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...Techniques and developments in quarry surface mine dewatering m preene groundwater consulting limited berry lane horbury wakeeld wf hd uk abstract is essential for the safe efcient operation of quarries open pit mines that extend below level benets include better working conditions greater efciency mining operations as well improved geotechnical stability example by allowing steeper side slopes can be divided into two main groups which may used combination rst group pumping methods where water pumped from arrays wells or sumps piped away disposal sub horizontal drains wellpoints ejector drainage adits tunnels second exclusion low permeability walls barriers are to reduce inows bentonite slurry grout curtains articial ground freezing equipment have been rened over many decades no signicant step changes capabilities on horizon however there opportunities technology transfer recent other industries an improvements remote monitoring control systems routinely but rarely sites such ripe wide...