Unique to mining, compared to many other applications, is the incredibly abrasive and harsh working environments these pumps are put in. Apart from hydraulic challenges in pump design such as avoiding wear hot spots for example, the pumps need to be robust in order to to survive the unavoidable rough handling that is part of everyday life in an active and ever-changing mining environment. These requirements may be at odds with other important design aspects for submersible dewatering pumps in mining applications, such as transportability. It's one thing to carry a 30kg (67lbs) pump when standing upright, with your arm straight, not having to provide more muscle strength than needed to grasp the handle. But, if the pump is too high so that one is forced to bend the arm, this 30 kg (67lbs) pump can suddenly become very heavy to carry around. Add to that the very cramped spaces typical for underground tunneling jobs, it becomes even more obvious that the degrees of freedom for designing a lightweight, small-form-factor, robust, wear-resistant submersible drainage pump are heavily reduced. And that’s only the pump. Electric submersible pumps need power cables and, in some cases, start and motor protection panels that add to the complexity of moving a pump with its long cable plus bulky starter panel around in cramped spaces with limited lifting devices.