Ann: First Two Smeltering Furnaces Shipped to Kupang, page-21

Yes,  GMC is close to the power station where diesel generators will be used to generate power.
Have you checked the price of a barrel of oil lately? A 20% increase in a barrel of oil  has already  taken place recently.   Checked the price at the Aussie fuel station lately?
http://www.infomine.com/investment/metal-prices/crude-oil/5-year/
If the Indonesian Gov't continues to subsidize power  at current prices it won't take long before they're bankrupt. Won't be long before Indonesia will need another handout from Australian Gov't courtesy of the Australian taxpayers.