Work on the nearly $100-million perimeter pile upgrade on the 645-ft-tall residential tower to prevent significant future settlement follows the resolution of litigation.

With the lengthy and complex permitting and approval process complete and almost all the other details worked out, construction could begin in mid-November on the estimated $100-million fix for San Francisco's 645-ft-tall Millennium Tower, which has settled more than 17 in. since its completion in 2009.