US Bridges

N.Third Ave over Salem Ditch

Fair

Marion County, Oregon · 01 N of Ida Street · Structure no. 47B005000000000

Built
1970
55 years old
Condition
Fair
inspected August 2024
Type
Slab
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
3,725
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

N.Third Ave over Salem Ditch is a prestressed concrete slab carrying N.Third Ave over Salem Ditch in Marion County, Oregon. It was built in 1970, so it is 55 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 3,725 vehicles a day, roughly 10% of them trucks, projected to reach 4,153 by 2025. The structure is 30 ft (9.1 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesN.Third Ave
CrossesSalem Ditch
Location01 N of Ida Street
RouteCity Street C0000
CountyMarion County
StateOregon
Coordinates44.79807, -122.79224
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating37 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width61 ft (18.6 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,725 (2020)
Projected traffic4,153 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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.Third Ave over Salem Ditch built?

It was built in 1970, making it 55 years old in 2025.

What condition is N.Third Ave over Salem Ditch 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.Third Ave over Salem Ditch carry?

About 3,725 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is N.Third Ave over Salem Ditch?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 61 ft wide.

Who owns N.Third Ave over Salem Ditch?

It is owned by the City or Municipal Highway Agency.