Groundwater control at ports and for other marine works has the obvious constraint of close proximity to open water and tidal fluctuations. This implies the potential for rapid rises in groundwater levels if pumping is interrupted for any reason. Since discharge may be direct to the marine environment careful attention must be paid to discharge water quality. Also where cofferdams are being drained coordination is required for the removal of fish which may have become trapped in the cofferdam. Often with ports and marine projects access to the works may be restricted by the tides and therefore works must be planned meticulously beforehand to maximise the available working times. WJ has dealt with these constraints on a range of projects such as the Thames Gateway Port, Thames Tideway and Ipswich Tidal Barrier in the UK, Galata Port in Turkey, and Al Zour LNG Project in Kuwait.
WJ have also previous installed wells in to the river bed in London to dewater a tunnel below. Divers were required for pump installation with generators and control cabins located on a moored barge above. Experienced drill crews and reliable pumping with full auto-restart backup systems are always an essential requirement for dewatering for port and marine structures.