US Bridges

Natalie Drive over Windsor Creek

Fair

Sonoma County, California · 200 Ft S of Jessica Drive · Structure no. 20C0577

Built
1988
37 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
3,000
2013 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Natalie Drive over Windsor Creek is a concrete continuous culvert carrying Natalie Drive over Windsor Creek in Sonoma County, California. It was built in 1988, so it is 37 years old, younger than the California average of 54.8 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 3,000 vehicles a day, roughly 3% of them trucks, projected to reach 4,122 by 2045. The structure is 25 ft (7.6 m) long and 53 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNatalie Drive
CrossesWindsor Creek
Location200 Ft S of Jessica Drive
RouteCity Street 0
CountySonoma County
StateCalifornia
Coordinates38.55598, -122.81034
Functional classUrban 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span12 ft (3.8 m)
Deck width53 ft (16.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2013)
Projected traffic4,122 by 2045
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Natalie Drive over Windsor Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Natalie Drive over Windsor 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 July 2023.

How much traffic does Natalie Drive over Windsor Creek carry?

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

How long is Natalie Drive over Windsor Creek?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.8 m) and a deck 53 ft wide.

Who owns Natalie Drive over Windsor Creek?

It is owned by the Town or Township Highway Agency.