Frequently Asked Questions

Be sure that your mound is in the right position and stable.  Add mound clay to the table and slope of the mound.  Check the height and slope as you install the clay.  Use a hand tamp (good for maintenance) or plate compactor (better) to compact the clay with a minimum depth of 4 inches.  Mound clay in bulk, loose material is easier to form than mound bricks. 

Baseball clay or mound clay is a high-density, compactible clay with a high plasticity.  This clay is best used for building pitcher’s mounds and in batter’s boxes.  It has a higher clay content than infield mix used throughout the infield. 

Infield mix is the official term of the dirt found in the infield of a baseball field.  However, people call it baseball dirt or baseball clay.  Product names like DuraEdge®, Turface®, Beam Clay®, and AMP® refer to different types of infield products.  River Sand, Inc.’s brand of infield mix is AMP® or Accu-Mix-Plus® which refers to the custom, precision blend of sand to clay that we provide in our infield mix.

Mound clay is a specialized clay that is designed for building pitching mounds.  It provides a firm, compactible surface.  It can also be used to amend infields that are too sandy, or contain too much sand. 

It is made of clay.  Every dirt can be defined as the percentage of sand, silt, and clay sized particles.  Sand particles are the largest.  Clay particles are the smallest and silt is in between.  Mound clay is not 100% clay particles as many people think.  Most mound clays are 40-50% sand with the remaining portion 50-60% being silt and clay particles.  This mixture compacts well and provides an excellent media for pitching mounds and the batter’s box.