Coal Port Operation Maintenance. First Words. PT. Bangun Arta Hutama is a national private company engaged in the mining industry We provide operation and maintenance services for coal mining industry, ... Port Sebamban PT. Tunas Inti Abadi, Sungai Loban, Tanah Bumbu, Kalimantan Selatan. Port Satui PT. Bumi Daya Energi with PT.