US Bridges

Park ST over Oakland Estuary

Fair

Alameda County, California · 0.2 MI S/W of I-880 · Structure no. 33C0027

Built
1934
91 years old
Condition
Fair
inspected April 2023
Type
Movable - Bascule
Steel
Length
433 ft
3 main spans
Daily traffic
41,000
2014 count
Owner
County
County Highway Agency

About this bridge

Park ST over Oakland Estuary is a steel movable - bascule carrying Park ST over Oakland Estuary in Alameda County, California. It was built in 1934, so it is 91 years old, older 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 41,000 vehicles a day, roughly 5% of them trucks, projected to reach 33,260 by 2041. The structure is 433 ft (132 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesPark ST
CrossesOakland Estuary
Location0.2 MI S/W of I-880
RouteCounty Highway 0
CountyAlameda County
StateCalifornia
Coordinates37.77116, -122.23687
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57.5 US tons
Inventory rating34.6 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckOpen grating
Main spans3 (+5 approach)
Design loadHS 20
Structure length433 ft (132 m)
Longest span288 ft (87.8 m)
Deck width48 ft (14.6 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deck13 ft (4.1 m)

Traffic and service

Average daily traffic41,000 (2014)
Projected traffic33,260 by 2041
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Park ST over Oakland Estuary built?

It was built in 1934, making it 91 years old in 2025.

What condition is Park ST over Oakland Estuary 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 April 2023.

How much traffic does Park ST over Oakland Estuary carry?

About 41,000 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is Park ST over Oakland Estuary?

The structure is 433 ft (132 m) long with a longest span of 288 ft (87.8 m) and a deck 48 ft wide.

Who owns Park ST over Oakland Estuary?

It is owned by the County Highway Agency.