US Bridges

Kirk Rd. over Ditch

Fair

Linn County, Oregon · 001 MI E I-5 · Structure no. 12517 050300012

Built
1964
61 years old
Condition
Fair
inspected May 2023
Type
Slab
Prestressed Concrete
Length
22 ft
1 main span
Daily traffic
57
2019 count
Owner
County
County Highway Agency

About this bridge

Kirk Rd. over Ditch is a prestressed concrete slab carrying Kirk Rd. over Ditch in Linn County, Oregon. It was built in 1964, so it is 61 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 57 vehicles a day, projected to reach 72 by 2039. The structure is 22 ft (6.7 m) long and 24 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesKirk Rd.
CrossesDitch
Location001 MI E I-5
RouteCounty Highway C0503
CountyLinn County
StateOregon
Coordinates44.36153, -123.05734
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.8 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span21 ft (6.4 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57 (2019)
Projected traffic72 by 2039
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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$146,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Kirk Rd. over Ditch built?

It was built in 1964, making it 61 years old in 2025.

What condition is Kirk Rd. over Ditch 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 May 2023.

How much traffic does Kirk Rd. over Ditch carry?

About 57 vehicles per day (2019 count).

How long is Kirk Rd. over Ditch?

The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.4 m) and a deck 24 ft wide.

Who owns Kirk Rd. over Ditch?

It is owned by the County Highway Agency.