Notice of Geotechnical Work at Diridon 3/8 – 3/12

Notice Cause
Notice Effect(s)
Sidewalk Closure
Start Date
End Date

Contractors will be conducting soil resistivity testing to determine soil electrical resistance values to support the future BSVII Diridon Station grounding design.


The work will take place in the Diridon Station Parking Lot bounded by W. Santa Clara St, Cahill St, Crandall St, and Montgomery St.   

location of geotechnical work near Diridon Station


  • Work will be conducted as early as Fri Mar 8th – Tue Mar 12th. 
  • General working hours will be 7:00 AM-5:00 PM.

* Please note that timelines for construction activity have some inherent uncertainty and may change depending on field conditions and/or inclement weather.

What to Expect

  • The work activity will be conducted with primarily handheld specialty equipment.
  • Half-inch holes will be drilled into the pavement to access the soil below. These holes will be backfilled with cold-patch asphalt concrete.
  • Four tests will be performed in approximately 10 ft by 80 ft areas in the parking plot.
  • Staff will set up cones and direct traffic.
  • This work activity does not typically generate dust.

Necessary to help prepare for VTA’s BART Silicon Valley Phase II Project.   

Community Impacts