Upgrade of the Water Treatment Plant which services the Brogo-Bermagui network to improve water supply reliability and quality.
Bega Valley Shire Council is about to commence the construction of the Brogo Water Treatment Plant (WTP). The WTP will improve the reliability and quality of drinking water to the Brogo-Bermagui system, which includes the townships of Quaama, Cobargo, Wallaga Lake and Bermagui, as well as rural customers connected to trunk mains.
The existing facility is made up of a chlorinator and balance tank, which can only provide a single, disinfection treatment step to raw water from the Brogo River. While this has served the community reasonably well for the past 30 years there are numerous occasions when boil water notices have been issued due to the quality of water in the Brogo River.
The recent bushfires over the 2019/2020 summer were a reminder of the vulnerability of the current water treatment process to changes in river water quality, with water required to be trucked into the network at a significant cost until the raw water quality improved.
The upgrade includes the introduction of a ‘filtration step’ using a Dissolved Air Flotation and Filtration (DAFF) unit. This unit will float contaminants to the surface where they are removed before passing through a media filter. This will bring the water supplied to the Brogo-Bermagui into alignment with the Australian Drinking Water Guidelines.
As part of the upgrade, a fluoridation step is to be included, to assist in the prevention of tooth decay and the minimal occurrence of any adverse dental effects in accordance with the New South Wales Code of Practice for Fluoridation of Public Water Supplies. The upgrade will also include pump stations, water storage tanks and other water treatment equipment required to allow the WTP to operate.
The key objective of the WTP upgrade is to improve water quality standards to bring in line with the rest of NSW, by consistently providing clean and safe drinking water to consumers through a broader range of raw water quality events.
Safe and Secure $10.7m.
This project is connect to Council's Community Strategic Plan through Outcome 3; Goal 6; Strategy 13 and Outcome 4; Goal 8; Strategy 18.
What has the planning process for the project involved so far? GHD Pty Ltd was engaged by Council in the role of Owners Engineer for the upgrade of the WTP. This includes preparing a Review of Environmental Factors (REF). The purpose of the REF is to describe the proposal, to document the likely impacts of the proposal on the environment, to detail mitigation measures to be implemented, and to determine whether the proposal can proceed. In doing so, the REF helps to fulfil the requirements of Section 5.5 of the Environmental Planning and Assessment Act 1979; that Council examine and take into account to the fullest extent possible all matters affecting or likely to affect the environment by reason of the activity.
Council has awarded the Design and Construct Contract to LC Water Pty Ltd. Construction is due to commence shortly.
Project & Contract Management Officer
Bega Valley Shire Council
Phone: (02) 6499 2222
The timeline of the upgrade process is outlined below: