1) To drain or empty of water.
A dam was drawn when a sluice was opened.
2) A verb that was much in use in coal-mining from when shafts were first sunk.
The analogy was with the bucket and rope of the ‘draw-well’, operated by a primitive windlass. In an early law-suit the word ‘to draw’ alternated with ‘to wind’: 1591 make one pitte for the wyndinge and getting of coles at a place called Stump Crosse, Northowram: in the same document it was claimed that 2,000 horse-loads of coals had been cunningly drawn up … at the said pit . The word was used whenever coal, rubbish, water, and the workmen themselves were brought to the surface. The banksman was initially the ‘drawer up’ of coals, until his job became more wide-ranging.