Marlborough Sounds Resource Management Plan b) No woody material of greater than 100mm diameter shall be left in any permanently flowing river, lake, wetland or sea as a result of a land disturbance operation; and c) All land disturbance sites are to be stable when subject to a storm event of return frequency probability of 10% or less. 38.1.7.1.1 Exception Except any land disturbance activity that does not comply with the above conditions or is in an area identified as a hazard area that is required for the purposes of constructing or providing access to any structure requiring a building permit under the Building Act 1991, shall be a Discretionary Activity, with no restriction on the exercise of Council’s discretion. 38.1.7.2 Cultivation 38.1.7.2.1 Contour Cultivation Cultivation is to be parallel to the contour of the land, with the exception that on lands of slope greater than 20° , up to 15% of the cultivated area may be cultivated at an angle to the contour, and trenching or cable laying may be carried out at an angle to the contour. 38.1.7.2.2 Riparian Management Zones No cultivation is to take place within riparian management zones as specified in the schedule of water bodies and Table 1 in Appendix I and as mapped in Volume Three Maps except trenching for cable laying and post holes for utility line support structures. 38.1.7.2.3 Revegetation The vegetation cover of a cultivation site shall be restored within 24 months of the end of the operation, to a level where the amount of bare ground is no more than 20% greater than prior to the land disturbance taking place. 38.1.7.3 Excavation and Filling 38.1.7.3.1 Gradients The gradient of any side cut excavation must not exceed an average of 9.5° (1:6) and must not exceed 11.3° (1:5) along any length of more than 20 metres. 38.1.7.3.2 Water Control and Culverts Stormwater controls, water table cut-offs, and culverts are to be installed to ensure that erosion does not occur on the inside edge of the cut. No culvert size less than 300mm may be used to drain any side-cut excavation. 38.1.7.3.3 Stabilisation Batters and side castings are to be stabilised by appropriate measures such as seeding, compacting, drainage and/or other methods of revegetation. 38.1.7.3.4 Run-off Run-off from water tables or surfaces of side cut excavations is to be directed to stable land areas. 38 - 6