Dredging and pumping works

Tender description

Maintenance dredging in Harwich and Felixstowe, disposal to sea and to sites in the harbour; small scale plough and agitation dredging; associated hydro-graphic survey. Dredging maintenance silt from harbour berths and approaches using plough / bed leveller and trailer suction hopper dredger(s) for disposal at sea. Work is to remove approximately 1 200 000 cubic metres (in-hopper) over a period of 6 months. Lot 1 will also include the possibility of additional dredging as required of fine sand or sand and gravel, carried out in the approach channels and disposed to sea. Dredging maintenance silt from harbour berths and approaches using a small trailer suction hopper dredger for disposal at designated sites in Harwich Harbour as beneficial sediment placements. Work is to dredge approximately 100 000 cubic metres (in-hopper) of maintenance silt and dispose of in sediment placement sites in the Harbour. The works have to be carried out in 3 separate operations between the beginning of November and the end of April each year. Deployment of water injection or other approved equipment for dredging in shallow areas including marina channels, areas of restricted access and around and under pontoons. Work is expected to take approximately 20 tides (6 hour periods around high water) but could be extended as required. This work is currently undertaken once per year in the early spring.