In the current days the dewatering techniques and systems are so advanced and well defined for each type of mine – open pit or underground – that even mines with thousands of meters deep can be successfully dewatered, if and when needed

Dewatering a totally or partially flooded mine, or even as a normal procedure in normal mine activity, may carry an amount of problems, most of which are environmentally related. This can happen in open pit mines as well as in underground mines.

The most relevant concerns with mine dewatering are related to acid mine drainage and the dispersal of contaminated water into other water fonts and the general environment becoming a serious source of pollution.