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BAYSPRING P/L v CITY OF CHARLES STURT [2008] SAERDC 89 (22 December 2008)
Last Updated: 23 December 2008
ENVIRONMENT, RESOURCES AND
DEVELOPMENT COURT OF SOUTH AUSTRALIA
DISCLAIMER - Every effort
has been made to comply with suppression orders or statutory provisions
prohibiting publication that may
apply to this judgment. The onus remains on
any person using material in the judgment to ensure that the intended use of
that material
does not breach any such order or provision. Further enquiries
may be directed to the Registry of the Court in which it was generated.
BAYSPRING
P/L v CITY OF CHARLES STURT
[2008] SAERDC 89
Judgment of Her Honour Judge
Cole, Commissioner Green and Commissioner Hutchings
22 December 2008
ENVIRONMENT AND PLANNING -
ENVIRONMENTAL PLANNING - DEVELOPMENT CONTROL
Appeal against refusal by Council of an application for development approval
for a supermarket and shops at ground floor level, with
residential apartments
on three floors and associated car parking - issues in relation to bulk, scale
and height of the proposed
building, traffic safety concerns and whether
proposed development would have any adverse impact on the State and Local
Heritage
Places in its vicinity - decision of Council reversed - development
plan consent granted subject to conditions.
Development Act 1993, referred to.
BAYSPRING P/L v CITY OF
CHARLES STURT
[2008] SAERDC
89
THE COURT DELIVERED THE FOLLOWING JUDGMENT:
- Bayspring
Pty Ltd (“Bayspring”) applied to the City of Charles Sturt
(“the Council”) for development plan
consent for a development
proposed for the land at 330A to 352 Seaview Road, and 301 Military Road, Henley
Beach (“the site”).
The development proposed comprised a
supermarket and shops at ground floor level, with 47 residential apartments on
three floors
above ground level and undercroft, basement and ground level
parking. The Council refused to grant development plan consent to the
proposed
development, and Bayspring appealed against that refusal.
- At
the hearing of the appeal, evidence was given in Bayspring’s case by
Mr Weaver, a traffic engineer, Mr Smith, a planner,
Mr Schulz, a heritage
architect, Mr Loucas, the project architect, Mr Paterson, a crime prevention
consultant, and Ms Nolan, a town
planner. Ms Bell, a town planner, and
Ms Vines, a heritage architect, gave evidence in the Council’s case.
Mr Hayes
QC appeared for the Council, and Mr Henry appeared for Bayspring. The
Court took a view of the site and the locality with the
parties.
The Land
- The
site has a frontage to Seaview Road, Military Road and Main Street, Henley
Beach. The site is an irregular, flagpole shape.
It runs from Main Street
north up Military Road for 125.25 metres. The frontage to Main Street (the
southern portion of the site)
is 29.53 metres in length. The northern portion
of the site goes through from Military to Seaview Road, and the Seaview Road
frontage
is 52.81 metres in length. The total area of the site is 5,870m².
The proposed building is to be sited on that portion of the
site situated
between Seaview and Military Roads. That part of the site has recently been
almost entirely cleared of buildings.
It formerly accommodated shops, including
two very small supermarkets, and a restaurant. The southern most part of the
site, which
is presently disposed as a carpark, together with the rear of the
shop building which presently fronts Seaview Road, will be regraded
and upgraded
as a ground level carpark which will be integrated with the undercroft and
basement carpark which is to be part of the
proposed
building.
The Locality
- Each
of the town planners and the architects identified a locality for the purpose of
assessing the proposed development. The localities
were all slightly different
from one another. Nothing turns on the differences. We adopt
Ms Nolan’s locality, which
was among the most extensive, because it
seems to us that it encompasses the whole of the area within which the proposal
will have
a visual impact. Ms Nolan’s locality extends about 400 metres
to the north along Seaview Road, about 200 metres to the south
of Main Street,
to the east along the full length of York Street, and to the west up the Henley
Beach jetty, taking in Henley Square.
- The
character of the locality is mixed. Henley Square is an important focal point
for the locality. The locality includes a number
of local heritage places and
two State Heritage places, being the Ramsgate Hotel on the south eastern corner
of Main Street and Seaview
Road and the Temple Uniting Church on the western
side of Military Road slightly north of the site. The southern portion of the
locality includes the Hotel, shops and restaurants, including the restaurants
around Henley Square. There are also offices and dwellings.
