The electricity Alliance West commissioned Rook Services to undertake a GPR and GPS survey of the 400Kv substation in Carrington. Rooks survey was to identify any services using Ground penetrating radar so that construction could commence safely. All areas which were ground penetrating radar surveyed were heavily built up with anchor points in place, existing banks being excavated and tower locations under construction. Rook Services completed the survey highlighting utility assets which were not on existing plans and also services which were not there, that had assumed to be. Furthermore the ground penetrating radar survey was highlighted as being a cost effective method to use more frequently for the client.