Water Utilities Case study wpa

THAMES WATER—MAINS NETWORK PLANS FOR USE IN ROUTINE MONITORING AND MAINTENANCE

Overview

Thames Water are responsible for the mains water network within London and some of the surrounding areas. This area is split into about 600 zones and each has a schematic plan displaying the water network within. These plans are used by Thames Water ‘in the field’ as part of their routine monitoring and maintenance.

Challenge

The plans for the London network needed updates and the surrounding areas (provinces) managed by Thames Water also needed updating to reflect the current network situation.

For Central London, the network will have changed significantly since these plans were last updated, with some areas completely decommissioned and replaced with modern mains and fittings.

The network is accurately represented spatially and kept up to date in a GIS database, but this is not the ideal way to view how the network functions owing to the distances involved. Some areas are packed full of pipes and fittings in a very small space, and some areas may just be a single pipe with few fittings over large areas.

Action

Invicta Surveys commissioned CartoConsult on behalf of Thames Water to update the London plans and to create fresh plans for the surrounding areas. The plans were drawn using AutoCAD and the supplied GIS database was used as a reference guide. A detailed workflow was created and documented to enable the work to be carried out in a routine and timely manner, but also allowing changes to the specification of the plans to be added in at a later date.

Result

Under tight deadlines, Invicta Surveys and CartoConsult succeeded in delivering the plans on time and to a reliable, consistent accuracy.

The project for the provinces was given to CartoConsult and Invicta Surveys based on the success of the first project covering London.

The second project was able to get off to a quick start because of the experience from the first. It was a great help that the detailed workflow could be amended to the changed specifications.

This meant that the plans were delivered weeks in advance of the deadline, and bodes well for any potential future projects of this nature for CartoConsult.

Key Stats


  • 300 London WPA drawings
  • 400 Province WPA drawings
  • KPI success for client
  • Early delivery of project
  • 34,000km of pipe network

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