This engineering method was employed at Expo 67 and Montreal, 76 Olympics, I was very young in '76 -, Montreal, Canadians just won the Cup again, City was exciting place to be and live then, martial plan suggested for the Ring should employ should consider the Critical path method to complete this mega project, Hatch is an excellent engineering company, however Nothing can top the engineers who build Ile Notre Dam and Nasa of the 60's and '70s. Who landed a Man on the moon.  Sometimes the way forward is to go back in time and see how other mega projects were actually built. Spot