PART XXXII OPEN CUT WORKINGS IN MINING OPERATIONS — Heights of faces and benches
656
(1) The bench or face height for quarries with unconsolidated material including sand and gravel shall not exceed 5 metres and, in any event, shall not be higher than can be reached with equipment in use.
656(2)
The bench or face height for quarries with consolidated material shall not exceed 10 metres and, in any event, shall not be higher than can be reached with equipment in use.
656(3)
The bench or face height for open pits with consolidated material shall not exceed 20 metres and, in any event, shall not be higher than can be reached with equipment in use.
656(4)
When a quarry referred to in subsection (1) is worked in 2 or more benches, it shall be worked at a 45 ° angle with catchment berms left in place to collect material falling to the bench below.
656(5)
When a quarry referred to in subsection (2) is worked in 2 or more benches, it shall be worked at a 55 ° angle with catchment berms left in place to collect material falling to the bench below.
656(6)
A part of a face or wall of a surface mine or quarry shall not overhang.
Not legal advice. Verify the cited article against the signed agreement.