Groff Engineering Mining Blog

There are a few recent developments affecting the valuation of mineral deposits and reporting of mineral reserves.  The line between reserve estimation and minerals appraisal or minerals valuation is becoming increasingly blurred.  Declaration of "proven...

Several years ago I began a diesel fuel sampling and testing program not because I was particularly savvy about fleet management at the time, but because I had a particular experience that I didn't want to repeat!  In general, we do not give much thought...

This post is a mini case study about the importance of an effective lubrication program, specifically as it relates to draglines and shovels, or "big iron."  It was later published in Machinery Lubrication Magazine! Most of the time when I ask mine...

I listen to news on my morning drive from the Gateway to Appalachia to my firm in Lexington, KY, where I have worked for the past several years.  In this part of the country, the 'war on coal' rhetoric has been a constant drum.  Yes, there are market...