2. General Rules Volume Two 2.39.1.10. A network utility structure for a line within the Rural Environment Zone or Coastal Environment Zone must be set back a minimum distance of 15m from any road intersection and must be measured parallel from the centreline of the carriageways, at the point where the roads intersect. 2.39.1.11. A building larger than 15m in ground floor area or over 2m in height must be 2 setback from the road boundary by a distance of not less than half the height of the building. 2.39.1.12. On any land zoned Urban Residential 1, Urban Residential 2 (including Greenfields) or Urban Residential 3, a building larger than 1m in ground floor 2 area or 2m in height must be set back from the property boundaries by a distance of not less than half the height of the structure. 2.39.1.13. Excavation, filling, vegetation clearance (indigenous and non-indigenous), noise and discharge rules for the relevant zone in which the network utility is located must be complied with. 2.39.1.14. A line or network utility structure, or a telecommunication, radio communication or meteorological facility, or a building or depot must not be located: (a) in, or within 8m of, a Significant Wetland; (b) within 8m of a river or the Drainage Channel Network; (c) on, or adjacent to, any land used for the purposes of a farm airstrip, or in such a manner as to adversely affect the safe operation of a farm airstrip existing at the time of the Plan becoming operative. 2.39.2. Trenching for cable laying. 2.39.2.1. Any earth not placed back in the trench must be re-located in a stable location. 2.39.2.2. Trenching must not occur in, or within 8m of, a Significant Wetland or Water Resource Unit with a Natural State water quality classification. 2.39.2.3. Trenching must not occur within such proximity to any abstraction point for a community drinking water supply registered under section 69J of the Health Act 1956 as to cause contamination of that water supply. 2.39.2.4. The vegetation cover of a trench site must be restored within 6 months of the end of the operation. 2.39.2.5. Woody material greater than 100mm in diameter or soil debris must: (a) not be left within 8m of, or deposited in, a river (excluding an ephemeral river or intermittently flowing river, when not flowing), lake, Significant Wetland or the coastal marine area; (b) not be left in a position where it can enter, or be carried into, a river (excluding an ephemeral river), lake, Significant Wetland 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. 2.39.2.6. Trenching must not cause any conspicuous change in the colour or visual clarity of any flowing river after reasonable mixing, or the water in a Significant Wetland, lake or the coastal marine area, measured as follows: (a) hue must not be changed by more than 10 points on the Munsell scale; 2 – 62