Eurobodalla Integrated Water Cycle Management Strategy

152
Eurobodalla Integrated Water Cycle Management Strategy
Existing Water Management System
The area is supplied by the regional water supply scheme, which fills three local service
reservoirs, Tomakin Heights for the small number of houses in Barlings Drive, Burri Point
Reservoir for Rosedale, Guerilla Bay and Tomakin, and Mossy Point for the Mossy Point
and Broulee areas. The Tomakin Heights reservoirs have a combined capacity of 0.2 ML.
The capacity of Mossy Point reservoirs is 4.6 ML and Burri Point is 5.0 ML. Current and
future average and peak day demands are shown in Table 9-19.
During the 1982/83 drought, bores were sunk along Broulee Road, South of Broulee to
provide drought security for the regional scheme. . These bores were used for three months
until the end of the 1983 drought and were subsequently capped.
Recent water quality testing of these bores indicated elevated arsenic iron and nitrate
levels, which may be in part from the past poor management of septic tanks. This has
raised serious doubts over the long term sustainability of these bores Many of the Broulee
residents to date use bore water from their backyard bore, predominantly to water their
gardens.
Table 9-19 Current and Future Average and Peak Day Demands for Tomakin
Current 2032
ADD kL/d PDD kL/d ADD kL/d PDD kL/d
Mossy Point 814 1 791 748 1 646
Burri Point 560 1 233 1 299 2 858
Tomakin Heights 21 46 18 41
TOTAL 835 1 837 766 1 687
A centralised sewage treatment plant located north-east of Tomakin services the three
urban centres and the village of Mogo. The STP provides secondary treatment and is
based on the continuous extended aeration process. After natural disinfection the majority
of the secondary treated water is returned to the environment through direct ocean
discharge. The de-watered and stabilised biosolid is used for rehabilitating Council’s landfill.
There are five stormwater sub-catchments within Tomakin, which include Barlings Beach,
Tomakin, Mossy Point North, Candlagan Creek and South Broulee. The land use within
these areas is primarily residential. Figure 9-11 shows the location of these subcatchments.