Drilling of wells

System section

Site plan

• Clients
  • Rother District Council
• Main contractors
  • Dean and Dyball
• Consultants
  • Terry Oakes Associates and GCG
• Key contributors
  • Halcrow Group
• WJGL roles
  • Pneumatic well system subcontractor
• Project reference
  • J1278

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A number of measures were used to arrest cliff recession, which was threatening residential property, including a permanent groundwater control scheme which was installed by WJ. The scheme comprises an array of 56 wells installed at 5 m centres along a road above the back scarp of the slip. The wells are 25 m deep and are pumped using an electro-pneumatic system driven from a purpose built compressor house. The well heads are in manholes with connecting ducts for the pneumatic control system and monitoring sensor cables. The compressor house also contains a datalogger and modem which uses flow meters and vibrating wire transducers to monitor the system performance. WJ was responsible for the control and maintenance of the scheme for the first 5 years of operation.

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