Middle East Sewage and Draining Services (MESDS, a division of Middle East Foundaiton Group founded with an objective of providing dewatering services to its clients in the Middle East Region.

The object of groundwater dewatering and control is to prevent an excavation below the natural water table and to achieve a groundwater control policy at the construction sites using dewatering techniques in order to maintain as safe and stable working environment as the excavation is in the dry, nevertheless, preventing water pressure from causing damages to foundation formation level(s). In general this can be achieved by physical blocking (e.g. Cut-Off Walls) of the excavation area sides (perimeter) and/or by pumping the groundwater out of that excavation site (e.g. Well Points) forcing the water table to drawdown. The principal methods of groundwater dewatering and control used by the department are:

• Cut-off Walls (Diaphragm and Secant Walls)
• One Stage Well Point System
• Two Stage Well Point System
• French Drains System
• Permanent Deep Wells Systems
• Sacrificial Pumps System
• Temporary Deep Well Systems
• Open Sump Pumping

A variety of engineering and technical activities are required to be practiced for groundwater dewatering and control program. The most significant practices among those are as follows.

• Mobilization and demobilization of equipment
• Dewatering system(s) installation and commissioning
• Supervision and monitoring during installation and operation of the dewatering & water table control systems
• Maintenance of the dewatering system(s) and wells development and rehabilitation
• Pumps Maintenance
• Electricity network connections
• Discharge piping system and disposal points
• Arranging for water discharge NOC’s
• Dewatering system(s) closing down on completion.

The dewatering department is equipped with sophisticated diesel centrifugal pumps, submersible turbine pumps, pipes and piping network fittings, well point systems, deep wells components, control board and panels and all other various accessories.

The department employs highly skilled personnel with long experience in the UAE dewatering industry.

The design of dewatering system is implemented on basis of site’s Hydrogeological and boundary conditions. Reliable analytical and computer based numerical techniques are used to design the dewatering systems in order to achieve water table control work efficiently.