I remember a high rise building in Alexandria,Va that collapsed while under construction. The pools frame was dismantled too soon so the concrete spread and caused the collapse. 1973 or 74 I believe.
On March 2, 1973, the 26-story Skyline Plaza condominium building, under construction in Bailey's Crossroads in Fairfax County, Virginia, collapsed, killing 14 construction workers and injuring 35 others.