The floor number starts from 10, and there is no 13th floor. West tower will be top at 70th floor, which will have another 20 floors to go; East Tower will be top at 74th floor and will have 24 more floors to go.
I mean this site is too close to Water Club, though the lot itself is bigger than 10 York's lot. But at least, there is Gardiner between 10 York and Ice, and Harbour St. between 10 York and Water Club.