Highwall definitions

Highwall

The unexcavated face of exposed overburden and coal in a surface mine or in a face or bank on the uphill side of a contour mine excavation.
Found on http://www.coaleducation.org/glossary.htm

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Highwall

The unexcavated face of exposed overburden and coal in a surface mine or in a face or bank on the uphill side of a contour mine excavation.
Found on http://www.rocksandminerals.com/glossary.htm

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highwall

the unexcavated face of exposed overburden and coal in a surface mine.
Found on https://www.infoplease.com/dictionary/highwall

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