COTABATO CITY- A 12-hour brownout will hit North Cotabato Electric Cooperative (Cotelco-PPALMA) area on Saturday, December 12, the National Grid Corporation of the Philippines (NGCP) announced today.Melfrance Bambi Capulong, NGCP Southern Mindanao communications officer, said the power interruption will start at 6 a.m. and expected to be restored at 6 p.m. This is for maintenance works along our Sultan Kudarat-Midsayap 69KV line, Capulong said in a text message Thursday.Affected towns are Pigcawayan, Pikit, Alamada, Libungan, Midsayap andAleosan, more known as PPALMA.