This was an old lead mine. Attempts to lower the water level failed.
From the British Geological Survey Borehole records. (Record Page 2)

From Wirksworth UDC Public Health reports: Blobber Mine water supply with submersible pump, chlorination equipment and necessary mains extension and ancillary works commissioned Spring 1954. A new pumphouse has been erected containing meters and chlorination apparatus and pumping unit consisting of an Electric Submersible 24 h.p. Pump has been installed capable of delivering 144,000 galls. of water per day against a total head of 347 feet. Laying of new mains, alteration of existing mains and all ancillary works necessary for the completion of the scheme have bean carried out. The water to be extracted from the disused mine and mixed with the present spring supplies is of excellent quality and entirely free from contamination. The normal
procedure of bacteriological examination of the water will be carried out and any slight deterioration of quality can be corrected by the newly installed automatic chlorination plant. In 1960 the Council ordered a duplicate pump for this site.