The northern and
eastern portion of the locality is characterised by dwellings of a wide variety
of sizes and ages. Seaview Road
is an arterial road and carries in the order of
9,700 vehicles per day. Military Road is a major collector road, and carries a
number
of bus routes.
The Proposed Development
- The
proposed development comprises a building, containing a 2540m² supermarket
and 505m² of specialty shops at ground level,
47 apartments in three levels
above ground level, an undercroft carpark of 84 spaces, a basement carpark of
118 spaces, and the grading
and upgrading of the existing carpark off Main
Street, which will have 43 spaces.
- The
proposal is shown on a series of 18 plans tendered in evidence. The building is
a contemporary design, using “Brighton
lite” concrete, mineral
coated aluminium louvre privacy screens, marble wall panels and blue glass. The
ground floor edge
of the building along the Seaview Road frontage will be close
to the Seaview Road boundary of the site. The boundary is at an angle,
and the
building will be stepped to accommodate that angle. Verandah canopies are
proposed for a substantial proportion of the Seaview
Road frontage. The ground
floor edge of the building along the Military Road frontage will be on the
Military Road boundary, and
will include the loading dock for the supermarket
component of the proposed development. The first two floors of apartments are
to be set back more than 20 metres from the Military Road boundary, and the
third apartment floor is to be set back about 24 metres
from the Military Road
boundary (excluding balconies). On the Seaview Road frontage, the first two
floors of apartments will be
stepped back slightly relative to the supermarket
frontage, and the third floor of apartments will be stepped back some 6 metres
from the supermarket frontage (excluding balconies). The roof is to be a series
of 5 pairs of wing shaped elements, which will carry
photo-voltaic solar
panels.
The Development Plan
- The
site is within the Neighbourhood Centre (Henley Square) Zone (see Map ChSt/18).
That Zone is divided into two policy areas; Policy
Area 51 and Policy Area 52
(see Map ChSt/40). Policy Area 51, which is called the Henley Square Historic
(Conservation) Policy Area,
is centred on Henley Square, and includes the
properties adjacent to Henley Square. Policy Area 52, which is called the
Retail/Mixed
Use Policy Area, wraps around Policy Area 51 on all sides except
the sea side. The site is within Policy Area 52, and comprises
a substantial
portion of that Policy Area.
- The
Development Plan for the Council contains many provisions which are relevant to
the assessment of the proposed development. They
are listed and quoted in the
statements of the experts who gave evidence at the hearing in this matter.
Assessment
- It
is common ground that the land use proposed is appropriate for the site.
- Many
of the concerns the Council held in relation to the proposed development have
been overcome by Bayspring by means of amendments
to the plans or the provision
of further information. By the end of the hearing, concerns about traffic
safety, the adequacy of
carparking and the convenience for users of the carpark
layout had all been resolved. It was common ground that the Council’s
concerns about lighting and crime prevention could be addressed, in the event
that the proposed development were to be approved,
by appropriate conditions
being imposed upon the development plan consent.
- Ms
Bell maintained her concern that the carpark layout, particularly in relation to
that part of the carpark which will have a frontage
to Main Street, would not be
convenient for pedestrians to use, particularly if they have a shopping trolley
or a pusher. We are
satisfied that the carparking layout is appropriate, and
will be sufficiently convenient for pedestrians. We accept
Mr Weaver’s
evidence in relation to traffic safety, the adequacy of
carparking and the functioning of the carparks.
- The
remaining issues concern the bulk, scale and height of the proposed building,
the interface between the Military Road frontage
of the proposed development and
the Residential Historic (Conservation) Zone to the east of Policy Area 51 and
the impact of the
proposed development upon heritage places and heritage
areas.
Bulk, Scale and Height of the Proposed Building
- Ms
Bell and Ms Vines both consider that the proposed building is higher than the
Development Plan envisages for the site. Principle
of Development Control (PDC)
5 for the Neighbourhood Centre (Henley Square) Zone
says:
Development should not exceed a height of 10.2 metres from natural ground level
at any point. Where desirable to add visual interest
to the appearance and roof
form of the building, a gable roof form or parapet (which does not contain any
habitable space) may penetrate
the 10.2 metre height to a minor
extent.
