Question 1090007
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For your info:


<pre>
    Most of Harmony Sand & Gravel's products will weight approximately 2,840 pounds per cubic yard or about 1.42 tons per cubic yard. 
    For estimating purposes, most Contractor's consider the yield to be 3,000 pounds per cubic yard or 1.5 tons per cubic yard.
</pre>
 
From http://harmonysandgravel.com/material-weights



So your input data is far from reality.