15. Marina Zone Volume Two 15.3.14. Clearance of sand, shell, shingle or other natural material from a river mouth for flood mitigation. 15.3.14.1. The clearance must be carried out by, or on behalf of, the Marlborough District Council. 15.3.14.2. The clearance must be limited to the amount necessary to clear the river mouth for flood mitigation purposes. 15.3.14.3. All equipment must be removed from the site on completion of the operation. 15.3.14.4. The best practicable option must be adopted to avoid significant sedimentation. 15.3.14.5. The clearance must not cause a safety hazard to other users of the river mouth. 15.3.14.6. There must be no contaminants released from equipment being used for the activity. 15.3.14.7. Fish passage must not be impeded. 15.3.14.8. Refuelling of equipment must not take place on any area of foreshore or seabed. 15.3.15. Clearance of sand, shell, shingle or other natural material from a stormwater outfall pipeline, drain or culvert. 15.3.15.1. The clearance must be undertaken by non-mechanical means, or be undertaken by, or on behalf of, the Marlborough District Council. 15.3.15.2. The clearance must be limited to the amount necessary to clear the outfall, pipeline, drain or culvert for flood mitigation purposes. 15.3.15.3. All equipment must be removed from the site on completion of the clearance. 15.3.15.4. The best practicable option must be adopted to avoid significant sedimentation. 15.3.15.5. The clearance must not cause a safety hazard to other users of the area. 15.3.15.6. There must be no contaminants released from equipment being used for the clearance. 15.3.15.7. Fish passage must not be impeded. 15.3.15.8. Refuelling of equipment must not take place on any area of foreshore or seabed. 15.3.16. Excavation. 15.3.16.1. Excavation must not be in, or within 8m of, a river (except an ephemeral river when not flowing) or the coastal marine area. 15.3.16.2. 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. 15.3.16.3. Batters must designed and constructed to ensure they are stable and remain effective after completion of the excavation. 15.3.16.4. Water control measures and sediment control measures must be designed, constructed and maintained in an area disturbed by excavation, such that the area is stable and the measures remain effective after completion of the 15 – 8