- The
Residential Zone (Western Edge Policy Area 3) abuts the site to the north. PDC
1 for that Zone seeks dwellings, including residential
flat buildings, at medium
densities. PDC 17(f)(ii) for that Zone says:
The building is erected within the building envelope in Fig R/6 unless varied by
the following and provided that:
(f) Three storey buildings are appropriate where located in:
(ii) the area bound by the Neighbourhood Centre (Henley) Zone, Military Road to
North Street, Seaview Road, Marlborough Street and
Esplanade;
subject to the building height being no greater than 10.2 metres. Where
desirable to add visual interest to the appearance and roof
form of the
building, a gable roof form or parapet (which does not contain any habitable
space) may penetrate the 10.2 metre building
height to a minor
extent.
- We
take it that the Neighbourhood Centre (Henley) Zone referred to is the
Neighbourhood Centre (Henley Square) Zone. There presently
exists on the land
immediately to the north of the site a block of flats which is approximately
12.47 metres above the level
of Seaview Road.
- To
the east of the site, and abutting it for a short distance, is the Residential
Historic (Conservation) Zone (Henley Policy Area
20). This Zone contains the
Temple Uniting Church at 214 Military Road, which is a State Heritage Place
located a short distance
to the north of the site, together with several Local
Heritage Places and numerous contributory places. The provisions of the
Residential
Historic (Conservation) Zone place emphasis upon the desirability of
maintaining and complementing the existing historic character
of the Zone. That
part of the Zone to the east of the site is generally single storey
development.
- PDC
3(b) for Policy Area 51 provides:
Buildings and additions should:
(b) be consistent with and no greater than the height of surrounding heritage
buildings. No building should exceed the height of
the Ramsgate
Hotel.
- Ms
Bell referred to Council wide PDC 219, which deals with the height of
development sites abutting residentially zoned sites. Ms
Bell also referred to
Council wide PDC 129, which says:
The form of ... buildings of three storeys height or greater above natural
ground level at any point on the site, should be designed
to reduce the visual
impact of the extra height of the third storey or above by:
(a) providing differentiation in elevational treatments to reduce overall
building bulk and enhance streetscape character;
(b) articulating the building elevation and avoiding large, unrelieved
walls;
(c) incorporating balconies, verandahs or other elevational treatments to add
interest to the building and reduce its apparent bulk
as viewed from a public
road or the coast, and
(d) increasing setbacks to side and rear boundaries at upper
levels.
- Ms
Vines’ objection to the height of the proposed building related to her
perception that it would contribute to making the
building too dominant an
element in the locality, especially having regard to the heritage value of
individual buildings and areas
in the locality. Ms Vines thought that the
building would be too high for too great a width. The concerns of both Ms Vines
and
Ms Bell with respect to the height of the building related to the
Seaview Road frontage. The building height at the Military
Road frontage will
be well within the upper height provided for in PDC 5 for the Neighbourhood
Centre (Henley Square) Zone.
- The
directly applicable provisions of the Development Plan concerning height all
refer to natural ground level as a starting point.
This is unhelpful in
relation to the site with which we are here concerned, because the land form,
which would originally have been
a sand dune, was modified long ago. It is not
possible now to ascertain precisely what natural ground level might have been,
and
neither would it have been possible at the time that the provisions of the
Development Plan which use the term were introduced.
We accept the evidence of
Mr Smith, based upon his research into topographical information about the site
and the land around it,
that it is probable that the original sand dune on the
site varied between 7.5 and 9.5 metres above AHD at the northern end of the
site, and between 7 and 7.5 metres above AHD on Seaview Road abutting the
existing shops.
- Ms
Bell, in assessing the height of the proposed building, chose to take as her
starting point a straight line between the height
of Seaview Road, which is at
approximately 7.1 metres above AHD, and Military Road, which is some metres
lower. Ms Bell’s
starting point was neither natural ground level,
finished ground level nor existing ground level. There is no sensible
justification
for this approach, and we reject it.
- The
ground of the site presently rises in places in the order of one metre above
street level. We do not consider that it was intended
by the drafters of the
development plan that “natural ground level” be the level of the
road. It is readily apparent
that the ground east of Seaview Road rises to a
level above it.
- The
Development Regulations, in Schedule 1, define “building
height”:
“building height” means the maximum vertical distance between the
natural or finished ground level at any point or any
part of a building and the
finished roof height at its highest point, ignoring any antenna, aerial,
chimney, flagpole or the like.
- Mr
Smith said, in his statement:
The building is to have maximum levels of 20.25 metres AHD or thereabouts, at
the uppermost point of the “winged” roof
element, and a height
varying between about RL 18.95 (ceiling level) and 20.25 metres along most of
the Seaview frontage.
