On March 7, 2019, William E. Barker, the Principal Strategy Officer of Hi-Crush GP LLC, the general partner of Hi-Crush Partners LP (the “Partnership”), notified the Partnership that he intends to resign as Principal Strategy Officer, effective March 15, 2019, to resume his career in the practice of law. Timothy S. Lambrecht, the Partnership’s Director, Strategic Initiatives, will assume the interim role leading the strategy team, reporting directly to the Chief Executive Officer.