C466 – Bathymetric River Bed Surveys for the Thames Tideway Tunnel Project.

Descriptions

The Contract is for the performance of Bathymetric River Bed Surveys for the Thames Tideway Tunnel Project. The Services and Works are to take place at various sites in London, UK. Details of the Thames Tideway Tunnel Project are given in the PQP and further information can be viewed at the Project's website: www.thamestidewaytunnel.co.uk.The bathymetric river bed surveys are more particularly described in the Contracting Entity's PQP available to the Applicants from the address at I.1 above but the scope will include:— Baseline bathymetric surveys are to be conducted for a period of approximately eighteen months prior to the start of river based construction activities to establish a baseline;— The bathymetric surveys are to be conducted on a quarterly basis, around the time of the equinoxes along the river and at 10 specific sites (7 construction sites and 3 barge handling facilities);— In the 18 month period one whole river survey comprising a full width river bed survey along the river from Chiswick Eyot to Greenwich Pier and 5 site specific river surveys comprising local surveys in the vicinity of each of the identified foreshore sites shall be completed;— Bathymetric surveys shall be carried out using multi-beam sonar and laser scanning techniques recording the data in digital format to both the project grid and the project datum, OS National Grid co-ordinate system and using a format acceptable to the Port of London Authority. Surveys are to include 3D laser scanning of intertidal areas and photographic records.— High definition 360degree digital panoramic photography integrated with the laser scanning equipment shall be undertaken.— The services described above relating to any additional bathymetric surveys that may be required for the Project;— The output of the survey services will form part of baseline information included in details provided to Contractors for the Category 1 Main Works.Interested organisations should refer to II.2 (Quantity or scope) and VI.3 (Additional information) and to the PQP for further information on the description of the Services, the Works and the Contract.