Hillingdon SuDS Design & Evaluation Guide

Local SuDS requirements
23
Local Suds Specific Requirements
The London Borough of Hillingdon as the 2nd
largest London Borough
Urban creep including the paving of front
gardens and climate change is putting an
increasing pressure on the existing drainage
system. Particularly heavy rainfall is resulting
in increasingly flashy catchments causing
flooding. Equally the polluted and silted
nature of run off from the traditional drainage
measures has resulted in the poor water
framework directive status of many of the
rivers in Hillingdon.
The London Borough of Hillingdon has
developed a Flood Risk portfolio of
documents supporting the flood risk
management within the Borough including
the Surface Water Management Plan and
Local Flood Risk Management Strategy.
These identify Critical Drainage Areas and
areas where work are being planned to
reduce risk, as well as provide
recommendations that have then been
adopted as policies in the Local Plan. This
ensures that SuDs and Green Infrastructure
as well as waterways are integral part of
development. Designing the worst case
scenario is not acceptable. Where a suitable
scheme can not be implemented, offsite
contributions will be considered.
Local LPA and Stakeholder Engagement
Early Consultation before the planning
process is strongly encouraged for all types
of development ( from small scale to major)
and developers are also encouraged to
undertake detailed pre application
discussions with the Local Planning Authority.
This is critical in major schemes where the
inclusion of SuDs need to be considered
alongside the development of key features of
a scheme to ensure it is fully integrated and
the best Sustainable Drainage options can be
delivered.
The LPA pre application advice service
incorporates all technical consultees within
the remit of the Council.
Further information can be found on the
London Borough of Hillingdon website of our
policies and processes, as well as design
checklists and proforma to help you.
Facing top: Swales within the main spine road
at St Andrews Park, Uxbridge - a new 1500
home development near the town centre
adjacent to a new country park.
The area is under pressure to accommodate
growth along the infrastructure corridors
such as Crossrail. Much of the water supply in
this area is met by groundwater abstraction
which is limited. Therefore each development
should contribute to reducing the pressure
on our water resources through the provision
of water reuse and rainwater harvesting.
Facing bottom: Green Roof at Lake Farm
School - part of the Hillingdon Schools
Expansion programme.
London Borough of Hillingdon SuDS D & E Guide
© 2018 McCloy Consulting & Robert Bray Associates