Client: Galliford Try/Morgan Sindall Joint Venture, Scottish Water.
Value: £2,675,000

To construct Two pumping stations and Retaining Wall at bay area, Cowal Peninsula.

The project consists of 3Nr. concrete structures (West Bay Pumping Station, East bay Pumping Station and Jim Crow CSO Chamber & Retaining Wall), 534m of 1200mm & 600mm micro-tunnels, 500m open-cut pipelines and site works at the 3Nr concrete structure locations.
West Bay storm storage tank/pumping station was constructed as an elliptical shaped caisson shaft (major axis 25m, minor axis 15m, depth 15m). It was designed by Ward & Burke Construction to deal with the existing site constraints of: sea wall; high pressure gas main; existing building; site geology of marine deposit overlying mudstone rock; and storage capacity requirements. It represents an alternative to the design proposed by the Client consisting of two circular segmental ring caisson shafts.

  • East Bay pumping station consists of the construction of a new Pumping Station Wet Well and Dry Well on the seaward side adjacent to the Sea Wall.
  • The design called for a rectangular structure 10m x 8m x 11m deep.