The plans for this second phase canal were actually drawn up in the 1980s but the enviros killed it. The Alaska pipeline and the CAP were amazing projects from an era when America had vision and dared to think big
New desalination tech makes this plan economically reasonable to solve both California and Arizona's water needs which would take the pressure off Las Vegas
Such a plan could also allow the US to send more water downstream to Mexico
Have you ever viewed satellite images of the Colorado River below Yuma?
Barely a trickle gets beyond the border...and all of that gets used up by Mexican irrigation projects around San Luis and Algodones.
What's left is this enormous, but largely waterless, delta draining into the Gulf of California. There is a sparse spider web of tidal streams, but most of the delta looks overgrown with weeds and brush.
A weird landscape...