Markesan Plant

Green Lake County, Wis.

• U.S. Silica Co. (2010) – 250,203 hours

Rockwood Plant

Wayne County, Mich.

• Imerys (2009 & 2010) – 247,693 hours

Macon County Mines

Macon County, Ga.

• KaMin LLC (2010) – 224,619 hours

Wrens Plant

Jefferson County, Ga.

• U.S. Silica (2006) – 222,633 hours

Dubberly Plant

Webster County, La.

• U.S. Silica (2003) – 214,810 hours

Jackson Plant

Madison County, Tenn.

• Premier Silica LLC (2007) – 210,436 hours

(formerly Carmeuse Industrial Sands)

Brady Plant

McCulloch County, Texas

(210,436 hours)

“MSHA and IMA-NA strive to help the industry achieve its ultimate goal – sending safe and healthy miners home to their families, every shift, every day,” said Kevin Porterfield, IMA-NA’s General Manager (Talc) of Specialty Minerals, Inc. (Bethlehem, Pa.).  “We’re pleased to recognize IMA-NA member companies that have compiled excellent safety records and who serve as examples for other companies.”