 By the 1960s the trend towards more efficient large capacity equipment continued, with additional generators of 120 MW capacity installed at Yallourn, and the Hazelwood Power Station with eight 200 MW units commissioned along with a new open cut mine and briquette factory.The Hazelwood mine was not as successful as planned as Morwell coal was unsuitable for making briquettes, resulting in coal needing to be railed from the Yallourn mine.By the end of the decade brown coal was used to generate 90 per cent of Victoria's electricity supply, with all of the coal sourced from open cut mines under SECV control.