Appendix 7 Volume Three Topographical Detail for Urban Subdivisions Generally topographical detail need only be shown on that part of the land where new building sites (including access to the sites), and allotment boundaries are proposed or the degree of subdivision is intense (approaching minimum allotment sizes). It does not need to be shown over large allotments which are balance areas, unless it is necessary to be shown as the basis for possible future extensions to the subdivision or unless in specific cases the Council requests it. Topographical Detail for Rural Subdivisions The topographical detail shown on a rural Scheme Plan does not need to be as detailed as that required for an urban subdivision. Sufficient data of the same nature as that set out in “Other relevant site details” should be shown for the indicative building site and any proposed access. Topographical detail may also be relevant to the task of identifying proposed boundaries on the ground or establishing any necessary conditions of approval. Aerial photographs, where available, may be used to supplement topographical data, provided they are of sufficient scale and clarity to be readily interpreted and must have the boundaries of the proposed subdivision clearly indicated thereon. The circumstances of each case will determine the extent and the detail of topographical information which should be shown but the Council may ask for more information where it is necessary to assist the processing of any application. Additional information The following additional information must be supplied with the Scheme Plan: 1. Copies of Computer Register(s) no older than one month from the date of application. 2. Copies of all consent notices and any other relevant interests registered. 3. Where relevant, details of jointly owned access allotments and details of the proposed shared ownership. Suitable Building Site All applications to subdivide land are required to demonstrate that subdivision and subsequent activities are not likely to accelerate, worsen, or result in material damage to that land, other land or structure, by erosion, falling debris, subsidence, slippage or inundation from any source. Where proposed allotments might reasonably be expected to accommodate a future dwelling or dwellings, and any land is likely to be subject to material damage by erosion, falling debris, subsidence, slippage or inundation, the application must demonstrate that each allotment has within it a suitable building site. Each such suitable building site must be shown on the Scheme Plan and the application must be supported by an appropriate professional report as follows: Where land instability is likely, the application must be supported by a geotechnical report prepared by a suitably qualified Chartered Professional Engineer for the purpose of supplying opinions as to the stability of land. The Council provides the format for the preparation of such reports. Where inundation is likely, the application must be supported by a catchment analysis prepared by a Chartered Professional Engineer experienced in flood hydraulics to demonstrate that each allotment has a flood-free building platform. For the purposes of the catchment analysis, a 1 in 50 year return period must be used. App 7 – 4