In the delegate's report this extract was largely repeated. However the delegate specifically noted that the average annual rainfall in the area is around 890 millimetres and concluded that this will readily provide opportunities for each new dwelling and any outbuildings to catch sufficient roof run off to be held in rainwater tanks to serve each lot. The delegate suggested that 200 square metres of roof catchment would yield an annual average of 178,000 litres.
19 The applicants contend that the approved development plan identifies three water supply systems that are proposed to service the residential development on the subject land, namely water tanks collecting water from roofs, dams and aquifers. They then say in relation to the dams that the development plan does not demonstrate that the site, the soil types or the location are appropriate for the use of dams. In relation to aquifers they say that the development plan is not accompanied by results demonstrating that the water is potable and that supply can be assured. The council responds to these contentions, not by asserting that the development plan contained details of the suitability of the land for dams or details of the sufficiency of aquifers, but by submitting that the development plan identifies tank water only as the water supply system to service residential development on the site. In order to determine this matter, I must consider both the meaning of the first sentence of the relevant requirement and also the content and meaning of the approved development plan.
20 The relevant sentence of the schedule to the Development Plan Overlay that I must interpret requires the plan to identify "proposed water supply systems to service residential development on site". In my opinion, "residential development" on site means development intended for or suited for use for residential purposes. Obviously this would include a dwelling. It is also likely to include the construction of a garden surrounding the dwelling and outbuildings normal to a dwelling. However I cannot agree with the submission made by Mr Kane on behalf of the applicants that the expression includes development for the purpose of some agricultural or horticultural pursuit that is likely to be sought to be carried out on the lots to be created in accordance with the development plan. First, I think that the submission does not give proper emphasis to the word "residential". This is a word that is concerned with the living circumstances of persons, rather than with the way in which land might be used in the course of a commercial or quasi-commercial endeavour. Second, if one has regard to the provisions of the Rural Living Zone to which I have referred earlier, it is apparent that rural pursuits in the nature of horticulture, viticulture and the like require a permit. Hence such pursuits should not be assumed to flow automatically from either the fact that a house exists in a Rural Living Zone or from the subdivision of the land subject to the development plan.
21 Turning to the development plan, I acknowledge that it is expressed in language which lacks clarity. However I think it must be interpreted in this way: the lots to be created by a subdivision consistent with the development plan are to provide for residential use in a rural environment and that residential use is to be serviced with water by rainwater collection on roofs directed to a rainwater tank or tanks. It is true that the development plan refers to the fact that there are a number of existing dams on the land and that, subject to the grant of a permit, new dams might be permitted. But, in my opinion, this reference is not designed to identify dams as a water supply system to service residential development on the site; but is designed to indicate water supply systems that may be able to service the land generally and in particular service some agricultural activity on the land. In forming this view I take into account the fact that dams are rarely used to service residential development with water for drinking or, indeed, washing. I also take account of the context in which the reference to the dams is made - that is, as a type of afterthought. As for the aquifers, the question is clearer. The development plan makes it clear that the ability to access the aquifers depends upon a number of factors which are not examined as part of the development plan. To my mind this clearly infers that the development plan is not stating that aquifers are to be relied upon as a water supply system to service residential development on the site. Hence I cannot accept the contentions advanced by the applicants in relation to the dams or the aquifers.
22 I might add that this interpretation is consistent with the evidence of Robert van de Graaff, an expert soil scientist who provided written evidence on behalf of the applicants. He suggested that a family of four persons required 150L of water per day per capita, which equated to 600L per day or 219,000L/year. He noted that this volume of water could be collected at Beechworth with a minimum roof area of 243 square metres. It is likely that houses and outbuildings erected on lots subject to the development plan would have such an area. Mr van de Graaff in fact suggested that up to 500,000L/year might be harvested by roof collection. His real point was not that roof collection would be insufficient for residential use; but that 6ML/year would be required for horticulture or viticulture on a 4 hectare lot and that this volume was not likely to be harvested by roof collection.
23 The next submission made by the applicants related to the identification of proposed water supplies, storage and systems required for fire fighting purposes. In relation to this matter the development plan stated, relevantly: