US Bridges

Gilkey Road over Ditch

Poor

Linn County, Oregon · 007 MI NW Crabtree · Structure no. 12801A007A00068

Built
1976
49 years old
Condition
Poor
inspected July 2024
Type
Slab
Prestressed Concrete
Length
45 ft
1 main span
Daily traffic
690
2021 count
Owner
County
County Highway Agency

About this bridge

Gilkey Road over Ditch is a prestressed concrete slab carrying Gilkey Road over Ditch in Linn County, Oregon. It was built in 1976, so it is 49 years old, younger 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 690 vehicles a day, roughly 15% of them trucks, projected to reach 968 by 2041. The structure is 45 ft (13.7 m) long and 36 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesGilkey Road
CrossesDitch
Location007 MI NW Crabtree
RouteCounty Highway A0496
CountyLinn County
StateOregon
Coordinates44.64764, -122.91632
Functional classRural Major Collector

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 inspectionJuly 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating29.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span44 ft (13.4 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic690 (2021)
Projected traffic968 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$299,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Gilkey Road over Ditch built?

It was built in 1976, making it 49 years old in 2025.

What condition is Gilkey Road over 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 July 2024.

How much traffic does Gilkey Road over Ditch carry?

About 690 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is Gilkey Road over Ditch?

The structure is 45 ft (13.7 m) long with a longest span of 44 ft (13.4 m) and a deck 36 ft wide.

Who owns Gilkey Road over Ditch?

It is owned by the County Highway Agency.