Volume Two 15. Marina Zone excavation. The diameter of a culvert used to drain excavation must not be less than 300mm. 15.3.17. Filling of land with clean fill. 15.3.17.1. The filling must not use commercial clean fill. 15.3.17.2. No filling in excess of 1000m must occur within any 24 month period. 3 15.3.17.3. A filled area must be designed, constructed and maintained to ensure it is stable and remains effective after completion of filling. 15.3.17.4. Water control measures and sediment control measures must be designed, constructed and maintained in a fill area, such that the area is stable and the measures remain effective after completion of the filling. The diameter of a culvert used to drain excavation must not be less than 300mm. 15.3.17.5. When the filling has been completed, the filled area must be covered with at least 200mm of soil, and sown down with a suitable vegetative cover or other means to achieve a rapid vegetative cover must be used. 15.3.17.6. Filling must not be in, or within 8m of, a river (except an ephemeral river when not flowing) or the coastal marine area. 15.3.18. Non-indigenous vegetation clearance. 15.3.18.1. Vegetation must not be removed by fire or mechanical means within 8m of a river (except an ephemeral river, or intermittently flowing river when not flowing) or the coastal marine area. 15.3.18.2. All trees must be felled away from a river (except an ephemeral river, or intermittently flowing river when not flowing) or the coastal marine area. 15.3.18.3. No tree or log must be dragged through the bed of a river (except an ephemeral river or intermittently flowing river when not flowing) or the coastal marine area. 15.3.18.4. Wheeled or tracked machinery must not be operated in, or within 8m of, a river (except an ephemeral river or intermittently flowing river, when not flowing) or the coastal marine area. 15.3.18.5. On completion of a vegetation clearance, a suitable vegetative cover that will mitigate soil loss, must be restored on the site so that, within 24 months the amount of bare ground is to be no more than 20% greater than prior to the vegetation clearance taking place. 15.3.18.6. The depth of topsoil removed must not exceed more than 20mm over more than 15% of any vegetation clearance site. 15.3.18.7. Woody material greater than 100mm in diameter or soil debris must: (a) not be left within 8m of, or deposited in, a river (except an ephemeral river or intermittently flowing river, when not flowing) or the coastal marine area; (b) not be left in a position where it can enter, or be carried into, a river (except an ephemeral river) or the coastal marine area; (c) be stored on stable ground; (d) be managed to avoid accumulation to levels that could cause erosion or instability of the land. 15 – 9