US Bridges

Plagmann Drive over Oflow

Fair

Linn County, Oregon · 014 MI E CR 318 · Structure no. 12796 065200141

Built
1961
64 years old
Condition
Fair
inspected June 2023
Type
Slab
Prestressed Concrete
Length
60 ft
2 main spans
Daily traffic
21
2021 count
Owner
County
County Highway Agency

About this bridge

Plagmann Drive over Oflow is a prestressed concrete slab carrying Plagmann Drive over Oflow in Linn County, Oregon. It was built in 1961, so it is 64 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 21 vehicles a day, projected to reach 31 by 2041. The structure is 60 ft (18.3 m) long and 25 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesPlagmann Drive
CrossesOflow
Location014 MI E CR 318
RouteCounty Highway C0652
CountyLinn County
StateOregon
Coordinates44.6599, -122.94807
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 protection7 GoodSome minor problems.
Last inspectionJune 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 rating41.8 US tons
Inventory rating32.2 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span30 ft (9.1 m)
Deck width25 ft (7.5 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2021)
Projected traffic31 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed123.7 mi (199 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 Plagmann Drive over Oflow built?

It was built in 1961, making it 64 years old in 2025.

What condition is Plagmann Drive over Oflow 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 June 2023.

How much traffic does Plagmann Drive over Oflow carry?

About 21 vehicles per day (2021 count).

How long is Plagmann Drive over Oflow?

The structure is 60 ft (18.3 m) long with a longest span of 30 ft (9.1 m) and a deck 25 ft wide.

Who owns Plagmann Drive over Oflow?

It is owned by the County Highway Agency.