Water and sewerage companies (WASCs) must maintain what are known as Transferred Drains and Sewers (TDS). Prior to 2011 these were private but under a government act were transferred to the ownership and responsibility of water companies. This has in some cases doubled the length of sewers to be maintained but most companies have very poor records of the length, location, condition and serviceability of these pipes which typically connect properties to main sewers.
They are often the site of blockages and these can result in property sewer flooding which is devastating for our customers. Over the last 10 years attempts have been made to map or infer the position of these sewers to provide planners and operational staff with better information for replacement and servicing. A new, innovative approach is needed to map these sewers in an economically viable way in a reasonable timescale.
Come and join NWG, Yorkshire Water and Southern Water to crack this challenge!
WASCs have used various modelling approaches. We intend to look at the pros and cons of these and identify the common weaknesses, the data gaps that need to be filled and we’ll consider and even look at various innovations, technologies and datasets that could be used to create a new hybrid mapping solution. How can we combine these to come up with a set of tools that can be combined in different ways to map any region, geography, regardless of age of network, rural/urban and current state of mapping. Our intention is to apply to the next round of Ofwat’s WBC for funding to run a pilot and show the effectiveness of the resulting new approach. An approach that any water company can adopt and adapt.