Unimin, together with Union Pacific Railroad and Twin Eagle Sand Logistics, delivered a 140 car unit train to the Mission Rail Terminal in the heart of the Eagle Ford shale earlier this month. According to the San Antonio Business Journal, the unit train was powered by four diesel engines and measured 6200 feet, setting a record for the largest frac sand delivery by rail in history. You can read the San Antonio Business Journal article here.
For those interested in how to prepare for and receive such a shipment of frac sand, you can hear from Jason Jennaro (Senior Vice President of Sand and Oilfield Services at Twin Engine) at the 4th Annual Frac Sand Supply & Logistics Conference, being held in San Antonio on September 24 & 25.