US Bridges

Cordon RD #97 over Ditch

Good

Marion County, Oregon · 1.0 MI N Silverton RD · Structure no. 47C29 097 00202

Built
1965
60 years old
Condition
Good
inspected August 2024
Type
Slab
Wood or Timber
Length
25 ft
1 main span
Daily traffic
8,186
2020 count
Owner
County
County Highway Agency

About this bridge

Cordon RD #97 over Ditch is a wood or timber slab carrying Cordon RD #97 over Ditch in Marion County, Oregon. It was built in 1965, so it is 60 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,186 vehicles a day, roughly 3% of them trucks, projected to reach 8,936 by 2025. The structure is 25 ft (7.6 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCordon RD #97
CrossesDitch
Location1.0 MI N Silverton RD
RouteCounty Highway C0097
StateOregon
Coordinates44.98771, -122.95473
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 20
Structure length25 ft (7.6 m)
Longest span24 ft (7.3 m)
Deck width35 ft (10.8 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,186 (2020)
Projected traffic8,936 by 2025
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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 Cordon RD #97 over Ditch built?

It was built in 1965, making it 60 years old in 2025.

What condition is Cordon RD #97 over Ditch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does Cordon RD #97 over Ditch carry?

About 8,186 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Cordon RD #97 over Ditch?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 35 ft wide.

Who owns Cordon RD #97 over Ditch?

It is owned by the County Highway Agency.