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Lincoln Heath Estate, Point Cook
The
60 ha Australand development, Lincoln
Heath Estate, at Point Cook comprises 589 standard lots, 57 terrace
lots and 4 medium density sites for a further 130 detached and semi
detached dwellings.
There is a further 50 ha parcel to the south of the normal
residential development which is currently zoned for rural living
allotments.
The
normal residential portion of the development falls to Melbourne
Water's Cheetham Creek which discharges into the Sanctuary Lakes
development. Problems with water quality in the lakes
resulted in Melbourne Water changing the drainage scheme such that
a 1.2 ha wetland was required as part of the Lincoln Heath
development.
To
avoid losing prime land for the wetland, Water Sensitive Urban
Design techniques such as a split clean water pipe system, rocky
swales, grassed verges and bio-retention cells were adopted to meet
the required water quality standards of best practice. This
resulted in the final wetland being only 0.35 ha in size at the top
water level. The wetland also acts as a retarding basin and
limits the 100 year storm inflows to five year outflows, thereby
reducing the overland flows along Point Cook Road.
The
resulting water sensitive urban design treatments have been
integrated into the road reserves and public open spaces within the
development to provide an attractive landscape for the
future residents.
The
extremely flat nature of the site required special consideration to
be given to overland flow paths within the estate. The
overland flow paths were modelled using HEC RAS to determine the
top flood level. Allotment levels were set at 300mm above the
top water level.
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