US Bridges

Marcola RD over Parsons Creek

Fair

Lane County, Oregon · 010 S Marcola · Structure no. 14683A190001185

Built
1978
47 years old
Condition
Fair
inspected August 2024
Type
Slab
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
5,859
2020 count
Owner
County
County Highway Agency

About this bridge

Marcola RD over Parsons Creek is a prestressed concrete slab carrying Marcola RD over Parsons Creek in Lane County, Oregon. It was built in 1978, so it is 47 years old, younger 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 5,859 vehicles a day, roughly 20% of them trucks, projected to reach 6,609 by 2025. The structure is 66 ft (20.1 m) long and 40 ft wide. If it were closed, the detour would be 62.1 mi (100 km).

Location

Open in Google Maps
CarriesMarcola RD
CrossesParsons Creek
Location010 S Marcola
RouteCounty Highway A0464
CountyLane County
StateOregon
Coordinates44.16916, -122.87669
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.8 US tons
Inventory rating25.4 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length66 ft (20.1 m)
Longest span65 ft (19.8 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,859 (2020)
Projected traffic6,609 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.1 mi (100 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 Marcola RD over Parsons Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Marcola RD over Parsons 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 Marcola RD over Parsons Creek carry?

About 5,859 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Marcola RD over Parsons Creek?

The structure is 66 ft (20.1 m) long with a longest span of 65 ft (19.8 m) and a deck 40 ft wide.

Who owns Marcola RD over Parsons Creek?

It is owned by the County Highway Agency.