US Bridges

Driftwood Drive over Contra Costa Canal

Good

Contra Costa County, California · 0.25 MI SW Pacifica Ave · Structure no. 28C0478

Built
1994
31 years old
Condition
Good
inspected November 2024
Type
Slab
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
2,907
2013 count
Owner
County
County Highway Agency

About this bridge

Driftwood Drive over Contra Costa Canal is a prestressed concrete slab carrying Driftwood Drive over Contra Costa Canal in Contra Costa County, California. It was built in 1994, so it is 31 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 2,907 vehicles a day, roughly 5% of them trucks, projected to reach 3,071 by 2046. The structure is 41 ft (12.5 m) long and 56 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesDriftwood Drive
CrossesContra Costa Canal
Location0.25 MI SW Pacifica Ave
RouteCounty Highway 0
CountyContra Costa County
StateCalifornia
Coordinates38.0334, -121.97891
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 inspectionNovember 2024
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 adequacy8: Equal to present desirable 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 length41 ft (12.5 m)
Longest span38 ft (11.7 m)
Deck width56 ft (17.1 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,907 (2013)
Projected traffic3,071 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Driftwood Drive over Contra Costa Canal built?

It was built in 1994, making it 31 years old in 2025.

What condition is Driftwood Drive over Contra Costa Canal 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 November 2024.

How much traffic does Driftwood Drive over Contra Costa Canal carry?

About 2,907 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Driftwood Drive over Contra Costa Canal?

The structure is 41 ft (12.5 m) long with a longest span of 38 ft (11.7 m) and a deck 56 ft wide.

Who owns Driftwood Drive over Contra Costa Canal?

It is owned by the County Highway Agency.