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Printer Friendly VersionSelected Information - Completed Research

CP144  Drainage Layouts for New Styles of Housing Sewerage
Planning Policy documents (e.g. PPG3 and companion guide "Better Places to Live: By Design") are radically changing the design of new housing developments in the UK. These changes require much higher densities (30 to 50 dwellings per hectare) and suggest perimeter block style layouts creating a solid wall of building with little or no rear access for drainage services.

Implementing these changes has led to problems including keeping sewers sufficiently far from buildings and making it difficult to route sewers from the rear of buildings into the street, except through archways. Developers are therefore proposing layouts which Water Utilities may find difficult to adopt, and there is delay and increased costs to all parties in achieving acceptable solutions.

This project will investigate the technical challenges that these changes present to drainage planners, designers and operators, and will recommend complementary drainage approaches acceptable to each key stakeholder.

Benefits

  • For Water Utilities, the benefits will be more acceptable designs being presented by developers for adoption resulting in: reduced planning costs; potential operational/maintenance problems minimised and increased adoptability of sewers.
  • For developers, the benefits will be a streamlining and speeding up of drainage design and approval, reducing design and construction costs, and increasing confidence in solutions.
  • For the occupiers of the housing, the benefits will be increased scope for sewer adoption in new developments and less likelihood of expensive private sewer problems.
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