Great stuff and a cracking report. The waterwheel looks awesome and a brilliant reward.
Definitely going to add this to my list of places to wander in to.
I don't think your snaps are at all bad considering you haven't much experience. In fact I really like how you've lit the waterwheel in the penultimate snap.
Good write up mate im going to be popping up in the next few weeks to have a explore, ive done the minllyn slate mine a few miles away but not this one