Although some tend to lump Derbyshire in with the Midlands; the High Peak has more affinity with counties further north and in particular Greater Manchester. Derbyshire's High Peak also known as the Dark Peak is part of the Manchester Commuter Belt.
Being in the Pennines and an area of high precipitation, it has provided water supplies for nearby urban areas.
Nottinghamshire Guardian - Friday 09 February 1877 - it is understood that the Manchester Corporation's Waterworks Committee are looking into providing supplies from Cumberland in addition to the supply from Longdendale.
End note...hadn't realised how long ago I began this...
Studied hydrology off and on for decades. Glad the much anticipated Whaley Bridge disaster did not materialse.
Time to keep my own council...fwiw