US Bridges

Barmouth Drive over Contra Costa Canal

Good

Contra Costa County, California · 0.4 Mi. S.Of Davison RD · Structure no. 28C0501

Built
1985
40 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
94 ft
1 main span
Daily traffic
500
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Barmouth Drive over Contra Costa Canal is a prestressed concrete stringer/multi-beam or girder carrying Barmouth Drive over Contra Costa Canal in Contra Costa County, California. It was built in 1985, so it is 40 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 500 vehicles a day, roughly 1% of them trucks, projected to reach 734 by 2047. The structure is 94 ft (28.6 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesBarmouth Drive
CrossesContra Costa Canal
Location0.4 Mi. S.Of Davison RD
RouteCity Street 0
CountyContra Costa County
StateCalifornia
Coordinates37.98408, -121.79025
Functional classUrban Local

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 inspectionJanuary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
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 typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length94 ft (28.6 m)
Longest span90 ft (27.4 m)
Deck width52 ft (15.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2016)
Projected traffic734 by 2047
Trucks1%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Barmouth Drive over Contra Costa Canal built?

It was built in 1985, making it 40 years old in 2025.

What condition is Barmouth 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 January 2025.

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

About 500 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is Barmouth Drive over Contra Costa Canal?

The structure is 94 ft (28.6 m) long with a longest span of 90 ft (27.4 m) and a deck 52 ft wide.

Who owns Barmouth Drive over Contra Costa Canal?

It is owned by the City or Municipal Highway Agency.