25. Definitions Volume Two National Grid as identified on the Zone Maps. Transmission Lines National as mapped on the National Transportation Route Map. Transportation Route Natural clarity refers to the transmission of light through water. There are two aspects: visual clarity, which can be taken as the hydrological range – the distance a perfect black body can be seen horizontally underwater; and the depth to which diffuse sunlight can penetrate vertically into water. Natural clarity shall be measured by using accepted scientific methods, and shall be taken to be the clarity of a water body immediately upstream of any discharge from a land disturbance site, or in the case of lakes or the sea, the clarity of water beyond the sediment ‘plume’ in the water. Reduction in clarity due to the discharge shall be measured at a point 50m downstream or offshore from the point of discharge, or two river widths, whichever is the great er. Natural ground level means the ground level before any earthworks have been undertaken. Natural hazard has the same meaning as in Section 2 of the Act. Net site area means the total area of the site less any land used or dedicated for access to the site (i.e. access legs or right of ways) and any area subject to proposed road widening or designated for any other purpo se. Network utility has the same meaning as network utility operator in Section 2 of the Act. Network utility has the same meaning as in Section 2 of the Act. operator Network utility means any structure essential to the operation and provision of a structure (network) utility service. Night for the purposes of noise controls means half of one hour after sunset and half of one hour before sunrise. No. means number. Noise has the same meaning as in Section 2 of the Act. Noise sensitive means any use of land and/or buildings that is likely to be activity susceptible to the effects of noise emitted from nearby land uses in the course of their legitimate operation and functioning. Examples include dwellings, visitor accommodation, hospitals, health care and medical centres, residential care housing, educational institutions, structures for the purpose of, or activities involving public assembl y. Non-commercial means the placing or dumping of fill that does not involve clean fill remuneration paid, or any other form of consideration provided, to the contractor or person(s) bringing the fill into the site, whether or not consideration provided to the owner is the sole reason for the placing or dumping of the fill. Non-consumptive means the use of water but not the actual consumption of that water. uses For example, fishing, swimmin g. 25 – 16