US Bridges

RTE 280 NB On-Ramp over China Basin Berry 6 ST

Fair

San Francisco County, California · 04-SF-280-T7.18-SF · Structure no. 34 0123L

Built
1998
27 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
1,452 ft
9 main spans
Daily traffic
18,000
2019 count
Owner
State
State Highway Agency

About this bridge

RTE 280 NB On-Ramp over China Basin Berry 6 ST is a prestressed concrete continuous box beam or girders - single or spread carrying RTE 280 NB On-Ramp over China Basin Berry 6 ST in San Francisco County, California. It was built in 1998, so it is 27 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 5 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 18,000 vehicles a day, roughly 4% of them trucks, projected to reach 22,954 by 2045. The structure is 1,452 ft (442.7 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesRTE 280 NB On-Ramp
CrossesChina Basin Berry 6 ST
Location04-SF-280-T7.18-SF
RouteInterstate 280
Coordinates37.77022, -122.39778
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum 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

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans9 (+8 approach)
Design loadHS 20 + Mod
Structure length1,452 ft (442.7 m)
Longest span167 ft (50.9 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deck19 ft (5.9 m)

Traffic and service

Average daily traffic18,000 (2019)
Projected traffic22,954 by 2045
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible 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 RTE 280 NB On-Ramp over China Basin Berry 6 ST built?

It was built in 1998, making it 27 years old in 2025.

What condition is RTE 280 NB On-Ramp over China Basin Berry 6 ST 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 May 2024.

How much traffic does RTE 280 NB On-Ramp over China Basin Berry 6 ST carry?

About 18,000 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is RTE 280 NB On-Ramp over China Basin Berry 6 ST?

The structure is 1,452 ft (442.7 m) long with a longest span of 167 ft (50.9 m) and a deck 40 ft wide.

Who owns RTE 280 NB On-Ramp over China Basin Berry 6 ST?

It is owned by the State Highway Agency.