US Bridges

Marion Rd. SE over Sidney Ditch

PoorPosted for load

Marion County, Oregon · 00.2 South of Marion · Structure no. 47C13 035 00000

Built
1962
63 years old
Condition
Poor
inspected August 2024
Type
Slab
Wood or Timber
Length
40 ft
2 main spans
Daily traffic
3,245
2020 count
Owner
County
County Highway Agency

About this bridge

Marion Rd. SE over Sidney Ditch is a wood or timber slab carrying Marion Rd. SE over Sidney Ditch in Marion County, Oregon. It was built in 1962, so it is 63 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. Its operating status is: posted for load restriction.

It carries about 3,245 vehicles a day, roughly 7% of them trucks, projected to reach 3,645 by 2025. The structure is 40 ft (12.2 m) long and 25 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesMarion Rd. SE
CrossesSidney Ditch
Location00.2 South of Marion
RouteCounty Highway A0566
CountyMarion County
StateOregon
Coordinates44.73947, -122.94374
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.7 US tons
Inventory rating19.3 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 20
Structure length40 ft (12.2 m)
Longest span19 ft (5.8 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,245 (2020)
Projected traffic3,645 by 2025
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$205,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Marion Rd. SE over Sidney Ditch built?

It was built in 1962, making it 63 years old in 2025.

What condition is Marion Rd. SE over Sidney 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 2024.

How much traffic does Marion Rd. SE over Sidney Ditch carry?

About 3,245 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Marion Rd. SE over Sidney Ditch?

The structure is 40 ft (12.2 m) long with a longest span of 19 ft (5.8 m) and a deck 25 ft wide.

Who owns Marion Rd. SE over Sidney Ditch?

It is owned by the County Highway Agency.