For Immediate Release - Unimin Corporation and Hoffman Construction Company begin work at Tunnel City Sand Mine Site

February 20, 2012

BLACK RIVER FALLS, WI. – February 20, 2012.

Hoffman Construction began preparation work on the Tunnel City sand mine this month. This initial step of the project includes site preparation and stripping overburden that will be stockpiled for future use, as well as preparing and developing the site where the sand plant will eventually be constructed. Completion of this preliminary portion of the project is scheduled for April 27, 2012.

Hoffman and Unimin are committed to being good neighbors to the residents of Tunnel City and surrounding area. To date, more than 50 new jobs have been created with over 150 full time works at the site. Hoffman President, Jim Hoffman, expects that number to climb as the work continues into the next phase of plant construction.

“Hoffman is dedicated to making sure this project gets started on the right foot. We are

proud that Unimin selected Hoffman Construction to help with the site preparation and

look forward to continuing our partnership with Unimin in making the project a success

in the community and long time employer in the area.”, says Jim Hoffman, President of

Hoffman Construction.

About Hoffman Construction Company

Hoffman Construction Company is an industry leader in highway and heavy construction. Since their founding in 1927, they have specialized in earthmoving operations, underground construction, and general project management. The company has been recognized for its experience and attention to detail through numerous awards from the Wisconsin and Minnesota Departments of Transportation. For more information, visit

About Unimin Corporation

Founded in 1970, Unimin Corporation has grown from a small, local sand mining company to become a leading producer of non-metallic industrial minerals in the worldwide Sibelco Group. Their products are the fundamental building blocks of nearly every manufacturing and industrial process.

Unimin employs a diverse and highly skilled team of professionals to convert natural mineral resources into engineered customer solutions. For more information, visit

For more information contact:

Jim Hoffman, President

Hoffman Construction, Co.

(715) 284-2512