ISLAMABAD: The drilling and construction work has started on the second largest point in Thar; block-I of Thar Coal area under the China Pakistan Economic Corridor. According to a report quoting official sources, four billion tonnes of coal exist in the 150-Kilometre long block. The cost of the block-1 project amounts to Rs200 billion. During the digging, two power plants with capacity of 132 megawatts have been installed. The construction work in Block-II is also underway at full pace at the cost of Rs220 billion.