One of the tallest residential building in the U.S. west of Chicago, the $350-million Millennium Tower consists of a 60-story tower, a 12-story mid-rise portion with apartments, an amenity level, retail space and a public glass atrium that links the two structures together. In total the project includes 419 condominium units, 21,500 sq ft of amenity space, 8,000 sq ft of retail space and a five-level underground parking garage for 340 cars. Related Links: Best of California 2009 At 645 ft, the tower is the fourth-tallest structure on the San Francisco skyline. The tower’s immense height posed many challenges and