Annual Report 2009/2010 - Hawkesbury City Council - NSW ...

Windsor Sewerage Scheme
The sewerage system consists of two treatment plans, 24 pump stations, 26 kilometres of pressure rising
mains and approximately 146 kilometres of reticulation.
The estimated funds required to bring the system up to a satisfactory standard is $7.3 million.
The estimated annual expense of maintaining the system at a satisfactory standard is $1.418 million.
Maintenance of the Windsor Sewerage Scheme incorporates works carried out in three areas of operation as
follows:
1. Treatment plants
2. Pump stations and rising mains
3. Reticulation/carrier mains
1. Treatment Plants
McGraths Hill Sewerage Treatment Plant
The current plant has design capacity to serve around 9,500 people. Minor upgrading of the plant is carried
out annually with the present condition of the plant considered to be good.
In 2009/2010 a sum of $232,927 was spent on maintenance exclusive of overheads, power costs and effluent
testing.
It is programmed for this sum to be varied as required to maintain the plant to a good standard.
South Windsor Sewerage Treatment Plant
The treatment plant has a current carrying capacity 27,000 EP (equivalent population). The current load is
18,000 EP.
In 2009/2010 a sum of $684,694 was spent on maintenance at the plant exclusive of overheads, power costs
and effluent testing.
2. Pump Stations and Rising Mains
The catchment is serviced by 20 major and 4 minor pump stations, which are all generally in good condition
relative to their age. All stations operate with one duty and one standby pump, with the exception of 6 of the
more recent stations which have been constructed with 2 standby pumps, including two stations with backup
power supply. A new pump station known as Pump Station ‘T’ and associated rising main was commissioned
at Pitt Town to serve the new development. The new station pumps to McGraths Hill Treatment Plant.
Pump station ‘J’ which serves the existing village of Pitt Town is connected to a new rising main and now
pumps to Pump Station ‘T’. The shorter rising main has significantly improved the pumping capacity of the
station.
The remainder of Council’s pump stations have been upgraded to the new SCADA alarm system.
In 2009/2010 a sum of $181,631 was spent on maintenance of the stations exclusive of overheads and power
costs.
3. Reticulation/Carrier Mains
There exists in excess of 149 kilometres of reticulation/carrier mains throughout the catchments.
With the completion of the major CCTV (closed circuit television) survey in 2007/2008, the ten year reline
program commenced in 2008/2009. Approximately 3.2 kilometres of Council’s oldest sewer mains were
2009/2010 Annual Report Page 97