- We
accept this assessment. It means that the height above Seaview Road to the top
ceiling level is about 11.85 and the height above
Seaview Road to the tip of the
winged roof element is about 13.15 metres AHD. We do not consider, however,
that the level of Seaview
Road was intended to be the starting point for the
calculation. We consider that a level at least one metre higher than the level
of the road was intended to be the starting point.
- Mr
Hayes argued that the figure of 10.2 metres was intended to indicate that
buildings should not be higher than three storeys high.
There are Development
Plan provisions which link the 10.2 metre height with three storeys. We reject
Mr Hayes’ argument
on this point. We can see no planning purpose to
be served in a limitation on the number of storeys of a building in this
context.
A height limitation by reference to a measurement has been chosen to
indicate the scale of building intended for the area.
- The
height levels provided for in the Development Plan are important provisions.
However, they must be read in conjunction with all
of the other relevant
provisions, and with the desired future character statement for the relevant
area. They should not be applied
as if they were mandatory provisions. The
provisions regarding height levels are one factor in an assessment which must
also take
into account the physical characteristics of the site and the
buildings around it, as well as the existing character of the locality.
Having
regard to all of those matters, we do not consider that the fact that the
proposed building will exceed the height provided
for in PDC 5 for the
Neighbourhood Centre (Henley Square) Zone and in Council wide PDC 219 is fatal
to it. The visual impact of
the height of the proposed building will be
significantly ameliorated by the setback of the third residential storey from
the ground
floor front building line. In our assessment, the height of the
building will be in proportion with the building’s width viewed
from all
vantage points, including vantage points to the west, and the height of the
building will not cause the building to dominate
the locality or Policy Area 51.
Heritage/Military Road frontage
- The
desired future character statement of Policy Area 52
says:
This Policy Area surrounds the historic centre of the Zone and comprises a mix
of uses, such as a small supermarket and a wide range
of shops, offices,
restaurants and other uses. Additional activities which reinforce existing uses
are appropriate, as well as shop
top housing.
Development should be built to the street frontage and of contemporary modern
design. Car parking should be to the rear or side
of premises and where
possible, shared. The pedestrian environment should be enhanced with verandahs,
pergolas and awnings to provide
pedestrian
protection.
- There
are two principles for Policy Area 52. Principle 2 designates the former police
station at 206 Military Road, which is opposite
the site, as a Local Heritage
Place. Principle 1 says that development should be in accordance with the
desired future character
of the policy area.
- The
proposed development conforms closely with the desired future character of
Policy Area 52.
- Both
Ms Bell and Ms Vines were of the view that the proposed building would be
incompatible with the adjoining areas, and in particular
with the Residential
Heritage (Conservation) Zone to the east and Policy Area 51 to the west. Ms
Bell and Ms Vines were particularly
concerned about the interface between the
Military Road frontage of the proposed development and the Residential Heritage
(Conservation)
Zone. The Residential Heritage (Conservation) Zone abuts the
site for only a short distance at the north east corner of the site.
For most
of the eastern boundary of the site, the properties on the other side of
Military Road are within the Neighbourhood Centre
(Henley Square) Zone, and the
desired future character for Policy Area 52, quoted above, applies to those
properties. The Military
Road frontage of the proposed development, which
includes the loading dock, will be visible from the properties on York Street.
We do not consider, however, that this will compromise the amenity or character
of those properties, or interfere with the achievement
of the objectives of the
Residential Historic (Conservation) Zone. Ms Vines and Ms Bell viewed the
Military Road frontage of
the proposed development as being too much of a
service area. They would both have preferred to see an “active
frontage”
to Military Road, so that that frontage would, for example, have
shop fronts. The use of the site for a supermarket and specialty
shops is in
conformity with the objectives of the Zone. Supermarkets and specialty shops
must be serviced from somewhere. The options
in relation to this site are Main
Street, Seaview Road and Military Road. It seems to us that the Military Road
option chosen is
by far the best option, and, in any event, is an acceptable
option.
- Ms
Bell and Ms Vines both thought that the supermarket proposed would be too large,
and that the size of the supermarket was the cause
of many of the aspects of the
development they considered to be unsuitable. Ms Nolan’s evidence was
that a supermarket of
2,540m² was on the smaller end of the scale of what
is expected in a Neighbourhood Centre. We accept Ms Nolan’s evidence
in
this respect. We consider that the supermarket proposed is an appropriate size
for the Zone and the Policy Area.
