AGENDA - Sunshine Coast Council

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Strategy and Planning Committee Agenda 16 February 2011 Note that at the time of deciding future development applications future policies which may be in force and applicable to future development applications over the site such as the SPP Coastal Protection may result in higher minimum development levels. 29. All allotments within the low density residential precinct and multi unit residential precinct associated with this preliminary approval shall fall at least 1:200 to the road reserve with the exception of lake front allotments where the embankment slope to the lake shall not be steeper than 1:6 and the building platform of the allotment shall fall at least 1:200 to the road reserve; 30. All overland flowpaths from existing residential areas draining through the Preliminary Approval area shall be maintained such that peak flood levels in existing areas during peak local and regional 100 year Average Return Interval freshwater flood and stormtide events do not increase above existing peak flood levels. This requirement must be demonstrated in the instance of a fully blocked underground drainage system. With the application for the first stage of subdivision associated with this Preliminary Approval the applicant is to submit and have endorsed by Council’s delegate a Stormwater Quantity Management Strategy for the entire preliminary approval area detailing how overland flows from existing residential areas will be managed; 31. Stormwater from the development associated with this Preliminary Approval must be treated to current best practice using WSUD treatment devices prior to discharge to the lake or marina area. With the application for the first stage of subdivision associated with this Preliminary Approval the applicant is to submit and have endorsed by Council’s delegate a Stormwater Quality Management Strategy for the entire preliminary approval area; 32. With each application for subdivision associated with this Preliminary Approval the applicant is to submit a Detailed Stormwater Quantity Management Plan which shall be in accordance with the Stormwater Quantity Management Strategy for the entire preliminary approval area. The Detailed Stormwater Quantity Management Plan must detail all overland flowpaths within the application for subdivision. All overland flowpaths shall be either drainage reserve or road reserve and designed in accordance with Council’s Development Design Planning Scheme Policy and Queensland Urban Drainage Manual; 33. With each application for subdivision associated with this Preliminary Approval the applicant is to submit a Detailed Stormwater Quality Management Plan which shall be in accordance with the Stormwater Quality Management Strategy for the entire preliminary approval area. The Detailed Stormwater Quality Management Plan must demonstrate how WSUD devices designed in accordance with Council’s Development Design Planning Scheme Policy and the latest version of the WSUD Technical Design Guidelines for South East Queensland (Healthy Waterways Partnership) to treat stormwater to current best practice prior to discharge to the lake/canal will be integrated into the development, and how it is intended to effectively manage stormwater, sediment and other run-off from the site to prevent adverse impact on wetland values; 34. Stormwater from all business, commercial, industrial and residential use classes with the exception of display dwelling, dwelling house and duplex shall be treated to current best practice prior to discharge into Council’s stormwater system and shall not be treated further within Council’s stormwater system prior to discharge to the lake/canal Page 86
Strategy and Planning Committee Agenda 16 February 2011 35. The developer shall design and construct the lake, marina, canal extension and its associated infrastructure in accordance with Council’s Development Design Planning Scheme Policy to: • ensure regular inflow of saline water from the Pumicestone Passage to the lake, marina and canal extension; and • maintain adequate water circulation within the lake using a system generally in accordance with the Pelican Waters Southern Lake – Lake Water Quality Investigation (Cardno Lawson and Treloar, August 2010) to produce a maximum 22 day turnover with the Lamerough Canal under both current climate and year 2100 considering projected sea level rise of 0.8m; and • ensure that the water quality of the lake, marina and canal extension (excluding bottom and near bottom waters) complies with the flowing water quality criteria: Environmental Protection (Water) Policy 2009 Pumicestone Passage environmental values and water quality objectives - a) turbidity: < 8 NTU b) suspended solids: < 25 mg/L c) chlorophyll a: < 8 µg/L d) total nitrogen: < 450 µg/L e) Oxidised N: < 15 µg/L f) ammonia N: < 30 µg/L g) inorganic N: < 400 µg/L h) total phosphorous: < 30 µg/L i) filterable reactive phosphorous: < 10 µg/L j) dissolved oxygen: 80 – 105% saturation k) pH: 7.0 – 8.4 l) secchi depth: > 0.5 m Toxicants in Water and Sediment as per Australian and New Zealand Water Quality Guidelines (2000) - m) Aluminium and iron at concentrations to comply with accepted limits conducive to the protection of estuarine and marine ecosystems and aluminium and iron at concentrations not prejudicial to human health Microbiological and Physio-chemical standards as per the National Health and Medical Research Council Guidelines for Managing Risks in Recreational Water (2008) - n) Cyanobacteria/algae - Karenia brevis: < 10 cells/mL o) Intestinal enterocicci: 95 th percentile ≤ 40 organisms per 100 mL. The above water quality criteria apply with respect to the finished component of the lake, canal and marina within each stage as well as the ultimate configuration of the lake, canal and marina. In the event that the water quality criteria are not being achieved, and the developer can demonstrate that the criteria is not being achieved due to the influence of the water quality of in flowing waters from the Lamerough Canal system, then the water quality criteria shall default to the median water quality values (the “Default Criteria”) sampled and measured in Lamerough Canal at the entrance to the Pumicestone Passage at the finish of an incoming tide; The “Default Criteria” shall only apply during the monitoring period that water quality within the lake / canal / marina system has been detrimentally affected by inflowing waters from Lamerough Canal; Page 87
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AGENDA - Sunshine Coast Council

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