Columbia Quarry Co. operates limestone aggregate quarries located in Midwestern Illinois, adjacent to metro St. Louis.  The combined production capabilities are in excess of a million tons per year of high quality stone.

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The US Department of Labor Mine Safety and Health Administration (MSHA) have awarded the Columbia Quarry Company, Dupo, IL operation their prestigious Sentinels of Safety Award.  The specific award is for the Small Metal Nonmetal Mill Group.  The Dupo – Plant #9 Operation is recognized by MSHA for its outstanding safety record in 2009 that included no lost-workday injuries.  A traveling trophy and certificate of achievement from the Assistant Secretary of Labor for Mine Safety and Health commemorated the award.  The trophy was forwarded to Dupo from the Dixie Lee Quarry in Knoxville, TN (the 2008 winner) and will continue on its journey from Dupo to the 2010 recipient.  This award and traveling trophy is only one of twenty that is presented annually for all mining operation in the United States. 

The Columbia Quarry, Dupo Operation has been producing limestone aggregate for St. Clair County and surrounding area construction contractors since the 1950’s.  The construction materials are IDOT approved and maintain a high degree of consistency. Each of the 25 employees is proud of their accomplishments and has a lot of pride in producing quality products.