US Bridges

Ranch Dr. over Tributary of Courtney CR

Fair

Linn County, Oregon · 025 MI E CR 511 · Structure no. 12529 051000245

Built
1965
60 years old
Condition
Fair
inspected May 2023
Type
Slab
Prestressed Concrete
Length
24 ft
1 main span
Daily traffic
118
2021 count
Owner
County
County Highway Agency

About this bridge

Ranch Dr. over Tributary of Courtney CR is a prestressed concrete slab carrying Ranch Dr. over Tributary of Courtney CR in Linn 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 118 vehicles a day, roughly 10% of them trucks, projected to reach 165 by 2041. The structure is 24 ft (7.3 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesRanch Dr.
CrossesTributary of Courtney CR
Location025 MI E CR 511
RouteCounty Highway C0510
CountyLinn County
StateOregon
Coordinates44.34824, -122.98477
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating42.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span23 ft (7 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic118 (2021)
Projected traffic165 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ranch Dr. over Tributary of Courtney CR built?

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

What condition is Ranch Dr. over Tributary of Courtney CR 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 Ranch Dr. over Tributary of Courtney CR carry?

About 118 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Ranch Dr. over Tributary of Courtney CR?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m) and a deck 28 ft wide.

Who owns Ranch Dr. over Tributary of Courtney CR?

It is owned by the County Highway Agency.