US Bridges

Center Road over Vineyard Creek

Good

Marin County, California · At Wilmac Ct · Structure no. 27C0165

Built
2008
17 years old
Condition
Good
inspected August 2021
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
5,000
2016 count
Owner
County
County Highway Agency

About this bridge

Center Road over Vineyard Creek is a concrete slab carrying Center Road over Vineyard Creek in Marin County, California. It was built in 2008, so it is 17 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 5% of them trucks, projected to reach 6,328 by 2043. The structure is 27 ft (8.3 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCenter Road
CrossesVineyard Creek
LocationAt Wilmac Ct
RouteCity Street 0
Coordinates38.10779, -122.59175
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 protection8 Very GoodNo problems noted.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
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
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length27 ft (8.3 m)
Longest span25 ft (7.7 m)
Deck width55 ft (16.8 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2016)
Projected traffic6,328 by 2043
Trucks5%
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

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 Center Road over Vineyard Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is Center Road over Vineyard 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 August 2021.

How much traffic does Center Road over Vineyard Creek carry?

About 5,000 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Center Road over Vineyard Creek?

The structure is 27 ft (8.3 m) long with a longest span of 25 ft (7.7 m) and a deck 55 ft wide.

Who owns Center Road over Vineyard Creek?

It is owned by the County Highway Agency.