US Bridges

N 4th Ave. over Main Stayton Canal

FairPosted for load

Marion County, Oregon · 020MI W JCT HWY22 & FA566 · Structure no. 47C103091600007

Built
1973
52 years old
Condition
Fair
inspected August 2024
Type
Slab
Wood or Timber
Length
44 ft
2 main spans
Daily traffic
430
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

N 4th Ave. over Main Stayton Canal is a wood or timber slab carrying N 4th Ave. over Main Stayton Canal in Marion County, Oregon. It was built in 1973, so it is 52 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. Its operating status is: posted for load restriction.

It carries about 430 vehicles a day, roughly 1% of them trucks, projected to reach 480 by 2025. The structure is 44 ft (13.4 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesN 4th Ave.
CrossesMain Stayton Canal
Location020MI W JCT HWY22 & FA566
RouteCity Street C0000
CountyMarion County
StateOregon
Coordinates44.79586, -122.79119
Functional classUrban 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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating16.4 US tons
Inventory rating12.5 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 20
Structure length44 ft (13.4 m)
Longest span22 ft (6.7 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic430 (2020)
Projected traffic480 by 2025
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N 4th Ave. over Main Stayton Canal built?

It was built in 1973, making it 52 years old in 2025.

What condition is N 4th 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 N 4th Ave. over Main Stayton Canal carry?

About 430 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is N 4th Ave. over Main Stayton Canal?

The structure is 44 ft (13.4 m) long with a longest span of 22 ft (6.7 m) and a deck 22 ft wide.

Who owns N 4th Ave. over Main Stayton Canal?

It is owned by the City or Municipal Highway Agency.