Sump/French Drain System

Sump pumping is the most basic of dewatering methods. In essence it involves allowing groundwater to seep into the excavation, collecting it in sumps and then pumping it away for disposal.
Sumps are usually sited at the corners of excavations, below the general excavation level, and are made big enough to hold sufficient water for pumping and keep the excavation floor relatively dry. A pump is provided for each sump and connected to a discharge pipe.
Sump Pumping can be very effective and economic method to achieve modest drawdown's in well-graded coarse soils (such as gravelly sands, sandy gravels and coarse gravels or in hard fissured rock.