US Bridges

Shaff Road over Salem Ditch

Fair

Marion County, Oregon · 00.3 West of Wilco Road · Structure no. 47C26 086 00000

Built
1966
59 years old
Condition
Fair
inspected August 2024
Type
Slab
Wood or Timber
Length
37 ft
2 main spans
Daily traffic
2,564
2020 count
Owner
County
County Highway Agency

About this bridge

Shaff Road over Salem Ditch is a wood or timber slab carrying Shaff Road over Salem Ditch in Marion County, Oregon. It was built in 1966, so it is 59 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 2,564 vehicles a day, roughly 4% of them trucks, projected to reach 2,884 by 2025. The structure is 37 ft (11.3 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesShaff Road
CrossesSalem Ditch
Location00.3 West of Wilco Road
RouteCounty Highway A0571
CountyMarion County
StateOregon
Coordinates44.80976, -122.8216
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.7 US tons
Inventory rating19 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 20
Structure length37 ft (11.3 m)
Longest span18 ft (5.5 m)
Deck width24 ft (7.2 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,564 (2020)
Projected traffic2,884 by 2025
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$190,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Shaff Road over Salem Ditch built?

It was built in 1966, making it 59 years old in 2025.

What condition is Shaff Road 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 Shaff Road over Salem Ditch carry?

About 2,564 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Shaff Road over Salem Ditch?

The structure is 37 ft (11.3 m) long with a longest span of 18 ft (5.5 m) and a deck 24 ft wide.

Who owns Shaff Road over Salem Ditch?

It is owned by the County Highway Agency.