Indonesia's Merukh Enterprises Inc has gained a high calorie coal export contract from TMM Coal, a Mexican mining company, in a deal worth $3 billion. The first shipment of 20 Mt is to commence this year. Group chairman, Jusuf Merukh, said the export of coal with calorie between 6,835-7,414 cal/g will be supplied by Merukh Flores Coal, from production of operation located at Ngada regency, East Nusa Tenggara province.