US Bridges

Gowydyville Road over S. Fk. Siuslaw River

Fair

Lane County, Oregon · 075 MI W Cottage Grove · Structure no. 39C249264500659

Built
1984
41 years old
Condition
Fair
inspected September 2024
Type
Slab
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
535
2020 count
Owner
County
County Highway Agency

About this bridge

Gowydyville Road over S. Fk. Siuslaw River is a prestressed concrete slab carrying Gowydyville Road over S. Fk. Siuslaw River in Lane County, Oregon. It was built in 1984, so it is 41 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 535 vehicles a day, roughly 10% of them trucks, projected to reach 625 by 2025. The structure is 59 ft (18 m) long and 28 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesGowydyville Road
CrossesS. Fk. Siuslaw River
Location075 MI W Cottage Grove
RouteCounty Highway C2645
CountyLane County
StateOregon
Coordinates43.78448, -123.18918
Functional classRural Minor 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 inspectionSeptember 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length59 ft (18 m)
Longest span57 ft (17.4 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic535 (2020)
Projected traffic625 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 Gowydyville Road over S. Fk. Siuslaw River built?

It was built in 1984, making it 41 years old in 2025.

What condition is Gowydyville Road over S. Fk. Siuslaw River 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 September 2024.

How much traffic does Gowydyville Road over S. Fk. Siuslaw River carry?

About 535 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Gowydyville Road over S. Fk. Siuslaw River?

The structure is 59 ft (18 m) long with a longest span of 57 ft (17.4 m) and a deck 28 ft wide.

Who owns Gowydyville Road over S. Fk. Siuslaw River?

It is owned by the County Highway Agency.