Outline
of Requirements
We received
an initial approach from the consultant acting
as designers for the Water Authority to provide
technical assistance in preparing a design for
upgrading the discharge from the site from around
10l/s to 37l/s to alleviate surcharging / flooding
during storm conditions of surrounding properties.
Design and subsequent installation
works to be carried out under partnering agreement
between Pims Pumps /The Water Authority and the
consultant.
Constraints placed on the design
by the capacity of the receiving treatment works
resulting in normal Day to Day dry weather flows
(DWF) from pump station were not to be increased
but under storm conditions discharge to increase
to 37l/s.
Further constraint placed on
us in that any modification works to station must
be contained within the confines of an already
limited space.
Site investigations were carried
out to ascertain existing level of equipment and
space available. Pims then involved with ongoing
design works and meetings to formulate a solution
Various designs were considered
to arrive at a solution that best fitted the Water
Authorities Constraints and those of the space
available.
Pims
Pumps Proposal
The final solution comprises
of a 3 pump system with 2 DWF pumps operating
on a duty / standby basis discharging around 9.5l/s
down the existing 100mm rising main and a third
storm pump discharging around 27.5l/s in storm
conditions through a new 200mm OD PE pressure
pipe.
Pims meetings with the Water
Authority operations highlighted a requirement
for flexibility in using both rising main with
a combination of pumps in emergency’s and
a pipeline design in the pump station was undertaken
to provide this facility.
Once design finalised Pims pumps
project managed preparation of a surge analysis
report for both the existing and new rising mains.
Benefits
to Client
One stop shop for client for
design works, surge analysis, procurement of equipment,
installation and commissioning.
Partnering enables parties to pull together and
arrive at a solution that best suits the clients
technical and financial objectives.
Specialist design appraisal of available options
and advantages / disadvantages of each.
