ordinary meeting of council to be held on tuesday, 26 april 2005 at ...

Ordinary Meeting <strong>of</strong> Council - 26 April 2005 7 / 5
Item 7
DA1572/03
12 April 2005
SUMMARY
Reece Pty Ltd submitted a DA No.1572/03 for a two s<strong>to</strong>rey commercial development and
associated car parking at 8 West Street, Pymble that was approved by Commissioner Hussey in the
Land and Environment Court on 14 Oc<strong>to</strong><strong>be</strong>r 2004, with four deferred commencement provisions:
Revised s<strong>to</strong>rmwater plans and details, drawings C1-C7 Revision A, dated 16 February 2005, as well
as structural drawings S1-S18, Revision A dated 18 Novem<strong>be</strong>r 2004, prepared by Appleyard
Forrest Consulting Engineers Pty Ltd was submitted. Overall, the design was found <strong>to</strong> <strong>be</strong> in
accordance with DCP 47 requirements and is considered satisfac<strong>to</strong>ry.
By virtue <strong>of</strong> the requirement <strong>to</strong> locate the building <strong>to</strong> the western boundary situated over the current
drainage system comprising a 1050mm diameter pipeline and easement, substantial infrastructure is
required for the relocation. Works involve an installation <strong>of</strong> an upsized pipe line <strong>to</strong> 1200mm
diameter, provision <strong>of</strong> bolt pit lids <strong>to</strong> prevent surcharging due <strong>to</strong> a pressured pipeline, <strong>be</strong>nching in
pits, as well as provision <strong>of</strong> removal slab panel <strong>to</strong> allow continued access for maintenance. The
redundant 1050mm pipeline within No.8 is <strong>to</strong> <strong>be</strong> removed and the trench backfilled.
The property is vulnerable <strong>to</strong> overflows from a sag drainage pit fronting the site which collects
s<strong>to</strong>rmwater run<strong>of</strong>f from Suakin, Bridge and West Streets. An overland flow route is designed <strong>to</strong>
convey the flow in accordance with DCP47 requirements, with the provisional hazard rating
although high, dose not pose risk <strong>to</strong> the public given the flowpath inaccessibility. Flows are
controlled through the site by the use <strong>of</strong> dwarf masonry walls and are considered satisfac<strong>to</strong>ry.
To support the elevated access ramps in<strong>to</strong> the building, several bored piers adjoin the easement, but
are not considered <strong>to</strong> pose any future risk <strong>of</strong> loading in the zone <strong>of</strong> influence for the pipe with the
piers <strong>be</strong>ing founded on naturally occurring sands<strong>to</strong>ne.
It is considered <strong>of</strong> mutual <strong>be</strong>nefit, that extinguishment and creation <strong>of</strong> a new easement <strong>be</strong> pursuant
<strong>to</strong> Section 88B <strong>of</strong> the Conveyancing Act 1919 and address, a 2.2 metre wide and variable easement
over the 1200mm diameter pipeline and pits, <strong>be</strong>nefit for discharge <strong>of</strong> private s<strong>to</strong>rmwater in<strong>to</strong> the
pipeline, Restriction on Use for the overland flow path including terms in the easement <strong>to</strong> place
maintenance cost arising from the adjacent structure on<strong>to</strong> the property owner. All necessary
documentation must <strong>be</strong> carried out prior <strong>to</strong> issue <strong>of</strong> Occupation Certificate.
It is impractical in this instance <strong>to</strong> restrict the area over the pipeline from heavy construction
machinery during construction. Following completion <strong>of</strong> the building, the applicant should
undertake an inspection <strong>of</strong> the pipeline by CCTV with a copy supplied <strong>to</strong> <strong>council</strong> for verification
prior <strong>to</strong> issue <strong>of</strong> Occupation Certificate.
If approval is given, the relocation works and removal <strong>of</strong> the existing pipeline must <strong>be</strong> completed
prior <strong>to</strong> commencement <strong>of</strong> the building.
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