BTP Westlink Green Site Preperation Underway Posted July 10th, 2013 by BTP Admin This week works began at Graytsone’s latest business and technology precinct, BTP Westlink Green. Site preparation includes the relocation of the Darra Cementco bowling green to another section of the Westlink Green site, making way for Westlink Lane and the precincts first commercial building; 18 Station Avenue.