Due to the lack of smelting in South Australia, copper ore was initially shipped to Cornwall. The company purchased a Cornish beam engine which was the first in Australia when erected in 1848. Due to the uneconomic state of the mine, in 1868 a decision made to open cut the mine. Mining ceased underground, having reached a depth of 183 metres (600 ft) and open-cut operations starting in 1870 although, over the remaining life of the mine, small underground operations extracted more ore than the expensive open cut. Over the life of the mine, Henry Ayers jealously preserved shareholder profits by ruthlessly controlling wages and expenses. In October 1846 this caused the first strike, of masons and bricklayers, with the company refusing to pay more than 8 shillings per day. With declining copper prices (from £91 per ton in 1845 to £87 in 1848) the company continually sought to reduce wages. In August 1847 the company enticed Thomas Burr to take over as general manager, he having resigned his post as Deputy Surveyor General of South Australia, but by September 1848 the unsatisfied company directors had sacked him. By 1848 the wages reached their lowest level, which precipitated the Burra miners' strike, being the first industrial strike in South Australia and earliest workers' strike of any consequence in Australia. The strike came and went numerous times, with miners not completely returning to work until January 1849. By April 1848 the mine was employing 567 people and supporting a population of 1,500 in the township of Kooringa. Employment at the mine peaked at 1,208 in 1859 and declined continuously until the mine's closure in 1877. In November 1877 most of the remaining disposable equipment and stores were sold off and mining by SAMA ceased. Bon Accord Mine The Bon Accord Mining Company was formed on behalf of Scottish speculators, in the expectation that the Burra lode would extend under the properties boundary. No extension was found and, to recoup money, the townships of Aberdeen (1849) and New Aberdeen (1872) were formed on company land. Stoppage of pumping at the Burra Burra Mine in 1877 caused a rise in the water level in the neighbouring Bon Accord Mine forcing it to also close. Mining activity lasted from 1846 until 1849, was restarted in 1858 and finally ceased four years later with no orebody having been discovered. Many of the mine's buildings remain