Hilcorp Energy completed has its acquisition of BPâs midstream pipeline ownership interests Dec. 18 following approval by the Regulatory Commission of Alaska, the company said Harvest Alaska, Hilcorpâs midstream subsidiary, now owns BPâs approximately 49 percent interest in the Trans-Alaska Pipeline System (TAPS) and 49 percent of Alyeska Service Company (Alyeska) along with other Alaska midstream interests. Alyeska will continue to operate the pipeline. âThe completion of this acquisition is a critical milestone for Harvest,â said Jason Rebrook, Chief Executive Officer of Harvest Midstream, in a statement issued by the company. âTAPS is an icon of American ingenuity and has a proven track record of safe and responsible operations with strong relationships in the communities it touches.â