Page 144 - Updated SuDS Design & Evaluation Guide-Newham V3 Spreads

P. 144

Detailed Design 9.12 Management of the SuDS landscape 9.12.2 The SuDS Management Plan Site management usually requires an element Detailed Design
of regular site attendance, often monthly,
9.12.1 The principles of SuDS
A SuDS Management Plan is a document that
which corresponds with most SuDS
describes the development, the place of
management
maintenance. Occasional and potential
SuDS in managing rainfall and can include
remedial maintenance should also be covered
Importantly, where SuDS form part of a
All designed landscapes require some level of
landscape maintenance. It will describe the
by the plan.
landscape (which would be present
management. Where maintenance is not
aspirations for the development and
■
regardless of SuDS), this minimal attention
Regular maintenance – SuDS visits should
expected changes over time including any
carried out development will evolve towards
should be considered as site care and not
woodland or an urban wasteland.
everyday site management visits.
This document introduces a ‘passive
The plan will provide a brief explanation of
and pipe work is not needed which reduces
Occasional maintenance – covers tasks
maintenance’ approach for SuDS. This does dedicated SuDS care. The cleaning of gullies future expansion or redevelopment. ■ be at a monthly frequency to match
SuDS, how the SuDS infrastructure on the
overall management costs.
not imply no maintenance but rather that site operates and the benefits of retaining where the frequency cannot be predicted
much of the care for SuDS is site Passive maintenance is therefore linked to functionality of SuDS. accurately or is infrequent.
management rather than dedicated SuDS integrated SuDS design.
SuDS management will be explained ■ Remedial maintenance – covers work that
maintenance.
including anticipated changes over time. cannot be anticipated or is a result of
Hydrocarbons and other organic based design failure. Damage may include, for
pollution such as which wash off hard The management plan will include a Schedule instance, rutting where unexpected
of Work covering the following:
surfaces is broken down by natural processes vehicle access has occurred on wet
(passive treatment), within many SuDS ■ maintenance tasks identifying frequency ground. Replacement of items which have
components meaning that there is no long of undertaking a defined lifespan, such as geocellular
term build up of organic pollution. Heavy ■ waste management requirements tanks should be covered here or
139 metals and inorganic pollutants are trapped (including EA exemption) provisions made elsewhere. 140
within Source controls at low concentrations
and therefore form no threat to amenity ■ a pricing schedule for the maintenance
features or aquatic environments. contractor where appropriate with any
specification notes required to explain
This is different to ‘intervention’ maintenance
technical details.
which is required for conventional drainage
to remove toxic liquor from gully sumps or oil
and grit from interceptors and separators
which can be costly and in many cases not
completed, rendering the treatment function
redundant. Intervention maintenance can also
Hopwood Park MSA M42.
be required for SuDS to remove silt, however A light tracked excavator removes aquatic Design Note:
through the use of source controls this vegetation to de-water next to the wetland, Information in the management plan should be conveyed in a manner that is understandable
requirement will be minimised. before moving to a wildlife pile.
to Site Operatives. Use of technical terms and unnecessary information should be avoided.

The Maintenance Schedule and key plan identifying locations of key features should not
exceed a double sided A4 which can be laminated and retained in the operatives work van.

139 140 141 142 143 144 145 146 147 148 149