The McAllister Group has been carrying out Sewer Network Surveys since 1991 and has over 90 projects completed to date. These range from small village surveys with less than 5km and less than 50 asset points to full city sewer network surveys consisting of several hundred kilometres of sewers and several thousand manholes and assets. We have completed projects for the majority of the Water Authorities in the UK and Ireland in addition to numerous private companies.
Our experienced survey teams undertake detailed structural and dimensional surveys of key sewer assets, often involving confined space entry. The data is collected and either recorded in hard copy survey card form or recorded using the latest mobile PDA devices with built in GPS. A network model of the sewer network is produced in InfoNet as well as drawings of the network in AutoCAD format.
We also carry out comprehensive Pumping Station surveys including drop tests to assess pump efficiency and operation and the mechanical and electrical details of the pumping station. Overall the Sewer Network Survey consists of Manhole Surveys, CSO and Outfall Surveys, Pumping Station and sewer ancillary survey all in accordance with the Model Contract Document.
We also carry out full Topographical surveys using the latest GPS technology or using the traditional total station technique. Many of the sewer network survey completed also required flow and rainfall surveys and Impermeable Area surveys.