So, now what?
The pro-Peripheral Canal people (I was once one of them) say that such a failure makes it imperative that the PC be built.
But that's only if you care about continuing water exports from the Delta -- something that I do not see as imperative. I'd say that we should concentrate on increasing the scope and scale for water trading south of the Delta, so that the cut-off in water exports results in very little harm/disruption. See next post.
Bottom Line: We cannot continue to build walls on top of walls and tunnels over tunnels when the tide is coming in. Remember how UNsuccessful King Canute was at stopping the tides.