US Bridges

Windsor Road over Windsor Creek

Good

Sonoma County, California · At Vintage Greens Road · Structure no. 20C0540

Built
2005
20 years old
Condition
Good
inspected July 2021
Type
Slab
Prestressed Concrete
Length
69 ft
1 main span
Daily traffic
5,000
2013 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Windsor Road over Windsor Creek is a prestressed concrete slab carrying Windsor Road over Windsor Creek in Sonoma County, California. It was built in 2005, so it is 20 years old, younger than the California average of 54.8 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 5,000 vehicles a day, roughly 3% of them trucks, projected to reach 7,310 by 2038. The structure is 69 ft (21.1 m) long and 57 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesWindsor Road
CrossesWindsor Creek
LocationAt Vintage Greens Road
RouteCity Street 0
Coordinates38.53431, -122.81662
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 protection7 GoodSome minor problems.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length69 ft (21.1 m)
Longest span69 ft (21.1 m)
Deck width57 ft (17.5 m)
Roadway width45 ft (13.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2013)
Projected traffic7,310 by 2038
Trucks3%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Windsor Road over Windsor Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is Windsor Road over Windsor 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 July 2021.

How much traffic does Windsor Road over Windsor Creek carry?

About 5,000 vehicles per day (2013 count), of which roughly 3% are trucks.

How long is Windsor Road over Windsor Creek?

The structure is 69 ft (21.1 m) long with a longest span of 69 ft (21.1 m) and a deck 57 ft wide.

Who owns Windsor Road over Windsor Creek?

It is owned by the Town or Township Highway Agency.