US Bridges

Crosby RD over Senecal Creek

Fair

Marion County, Oregon · 1 MI N I-5 HWY 214 JCT · Structure no. 47C33 505

Built
1965
60 years old
Condition
Fair
inspected August 2024
Type
Slab
Wood or Timber
Length
33 ft
2 main spans
Daily traffic
1,709
2020 count
Owner
County
County Highway Agency

About this bridge

Crosby RD over Senecal Creek is a wood or timber slab carrying Crosby RD over Senecal Creek 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 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 1,709 vehicles a day, roughly 5% of them trucks, projected to reach 1,919 by 2025. The structure is 33 ft (10.1 m) long and 25 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCrosby RD
CrossesSenecal Creek
Location1 MI N I-5 HWY 214 JCT
RouteCounty Highway C0505
CountyMarion County
StateOregon
Coordinates45.16702, -122.87553
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating28.9 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span15 ft (4.6 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,709 (2020)
Projected traffic1,919 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$169,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Crosby RD over Senecal Creek built?

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

What condition is Crosby RD over Senecal Creek 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 Crosby RD over Senecal Creek carry?

About 1,709 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Crosby RD over Senecal Creek?

The structure is 33 ft (10.1 m) long with a longest span of 15 ft (4.6 m) and a deck 25 ft wide.

Who owns Crosby RD over Senecal Creek?

It is owned by the County Highway Agency.