US Bridges

Gibraltar Drive over Chabot Canal

Fair

Alameda County, California · 1500 Ft S of Owens · Structure no. 33C0463

Built
1984
41 years old
Condition
Fair
inspected October 2022
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
3,900
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Gibraltar Drive over Chabot Canal is a concrete continuous culvert carrying Gibraltar Drive over Chabot Canal in Alameda County, California. It was built in 1984, so it is 41 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 3,900 vehicles a day, roughly 2% of them trucks, projected to reach 14,772 by 2044. The structure is 27 ft (8.2 m) long and 99 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesGibraltar Drive
CrossesChabot Canal
Location1500 Ft S of Owens
RouteCity Street 0
CountyAlameda County
StateCalifornia
Coordinates37.69579, -121.9
Functional classUrban Collector

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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be 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 typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span12 ft (3.7 m)
Deck width99 ft (30.2 m)
Roadway width54 ft (16.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,900 (2023)
Projected traffic14,772 by 2044
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 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 Gibraltar Drive over Chabot Canal built?

It was built in 1984, making it 41 years old in 2025.

What condition is Gibraltar Drive over Chabot Canal 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 October 2022.

How much traffic does Gibraltar Drive over Chabot Canal carry?

About 3,900 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Gibraltar Drive over Chabot Canal?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m) and a deck 99 ft wide.

Who owns Gibraltar Drive over Chabot Canal?

It is owned by the City or Municipal Highway Agency.