy 1) NB over Santiam Overflow No. 3?

The structure is 108 ft (32.9 m) long with a longest span of 36 ft (11 m) and a deck 87 ft wide.

Who owns I-5 (hwy 1) NB over Santiam Overflow No. 3?

It is owned by the State Highway Agency.