Historic viaducts closed for safety, Hump Ridge Track remains open - Department of Conservation Department of Conservation DOC Te Anau Operations Manager John Lucas says engineering and heritage conservation expertise will help determine the path forward for the century- ... Garry Law 31 Lansell Drive, Dannemora, Auckland 2016 +64 27 5665 764 (Mobile) Chair Engineering New Zealand Engineering Heritage Board, Te Ao Rangahau. See here. https://www.engineeringnz.org/programmes/heritage/