- Council
wide PDC 184 says:
Development adjacent to or within the vicinity of a State or Local Heritage
Place should respect and complement the character of
such a place in terms of
scale, built form, materials and external finishes, and contribute positively to
the value of the heritage
place.
- We
do not consider that the proposed development will have any adverse impact on
the State and Local Heritage Places in its vicinity.
The Development Plan seeks
development of a contemporary modern design in Policy Area 52, and the proposed
development is of such
a design. The Seaview Road frontage of the proposed
building, which runs close to the property boundary, together with the verandahs
proposed for that frontage, will contribute to the achievement of the ambience
sought in Policy Area 52.
- The
Desired Future Character Statement for Policy Area 51 seeks a lower scale of
development for that Policy Area than for Policy
Area 52. Mr Schulz assessed
the impact of the proposed building on the heritage places and the heritage
areas. He said, in his
statement:
... the proposal utilises techniques that are typically employed in classic
architecture and can be readily seen in the surrounding
heritage places, in
particular the State Heritage listed Ramsgate Hotel. Both buildings provide a
clearly defined base, middle and
top to the overall building form. This overall
form is then articulated in several hierarchical layers, from the broader
overall
architectural rhythm, to the creation of general depth and shadow, to
the finer grain use of materials and specific detailing.
While the proposal generally utilises differing materials and external finishes,
I do not consider this to be of consequence in terms
of its compatibility with
the surrounding heritage places, as a successful built for [sic] relationship
can be achieved through the
careful use of a select few techniques. Overuse of
replicating techniques can often result in tokenistic, literal, or compromised
built form solutions.
The approach utilised by the proposed development also creates a compatible
‘urban texture’ which I also consider to
be highly relevant to
achieving a compatibility to surrounding built form (CW PDC 25, 27; NC(HSq)Z PDC
4), heritage or otherwise,
than the simplistic replication of roof forms, window
proportions or use of specific materials [sic].
Coupled with this, the development’s provision of additional activity,
colour, form, population and urban texture to the locality,
which is consistent
with that of the broader surrounds, continues the historic ongoing pattern of
the development which I feel [sic]
an essential element to the broader cultural
landscape setting to the heritage places.
In this context, I am satisfied that the proposal’s scale, built
form, materials and external finishes are both respectful and
complementary to the heritage value of the State and Local heritage
places in the HSqH(C)PA, and that the continuation on the ongoing historic
pattern of development contributes positively to the value of the heritage
place (CW PDC 184, NC(HSq)Z DFC, Obj 6, PDC
6).
- We
accept Mr Schulz’s evidence.
Summary and Conclusion
- The
proposed use of the site is in conformity with the objectives for the
Neighbourhood Centre (Henley Square) Zone and Policy Area
52. Having regard to
all of the evidence, and to the relevant provisions of the Development Plan, in
our assessment the proposed
development has an appropriate and functional
layout. It is of an acceptable design, height, bulk and scale. It will not
have an
adverse impact upon any Local or State Heritage Place, nor will it have
an adverse impact upon Policy Area 51 or the Residential
Heritage (Conservation)
Zone. The proposed development will enliven the Seaview Road frontage of the
site and assist in the creation
of the ambience sought for the area by the
Development Plan.
- The
decision of the Council to refuse to grant development plan consent to the
proposed development will be reversed. Development
plan consent will be granted
to DA 252/3093/07.
- A
memorandum in the above terms was provided to the parties. The parties
conferred in relation to conditions and made submissions
to the Court. The
development plan consent will be subject to the following conditions:
- The
proposal shall be developed in accordance with the details and approved plans
forming exhibit A1 in ERD 164/08, together with
the stormwater and site
management plans referred to in Conditions 21 and 22 below, except where varied
by the conditions herein,
and shall be completed prior to the buildings being
occupied.
- All
parking areas must be marked in a distinctive fashion, to delineate the parking
spaces, prior to the occupation of the proposed
development.
- All
car parking spaces, driveways and associated manoeuvring areas shall be sealed
in bitumen, concrete or brick pavers prior to the
occupation of the proposed
development.
- The
proposed car parking layout and access areas are to conform to the
Australian/New Zealand Standards 2890.1:2004 for Off-Street
Parking
Facilities.
- The
proposed landscaping shall be established on the site in accordance with the
approved plan prior to the occupation of the development,
and it shall be
maintained and nurtured at all times by the applicant or person(s) obtaining the
benefit of this consent, with any
diseased or dying plants being replaced.
