Page 75 - Updated SuDS Design & Evaluation Guide-Newham V3 Spreads

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Detailed Design 9.3 Typical Detailed Design package 9.3.2 Drawing package Detailed Design

The Detailed Design package should be
The SuDS drawing package should include
proportionate to the scale of the
the following:
development and will generally encompass a
Topographical survey of the site
Design
design statement with accompanying
information
drawings. Supporting information including
Coordinated constraints map identifying all potential design constraints including
drawings
calculations, maintenance plan and risk
areas of flood risk (fluvial, pluvial and ground water), contaminated land,
assessment will also be required.
archaeological significance, poor ground conditions, unexploded ordnance (UXO),
presence of invasive species, protected habitats, tree Protection Orders (TPO) and
root protection zones (RPZ). [note : list is not exhaustive]
9.3.1 SuDS Design Statement Existing utility services drawing. Details of existing site surface water drainage

infrastructure and ownership established
The SuDS Design Statement should cover ■ outline how requirements of NPPF, NSTS,
SuDS provisions on quantity, quality, amenity local SuDS policies, requirements for Plan of site detailing flow routes including exceedance flow routes, subcatchment
and biodiversity and how opportunities multi-functional use of SuDS space and boundaries, flow control locations, storage locations, contributing impermeable area,
provided by the site have been maximised local objectives for sustainability including and phasing where appropriate;
along with addressing the following: climate resilience are dealt with Drawing of site drainage catchment areas showing permeable and impermeable areas
within defined subcatcatchments.
■ confirm drainage design criteria agreed ■ explain how SuDS will function passively
with LPA. For example, rainfall return in terms of treatment and management
periods, discharge allowance, traffic Design Detailed site layout at an identified scale (1:200 or 1:500 or as appropriate or any other
loading requirements etc ■ outline details of any offsite works drawings scale agreed) including a North direction arrow.
69 ■ summarise the findings of the FRA and required, together with any necessary Long sections and cross sections for the proposed drainage system, including 70
consents.
highlight any other significant site surrounding site level and proposed finished floor levels (where appropriate)

constraints Construction Details – inlets, outlets, flow controls, storage, edge details, connection
details to receiving watercourse / sewers / public surface water sewers / highway
drains;

Planting arrangement and surface treatment / materials drawings where detailed not
included on other drawings.

Critical design levels should be identified on all relevant drawings.

Facing:
Rectory Gardens Rainpark, Hornsey.
A small public park that collects polluted road
runoff through silt forebays and underdrained
infiltration basins that discharge clean water
slowly to the River Moselle.

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