The revitalization will create 1,100 to 1,300 mixed income homes, including the replace- ment of 504 public housing units, apartments, retail opportunities, parks, yards and parking. Additionally, Armstrong High School will be rebuilt. Each effort will be done in phases, with Armstrong Phase 1 expected to start November 2015 and housing replacements to begin Spring 2017.
I think the paragraph above is meant to refer to plans to redevelop the old Armstrong high into a mixed-income housing community, not rebuild the current high school. Not that there would be anything wrong with that.