U.S. Silica Gains Approval for Development of New Mine and Plant Near Fairchild, Wisconsin

FREDERICK, Md., June 30, 2014 /PRNewswire/ -- U.S. Silica Holdings, Inc. (SLCA) today announced that it has received approval from the Town of Fairchild, WI to begin development of a new, three million ton-per-year frac sand mine and plant. The proposed state-of-the-art facility, which will be served by the Union Pacific Railroad, is anticipated to become operational by the fourth quarter of 2015.

Bryan Shinn, president and chief executive officer of U.S. Silica said, "We had tremendous input from the community in helping develop a project that will meet the high environmental and compliance standards we set for ourselves as a Company." Added Shinn: "This is an important step in our plan to bring on additional new capacity to meet customers' rapidly growing needs for high quality, Northern White frac sand in all of the major shale basins in the U.S."

About U.S. Silica

U.S. Silica Holdings, Inc., a member of the Russell 2000, is one of the largest domestic producers of commercial silica, a specialized mineral that is a critical input into the oil and gas proppants end market. The company also processes ground and unground silica sand for a variety of industrial and specialty products end markets such as glass, fiberglass, foundry molds, municipal filtration and recreational uses. During its 100-plus year history, U.S. Silica Holdings, Inc. has developed core competencies in mining, processing, logistics and materials science that enable it to produce and cost-effectively deliver over 250 products to customers across these end markets. U.S. Silica Holdings, Inc. is headquartered in Frederick, Md.

Media Inquiries: Alison Holder
Manager of Corporate Communications
301-682-0326
holder@ussilica.com

Investor Relations Inquiries: Mike Lawson
Director of Investor Relations and Corporate Communications
301-682-0304 =
lawsonm@ussilica.com