b'Heifer Creek Cutting Heifer Creek Cutting was to be 104efficient to carve a cutting than feet deep at its centre pointthefollow the specs for a tunnel. deepest in Australia at the time.They completed their preliminary The 28,000 figure that Thiess Brossurveying by December of 1939, and quoted was considered impossiblein January, the brothers set about by many. But in signature fashion,their first job as a truly unified force. that is, with a heady combination of ingenuity and gumptionthey Heifer Creek, 1940. determined that it would be more 14'