After extensive research I have come to the conclusion that an IWS as proposed is doable but not feasible, because of the many political and legal ramifications. Many years ago they built the Los Angeles Aqueduct from Lake Havasu to LA at a great expense. It helped LA grow but in those times there was plenty of water and no politics involved. In the nineties an under ocean pipeline was proposed from Alaska to California’s Lake Shasta, but it never came to fruition. Desalinization will take care of part of the problem but at present technology it is quite expensive and environmentally not so good because of all of the salt and other residues that have to be disposed of.
My thinking at this point is that the Alaska Pipeline is not being used and at least part of it could be used to branch off to one of Alaska’s hundreds of lakes, many of which are constantly being replenished by rivers, streams, springs and runoff. The pipeline ends basically in Southern Alaska but could be extended to California by way of an undersea pipeline or possibly to other parts of the U.S. via the Canadian and U.S. pipeline systems which are extensive but at this time I believe are being used for natural gas but possibly in the future they will be unused. Hopefully the people in Alaska would probably be very happy to sell some of their water, since they no longer are able to sell us natural gas as they are used to doing.