US Bridges

County RD 601 over North Santiam River

Fair

Linn County, Oregon · 0.25 MI South Stayton · Structure no. 06419A601 00001

Built
1965
60 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
802 ft
2 main spans
Daily traffic
7,519
2021 count
Owner
County
County Highway Agency

About this bridge

County RD 601 over North Santiam River is a steel continuous stringer/multi-beam or girder carrying County RD 601 over North Santiam River in Linn County, Oregon. It was built in 1965, so it is 60 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 7,519 vehicles a day, roughly 15% of them trucks, projected to reach 13,792 by 2041. The structure is 802 ft (244.4 m) long and 39 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesCounty RD 601
CrossesNorth Santiam River
Location0.25 MI South Stayton
RouteCounty Highway C0000
CountyLinn County
StateOregon
Coordinates44.79156, -122.79447
Functional classRural 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.2 US tons
Inventory rating21.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+6 approach)
Design loadHS 20
Structure length802 ft (244.4 m)
Longest span200 ft (61 m)
Deck width39 ft (11.9 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,519 (2021)
Projected traffic13,792 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 601 over North Santiam River built?

It was built in 1965, making it 60 years old in 2025.

What condition is County RD 601 over North Santiam River 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 County RD 601 over North Santiam River carry?

About 7,519 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is County RD 601 over North Santiam River?

The structure is 802 ft (244.4 m) long with a longest span of 200 ft (61 m) and a deck 39 ft wide.

Who owns County RD 601 over North Santiam River?

It is owned by the County Highway Agency.