The proposed Twin Waters West masterplan includes increased wetland and animal protection, access points and flooding resilience.
Stockland is proposing significant protections and enhancement of the onsite remnant wetland. This includes a 50 metre minimum natural space buffer from the onsite lake to the wetland. In addition, a solid barrier will be constructed inside the perimeter of the new lake. This will significantly restrict the movement of saline water from the onsite lake towards the wetland, which relies on freshwater.
A network of bioretention basins will be linked to stormwater systems to direct stormwater into the wetland. Enhancements include reduction of weeds and pests within the wetland. Stockland is also working with leading ecologists to ascertain other enhancements to create habitat for more species such as introducing hollows and ‘hides’ for species. No buildings are proposed within the extended wetland area.
The design of the proposed masterplan provides separation and buffers to integrate a new residential community within the project site and surrounds. This includes:
Kangaroos are an enduring feature of the Twin Waters lifestyle. The proposed community design can help coexist with and sustain local kangaroos by:
Flood resilience will be achieved during extreme rainfall events and under climate change scenarios to ensure no increased flooding impacts.
“The Twin Waters West development has been purpose designed to ensure that it does not cause increased flood levels in any areas external to the site, including the existing Twin Waters community.” Dr Trevor Johnson
While the new community is set back around 200 metres from the river, the masterplan will help ensure the site is resilient to large rainfall events, including under climate change scenarios. These measures include:
Ensuring good water quality for the environment is a high priority. ‘Water sensitive urban design’ (WSUD) measures such as rain gardens and vegetated swales are proposed through the Development Application. This approach is consistent with Council and State Government standards to ensure urban stormwater is treated to a very high standard. WSUD systems are included within the wetland buffers to deliver high quality freshwater to the central wetland.
The proposed Twin Waters West lake will be dynamic, with water frequently pumped from a Twin Waters canal. Water within the Twin Waters West lake is replaced around every month, as water slowly flows north to south. The water will be released to the river through an underground pipe at the southern edge of the site. The water quality in the Twin Waters West lake will be similar to the existing Twin Waters canal water, which has very high quality.
A new signalised intersection is proposed at the junction of David Low Way and Ocean Drive, which will also provide road access into Twin Waters West. A ‘collector’ standard road will cross the site with a dedicated cycle lane each way. The road would connect to Twin Waters at the existing roundabout at Stillwater and Esperance Drives. This will create a second entry and exit point for Twin Waters residents to the David Low Way. Pedestrian and cycling connections between Twin Waters West and Twin Waters will be provided at the future connection to the Stillwater Drive - Esperance Drive roundabout.
A Development Application has been lodged with Sunshine Coast Council to seek approval to deliver a premium lake based community of in keeping with the character of the adjoining Twin Waters community.
The proposed masterplan and development application includes low residential density lots, protection of the onsite wetland and provides resilience to flooding for new residents and the residential communities surrounding the site.
The proposed development has been designed to meet stringent State and Local Government guidelines to ensure that there is no net worsening of flooding as a consequence of the proposed application. Extensive modelling has occurred through both the rezoning that was approved by the State Government and Sunshine Coast Council and in the preparation of the current development application including extensive peer reviews.
You can watch a short video that explains the proposed hydrology and flood measures below.
Flooding resilience is achieved by a combination of factors.
The site will be filled to raise the ground and lot levels. This will most likely achieve flooding resilience to the AEP 1% (formerly called 1:100-year event) + climate change to 2100 + an additional 0.5m. During major rainfall events these heights will help to protect the new community, in addition to other measures.
The large, deep lake (17ha) can contain, secure and slowly discharge large volumes of in-flowing stormwater during high rainfall.
During normal day to day operations the lake will be maintained at a much lower level (0.6 AHD) than the filled heights (3.45m to 5.4m AHD) of the developable area to be able to provide capacity to receive and contain high volumes of stormwater.
The stormwater systems will be designed to carry water inwards within the site and towards the new lake and not towards the existing Twin Waters community or other homes outside of the site.
A similar approach is applied on this site, as Twin Waters, which has achieved flood resilience since the 1990s. The same designer, Dr Trevor Johnson, is informing the hydrology system for this site.
You can watch a short video which explains the proposed hydrology and flood measures below.
Yes. Average lot sizes are least 700m2. The smallest lot is 500m2. This is the same as Twin Waters and complies with the Planning Scheme.
Stockland is proposing significant protections and enhancement of the onsite remnant wetland.
Proposed protections include a 50 metre minimum natural space buffer from the onsite lake to the wetland. A network of bioretention basins are proposed to be linked to stormwater systems to direct stormwater into the wetland.
In addition, a solid barrier is proposed to be constructed inside the perimeter of the new lake. This is expected to significantly restrict the movement of saline water from the onsite lake towards the wetland, which relies on freshwater.
Enhancements will likely include reduction of weeds and pests within the wetland. Stockland is also working with leading ecologists to ascertain other enhancements to create habitat for more species such as introducing hollows and ‘hides’ for species. No buildings are proposed within the extended wetland area.
You can watch a short video that explains the proposed enhancements and protections of the central wetland below.
Stockland recognises Kangaroos are an enduring feature of the Twin Waters lifestyle and appeal. The proposed masterplan can help to sustain local kangaroos by:
The proposed 2023 masterplan includes many significant changes compared with the previous proposal. These changes include, but are not limited to:
A new entry road is proposed from the David Low Way into Twin Waters West and a new signalised intersection is proposed to replace the T-intersection at Ocean Drive and the David Low Way.
This diagram indicates the proposed lanes, signalised arrangements, and movements. This is subject to approval.
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