Download Polnoon Masterplan PDF

TitlePolnoon Masterplan
LanguageEnglish
File Size10.7 MB
Total Pages123
Document Text Contents
Page 1

POLNOONPOLNOON
MASTERPLAN: IDEA TO DESIGN

RESIDENTIAL STREETS PROJECT

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Page 2

“DESIGN IS A MATERIAL
CONSIDERATION”
Designing Places, 2001

© Crown Copyright 2009

ISBN: 978-0-7559-8204-2

RR Donnelley B62799 11/09

This publication is also available on the Scottish Government
website: www.scotland.gov.uk

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masterplan

Ground levels

� Road design
The road design and in particular the vertical geometry (road
levels) has been undertaken to ensure that all properties have
level threshold whilst also value engineering the overall road design
in order to balance the extent of excavation and importing of
suitable material. Road specifications were considered carefully
in light of ground conditions.

Water

� Surface water
Surface water drainage was designed to mimic the existing
greenfield run off rate and to ensure no downstream flooding
occurs as a result of the development.

� Sustainable Urban Drainage Systems
� Permeable paving has been placed in all private courtyards

and individual driveways. The system uses a permeable
block which has been given careful consideration to meet
an aesthetic quality as well as functionality. Due to the poor
infiltration in some areas it has been necessary to use a
system which allows surface water to filtrate through the
block paving and road construction into a carrier drain.
The carrier drain will ultimately accept both private highway
and roof water from its catchment. The surface water will
be controlled via an orifice plate to the adoptable sewer
network. Thus the sub-base of the private courtyard will act
as a mini storage area along with a treatment process.

� Bio-retention areas have also been implemented on the site.
These systems accept highway water and are filtered through
aquatic plant life and underlying sub-soil. The water is then
discharged to the adoptable network via a carrier pipe.

� Soak-aways
The use of soak-aways for roof water will be dependent on
satisfactory infiltration rates undertaken during the construction
process.

� Attenuation
As the site is restricted to 30 litres per second to the outfall
position a large amount of surface water will require attenuation.
It is proposed to undertake this by the following:

� Storage tank It is proposed to use a standard tank which
is approximately 850 cubic metres in the central landscaped
area. All tank specifications will be in accordance with
Scottish Water guidance.

� Oversized sewers The use of a spine sewer of 900mm
in diameter is proposed as a further means to store excess
water during high storm events. This spine sewer will also be
supplemented by smaller sewers ranging from 225-450mm
in diameter for smaller catchment areas.

• Control mechanisms
The use of vortex controls within the manholes known as
hydro-brakes will be used to limit flows around the network to
ensure total discharge from the development is no more than the
agreed rate of 30 litres per second. Orifice plates will also be
used to limit water discharging from permeable paving systems.

Flood risk
The development drainage has been designed to accept a 1:200
year storm duration which is over and above the standard 1:30 year
requirement by Scottish Water. In addition a flood routing review was
undertaken to ascertain any vulnerable areas within the development.

Foul water
Foul drainage is designed in accordance with Sewers for Scotland
2nd Edition. The foul discharge will connect to a wider foul sewer
network in Eaglesham.

Utilities
The Service Strip is normally a 2m wide adopted corridor, providing
service providers dedicated space to place their equipment, such
as electric, gas, water, telephone and street lighting. In the case of
Polnoon, a service strip of varying width, i.e. 1.5-2m is provided
within the shared road space. It was agreed not to delineate the
service strip on site as it would compromise the overall aesthetics
of the development. The service corridor was designed to avoid
sewers and trees whilst maintaining suitable utilities coverage.

Construction management
During construction of the site, Mactaggart & Mickel Ltd will
apply for a Considerate Construction award.

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Drainage Plan

Page 122

Bil Fulton

East Renfrewshire Council

EDAW/AECOM

Historic Scotland

Homes for Scotland

Horner + Maclennan Landscape Architects

Mactaggart & Mickel Ltd

Proctor and Matthews Architects

Scottish Environment Protection Agency

Scottish Government Transport

Scottish Water

Waterman Boreham Transport Planning

WSP Group

With special thanksand acknowledgement
alphabetically

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120 residential streets project | master plan

Page 123

POLNOONPOLNOON
MASTERPLAN: IDEA TO DESIGN

RESIDENTIAL STREETS PROJECT

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