CCBC backed the idea and we are left with what you see now.
They have not and probably will not admit that they dropped a monumental clanger here
But they learnt - which is why they dumped rubble instead of sand on the North Shore.
In fact, dealing with 'consultants' is akin to herding fish. They never state anything as absolutes, or give guarantees. They will always say 'should' and 'hopefully', so suing them isn't an option. The other side of the coin is that we can bet anything that CCBC will not have opted for the recommended scheme, since they would want to keep costs to a minimum.
Even given the council's natural proclivity for not spending money where it matters, or for those councillors who manage to stay awake during meetings not to exert their somewhat rudimentary intellects in questioning the scheme's proposals, one would have thought at least one person might have raised the point about the prevailing winds.