Thanks Iouri we always ...

Thanks Iouri

we always allow for potential population growth within any long term investment decisions including new service reservoirs - usually 25 years forward as this is the data we can usually attain. My question is more about the resilience capabiltiy of the reservoir to continue to supply customers downstream when the inlet source is interrupted - either through a burst main or a failure at a treatment source. It is always a question of how much of a risk are you prepared to take and how you are able to manage the impact from within your normal business emergency planning capability. Obvioulsy if we have over capacity it costs more to build and makes managing the water quality of the stored water that little bit more difficult, too small and its ability to provide customers with resilient supply of water is compromised!

I really dont think there is a definitive answer but a compromise position hence the question to others as to how they reach this decison

Thanks

Mick