Petitions | Brisbane City Council

Fix the Einbunpin Lagoon

Principal Petitioner Jared Cassidy, Sandgate
Date Closed Wed, 02 May 2018 This epetition has ended
No. of signatures 180 signatures

(View signatures)

Residents draw to the attention of the Lord Mayor the need to invest in a plan to save Sandgate's iconic Einbunpin Lagoon. The Einbunpin Lagoon has been at the centre of Sandgate's commercial hub since the turn of the 19th century. It has played an important role in the community for recreation and also as a water and food source for Aboriginal people long before European Settlement. Having been altered significantly in the 1950s with its only water source being run-off rain water from nearby streets, the health of the lagoon is of significant concern to the community. Hotter, drier winters and sporadic rain means the level and quality of the water in our lagoon is suffering. Council developed a draft management plan in 2005 which proposed a natural wetland filtration area and more natural lagoon walls, planted with native vegetation. This plan would help to address ongoing blue-green algae outbreaks and general water quality and turbidity. This lagoon is much loved by the people of Sandgate and surrounding suburbs and with an investment in its future, generations to come will be able to enjoy it too.

Your petitioners therefore request funding in the 2018-19 Brisbane City Council budget to design and implement a plan for a full wall replacement, natural filtration area and ongoing maintenance to ensure the Einbunpin Lagoon survives for generations to come.

Council response

Thank you for your petitions requesting Council allocate funding in the 2018-19 budget to design and implement a plan for full wall replacement, natural filtration and ongoing maintenance to fix the Einbunpin Lagoon at Sandgate.

Council has completed investigations and considered your requests. It was decided that the petitioners be advised of the following information.

Council acknowledges the importance of the lagoon as a cultural setting for the residents of Sandgate and the blue-green algae outbreaks are of concern. Each year, Council invests in the lagoon’s maintenance. This includes maintenance of infrastructure and vegetation (such as the revetment wall repair in the 2017-18 financial year), removal of litter and the management of water quality involving:

- reticulation, aeration and oxygenation of water

- application of chemical and biological treatments

- water quality monitoring (including blue-green algae and associated toxins).

Despite following the available management actions, this lagoon continues to experience issues with water quality and blue-green algal blooms, due to:

- faecal contamination by native fauna

- high nutrient concentrations in the lagoon’s sediment

- an insufficient quantity of water entering the lagoon to effectively flush the system, meaning that the water in the lagoon becomes stagnant.

Consequently, the establishment of ‘natural-filtration’ systems to improve the quality of water entering the lagoon, as proposed in your petition, is unlikely to achieve the required water quality improvement to reduce the frequency or scale of blue-green algal blooms. Council is continuing to investigate viable treatment options to reduce blue-green algal blooms.

Drivers of blue-green algal blooms in urban lakes are complex and the issue is shared by many other councils managing these types of systems in tropical and subtropical climates. Further investigation into appropriate solutions is required and will be considered as part of Council’s annual budget process and subject to citywide priorities.

Thank you for raising this matter.