The modelling and monitoring undertaken as conditions of the current disposal consent and discussions with the Working Party have recommended a significant extension to the Heyward’s disposal site and a minor extension to the Aramoana site in order to provide for the disposal activity over the next 35 years. The extensions are recommended by specialist consultants to allow for adaptive management of the disposal activity on surf breaks, which are identified to be of national significance in the New Zealand Coastal Policy Statement 2010.
Accordingly, Port Otago has applied for a long term resource consent for disposal at the Shelly Beach and a new extended Heyward’s site of approximately 225 hectares and new Aramoana site of 36 hectares. The sites are illustrated below.
The maximum annual disposal volume will remain the same as the current resource consent (450,000m3) and includes material derived from both maintenance and capital dredging.
New “rolling average” limits are proposed which will reduce the amount of material able to be disposed of in consecutive years. The proposed long-term disposal sites are as follows:
Heyward Point, being an area of approximately 225 hectares, will receive up to 200,000m³/year of sand, rock and silt material, measured on a 5-yearly rolling average. Except that, in the event the Aramoana site is not able to be used for any reason, then the Heyward Point site will receive up to 300,000m3/year, measured on a 5-yearly rolling average basis. The grid coordinates for the proposed Heyward Point site are:
45º 44.62' S 170º 41.40' E
45º 45.26' S 170º 42.12' E
45º 44.75' S 170º 43.03' E
45º 44.12' S 170º 42.31' E
Aramoana, being an area of approximately 36 hectares, will receive up to 100,000m³/year of sand , measured on a 5-yearly rolling average. The grid coordinates for the proposed Aramoana site are:
45º 45.87' S 170º 42.24' E
45º 46.15' S 170º 42.71' E
45º 45.96' S 170º 42.94' E
45º 45.68' S 170º 42.46' E
Shelly Beach, being an area of approximately 14.5 hectares, will receive up to 50,000m³/year of sand, measured annually. The grid coordinates for the proposed Shelly Beach site are:
45º 46.56'S 170º 42.81'E
45º 46.74'S 170º 42.56'E
45º 46.85'S 170º 42.77'E
45º 46.66'S 170º 42.98'E
A copy of the consent application and AEE is available here.