13.2 The Wallis Lake Estuary Management Committee - Great Lakes ...

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Wallis Lake Estuary Management Plan 4 Action plans 4.1 Water quality and flow Management Objective Minimise the pollutant load to the estuary from urban stormwater drains during periods of rainfall. ‘Pollutant’ refers to organic contaminants, suspended solids, nitrogen, phosphorous, pathogens, heavy metals and gross pollutants W.1 Management Area A, B, C, D Action No Action Indicative Cost W.1.1 Implement the Wallis Lake stormwater management plan $200,000 per year W.1.2 Conduct creek rehabilitation of existing drainage lines/stormwater channels to enhance nutrient reduction mechanisms in-stream at Pennington Creek, Wyuna Creek, Dunnes Creek, Pipers Creek, Muddy Creek W.1.3 W.1.4 W.1.5 W.1.6 Prepare protocols for the frequency of maintenance/clean-out of SQIDs and regular clean-out stormwater GPTs , and conduct regular maintenance of all SQIDs and GPTs in accordance with this protocol Develop and implement a scientific monitoring program to assess the effectiveness of recently constructed SQIDs and assess the need for any new SQIDs Develop and implement a water sensitive urban design DCP for all future urban developments in the Great Lakes Shire Continue to enforce the GLC sediment and erosion control policy 1995 for all urban developments Priority Responsibilities Progress Immediate (B2) GLC Creation and maintenance of 8 artificial wetlands Tree planting in Pennington Creek and testing of water quality in Pennington and Dunnes Creeks through the Waterwatch program $25,000 High (C2) GLC, Waterwatch $5,000 + $40,000 per year Medium (B5) GLC $20,000 Medium (B5) GLC $10,000 Medium (B5) GLC Progress paused due to development of BASIX by DIPNR – to resume after July 2005 ∗ Staff time Medium (B5) GLC Ongoing ∗ DIPNR introduced the Building Sustainability Index (BASIX) as a planning tool to assess water and energy efficiency of new residential developments. A BASIX certificate will only be approved for proposed developments that will be built to use 40% less mains supply water and produce 25% less greenhouse gas emissions (increasing to 40% from July 2006). 22
Wallis Lake Estuary Management Plan Comments for strategy W.1 The Wallis Lake stormwater management plan is due for revision in 2005. Creek rehabilitation involves the removal of exotic weeds and replanting of native species, removal of litter, and measures to minimise erosion. In 2004 an external reference group of members of the building and development industry and an internal reference group from GLC began development of a DCP embracing water sensitive urban design. The proposed DCP covered all scales of development from the allotment scale to the development scale and included industry and tourism as well as residential developments. The introduction of BASIX by DIPNR has temporarily halted the development of the DCP, however; progress will resume after July 2005 when all new residential developments in NSW must gain a BASIX certificate for development approval. Development of the DCP for the Great Lakes Shire should then resume, focusing on aspects of water sensitive urban design not covered by BASIX. [Plate 4.1: Pennington Creek; a site for creek rehabilitation] 23
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