As it is still a working quarry (I get stuck behind there lorries every morning
) I am supprised that the Health and Safety Executive would allow "visitors". This is how we lost out club water down in Fife.
Also, this is the site for a new housing development and the "Loch" is clearly part of the plans, being surrounded by houses...the plans were in the P and J a few months back.
Having said that, I would be more worried about having Rainbows so close to the Dee.