US Bridges

Gowdyville Road over Silk Creek

Good

Lane County, Oregon · 012 MI W HWY 99 · Structure no. 39C247264500004

Built
1969
56 years old
Condition
Good
inspected September 2024
Type
Slab
Prestressed Concrete
Length
72 ft
3 main spans
Daily traffic
1,294
2020 count
Owner
County
County Highway Agency

About this bridge

Gowdyville Road over Silk Creek is a prestressed concrete slab carrying Gowdyville Road over Silk Creek in Lane County, Oregon. It was built in 1969, so it is 56 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,294 vehicles a day, roughly 10% of them trucks, projected to reach 1,419 by 2025. The structure is 72 ft (21.9 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesGowdyville Road
CrossesSilk Creek
Location012 MI W HWY 99
RouteCounty Highway C2645
StateOregon
Coordinates43.79609, -123.08253
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHS 20
Structure length72 ft (21.9 m)
Longest span28 ft (8.5 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,294 (2020)
Projected traffic1,419 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Gowdyville Road over Silk Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Gowdyville Road over Silk Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does Gowdyville Road over Silk Creek carry?

About 1,294 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Gowdyville Road over Silk Creek?

The structure is 72 ft (21.9 m) long with a longest span of 28 ft (8.5 m) and a deck 32 ft wide.

Who owns Gowdyville Road over Silk Creek?

It is owned by the County Highway Agency.