Trees shall be a minimum height of 1.5m at the time of planting.
- The
hours within which the proposed development is permitted to operate shall be as
follows:
Supermarket
Monday to Friday 7.00am to 9.00pm
Saturday 8.00am to 5.00pm
Sunday 11.00am to 5.00pm
Retail/Speciality Shops numbered 1-15
Every day excluding Thursday 7.00am to 6.00pm
Thursday 7.00am to 9.00pm
- The
underground carparking areas shall be open for use between 7.00am to 11.00pm on
Monday to Thursday, 7.00am to 2.00pm the following
day on Friday and Saturday
and between 7.00am to 12.00 midnight on Sunday.
- The
loading and unloading facilities for commercial vehicles must conform with
Australian Standard 2890.2-2002.
- Delivery
trucks shall only access the site between 7.00am and 5.00pm Monday to Friday and
9.00am to 5.00pm Saturday, Sunday and Public
Holidays.
- The
access points to the underground car parking area and the delivery area must be
appropriately and clearly marked with signs to
prevent confusion or conflicts
between delivery vehicles and passenger vehicles and to prevent unwanted vehicle
movements.
- The
proposed building must be treated with an anti-graffiti application at ground
floor level prior to its occupation.
- Proposed
access points shall comply with the criteria for safe intersection sight
distance as specified by the Austroads Publication,
Guide to Traffic
Engineering, Part 5 - Intersections at Grade.
- Delivery/service
vehicles shall enter and exit the loading dock area by means of a left in and
left out movement only.
- Lighting
shall be provided under the cantilevered verandah and canopy along Seaview Road
to illuminate walkways prior to the occupation
of the development.
- Loading
dock doors must be closed at all times except during the entry/exit of
vehicles.
- The
loading dock panel lift doors must be a minimum of 16mm thick.
- All
openings in the walls/roof of the loading dock must be acoustically treated.
This includes any louvres, which must be Fantech
SBL 2 or acoustic equivalent,
having the following sound transmission loss:
|
Static Insertion Loss Octave Band Centre Frequency
|
|
Fantech SBL2
|
63
|
125
|
250
|
500
|
1000
|
2000
|
4000
|
8000
|
|
Sound Transmission Loss
|
5
|
10
|
14
|
22
|
27
|
25
|
21
|
17
|
- The
angled exit point leading from the at-grade car park and Military Road must be
increased to 45 degrees to reinforce the left only
movement onto Military
Road.
- The
plantings adjacent to the building must not interfere with the sightlines in and
out of the carparking areas or the unloading
areas. Ground cover must be kept
below one metre in height and taller plantings must have clean trunks (clear of
branches) to a
height of two metres at all times.
- Closed
circuit television cameras must be installed in the places designated on the
approved plans and monitored by an appropriately
qualified firm during normal
business hours. A security guard shall be engaged by the applicant to monitor
the land after normal
business hours until the closing time of the underground
car park.
- The
applicant must prepare and submit to the Council a stormwater and site
management plan and computations in accordance with Council’s
Development
Information requirement Guide No. 9, Stormwater Drainage Plan and Guide No. 3,
Site Plan and to the satisfaction of the
Council. In accordance with Guide No.
9, on-site stormwater detention must be provided based upon the post development
peak rate
of run-off from the design storm not exceeding that from the
pre-development site from a 5 year ARI storm. The design storm requirement
is
for a 100 year ARI storm. All stormwater runoff generated by the proposed
development must be collected and disposed of without
jeopardising the safety of
the adjoining road network. In order to contain major storm street gutter
flows, measures must be specified
to form a continuous barrier along or near and
within the frontage of the land (including the driveway) at a minimum of 300mm
(c.f. proposed
225mm for the access ramp to the undercroft) above the
adjacent street WT levels.
- Measures
must be incorporated to minimise the risk of failure during a storm of
undercroft/basement pump systems, such that:
22.1 It must be demonstrated that the system will protect the
building from inundation from a 100 year ARI storm over the site.
22.2 Two pumps shall be provided, each capable of the design flow rate.
22.3 The pumps shall be configured to automatically alternate as the duty
pump.
22.4 The system shall be configured to automatically revert to the
alternative pump should the duty pump fail; and
22.5 Either a back-up power supply or a safe power failure storage (below
and/or above ground) with a volume equal to a 5 year ARI,
4 hour duration storm
run-off without pump operation and without flooding of buildings, under-crofts
or any properties, shall be
provided.
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