US Bridges

I-5 (hwy 1) FR RD over Santiam Overflow No. 1

Fair

Marion County, Oregon · 075 MI N of Albany Ncl · Structure no. 08363 001F24166

Built
1958
67 years old
Condition
Fair
inspected February 2023
Type
Tee Beam
Concrete Continuous
Length
117 ft
3 main spans
Daily traffic
116
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 1) FR RD over Santiam Overflow No. 1 is a concrete continuous tee beam carrying I-5 (hwy 1) FR RD over Santiam Overflow No. 1 in Marion County, Oregon. It was built in 1958, so it is 67 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 116 vehicles a day, roughly 14% of them trucks, projected to reach 780 by 2030. The structure is 117 ft (35.7 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI-5 (hwy 1) FR RD
CrossesSantiam Overflow No. 1
Location075 MI N of Albany Ncl
RouteInterstate 5
CountyMarion County
StateOregon
Coordinates44.75175, -123.05189
Functional classRural Local

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.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length117 ft (35.7 m)
Longest span39 ft (11.9 m)
Deck width25 ft (7.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic116 (2022)
Projected traffic780 by 2030
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed1.9 mi (3 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$599,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I-5 (hwy 1) FR RD over Santiam Overflow No. 1 built?

It was built in 1958, making it 67 years old in 2025.

What condition is I-5 (hwy 1) FR RD over Santiam Overflow No. 1 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) FR RD over Santiam Overflow No. 1 carry?

About 116 vehicles per day (2022 count), of which roughly 14% are trucks.

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

The structure is 117 ft (35.7 m) long with a longest span of 39 ft (11.9 m) and a deck 25 ft wide.

Who owns I-5 (hwy 1) FR RD over Santiam Overflow No. 1?

It is owned by the State Highway Agency.