After the successful installation of a 24-in.-dia permanent pilot pile at the troubled foundation upgrade of the settling Millennium Tower in San Francisco, the Dept. of Building Inspection (DBI) has given Shimmick Construction Co. permission to install a second pilot pile, beginning Dec. 1.
“Our position is based on the minimal overall settlement and tilt produced by the three 36-in. pilot casings and one 24-in. pilot pile installed…,” said Patrick O’Riordan, interim director of the San Francisco DBI, in a Nov. 30 letter to the Millennium Tower Association. He added that if the second pile installation is successful, DBI would "support installation of one additional 24-in. pilot pile along Fremont Street."