Tutupan mine is one of the largest open cut coal mines in Indonesia, situated in the South Kalimantan province 300 km from Banjarmasin. The mine has a total coal production of over 40 million tons per annum. The Tutupan’s pit dimensions are approximately 16,000 x 2,500 x 250 m. The Adaro Tutupan mine is a long standing customer, having used Leica Geosystems monitoring sensors for slope monitoring since June 2004. Currently, 11 Leica Geosystems total stations with hundreds of monitoring prisms are installed in the pit slopes to perform slope stability monitoring. The monitoring prisms are installed on the slope surface with intervals of 100-150 m and the process of installing many more prisms to cover all the pit slopes is ongoing. The total stations measure distances

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