US Bridges

Wilco Road over Salem Ditch

Poor

Marion County, Oregon · 00.4 South of Shaff Road · Structure no. 47C95 969 00000

Built
1968
57 years old, rebuilt 1994
Condition
Poor
inspected August 2023
Type
Slab
Wood or Timber
Length
55 ft
3 main spans
Daily traffic
10,640
2020 count
Owner
County
County Highway Agency

About this bridge

Wilco Road over Salem Ditch is a wood or timber slab carrying Wilco Road over Salem Ditch in Marion County, Oregon. It was built in 1968 and reconstructed in 1994, so it is 57 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 10,640 vehicles a day, roughly 8% of them trucks, projected to reach 13,650 by 2025. The structure is 55 ft (16.8 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesWilco Road
CrossesSalem Ditch
Location00.4 South of Shaff Road
RouteCounty Highway A0572
CountyMarion County
StateOregon
Coordinates44.80059, -122.81487
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
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
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.7 US tons
Inventory rating35.4 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 20
Structure length55 ft (16.8 m)
Longest span18 ft (5.5 m)
Deck width35 ft (10.7 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,640 (2020)
Projected traffic13,650 by 2025
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Wilco Road over Salem Ditch built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1994.

What condition is Wilco Road over Salem Ditch in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2023.

How much traffic does Wilco Road over Salem Ditch carry?

About 10,640 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is Wilco Road over Salem Ditch?

The structure is 55 ft (16.8 m) long with a longest span of 18 ft (5.5 m) and a deck 35 ft wide.

Who owns Wilco Road over Salem Ditch?

It is owned by the County Highway Agency.