Chapter 9 - Coastal Marine (b) Efficient use of coastal space is made by using the minimum area of the coastal marine area necessary for the reclamation, drainage or impoundment; and (c) The finished appearance of the reclaimed or drained area, or the impoundment, including its size, shape and the materials used is as far as practicable compatible with the environment in which it is located. Policy 1.2 Ensure that material used to create and form any reclamation or impoundment does not include contaminants which have the potential to adversely affect the coastal marine area. Policy 1.3 Any proposal for dredging and disposal within the coastal marine area shall demonstrate: (a) The justification for dredging; (b) An appropriate disposal method and disposal site; and (c) The measures undertaken to avoid, remedy or mitigate adverse effects on marine habitats, recreation values, adjacent activities or users, water quality and other adverse environmental effects. Policy 1.4 Avoid, as far as practicable, then remedy or mitigate the adverse effects of activities that disturb or alter the foreshore and/ or seabed on any of the following: (a) Conservation and ecological values; (b) Cultural and iwi values; (c) Heritage and amenity values; (d) Landscape, seascape and aesthetic values; (e) Marine habitats and sustainability; (f) Natural character of the coastal environment; (g) Navigational safety; (h) Other activities, including those on land; (i) Public access to and along the coastal marine area; (j) Public health and safety; (k) Recreation values; and (l) Water quality. Some alteration to the foreshore and seabed may be necessary to enable the continuation of some coastal marine activities. The policies seek to provide a guide for their continuation while controlling the potentially significant adverse effects which can arise from any alteration to the foreshore or seabed. 9 - 17