 In January 2010, in conjunction with BNSF, the SLWC launched unit crude oil train service between the Bakken oil fields and a terminal in Oklahoma.In July 2014 SLWC agreed to purchase the Sooner Sub line from the State of Oklahoma, subject to approval by the Surface Transportation Board; the STB approved the transaction on July 29, 2014.The purchase contract reportedly included a requirement to start a six-month daily passenger service trial run over the line before August 2019, with a financial penalty for not meeting the deadline set at $2.8 million.