Page 3088 - Week 10 - Thursday, 15 September 1994
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MINISTER FOR THE ENVIRONMENT, LAND AND PLANNING
LEGISLATIVE ASSEMBLY QUESTION
QUESTION NO 1370
Dual Occupancies - Banks
Mr Cornwell - asked the Minister for the Environment, Land and Planning - In relation to the 58 dual occupancy developments approved or active in the suburb of Banks -
(1) How will the infrastructure of the suburb, ie water, sewerage, cope with this additional increase in density.
(2) Will supplementation of such infrastructure be required and; if so, at what cost.
Mr Wood - the answer to the Members question is as follows:
(1) The design of Canberras water supply reticulation is based on demand allocated to
specific land use. For suburban residential areas such as Banks a single peak-hour
demand is utilised for standard detached housing, group housing, duplexes and flats
- both low and high rise. Basically the infrastructure in Banks is considered
adequate to cater for current and anticipated future development. There are two
factors that may have lead to a perception of inadequate water supply in Banks.
Firstly, up until November 1993 Banks was supplied directly from the bulk supply
main from Mt Stromlo, via pressure regulating valves, but the pressure setting on
those valves was found to have been set higher than was required. In November
1993 the Conder Reservoir was commissioned and the pressure in Banks would
have been controlled by the elevation of that reservoir at a lower, but still quite
adequate pressure.
Secondly, 375 mm main is to be constructed in the future to link south Banks to the inlet/outlet main from Conder Reservoir. Until this main is in service there are number of high level blocks in south east Banks that may have experienced water pressures slightly below normal during summer peak demand periods.
The design of Canberras sewerage system is also based on parameters associated with specific types of land use. For suburban residential areas such as Banks, a single parameter is applied for high density use. Overall, the suburb of Banks is viewed as being low to medium density residential, although some pockets may approach a high density of land use if there is extensive dual occupancy construction. Even with this density the water and sewerage infrastructure is designed to cater for anticipated future development.
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