THE CORPORATION OF THE
CITY OF PORT COQUITLAM

MEMORANDUM

TO: City Administrator March 12, 1987
FROM: City Engineer

SUBJECT: Fire Flow Requirements In Nerth Mary Hill = Publie
Works Committee March 10, 1987

Recommendation:

1. That a new heated underground Pressure Sensing Station be
constructed at Celeste to replace the existing above ground
station and.that the estimated cost af about $3,000.00 be
taken from the una! located funds in the Water Utility
Budget.

That a stand-by pump suitable for use in the Penny Place
Pump Station be Purchased to be used in the event of
failure of either of the pumps in the existing Penny Place
Station and the estimated cost of $3,000.00 be taken from
the unallocated funds in the Water Utility Budget.

Background and Comments:

The current Mary Hill water Supply fs provided from two
different directions. In the winter time the supply comes from
a high pressure main in the Trenton Street area through a
pressure reducing valve at Belle Place. In the summer this
supply is insufficient and, instead, the area is served by
Pumps at Penny Place which are used to build up the pressure.
Two pumps are available and these may be either both off, one
on, or both on depending on the demand. In order to control!
the pumps, there is a Pressure Sensing Station at Celeste which
sends a signal to the Pumps when the pressure drops below a

predetermined point.

The existing Pressure Sensing Station is always shut down
in the winter for two reasons. The first is that the Penny
Place Pump Station ts not used to Provide water to the area,
and the second is that the Pressure Sensing Station is subject
to freezing, since it consists of tubes filled with water

exposed above the ground.

The problem with the shutdown of the Pressure Sensing
Station in the winter is that if a nigh damand for water jis
placed on our system, the high pressure main from Trenton

Street is not able to provide for the demand. The pumps

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