US Bridges

S. 1st Ave over Main Stayton Canal

Fair

Marion County, Oregon · In Stayton · Structure no. 05351A066 00025

Built
1965
60 years old
Condition
Fair
inspected August 2024
Type
Slab
Prestressed Concrete
Length
108 ft
3 main spans
Daily traffic
1,400
2018 count
Owner
County
County Highway Agency

About this bridge

S. 1st Ave over Main Stayton Canal is a prestressed concrete slab carrying S. 1st Ave over Main Stayton Canal in Marion 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 1,400 vehicles a day, roughly 15% of them trucks, projected to reach 1,600 by 2038. The structure is 108 ft (32.9 m) long and 42 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesS. 1st Ave
CrossesMain Stayton Canal
LocationIn Stayton
RouteCounty Highway C0066
CountyMarion County
StateOregon
Coordinates44.7952, -122.7944
Functional classUrban 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 protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25.4 US tons
Inventory rating19.6 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length108 ft (32.9 m)
Longest span34 ft (10.4 m)
Deck width42 ft (12.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2018)
Projected traffic1,600 by 2038
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$523,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S. 1st Ave over Main Stayton Canal built?

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

What condition is S. 1st Ave over Main Stayton Canal 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 2024.

How much traffic does S. 1st Ave over Main Stayton Canal carry?

About 1,400 vehicles per day (2018 count), of which roughly 15% are trucks.

How long is S. 1st Ave over Main Stayton Canal?

The structure is 108 ft (32.9 m) long with a longest span of 34 ft (10.4 m) and a deck 42 ft wide.

Who owns S. 1st Ave over Main Stayton Canal?

It is owned by the County Highway Agency.