As an add-on
I believe that water was taken from Chadwick Sough and was taken around Ecton (via the old reservoir - Fishpond) to the otherside of the hill.
And didn't Arkwirght use water from a sough to power his mills?
Don't know about any dewatering of the sandstone, but if they were driven above the water table, the only 'rainfall' would enter the sough and be discharged with the mine water.
Wouldn't mind seeing that artical in mining history
I went in a mine once.... it was dark and scary..... full of weirdos
When do I get my soapbox, I need to rant on about some b***cks