By definition the keystone is the topmost stone of an arch, popularly thought of as especially holding the others in place. This award recognizes an individual in the aggregates industry who has shown exceptional leadership and outstanding dedication to advance the goals, growth, and well being of the Indiana aggregates industry.
IMAA President and Executive Director (no entry form to submit)
Current Keystone Winners:
(presented at following year workshop)
1998 Ken Mulzer, Sr., Mulzer Crushed Stone
1999 David Grom, Stoneco, Inc.
2002 John Schuler, Martin Marietta Aggregates
2003 John Hamm, Jr., Liter's of Indiana, Inc.
2005 Larry Brost, Stone-Street Quarries, Inc.
2007 Ken Wanstrath, New Point Stone Co., Inc.
2010 Ken Rush, Sellersburg Stone Company