Lease rates may come under pressure as capacity grows, hitting the profitability of master limited partnerships. Rose Rock Midstream, which is building tanks, said average rates had fallen. 随着容量的增加,租金也许会承受压力,这将打击业主有限合伙制企业的盈利能力。正在建造油罐的RoseRockMidstream表示,平均租金已经下跌。