Godscrasher
TS Member
All new build water rides have to use a clean supply of water under H&S legislation. For the water that will be splashed onto guests. This has been the case since the mid 2000,s. This makes the two first points in your reasoning irrelevant because, a natural lake like the one the Flume was in, is no longer a practical spot to put a water ride. They would never ever get planning permission to isolate that lake and replace the lake with a man concerete lined lake using clean, chlorinated filtered water. The type required by law for new builds, as the water will be splashed onto guests. They would have more hope removing the lake all together (which it appears they have done)
Secondly, as it is not natural water being used. The location a water ride could be can be anywhere. As They can just truck the water in. Like they have done with Vallhalls water many times.
Which legislation would that be? Legionella can be controlled in water easily and AFAIK from reading L8 theres no requirement to use fresh water supply on everything.