Gis
4

3. Proposed Sanitary Works

in order to provide sanitary service to all these future
developments, certain work needs to be done to improve
the capacity of the present sanitary system. Upon
analysing the system, it was found that the sewers
leading into the pump station and the force main leading
out of the pump station are both adequate to service the
future developments. Work required to upgrade the system
includes a new pump station and an extension of the.
existing sewer from Manhole 16A-6 southwards to Lobb
Avenue to provide a common discharge point to all future
developments (see attached Figure 2). The new pump
station would consist of two 19 HP submersible pumps
housed In a chamber 2.4 m square x 11 m deep. For
emergency storage, another similar interconnecting
chamber needs to be built to provide the necessary
emergency detention time. 50 m of 200 mm sewer together
with two manholes would also need to be buiit.

Cost of Works

Estimated cost of the proposed works in 1987 dollars are
worked out as follows:

Pumo Station

Precast concrete chambers
Mechanical

Sales tax

Civil works

$118,105

Sanitary Sewer

Sewer
Manholes

Soil investigation

Contingencies 154